Manual / Guide · 1964
Teletype Bulletin 273B Vol 1, *Technical Manual, 32 and 33 Teleprinter Sets*, Nov 1964 (182 pp; includes 574-100-102 technical data: 0.020/0.060 A line current, 8-level 11-unit code, tape 11/16 in and 1 in, 10 rows/in, feed hole 0.0465 in)
/ • BULLETIN 273B VOL 1 TECHNICAL MANUAL 32 AND 33 TELETYPEWRITER SETS KEYBOARD SEND-RECEIVE (KSR) RECEIVE-ONLY (RO) AUTOMATIC SEND- RECEIVE (ASR) CONTENTS DESCRIPTION DISASSEMBLY AND REASSEMBLY INSTALLATION . LUBRICATION PRINCIPLES OF OPERATION TELETYPE® CORPORATION 5!5!55 TOUHY AVENUE. SKOKIE, ILLINOIS SEE I N DIVIDU A L S ECTIONS FOR CCF'YRIGHT N OTICES. Printed in U. S. A. 273B VOLUME 1 INTRODUCTION Bulletin 27 3 Bis a technical manual that provides general and specific information about the 32 and 33 Keyboard Send-Receive (KSR), Receive-Only (RO), and Automatic Send-Receive (ASR) Teletypewriter Sets and their component units. It consists of two volumes. Volume 1 contains a description of the 32 and 33 Teletypewriter Sets and gives installation instructions. Also included in Volume 1 is information on the disassembly and reassembly, lubrication, and principles of operation of the component units of the Teletypewriter Sets. Volume 2 includes adjustment information on all component units of 32 and 33 Teletypewriter Sets. Each volume is made up of a group of appropriate independent sections. Each independent section is complete within itself - it is separately identified by a title and section number, and the pages are numbered consecutively. Each individual section is identified by a 9-digit section number which appears at the top of each page of a section. The section number appears on the left corner of left- hand pages and on the right corner of right-hand pages. In addition, the section number on the first page contains the suffix TC which identifies it as a Teletype Corporation section. All sections are placed in the technical manual in ascending numerical order. To locate specific information, refer to the table of contents on the following page. In the first column, under "Equipment," find the name of the component unit or set in question. Move across the page to the second column and locate the title being sought. The applicable 9-digit section number can then be found in the third column. Turn to Page 1 of the applicable section, and the contents of that section will be found. A 273B November, 1964 Change 4 FILING INSTRUCTIONS ,,.--._ 1. The following filing instructions apply to changes sent to the field. 2. Asterisks (*) in the table of contents indicate changes. 3. When the issue of a section changes, replace the old issue with the attached new one. 4. In the case of addendums, turn to the affected section and follow the instructions on the first page of the attached addendum. 5. Replace the old table of contents with this new one. VOLUME 1 TABLE OF CONTENTS Equipment ' ' .... Title Section Issue Teletypewriter Set Teletypewriter Set Description Installation 574-100-102 574-100-201 1 3 Keyboard Keyboard Keyboard Principles of Operation Lubrication Disassembly and Reassembly 574-121-100 574-121-701 574-121-702 1 1 1 Typing Unit Typing Unit Typing Unit Principles of Operation Lubrication Disassembly and Reassembly 574-122-100 574-122-701 574-122-702 · 1 1 1 Call Control Unit Principles of Operation 574-123-101 2* Tape Reader Tape Reader Tape Reader Principles of Operation Lubrication Disassembly and Reassembly 574-124-100 574-124-701 574-124-702 1 1 1 Tape Punch Tape Punch Tape Punch Principles of Operation Lubrication Disassembly and Reassembly 574-125-100 574-125-701 574-125-702 1 1 1 Cover Adjustments, Lubrication, and Disassembly and Reassembly 57 4-126-100 1 ' \ B SECTION 574-100-102TC Issue 1, July, 1964 TELETYPE CORPORATION Skokie, Illinois, U.S.A. 32 AND 33 TELETYPEWRITER SETS DESCRIPTION CONTENTS PAGE 1 1. GENERAL . 2. TELETYPEWRITER SETS. 2 KEYBOARD SEND-RECEIVE (KSR) TELETYPEWRITER SETS . 2 RECEIVE-ONLY (RO) TELETYPEWRITER SETS . 3 AUTOMATIC SEND-RECEIVE (ASR) TELETYPEWRITER SETS . 3 ACCESSORIES 3 COMPONENTS 6 KEYBOARD 6 I , 3. . A. KSR and ASR Keyboard B. RO Keyboard . 1.02 9 MOTOR AND DRIVE PARTS 12 CALL CONTROL UNIT 12 COVER AND SUBBASE 15 TAPE READER 15 TAPE PUNCH 16 4. TYPICAL APPLICATIONS. 17 5. TECHNICAL DATA . . 18 1. GENERAL 1.01 The 32 and 33 Teletypewriter Sets described herein are electromechanical apparatus that provide terminal facilities for exchanging recorded communication via appropriate transmission facilities, including telegraph lines, telephone networks, and radio channels. 1.03 References to the "left," "right," "up," "down," "front," or "rear," etc consider the Teletypewriter Set to be viewed from a position where the keyboard cover faces the viewer, with the platen knob to the viewer's left. 6 9 TYPING UNIT . and available accessories. The section describes typical applications and gives pertinent technical data. Also, the section is issued to present the information in a separate section. This section is issued to provide a brief description of the 32 and 33 Teletypewriter Sets, together with principal components 1.04 The following Teletypewriter Sets are covered: (a) Keyboard Send-Receive (KSR) Teletypewriter Set (Figure 1). (b) Receive-Only (RO) Teletypewriter Set (Figure 2). (c) Automatic Send-Receive (ASR) Teletypewriter Set (Figures 3 and 4). 1.05 Transmission and reception are effected by a sta,rt-stop signaling code which is carried by the transmission facilities. The basic difference between the 32 and 33 Teletypewriter Sets is that the former utilizes a 5-level code and the latter utilizes an 8-level code. (See the appropriate section for an explanation of codes.) The Teletypewriter Set will operate at speeds up to 100 words per minute (wpm). © 1962, 1963, and 1964 by Teletype Corporation All rights reserved Printed in U.S. A. Page 1 SECTION 574-100-102 ---- WINDOW -----=---PAPER ROLL \ ----- COVER ) , . f . ~ .'f"· • :· ·- _ _ .._ ~ .. ·, . .- .D . J., '. I . ,( -~ ' ~ ·: ~ . j . ~ .. ) KEYBOARD COVER (RIGHT FRONT VIEW) Figure 1 - Keyboard Send-Receive (KSR) Teletypewriter Set 2. TELETYPEWRITER SETS KEYBOARD SEND-RECEIVE (KSR) TELETYPEWRITER SETS (Figure 5) 2.01 The KSR provides facilities for originating messages for trans~ission by the manual operation of a keyboard, and for receiving and printing messages, whether originated locally or remotely, on page-width copy paper. 2.02 The basic KSR consists of the following major components (Figures 1 and 5) which are described in the indicated paragraphs: COMPONENT PARAGRAPHS Keyboard Typing Unit Motor Call Control Unit Cover Subbase 3.01 - 3.04 3.05 - 3.06 3.07 - 3.08 3.09 - 3.11 3.12 3.13 2.03 The keyboard, typing unit, and call control unit are mounted on the subbase (Figure 5). The motor is mounted on the typing unit base casting. The cover encloses the other components and is attached to the subbase. ) \ _.,- I J Page 2 ISS 1, SECTION 574-100-102 On friction feed Teletypewriter Sets, paper feeds from a roll at the rear and is led around a platen, where it is printed. On sprocket feed Teletypewriter Sets, forms normally feed from the forms' original container at the rear, under a paper roll spindle, and around a piaten, where they are printed. A window permits viewing the printed copy. Facilities are provided for connecting the KSR to an ac power source and the transmission facilities. The 32 KSR has a 3-row keyboard (Figure 6) and uses a 5-level start-stop signaling code. The 33 KSR has a 4-row keyboard (Figure 7) and uses an 8-level startstop signaling code. (d) To transmit messages from tape while making a page copy with or without perforating tape. 2.09 The basic ASR includes the same components as the KSR listed in 2. 02 above. Paragraphs 2.03 and 2.04 above also apply to the ASR. In addition, they have a tape reader (3.14 - 3.15) and a tape punch (3.16 - 3.18). 2.04 RECEIVE-ONLY (RO) TELETYPEWRITER SETS (Figure 2) 2.05 The RO provides facilities for receiving messages and printing them on pagewidth copy paper. .2.10 The tape punch and tape reader are mounted on the left side of the ASR. The tape feeds forward from a roll into the tape punch, where it is perforated. It can then be fed into the tape reader for transmission. Controls are provided for the tape punch and tape reader. A removable metallic chad container collects the paper (chad) punched out of the perforations in the tape. ACCESSORIES 2.06 The basic RO consists of the same components as the KSR, listed in 2. 02 above. However, the keyboard is blank and has no facilities for transmission. Paragraph 2. 03 above also applies to the RO. 2.07 The 32 RO uses a 5-level start-stop signaling code , and the 33 RO uses an 8-level s t art-stop signaling code. AUTOMATIC SEND-RECEIVE (ASR) TELE- TYPEWRITER SETS (Figures 3 and 4) 2.08 The ASR provides facilities for originating messages for transmission by either the manual operation of a keyboard or the reading of perforated paper tape. They provide facilities for recording messages, whether originated locally or remotely, by perforating them in tape and/ or printing them on page-width copy paper. The ASR may be used in t he following ways: (a) To transmit messages from the keyboard while making a printed page copy with or without perforating tape. 2.11 A number of optional accessories are available with the equipment, including the following: (a) A sheet metal stand (Figure 3) , which will support the subbase and components at a convenient operating level. It consists of chrome feet, equipped with leveling screws, and an enclosure to house auxiliary apparatus, such as a data set and the tape reader power pack. A removable rear panel provides access to the enclosure. If desirable, t_he feet of the stand may be bolted to the floor. (b) A copy holder with line guide (Figure 3). (c) Call control facilities, including buttons, indicator lamps, motor control relay, speaker, ringer, buzzer, and rotary, TOUCHTONE, and card dialers. (d) Low-paper alarm. (e) (b) To receive messages from line and print them on page copy with or without perforating tape. (c) To locally perforate messages in tape from keyboard for later transmission while making a printed page copy. An answer-back mechanism (see Figure 9) which will automatically identify a station by transmitting predetermined char= acter sequences. (f) Optional functions, including unshift on space and automatic carriage returnline feed. Page 3 SECTION 574-100-102 COPY HOLDER LlliE GUIDE ~ COVER---· NAMEPLATE i- - - - - - - S T A N D ) (LEFT FRONT VIEW) Figure 2 - Receive-Only (RO) Teletypewriter Set ) Page 4 ISS 1, SECTION 574-100-102 - -~ \ \l w------COPY HOLDER LINE GUIDE ; \ ) ~ COVER WINDOW LID ROTARY DIALER I ' TAPE READER ,,,.,_ NAMEPLATE CHAD CONTAINER ----STAND (LEFT FRONT VIEW) Figure 3 - Automatic Send-Receive (ASR) Teletypewriter Set Page 5 SECTION 574-100-102 ELAPSED TIME INDICATOR TAPE PUNCH I ." -·- .' J:l...jl" ' \ll'~' 'll' " ~~~l~ • - _::..~-- TAPE READER (FRONT VIEW) Figure _4 - Automatic Send-Receive (ASR) Teletypewriter Set (Without Cover) 3. COMPONENTS KEYBOARD (Figur es 6 and 7) KSR and ASR Keyboard A. 3.01 In conjunction with a distributor mechanism on the typing unit, the keyboard provides facilities for transmitting messages by the manual operation of a group of keys. It includes the following components: (c) A contact mechanism in which the codebar mechanism sets up the code combinations for conversion to start-stop signals by the distributor. Note: A second contact mechanism is found on the left side of keyboards equipped to detect errors by the " even parity" method. (See Paragraph 3.03(a).) (a) A spacebar and keys similar to those on a typewriter. (d) A frame and two side brackets which support the mechanisms and a cover which serves as a guide for the keys. (b) A codebar mechanism which converts the manual depression of the keys to mechanical positions corresponding to the proper code combinations. (e) A cable with connector which electrically interconnects the keyboard with the call control unit. Page 6 ) ISS 1, SECTION 574-100-102 3 .02 The 32 keyboard (Figure 6) has three rows of keys and generates a 5-level code that utilizes a letters-figures shift feature. To transmit the characters appearing on the lower part of keytops, the letters (LTRS) key must first be pressed. To transmit the characters on the upper part of the keytops, the figures (FIGS) key must first be pressed. Auxiliary keys such as line break (BREAK), repeat (REPT) , and answer-back actuation (HERE IS) are located at the upper right of the three rows. pulse whenever the number of marking pulses in a code combination is odd, and normally uses the eighth level for this purpose. The 33 keyboards which are not equipped with "even parity" will always have the eighth level marking. (b) The characters on the lower part of the keytops, including the numerals in the upper row, can be transmitted without the use of a shift operation. A SHIFT key is used to transmit the printing characters (such as "&, " "%," and "#") appearing on the upper part of the keytops. 3.03 The 33 keyboard (Figure 7) is similar to the 32 in appearance, but more closely resembles a typewriter keyboard. It has four rows of keys and generates an 8-level code. Note: When the SHIFT key is held down, all the keys which do not print characters which appear on the upper part of the keytops are mechanically locked and cannot be operated. This prevents transmission of false characters for those keys blocked. (a) Many 33 keyboards are equipped with an error detection feature called "even parity." Even parity provides for adding a INTERCONNECTING CABLES J) SU . TYPING UNIT '- SE BOARD (LEFT FRONT VIEW) Figure 5 - Keyboard Send-Receive (KSR) Teletypewriter Set (Without Cover) Page 7 SECTION 574-100-102 ACCESSORY KEYS COVER I ~ / ~ 1/ / FRAME .,,,,,,,,....,.,.,,.,/.,,., ., SIDE BRACKET SPACEBAR ! SIDE ----BRACKET 1· (LEFT FRONT VIEW) Figure 6 - 32 Keyboard (c) A control (CTRL) key is used to transmit the control functions (such as WRU, BELL, and TAB) which appear on the upper keytops. Note: When the CTRL key is held down on those keyboards equipped with "even parity," the sixth pulse code bar is shifted to its spacing position, and all keys with characters that normally have the no. 6 code element marking are mechanically locked and cannot be operated. This prevents the transmission of false characters for those keys blocked. Simfiltaneous use of both the CTRL and SHIFT keys allows access to special functions (such as "S5"). In every case, the SHIFT and/ or CTRL keys must be held down while the appropriate character key is depressed. (ct) Page 8 .(e) Because of the frequency of use, separate keys for certain functions, such as RE-TURN (carriage return) and LINE FEED are provided, and the CTRL key is not necessary to generate their code combinations. In the case of RE-TURN and LINE FEED, the CTRL key can be used in conjunction with either the RE-TURN or LINE FEED keys, but, for keyboards equipped with "even parity," parity is lost if the CTRL key is used. Note: In addition to the separate key provided, the "line feed" code combination can be generated by the simultaneous use of the CTRL and J keys. Likewise, the "carriage return" code combination can be generated by the simultaneous use of the CTRL and M keys. ) ) ISS 1, SECTION 574-100-102 CODEBAR MECHANISM SIDE BRACKET FRAME CONTACT MECHANISM SPACEBAR (LEFT FRONT VIEW) Figure 7 - 33 Keyboard B. RO Keyboard (Figure 2) 3.04 The RO keyboard has the frame and side brackets mentioned in 3.01 (d) above. However, its cover is blank and has no facilities for transmission described in 3.02 and 3.03. TYPING UNIT (Figures 8 and 9) 3.05 The typing unit receives start-stop signals from the call control unit and uses them to control mechanical motions which print the messages, perform functions, and, in the case of the ASR, perforate tape. (a) main shaft which receives motion from the drive parts and distributes it to the various mechanisms through three (four) internal expansion clutches. A Note: Friction feed typing units have three clutches. Sprocket feed typing units have four clutches. (b) A selector mechanism which translates the sta,rt-stop signals to corresponding mechanical arrangements that control a codebar mechanism. A range finder permits the selector to be adjusted so as to sample the signals at the most favorable time. (c) 3.06 The principal components of the typing unit include the following: A codebar mechanism which controls printing, functions, and, in the case of the ASR, tape perforation. Page 9 SECTION 574-100-102 PLATEN TYPEWHEEL RIBBON MECHANISM PRINTING CARRIAGE PLATEN KNOB RANGE FINDER \ SELECTOR MECHANISM \ J SPACING BELT . ,,. BASE CASTING DASHPOT CYLINDER (LEFT FRONT VIEW) ·-- ''I CARRIAGE RETURN SPRING SPACING MECHANISM Figure 8 - Typing Unit (Friction Feed) A printing carriage which prints the messages on the paper. The characters are embossed on the cylindrical surface of a typewheel. The typewheel is positioned rotationally and verti cally to select the proper characters , and a hammer drives it and an inked ribbon against the paper to effect printing. A ribbon mechanism feeds the ribbon and reverses its direction when one of its spools is depleted. (ct) A function mechanism which enables the typing unit to perform functions supplementary to printing. The standard functions are "space," "carriage return," "line feed , " "blank," "bell," and (for the 32 typing unit) "letters" (lower case) and "figures" (upper case). Note: In addition, sprocket feed typing units have the function "form-out." ) (f) A paper feed mechanism which positions paper or forms vertically so that the characters are properly located in lines. A platen feeds the paper or forms. A knob permits manual feeding. The mechanism can be adjusted for single or double line feed. (e) Page 10 (g) A spacing mechanism which positions the carriage so that the characters are properly located hor'izontally on the paper. ) ISS 1, SECTION 574-100-102 LINE FEED MECHANISM PLATEN DISTRIBUTO MECHANISM ~ ( : I ::,:;, .. ANSWER-BACK MECHANISM (LEFT REAR VIEW) Figure 9 - Typing Unit (Sprocket Feed) Note: An answer-back mechanism, which is ah optional accessory, often is used in conjunction with the distributor. It will automatically transmit.a sequence of characters for station identification. It may be coded to transmit any sequence of up to 20 characters and may be actuated locally or remotely. It moves the carriage, which rides on rollers, by a spacing belt. It returns the carriage to the left margin by a carriage return spring. The carriage is pneumatically stopped without shock by a piston and dashpot cylinder arrangement. (h) A disc and brush type distributor mechanism which converts the positions of the keyboard contacts (3.01 (c)) to star.tstop signals for application to transmission facilities. (i) A base casting which provides mounting facilities for the mechanisms. Page 11 SECTION 574-100-102 Two cables with connectors which provide interconnection wit h the call control (j) unit. right end of the shaft transfers the rotary motion generated by the motor to a set of drive parts which consist of a gear-pulley and motor belt. MOTOR AND DRIVE PARTS (Figure 10) 3.08 3 .07 Mechanical motion for the 32 KSR and RO is ordinarily provided by a 2-pole, single-phase synchronous motor which operates from a 115 volt ac source and develops 25 millihorsepower at 3600 rpm. It consists basically of a housing, end bells , a wound stator, and a squirrel-cage rotor with shaft which rides on ball bearings. Cooling · is provided by three fans - two within the end bells and one at the left end of the shaft. The motor is mount ed by rubber vibration r ·mts which are clamped in a cradle formed L. the typing unit's base casting. A start capacitor , a current-operated start relay, and a run capacitor are mounted on the base casting to the left of the motor. A pinion on the HOUSING The motor ordinarily used to provide motion for the 32 ASR and all 33 Teletypewriter Sets is similar to the one described above, except that it develops 33 millihorsepower, is equipped with sleeve bearings, and is not a capacitor-run motor. CALL CONTROL UNIT (Figures 11 through 13) 3.09 The call control units couple the equipment to the transmission facilities and serve as an area of convergence for its circuitry. Two typical assemblies are shown in Figures 12 and 13. 3.10 ) A sheet metal plate secured to the subbase provides mounting facilities. FAN START RELAY ) ~~ ·"It I .}. • .' I_ • ---- ~ ; ~- GEAR PULLEY l-- ~ -f--==---'t-- - - _ -- Ll CLAMP AND RUBBER MOUNT END BELLS CLAMP AND RUBBER MOUNT Figure 10 - Motor and Drive Parts Page 12 (REAR VIEW) ISS 1, SECTION 574-100-102 CARDS I CARD DIALER TOUCH-TONE DIALER (RIGHT FRONT VIEW) Figure 11- Keyboard Send-Receive (KSR) Teletypewriter Set with Card and Touch-Tone Dialers Page 13 SECTION 574-100-102 ~ CIRCUIT CARD I FUSE OLDERS SELECTOR MAGNET DRNER CAPACITOR ' , \ I' PLATE (LEFT FRONT VIEW) Figure 12 - Typical Call Control Unit 3.11 Call control units are available in variations that incorporate certain combinations of the following features: A selector magnet driver which couples the equipment to the transmission facilities and repeats the line signals in a form that will efficiently operate the selector mechanism on the typing unit. It includes a transistorized circuit card, a transformer, a rectifier, and a capacitor filter. (d) A small speaker with volume control for monitoring dial tone, ringing, and busy signals on telephone networks. It is driven by a transistorized amplifier card. (a) (e) Pushbuttons and lamps to aid in initiating, accepting, controlling, and terminating calls. (f) A motor control relay which will automatically turn the motor on and off. Rotary, TOUCH-TONE and/or card dialers for making connections with other stations through dial switching facilities (Figures 3 and 11) . (g) Fuses which protect the circuitry of the equipment. (h) Automatic answering circuitry. (c) (i) Interconnecting facilities, including receptacles , cabl~s, and a terminal board. (b) A ringer or buzzer which provides an audible indication of incoming calls. Page 14 ) ISS 1, SECTION 574-100-102 FUSE HOLDERS CIRCUIT CARD I ----. l , , CAPACITOR CONTROL KNOB (RIGHT FRONT VIEW) Figure 13 - Keyboard Send-Receive (KSR) Teletypewriter Set with Call Control Unit COVER AND SUBBASE (Figures 2 and 5) TAPE READER (Figures 3 and 4) 3.12 3.14 A plastic cover provides a decorative and protective enclosure of the typing unit, keyboard, and call control unit. A lid, which is spring detented in its open position, may be raised to gain access to the typing unit for changing ribbon or installing paper or forms. A window permits viewing the copy and provides a cutting edge for tearing the paper or forms. Depressions at the rear of the cover hold the paper roll spindle. Mounting slots are provided for a copy holder. A nameplate is mounted at the front. 3.13 The cover is mounted at its outer edges on a subbase casting which serves as a foundation for the keyboard, typing unit, and call control unit. Rubber vibration isolators support the typing unit. The tape reader, in conjunction with the distributor mechanism on the typing unit, provides facilities for transmitting messages from perforated tape. 3.15 The complete tape reader package includes the following components: (a) A tape-sensing mechanism which converts code holes in the tape to corresponding positions in a set of contact springs. The holes are sensed by pins which operate the contact springs. The positions of the contact springs are converted to start-stop signals by the distributor mechanism. (b) A feed mechanism which advances the tape after a combination of code holes has been read. A feed pawl and ratchet Page 15 SECTION 574-100-102 arrangement rotates a feed wheel whose pins engage feed holes in the tape. The tape feeds from rear to front and is held down on the sensing pins and feed wheel by a hinged tape lid which may be opened to facilitate tape threading. (c) A feed magnet and armature arrangement which supplies motion for the sensing and feed mechanisms. It is pulsed by a contact on the distributor mechanism. TAPE PUNCH (Figures 3 and 4) 3.16 The tape punch, in conjunction with the selector and codebar mechanisms on the typing unit, provides facilities for perforating messages in paper tape. The messages are received as start-stop signals from the call control unit and are converted to mechanical motions that punch corresponding code holes in the tape. 3.17 (d) A magnet-controlled clutch-trip mechanism which actuates the distributor mechanism. It is mounted above the distributor on the typing unit. '.e) A power pack, mounted in the enclosure of the stand, which provides current rectification for the feed magnet. It is protected by a metal housing. (f) A cable which interconnects the tape reader with the power pack, the magnet pulsing contact, and the call control unit. Tape-out and tight-tape mechanisms which will stop the tape reader when it runs out of tape or when the tape becomes taut. The punch includes the following components: (a) A drive mechanism which receives motion from the function rocker shaft on the typing unit and distributes it to other mechanisms. (b) An intelligence-transfer mechanism which receives intelligence from the codebar mechanism on the typing unit. (c) A tape-punching mechanism which, under the control of the intelligence-transfer mechanism, perforates feed and code holes in the tape by means of punch pins located in a holder. (g) (h) A free-wheeling mechanism which disengages the feed wheel and tape-out mechanisms and permits the tape to be moved freely through the tape reader. (d) A tape feed and guide mechanism that advances the tape by means of rollers and a feed pawl and ratchet arrangement. (e) A base casting which is attached to the typing unit base and provides mounting facilities for the various mechanisms. (f) (i) A frame which is mounted on the typing unit's subbase and provides mounting facilities for the other mechanisms, excluding the power pack and clutch-trip mechanism. (j) A base casting and· plastic cover which provide a protective and decorative enclosure for the tape reader. (g) A pan casting and 2-piece plastic cover which provides a protective and decorative enclosure for the tape punch. (h) A metallic chad container which collects the paper (chad) punched out by punch pins. (k) Page 16 \ / 3. 18 The auxiliary ASR power supply is mounted in the enclosure of the stand (2.11 (a)). It is used in the off-line mode, to provide 115 volts on the tape reader, keyboard, answer-back, and distributor contacts only when a tape reader is used. When the tape reader is not used, a dummy plug with a jumper wire is inserted in position "R2" at the rear of the call control unit. A supply reel which accommodates a roll of blank tape. The following four pushbuttons are provided: (a) ON - Turns the tape punch on. (b) OFF - Turns the tape punch off. (c) REL (Release) - Releases the tape feed and guide mechanism so that tape can be easily removed from the tape punch. I _/ ISS 1, SECTION 574-100-102 DIAL SWITCHING FACILITIES TRANSMISSION FACILITIES .,,, .,,, ,,. "' (TELEPHONE OR TELEGRAPH NETWORKS) Figure. 14 - Typical Applications (d) 4. B. SP. (Backspace) - Backspaces tape one combination of code holes. TYPICAL APPLICATIONS (Figure 14) 4.01 The following is a brief description of how 32 or 33 Teletypewriter Sets, equipped with call control and answer-back features, may be used in a typical communication system. (See Figure 14.) When a call is to be made , an operator uses the controls on his Teletypewriter Set to gain access to the system's switching and transmission facilities , which may be dial telephone or telegraph networks. He then dials the number of the called station. 4.02 The switching center selects the proper station and signals an incoming call there by visual and/ or audible indicators. Using the controls on his Teletypewriter Set, the operator at the called station completes the connection and conditions the equipment so that communication can proceed in either direction, a fact that is indicated visually and/ or audibly at the calling station. Note: Variations of call controlfeatures provide unattended reception of calls. 4.03 Ordinarily the stations then identify themselves by the answer-back feature. The operator at the calling station can then type the message on his keyboard, or, if he has the ASR, can send it from perforated tape. In either case the Teletypewriter Set translates the message to de sequential start-stop s ignals which it applies to the transmission facilities. The Teletypewriter Sets at both the sending and receiving stations receive the signals and translate them to mechanical motions which print the message on page copy or forms and/ or , in the case of the ASR, perforate it in tape. If Page 17 SECTION 574-100-102 telephone networks are used, the de start-stop signals are converted to tone frequencies for transmission and reconverted to de start-stop signals for reception. 4.04 Finally, the operator at either station can terminate the call and return the Teletypewriter Sets to their idle condition by his controls. 5. Speeds . . . . . . Transmission Codes 5.05 33 Sets . . . 8-level start-stop signals with 11-unit transmission pattern (a) Dimensions and Weight (Approximate) KSR Width Depth Height Weight. (b) Long Telegraph Loops . . 0.015 to 0.070 ampere at 48-to 240-volts de inductive Short Telegraph Loops . . 0.058 to 0.072 ampere at 16-to 22-volts de resistive minute, OPM = 32 Sets . . . 5-level start-stop signals with 7 .5-unit transmission pattern 5.03 Power Requirements . . 115-volts ac ±10% 60 cps ±0.45 cycle, single phase Signal Line Current . . . . . 0.020 or 0.060 ampere Nominal Input to Selector. . . 0.500 ampere at 20-volts de . 60 wpm (364 opm), 66 wpm (400 opm), 100 wpm (600 opm) Note: WPM = Words per riµerations per minute. 5.02 Electrical / Operating Margins-All signal contacts and Distributor: TECHNICAL DATA 5.01 5.04 18-5/8 inches . 18-1/2 inches 8-3/8 inches . . 40 pounds RO Width, depth and height same as KSR in 5.03(a) above ) Printing and Paper or Form Handling Feed Friction or Sprocket: six lines per inch, adjustable for single or double line feed. Paper or Form Friction Feed: 8-1/2 inches wide, max 5-inch diameter roll. Sprocket Feed: 8-1/2 inches wide; 7-, 8-1/2- 9- 10- 11- and 12- inch ' ' or ' multiples ' form lengths of 1/3 or 1/2 thereof. Characters and Line Friction Feed: 10 characters per inch, max 74 character line Sprocket Feed: 10 characters per inch, max 72 character line Weight . . . . . . . . . . . . . 39 pounds (c) ASR Width Depth Height Weight. (d) . . 22 inches 18-1/2 inches 8-3/8 inches . . 44 pounds Legible Copies: Friction Feed: original and one copy Sprocket Feed: original and two copies 5.06 Motor (TP181870-ordinarily used on 32 ASR and all 33 Sets) Stand Width . Height . Depth at Top of Enclosure . Depth of Bottom of Enclosure . . Length of Feet . Weight. Page 18 17-3/4 inches 24-1/2 inches . . . 8 inches . 6-1/2 inches 17 -3/ 4 inches . . 12 pounds Type . . . . . Synchronous, capacitor start Input . . . . . .115-volts ac ±10%, 60 cps ±0.45 cycle, single phase Input Current . . . . . . 2 amperes 33 millihorsepower Output. . . . . Speed . . . . . 3600 rpm Temperature Rating . 50° C continuous Power Factor. . . . . . . . . . . 0.40 ) ISS 1, SECTION 574-100-102 5.07 Output . . . . Min. 137-volts de@ 0.160 ampere Low Voltage (Rectifier for Relay*): Input . . . . . . . . . . . . . 48-volts ac Output . . . • . . . . . . 32 ± 8-volts de Heat Dissipation with Tape Reader Operating . . . . . . . 17 watts Motor (TP181861-ordinarily used on 32 R/O and KSR) Same as 5.06 above except as follows: Type . . . Synchronous, capacitor start and run Input Current Output . . . . Power Factor • . . . . 0.85 ampere . . 25 millihorsepower . . . . . . . . . 0.70 *Applicable to tape readers equipped with automatic reader control . CAUTION: HIGH VOLTAGE PERSISTS 10 SECONDS AFTER POWER REMOVED. ,,,--_ 5.08 Tape Reader (c) Feed Magnet (a) Dimensions and Weight (Approxima,te) Power Dissipation . • . . . . 2-1/4 watts Nominal Attract Time . . . . 8-11 milliseconds at 0.220 ampere Nominal Release Time . . . . 7-10 milliseconds Feeding and Sensing Portion Width. Depth. Height Weight 3-1/2 inches . . . 4 inches 3-1/2 inches . . 2 pounds 5.09 Tape Punch (a) Dimensions and Weight {Approximate) Power Pack Width. Depth. Height Weight 6-1/ 4 inches 2-1/2 inches 2-3/4 inches . . . 1 pound Width. Height. Depth. Weight . 3-1/2 inches . 7-1/2 inches .13-1/4 inches . 1-1/2 pounds {b) Tape Specifications (b) Power Pack High Voltage: Input . . . . 115-volts ac (see "Power Requirements" in par. 5.04) Levels . . . . . . 5-or 8-level Width - (5-level) . . . 11/16 inch Width - (8-level) . . . . . 1 inch Code Combinations per inch . . . . . . 10 Feed Hole Diameter . . . . . 0.0465 inch Page 19 19 Pages TELETYPE CORPORATION Skokie, Illinois, U.S.A. SECTION 574-100-201TC Issue 3, July, 1964 32 AND 33 TELETYPEWRITER SET INSTALLATION CONTENTS 1. PAGE 1. GE_NERAL GENERAL . 1 UNPACKING. 1 PREPARATION FOR INSTALLATION 2 INSTALLATION 6 MOUNTING TYPING UNIT ON STAND • . . • • • • . . 6 CODING ANSWER-BACK DRUM. 6 This section is reissued _as a general revision. Because of this, marginal arrows ordinarily used to indicate changes have been omitted. ADJUSTMENTS 8 1. 03 PLACEMENT . . 8 ELECTRICAL CONNECTION 9 FINAL ASSEMBLY 9 GENERAL . . . . . . . 9 RIBBON INSTALLATION 9 PAPER OR FORM INSTALLATION . 11 A. B. Friction Feed • Sprocket Feed . 11 11 OPTIONAL FEATURES 12 A. B. C. D. Copy Holder . . Hum Squelch . . Busy Circuit . . Hand Receiver • 12 13 14 14 5. TAPE READER . . 15 6. POWER PACK ASSEMBLY 15 7. TAPE PUNCH . . . . . . . 16 2. 3. 1.01 This section provides instructions for unpacking, installing, connecting, and preparing the 32 and 33 Teletypewriter Set for use. A 115-volt power source and signalline current and leads must be furnished by the customer. See the appropriate description section for detailed power and signal-line requirements. 1.02 References to "left," "right," "front," or "rear," etc, consider the Teletypewriter Set to be viewed from a position where the typing unit carriage faces up and the typing unit selector mechanism is located to the viewer's left. UNPACKING 1.04 4. The Teletypewriter Set is packed in one carton. Observe all caution and instruction labels on the carton before breaking the seals. Remove the upper filler pads. Caretully take out the typing unit to avoid marring or otherwise damaging the plastic cover. Remove the remaining carton fillers and take out the stand (if used). 1.05 The typing unit and subbase are mounted on a wooden shipping pallet by seven screws. Four of the screws are no. 14Z selftapping screws that secure the subbase to the pallet. The remaining three are standard machine screws that pass through aluminum bushings into tapped holes in the typing unit's base casting. Since the typing unit floats on rubber mounts, it is secured with separate screws. Tilt the mounted typing unit and take out the screw in the countersunk hole first. Loosen the C 1962, 1963, and 1964 by Teletype Corporation All rights reserved Printed in U. S. A. Page 1 S'ECTION 574-100-201 PAPER ROLL SPINDLE LID AND WINDOW MOUNTING SCREWS (3) : ) SCREWS (4) (LEFT FRONT VIEW) Figure 1 - Cover Mounting ) remaining six screws slightly. Return the typing unit to its upright position. Slide it to the edge of the bench and remove the six screws by hand. The typing unit can now be lifted from the pallet. Discard the seven mounting screws and the three aluminum bushings. ,UTION: DO NOT TILT THE TYPING UNIT AFTER IT HAS BEEN REMOVED FROM THE PALLET. THE TYPING UNIT FLOATS ON RUBBER ISOLATORS AND MAY PULL LOOSE IF IT IS TILTED. PREPARATION FOR INSTALLATION Remove the tape from across the top of the cover and take out the cables, platen knob, and paper spindle from the paper recess. Unwrap the parts. expose four cover mounting screws. Remove these screws and three mounting screws from the rear of the cover. Gently lift the cover from the subbase. Note: On Automatic Send-Receive (ASR) Teletypewriter Sets, remove the screw from the left rear corner of the tape reader cover before gently lifting the ASR cover from the subbase. 1.08 Remove the twist-tie on the left side that holds the carriage, the tissue paper below it that retains spacing pawls, and the two yellow clips. from under the hooks of the function levers. 1. 06 1. 07 Remove the bezel, if used, from the call control unit by removing two mounting screws. Remove the volume control knob, if used, or the power switch rotary knob, if used, by pulling frontward. Remove the nameplate by pulling it down and out (Figure 1). This will Page 2 1.09 If a stand is used, place it in an uncrowded area. Remove two mounting screws and take off the rear panel. Remove the copy holder, if used, from inside the stand. Take the hardware out of the bag tied to the stand. 1.10 rack. Using the screws supplied with the data set, if used, fasten the set to the relay ) ISS 3, SECTION 574-100-201 REAR MOUNTING SCREWS (2) FRONT MOUNTING SCREWS (2) STAND (LEFT FRONT VIEW) LEVELING SCREWS (2) FOR BOLTED INSTALLATION ........,;:~;-----0. 359 INCH DIAMETER INSTALL LAG BOLTS (2) HOLES FOR FROM INSIDE REAR OF STAND RUBBER BUMPERS Figure 2 - Stand Leveling and Anchoring and Assembly of Subbase with Typing Unit to stand Page 3 SECTION 574-100- 201 NOT US ED ANSWER-BACK DRUM / LEVELS LETTERS FIGURES FIGURES TWX & TELEX TWX TELEX A B C D E F G H I J K L M N 0 t + 3 1/4 t 8,. 8,. 8 *8 3 ' BELL 1/2 ( 3/4 • 7/ 8 .) 9 0 I 9 0 I 4 4 BEL L I p Q R s -? .. - 5/ s WRU ' T 5 5 u 7 7 :Ya 2 I 6 ; 2 I 6 II II V w X y z CARRIAGE RETURN LINE FEED LETTERS SHIF T FIGURES SHIF T SPACE OPER OPER OPER OPER OPER OPER - •• ••••• ••n •• •••• •• •• •• •••••••••••••••• •••• • • • • • • • •••• ••••• • • • •• •••••• •• • ••• •••••• •• • •• •••• •• • •• • • ■■ D ■ □ ■ '7 ■■□□□ ■ ■ ■□■ □ ■ ■ □ ■ JO □ ■□ □ ■□ ■□ ■ ■ •□ DD ■■ CHARACTER FEED ■■D □□ SUPPRESSION RATCHET ■ □ DD □ STOP 0 ■ ■□ ■ CAM D D ■□ ■ ■ ■□□■■ (REAR VIEW) D■ ■ ■□ ■ ■ ■□ ■ ■ LJ □ ■□ ■ D□□ ROWS ■I ■■□ □ 7 6 5 ■ ■ □ □ •• •D• •••••• • •••••• D • •• •• ••••••• • •• •••••• • •• •• ••••• ••• •• • ••• • • •• ••••• • ■ •■ • •• ••••• ••• •••••••• •• ••••• •• •• • • •• • • • • ■ r, ROW 6 RO W ST RO WS 17 ROWS ST 811 ■ ROWS 6.13. a 20 ■ ROWS ST. 7.814 CHARACT ER SUPPRESSION STOP CAM F EED RATCHET ■■ ■ ■ ■ ■ ■ DD ■□ ■ □□□ ■ ■ ■□ □□ ■ D □ ■□ ■□ ■ ■ LJ Li ■ ■□ ■ ■ ■ ■ ■ ■ D ■ ■□■ ■ ■ ■■ □■ DD□ D ■ ■□ ■ ■ ■□ ■ ■ □ l I ■ sa ■ ■ ■ ■□ ■ BLANK I CYCL E I CYCL E 2 CYCLE 2 CYCLE 3 CYCLE 3 CYCLE CODE LEVELS 43 21 5 ■ ■ D ■■ ■ ■■ D ■ ■ ■ ■■ □ ■ ■ ■ ■ D■ ■■ D■ D ■■■ ■■ ■■ ■ .' D Figure 3 - Coding of Answer-Back Drum Page 4 1 11 ST 12 TP95368 SCREWDRIVER (LEFT SIDE VIEW) ■ LEAVE TINE J 0 REMOVE TINE 32 Teletypewriter Set ) ISS 3, SECTION 574-100-201 ANSWER-BACK DRUM CODE LEVELS 33 \ 8 7 6 5 4 3 2 I NULL D ■ ■ ■ ■ ■ ■ ■■■ SOM D ■ ■ ■ ■ ■ ■ ■ ■D EOA D ■ ■ ■■ D EOM D ■ ■ ■ ■ ■■ D D EOT D ■■ ■ ■■ D ■ ■ WRU D ■■ ■ □ □ RU DD■ D ■■ ■■ BELL D ■■ ■ ■■ ■ ■ D D □ FEo D ■■■■■D ■ HT D ■■ ■ ■ ■ ■□ ■ D LF D ■■ ■ ■ ■ D D ■ VT D ■■ ■ ■ ■□ ■ D D D ■■ ■ ■■ ■ D D ■ FF CR D ■■ ■□ D ■ D so D ■ ■ ■ ■□ D D ■ SI D ■ ■□ D D D DCo D D ■ ■■ XON D D■ ■■ D RION D ■■ ■ ■