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Патент USA US2112308

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March 29,1938.
Filed July 27, 1955
‘ 2,112,308
Patented Mar. 29, 1938
Croydon, England, as
Reginald Dennis Salmon,
Company Limited, Grey
signer to Creed and
don, England
Serial No. 33,545
Application July 27, 1935,
August 23, 1934
In Great Britain
2 Claims. (Cl. 178-341)
the following description taken in conjunction
This invention relates to translating mecha
with the accompanying drawing in which
nism for printing, recording, registering and like
Fig. 1 shows a side elevation of one unit of a
apparatus and more particularly to mechanism translating mechanism according to the inven
. for selecting individual characters from a bank
5 of characters as a result of the movements of a
Fig. 2 is a plan view of several units of the
number of members each moved according to an mechanism showing how they are interconnected,
element of the code representing the character. and
Devices of this kind are known in which the
Fig. 3 shows one manner in which the trans
resultant motion of the character selecting lating mechanism may be actuated.
Referring to Figs. 1 and 2, a bar l is adapted by
10 mechanism is the aggregate of the motion caused
by all the members, and in particular it is known its movement to right or left to move a forked
to use a series of cords passing over pulleys, in
such a way that the movement of each cord is
detent lever 22.
In the translating mechanism as
transmitted in diiferent ratio to a typewheel.
applied to selecting a character according to its
representation on a ?ve unit code, there will be
15 In this arrangement, however, each cord was
movedby a separate magnet.
?ve bars such as i, each actuating a forked de
tent lever such as 2. The five bars may be
It is an object of the invention to provide
means whereby the motion of each member shall
moved in various combinations by depressing a
be imparted in a positive and effective manner,
key of a keyboard. In a type printing receiver
the ?ve bars 5 may be moved in the same man 20
and whereby the character selecting mechanism
ner as the ?ve notched combination bars or
due magni?cation of movement, and in such a
way that the moving parts are accelerated and
brought to rest with a minimum of shock, so that
the machine shall be as silent as possible in
notches in such bars or combs are aligned to
select a type lever for striking against the paper
or for stopping a continuously rotating type
20 may be moved the required amount without un
It is another
object of the invention to
a practical form of aggregate motion
using the movement of belts passing over
that shall be compact and adapted to
requirements in teleprinters and the like.
According to one feature of the invention I
combs in type printing mechanism in which
wheel in printing position. Mechanism for set
ting such bars successively in accordance with
the response of a single magnet to received sig
nals is well known.
Each detent lever cooperates with a disc 3, 3’
or 3” carrying a pin Ii, 4' or i". The disc tends
to be driven through a friction clutch from a
provide translating mechanism of the kind re
continuously rotating shaft but is prevented from
moving by the detent lever in the position shown.
ferred to in which the movement of a character
selecting mechanism is the aggregate of a series
When the bar I is moved to the right the disc 3
of separate movements transferred from the
tion when it is again arrested. Subsequent
movement of the bar I to the left would again
movements of a plurality of members set in suc
cession by the response of a single magnet to
received signals by means of a corresponding
40 series of belts and pulleys, each belt passing over
a pulley and transferring its movement to the
next belt and the movement of the last belt
being transferred to the character selecting
According to another feature of the invention
I provide translating mechanism of the kind
is released so as to move through half a revolu
release the disc 3 for a second half revolution.
To the pin 4 is attached one end of a belt 5 in 40
the form of a steel tape which passes over a
pulley 6. The other end of the steel tape is
attached to a pin 1. On the same spindle as the
pulley 6 is a grooved wheel it which slides in a
slot in a ?xed frame I2. The spindle of the
grooved wheel ill and pulley t is ?xed to a frame
8 to which is also ?xed a second grooved wheel I i
also sliding in the slot in the frame H2. The
referred to in which the ends of a plurality of
belts passing over pulleys are attached to mem
frame 8 is under the action of the belt 5 and a
bers, each released for movement through a spring I3 is ?xed at one end to the sliding frame
given distance by power driven means in accord ‘ 8 and at the other to the ?xed frame I2. A
ance with the elements to be translated in such rack 9 is ?xed to the frame 8 and meshes with a
a manner that the movement of a character se
gear wheel M on the spindle of which is ?xed a
lecting mechanism is the aggregation of the
movement given to all the belts.
The invention will be better understood from
type wheel Hi.
When the detent 2 is moved from the position 55
shown the crank pin 4 rotates through half a
revolution and the pulley 6 and frame 8 move
through half the throw of the pin 4. This move
ment is communicated to the type wheel I5, the
gearing being such that the type wheel also
makes half a revolution.
The belts 5' and 5" attached to crank pins 4'
and 13" respectively pass over pulleys 6' and 6"
and are attached to pins 1' and 1" respectively.
10 The pin ‘l to which belt 5 is attached is mounted
on the frame 8’ carrying the pulley 6'.
The pin
7' to which the belt 5' is attached is mounted on
the frame 8" carrying the pulley 6".
When crank pin 4’ is given half a revolution,
15 the frame 8' moves through the same distance
as the diameter of disc 3’, and pin 1 moves
through half this distance. The frame 8 then
moves through half the movement of pin 7 and
type wheel i5 is given a quarter revolution.
20 Thus there is a 2: 1 step down between the move
ment of a crank pin and the movement trans
mitted to the next unit.
By placing the pins 7, 1', etc. on moveable
frames carrying the pulleys, these pins may be
25 placed at such a distance to the left in Fig. 2
that a very compact structure results and the
whole mechanism is contained within workable
In the case of the ?ve unit code there will be
30 ?ve units. Three only have been shown in Fig. 2
as these are sui?cient to show the construction
of the apparatus. The ?rst crank pin serves
to move the type wheel through half a revolu
tion, the second through a quarter and so on, the
35 last one moving it through one thirty-second,
or the space of one character.
Although a combination bar | and forked de
tent has been shown in Fig. 1, other means of
releasing the disc 3 for half a revolution may be
40 used. One such means is illustrated in Fig. 3
which also shows another means of driving the
The disc 3 is provided With a hub “3
which ?ts Within a hollow bearing I? carried on
a ?xed frame. On the bearing I7 is loosely car
45 ried a toothed wheel i8 attached to‘ a gear wheel
i3 continuously driven.
A pawl 2| adapted to
mesh with the toothed wheel I8 is pivoted on a
pin 25? carried on the inner surface of the disc 3.
The pawl 2| tends to be pressed into engagement
50 with the toothed wheel l8 by a spring 22 ?xed
to the disc 3. In the position of the disc 3 shown
the pawl 2| is held out of engagement with the
wheel it by means of a two armed detent lever
and when the pin 4 is at the opposite end of
55 its diameter by a similar detent lever 24. The
two levers 23 and 24 are pivoted on pins 25 and
23 and held in engagement with pawl 2| by a
spring 27. The disc 3 is held in either of its
two positions by a detent lever 28 pivoted on pin
25 and held in notch 30 or notch 3| in disc 3 by
a spring 29.
If disc 3 be in position shown and the hori
zontal portion of lever 23 be depressed pawl 2|
will be pressed into engagement with wheel I8
and the disc 3 will rotate therewith until lever
24 disengages pawl 2| and simultaneously lever
28 arrests disc 3 by falling into' notch 3|. The
disc 3 will then be moved from its second posi 10
tion by actuation of detent lever 24.
The levers 23 and 24 may be selectively de
pressed according to the nature of the element
of a character by moving an intermediate piece 15
to left or right above the ends of their horizontal
portions and striking this piece down for each
character. In the case of telegraph receiving
apparatus of the start stop type the intermediate
piece may be struck downwards by a cam after 20
a received signal.
What is claimed is:
all such pieces have been set by the elements of
1. Translating mechanism comprising in com
bination a series of members, power driven means 25
tending to move each of said members, detent
means for releasing each of said members for a
predetermined movement only, a belt, a pulley,
and a frame carrying said pulley for each mem
ber, the belt passing‘ over the pulley and having 30
one end attached to the member and the other
end attached to the frame, the other end of the
last belt being attached to a ?xed point, grooved
wheels ?xed to each frame and adapted to move
in a slot in a ?xed frame, an indicating mem 35
ber adapted for movement by one pulley, means
for keeping each belt under tension, and means
for operating said detent means in a combina
tion representing a character to be translated.
2. Translating mechanism comprising in com
bination a series of discs tending to be continu 40
ously driven by common power driven means,
detent means individual to each disc for holding
said disc from rotation and when actuated allow
ing a rotation of half a revolution only, a crank
pin on each disc, a metallic tape, a pulley and a 45
frame carrying said pulley for each crank pin,‘
the metallic tape passing over the pulley and
having one end attached. to the crank pinv and
the other end to the frame of the next pulley, the
other end of the last metallic tape being attached 50
to a fixed point, an indicating member adapted
for movement by one pulley, means for keeping
each metallic tape under tension, and means for
operating said detent means in a combination 55
representing a character to be translated.
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