INTRODUCTION to Teletypesetter Operating Unit by Fairchild Teletypesetter Corp.
The TOU 75, Teletypesetter Operating Unit, is
designed to operate all models of modern high output linecasting
machines (Linotype Elektron, Comet and Intertype Monarch) at or
beyond their rated capacity. A six-unit fully perforated tape is
the medium of control.
Functionally the operating unit performs as
follows: operates the required keylevers and the assembling
elevator; controls the upper and lower rail (duplex rail)
position; provides for the necessary delay of tape feeding during
the positioning of the duplex rail; Automatically recognizes a
repeat character or digit and provides a one-cycle delay between
each repeated character; operates electrical contacts to provide
regulated pulses for the control of auxiliary circuits; and
provides an electrically operated safety feature for idling the
machine in case the perforated tape ends, becomes taut or in the
event that certain conditions arise in the linecasting machine.
The perforator operator may justify certain short lines by back spacing the tape and perforating the O
-Code (thin-space) in each space band (3-Code) perforation to increase the spacing between words.
When the 0-3 combination is sensed by the operating unit, the add-thin space functions to drop the
space band and the thin space matrices in sequence.
The code combination for the various functions and characters are shown in the figure below.
An electrical control is incorporated in the Operating Unit to provide control of assembly when
spacebands are delivered. It may be adjusted for optimum control of the individual linecasting machine.
In addition, an electrical tape stop mechanism is incorporated. This mechanism may be wired to a
chosen code lever contact and will idle the machine when the code for the lever is sensed.
A reset button for restarting the machine is provided.
Bottom view of the TOU directly under
the Selector Assembly (above). Sorry
for the poor quality photo. I’ll try to
explain what happens under here.
Contact Code Bars: These code bars
are pressed downward with every cycle
of the TOU allowing the Code Bar Extensions (see above picture of
Repeat Character Delay Assembly) to
move freely. If one of the 7 Contact
Code Bars teeth combination matches
up with the code bar extensions notches the following functions
(electrical or mechanical) take place.
Contact Code Bar:
1. Upper Magazine
2. Lower Magazine
3. Quad left signal
4. Quad center signal (hydraquadder)
5. Stop code – Stops TOU reading tape
6. Upper/Lower Rail (italic)
7. Add Thin Space
(spaceband + thinspace)
To obtain a quad right signal the TTS Perforator operator inserted a Quad Left Code + Quad Center Code.
This combination would cause the Mergenthaler Hydraquadder and Star Parts Electric Quadder to Quad
Intertype never had an electric quadder that I’m aware of.
On the two ACE Electron 4 Magazine Mixer
Machines at Wisconsin Cuneo Press, Milwaukee, WI
. there was a Super Shift Code that would send
control signals to a panel of relays that allowed us
to move magazines to pair mag. 1 & 2; 2 & 3 and 3 &
4. We also had the mold selection feature that
turned the mold disk to use mold: 1, 2, 3 or 4. The
auto ejector was pre-programmed with pins for
different length lines. Mold sensor relays would
auto control setting of knife block. No measure control. We chose to set the vise jaws to the longest measure required.
When setting shorter lines (slugs) we used ½ pica and 1 pica blank space matrices in magazine channels
60 and 46 respectively to fill the space.
For yellow page telephone directory work it required 2 different length lines. This eliminated the need for
cutting lines (ad makeup - floor saw) to fit the space.
All lines for ads were on same galley and set to proper length. It worked great!
The Blocking Bar operation is quite important. It’s got
everything to do with repeat characters. Like the word
“look” with double “o”
The Blocking Arm Latch and
Repeat Blocking Arm are almost one in the same.
The Repeat Blocking Arm moves to the left and right for
each character in a line of type.
If the tape reading selector pins recognize the same code in
succession (excluding a rub out – 012345) the Repeat Blocking
Arm does not move which allows the Blocking Arm Latch
to hook onto the Tape Feed Blocking Arm Upper Extension and prevents the paper tape from advancing
beyond the second “o.” Next cycle of TOU and the “o” will be selected, the tape will advance to the next
punched code in the paper tape.
After reading the description (above)
how the repeat character function
works I thought it best that I include a
picture of just where the Blocking Arm
Latch hooks up to what arm?
That’s why most manuals are marked
with numerous greasy finger prints.
You’re reading things on page #24
where the text refers to something
that isn’t pictured on that page. The
search begins back/forth thru pages
until you come upon a recognized word or picture on page #34.
Top View - left - does not show the latch plate that
closes over paper tape – that holds paper tape securely
when reading pins rise up to read punched code holes in tape.
See Yellow Square around punched holes. Small red
letters above the punched holes = “boloney!” —
n : pretentious or silly talk or writing
This is the pin (to left) that reads a hole in the paper tape.
There are 6 of these levers to
read the 0-1-2-3-4-5 code holes punched in the paper tape. This
info is transferred to the selector
levers which move to the right when the pin recognizes a hole
in the tape. In the old TTS language from the 1930 era,
Teletypesetter Corporation from
Chigago, Il, this reading a hole in
the tape was called a “mark.” No hole in the tape was called a
All those marks and spaces cause the Transfer levers (6 of them) to pivot on a stationary
rod which causes the code bar extensions to move left or right.
The code bar extensions are connected to 6 code bars
located in the TOU which hangs on the keyboard and extends
toward the base of the linecasting machine.
The 6 transfer levers are depressed downward, allowing
the selector levers to swing left/right freely, at the moment
the selector lever pins read the
holes in the tape (on top plate). At the precise degree in the cycle the transfer levers are allowed to rise
and take a reading from the 6 selector levers. (see up/down red arrows)
When the round bottom part of the 6 transfer levers in slot on 6 Code Bar Extensions (large red arrow to
left) get moved to left/right (mark or space) Remember, the code bar extensions are connected to the
code bars located in the TOU which hangs on the keyboard. Those code bars reach from the right side to
the left side of the keyboard. When the codes in the paper tape are read and a lower case “b” is needed
the code bars will be positioned to allow the correct push bar to be selected which in turn moves a bell
crank lever to tilt forward and depress a keylever extension. That keylever will cause the lower case “b”
cam to fall down and ride on the keyboard cam rubber roll for one revolution. This will cause a reed (long
thin piece of metal) to push upward and select a lower case “b” from the magazine (holds the matrices)
on the hotmetal machine. The matrice falls out of the magazine onto an assembly belt and is delivered
into the assembling elevator.
If no matrice (matrix) falls out of the magazine there is another attachment that all teletype setter operated
machines had. It was called a Mat Detector. I will create a page for that subject by itself. I don’t have any
pictures of a Shaftstall Mat Detector and would appreciate any help I can get with some pictures. Their
address was Shaffstall Equpt. Inc., Indianapolis, In.
Note: I don’t have a manual on theory of operation from the time a pin or pins select read holes in the paper tape, then X-mit choices to the keyboard causing a matrice to fall into the assembling elevator. I’m using my own words while looking at the adjustment manual Bulletin 75B — Adjustment and Lubrication for the TOU 75 Operating Unit. jer
If some viewer sees
an error, let me know, and I’ll correct the words etc.
Upper - Lower Rail (Flap - NO Flap) Selector or Lateral Rail,
all words refer to the same levers.
Located on left side of keyboard, this mechanism is
attached to the Assembling Elevator.
The front plate of the assembling elevator has to
be rebuilt with a different type of rail which moves to
right — causing succeeding matrices to align the auxiliary matrice character to be aligned for casting.
When paper tape sends upper rail code to TOU, lateral rail moves right. Lower rail code will move lateral
rail to left.
When casting machine operated manually — operator will push/pull manual lever to move lateral rail
chatillon scales or johnsonscale.com from new york has to be completed