TELETYPE MODEL 14 FAMILY

TELETYPE MODEL 14 FAMILY

The Teletype Corp Model 14 family encompasses a variety of models, spanning many years and several company names. Production was from 1915 to 1925 under the Morkrum Company, from 1925 to 1929 under Morkrum-Kleinschmidt, and from 1929 onwards under the Teletype name.

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*Model 14-TD (aka M14-XD) Transmitter-Distributor*
	Standard Model: 14-TD Military Models: (see below) Design Relatives: M20-TD is 6-level version Manufactured: 19??-19?? Units Produced: ?? Units Remaining: ?? (estimated) Dimensions (inches): 8W x 9H x 16L Weight (pounds): 28 Keyboard: None Code: 5-level baudot (ustty or ita2) at 60 wpm (45.5 baud) Interface: 60-mA current loop (@120VDC typical) Motors: 115-VAC Synchronous, or Governed Options: End-of-tape-stop; Break-lock; Tape-feed-suppression; Tape-guide-wire; ??
The Teletype Corp Model 14-TD Transmitter-Distributor reads code perforations on a paper tape, and transmits the code to receiving stations. The transmit contacts can be used directly on a current loop, or may key a radio transmitter. The 14-TD uses 5-unit baudot code, punched into 11/16-inch paper tape. The five code holes are sensed in parallel by a row of pins, and the rotating distributor disc serializes the code for transmission. Depending on the type of hinged tape cover used, the unit may read tapes that are chadded (chads punched out), chadless (C-shaped perfs, for typing on top), or both. There was a later version, the Model 20-TD, that used the 6-unit TTS Teletypesetting code. The six-unit tape is 7/8-inch??... The basic Teletype designations of the M14-TD are XD82 and XD86, and suffix letters denote model variations (eg: XD82FS, XD82FU, XD86AJ, XD86EQ, and XD86FR). Military versions include the TT-21/FG, TT-25/FG, TT-26/FG, and TT-52/FG. M14-TD units are normally integrated into larger systems, such as the M19 Set (which also includes a perforating M15 page printer), the AN/TGC-3 (aka 132 and 133A2) sets (which also include an M14-ROTR), or the military TG-26-A and TG-27-A sets (which also include an M14-KTR) Synchronous motors operate from 115-VAC. Governed motors can operate from 115-VDC, or unregulated 25-to-60-cycle 115VAC. For 60-wpm (368-opm) use, 1800-rpm motors were used, and for compatibility with British Creed equipment, 2102-rpm motors (404-opm) were available. Two-channel (dual) M14-TD units, with Signal Corps military designation TT-26/FG, have manufacturer codes XD91 and XD93. These TDs use time-division multiplexing by providing extra segments on the distributor disc -- there are 15 segments instead of the normal 7 segments. Other versions, called "Receiving Transmitter-Distributors," look like standard TDs, but have the 15-segment distributor disc like the dual TD, allowing it to transmit on one channel, leaving the other channel open for reception. These units have designations XD79, XD95, and XD100, with suffixes EZ, EY, EX, and GW, defining motor options etc. Military versions of these include TT-12/FGQ-1 and TT-13/FGQ-1. (need more poop here)...

This is my crusty untouched M14-TD. More pics here.

Chuck Swiger has a rare dual M14-TD.

One variation of the dual TD has the distributor segments split in the middle, with one half connected to one set of reading contacts and the other half connected to the other set. This was used, going back to World War II, as a cheap two-channel time-division multiplex. You simply adjusted the range finders on the two printers so that one selects early, in the middle of the first half of the pulse, and the other selects late, in the middle of the second half [Jim Haynes].

A switch selects transmitters A and B, or A-only.

Note the extra segments on the distributor disc of the dual TD. This unit also has the governed DC motor -- the black and white stripes on the motor flywheel are used to adjust the speed.

Under the bottom plate of the dual TD.


*Model 14-TP Tape Printer*
	Standard Model: 14-TP ?? Military Model: ?? Design Relatives: ?? Manufactured: 1925-1955 ?? Units Produced: ?? Units Remaining: ?? (estimated) Dimensions (inches): ?? Weight (pounds): ?? Keyboard: 3-row with spring-cushioned green keycaps Code: 5-level baudot (ustty or ita2) at 60 wpm (45.5 baud) Interface: 60-mA current loop (@120VDC typical) Full- or Half-Duplex; Motors: 115-VAC Synchronous, or Governed Options: ??
(Note: I am using M14-TP as a model designation, until informed of a correction) The Teletype Corp Model 14-TP Tape Printer... (need more poop here)...

M14-TP machines used by Bell Telephone TWX operators in the late fifties.


*Model 14-RPE Non-Typing Reperforator*
	Standard Model: 14-RPE ?? Military Model: ?? Design Relatives: ?? Manufactured: 1928-19?? Units Produced: ?? Units Remaining: ?? (estimated) Dimensions (inches): ?? Weight (pounds): ?? Keyboard: None Code: 5-level baudot (ustty or ita2) at 60 wpm (45.5 baud) Interface: 60-mA current loop (@120VDC typical) Full- or Half-Duplex; Motors: 115-VAC Synchronous, or Governed Options: ??
(Note: I am using M14-RPE as a model designation, until informed of a correction) The Teletype Corp Model 14-RPE Non-Typing Reperforator, is also called the "Single-Magnet" Non-Typing Reperforator... (need more poop here)...

What does "single-magnet" mean? I see a dual-coil solenoid.


*Model 14-ROTR Receive-Only Typing Reperforator*
	Standard Model: 14-ROTR ?? Military Model: ?? Design Relatives: ?? Manufactured: 1940-1958 ?? Units Produced: ?? Units Remaining: ?? (estimated) Dimensions (inches): ?? Weight (pounds): ?? Keyboard: None Code: 5-level baudot (ustty or ita2) at 60 wpm (45.5 baud) Interface: 60-mA current loop (@120VDC typical) Full- or Half-Duplex; Motors: 115-VAC Synchronous, or Governed Options: ??
(Note: I am using M14-ROTR as a model designation, until informed of a correction) The Teletype Corp 14-ROTR Receive-Only Typing Reperforator... (need more poop here)...

xxx.


*Model 14-KTR Keyboard Typing Reperforator*
	Standard Model: 14-KTR ?? Military Model: ?? Design Relatives: ?? Manufactured: 1940-1958 ?? Units Produced: ?? Units Remaining: ?? (estimated) Dimensions (inches): ?? Weight (pounds): ?? Keyboard: 3-row with spring-cushioned green keycaps Code: 5-level baudot (ustty or ita2) at 60 wpm (45.5 baud) Interface: 60-mA current loop (@120VDC typical) Full- or Half-Duplex; Motors: 115-VAC Synchronous, or Governed Options: ??
(Note: I am using M14-KTR as a model designation, until informed of a correction) The Teletype Corp 14-KTR Keyboard Typing Reperforator... (need more poop here)...

This is my M14-KTR. More pics here.