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Nov. 26, 1946-
2941 1,526
Filed March 31, 1945
3 Sheets—$heet 1
Nov. 26, 194$.
_ Filed March 51; 1945
5’ Sheets~$heet 2
F555;. 5.
NW, 269 1946“
Filed March 31, 1945
3 Sheets-Sheet 5
Patented Nov. 26, 1943
Gerald Deakin, New York, and Ernest S. McLarn,
Manhasset, N. Y., assignors to International
Standard Electric Corporation, New York, N. Y.,
a corporation of Delaware
Application March 31, 1945, Serial No. 586,005
9 Claims.
(01. 179-16)
This invention relates to dial impulse storing
and repeating devices designed for employment in
telecommunications systems such as in automatic
or semi-automatic telephone exchange systems
and the like. An object of the present invention
is to make provision for receiving electrical im 5
pulses, to store the impulses received and, de
pendent on circuit conditions, to later or simul
taneously therewith, retransmit or repeat the
received impulses in properly timed relation to
receiving apparatus such as the register Of an
automatic exchange.
As illustrative of .a typical use of the present
apparatus it may be employed in association with
an incoming trunk to a register of an automatic
fully understood by reference to the accompany
ing drawings wherein like reference characters
are applied to the corresponding parts in the
several views.
In the drawings,
Fig. l is a view of the improved impulse stor
ing and repeating device showing same in side
elevation with the cover shown in section;
Fig. 2 is a schematic View showing the circuit
Fig. 3 is an end elevation taken from the left
of Fig. 1 with the cover member shown in sec
Fig. 4.- is a vertical cross sectional view taken
exchange of the multi-potential selection type 15 on line 4—4 of Fig. 1;
from a Strowger oilice not provided with a reg
ister or other means of storing the call pend
ing the picking up of the register. An example
of such use is disclosed in co-pending application
Serial No. 484,184, ?led April 23, 1943, now Pat
ent No. 2,380,950, dated Aug. 7, 1945. In astraight
Strowger exchange, as is well understood, no
Fig. 5 is a partial view in end elevation cor
responding to Fig. 3 with the parts thereof in
changed or “leading” position;
Fig. 6 is a detailed vertical longitudinal sec
20 tional view of the armature mounting;
Fig. '7 is a vertical cross sectional view taken
on line 'l-—'! of Fig. 1;
Fig. 8 is a skeletonized plan view of the mov
means is provided for storing of the digit impulses
ing parts of the mechanism; and
for the short interval of time required to pick up
the trunk register. Moreover, in the transmis 25 Fig. 9 is a partial view in side elevation of the
follower magnet armature and associated ratchet
sion of the dialling impulses from the Strowger
feed and contact under the condition of magnet
o?iice, particularly when working under maximum
tra?ic conditions, the dialling of a low digit, such
The improved apparatus and associated circuit
as 1, may occur in such rapid succession as to 30
arrangement of the invention, designed for the
be short of the time requirement for the selec_
storing and repeating of received impulses, em
tion at the receiving exchange such as when
ploys in its operation a stepping mechanism em
all but the last few trunks in the selected level
ploying two driven parts which by inter-engage
of a group selector are busy. Under the ?rst
mentioned conditions wherein there is no ade 35 ment open and close contacts for preparing an
impulse repeating or re-transmitting circuit. One
quate time interval available for register selec
of the driven parts is stepped or advanced by a
tion it is necessary that the ?rst digit trunked
magnet responsive to the incoming or received
into an automatic o?ice from a Strowger oil'ice
impulses. The other of the driven members is
be stored in the trunk itself and further that a
full inter-digital time period be provided for reg 40 stepped by a magnet under the control of inter
rupter contacts after the preparation of its ener
ister selection. The device of the present inven
gizing circuit by the leading or advanced rela
tion is designed for the storing and the repeating
tion of the ?rst driven member with relation to
of the impulses under the prescribed conditions
that of the second and cooperating driven mem
in a manner to effect the proper operation of
the related receiving device or register. The im 45
In the preferred structural embodiment of the
proved device, to be so operative, consists of two
device illustrated in the drawings the impulse
driven parts, one of which advances in position
storing and repeating mechanism includes driven
with relation to the other responsive to the num
members in the form of similar rctatably support
ber of impulses received and wherein the other
of the driven parts is caused to have a following 50 ed ratchets rotated by magnet-controlled pivoted
armatures carrying feed pawls engaging with the
movement during which the impulses are re
peated until it reaches the advanced position of
ratchet teeth to e?fect step-by-step rotation there
the ?rst part by inter-engagement therebetween.
of. The mechanism as shown is supported upon
a base or standard I having integrally formed
The foregoing and other features and advan
tages of the present improvements will be more 55 therewith, a rear wall 2, a centrally positioned
vertical supporting wall 3 and forwardly and op
associated with the follower ratchet ‘l’ the mecha
nism further includes switch elements operated
positely positioned brackets ii. Within apertures
in the brackets A a transverse bearing shaft 5
is journaled upon which are freely rotatably
mounted two ratchet wheels 6 and l, of corre
by the return spring 35, which is insulatingly
supported and carries contact element engaging
contact elements carried by coacting resilient
and insulatingly supported springs 36 and 39. It
will be understood that spring 35, in
sponding diameter and provided with similar
ratchet teeth 8. The ratchet wheel 6, which is
the received impulse operated or lead ratchet,
position as shown in Fig. 1, causes engagement
is provided with a hub a formed with axially ex
of the contact element carried thereon with the
tending keys or splines it upon which is slidably
coacting contact element carried on the leaf
mounted a switch actuating collar it having a 10 spring 33, thus a circuit including the springs
radial ?ange l2 provided on one face with dia
35 and 32; is normally completed
a circuit
metrically positioned laterally extending earn lugs
including springs’ 35 and 39 is normally incomv
l3. These lugs l3 project toward and coopera
pleted. Spring 35%. it will be noted in Fig. l, is
tively engage with coacting earn lugs ili-lil car
retained in ?xed position by a stop it. As shown
ried upon a face of the ratchet wheel 3’. Relative
in Fig. '7, the return spring 35. contact springs
rotation of the ratchet and inter-engagement of
38 and 35 and associated insulating washers are
the lugs will accordingly effect shifting of the
supported in position upon the bridge 36 by a
collar ii, thereby effecting the opening of con
yoke 48 secured by a single screw stud iii. A
tacts in the impulse repeating circuit, as will now
cover 42 is provided as shown for the protection
be described. These contacts is and it are car
ried upon ?at spring elements, supported by bolt
of the operating mechanism.
An operating circuit including the hereinabove
I'I upon a bridge is in insulated relation, and
described device is shown diagrammatically by
each is provided with a terminal extension 59 as
way of example in Fig. 2 wherein the coil 2'! of
shown in Fig. 1. As shown in Fig. 5, when the
the lead ratchet operating magnet is connected
cam lugs i3 and the coacting cam lugs it are dis 25 through terminal at to trunk 535 of a Strowger
engaged whereby the collar H is shifted toward
the ratchet wheel ‘l, the contacts l“—i5 engage
for closed circuit as the spring element iii presses
exchange and to the negative battery terminal
46. The lead ratchet wheel 6 is accordingly ro
tated stepwise in response to the impulses re
at its lower end against the ?ange E2 of the ac
ceived from this independent circuit. The fol~
tuating collar H. Engagement of the cams 30 lower ratchet operating magnet 28 for creating
l3-Hl causes axial shifting of the collar ii to
impulses in the repeating circuit is controlled by
open the contacts as shown in Fig. 3. In the
the switch elements l5—-it and additionally by
structural embodiment as shown (dotted lines in
a switch 59 which will be understood to be closed
Fig. 1) each of the spring elements carrying the
in any known manner as soon as the register is
contacts l5 and It is forked to provide legs strad“
connected. The circuit for magnet 28 extends
dling the collar H, and the extremities of these
over lead E? from the positive battery terminal
elements are formed as shown by laterally bend
is, the switch elements it and it, lead 49, ter
ing same toward the flange to provide oilset en
minal Sit, lead 5i, switch 59, terminal 511., the
gaging portions 29, each having a rounded sur
leaf spring switch elements 35, 3‘3, magnet 28,
face pressing against the ?ange 92 to cause axial 40 lead 55 to the negative terminal 135. The impulse
shifting of the collar H as above stated.
repeating circuit extends over a stepping relay
A uni-directional step-by-step rotation of each
60 in the register, lead 58, terminal 5?, the leaf
of the ratchets 6 and 'l is provided by similar
spring switch elements 39, 35, terminal 54, switch
magnetically operated feed pawls 2i coacting
elements 59, H5, i5 to the positive battery ter
with the ratchet teeth. The customarily em~
minal. Accordingly, the operation of the fol~
ployed cooperating retaining springs 22 engag
lower ratchet controlling magnet 28 is dependent
ing with the ratchet teeth, are supported upon
?rst upon the closing oi the control switch ele:
the bridge member is and retain the ratchets
ments its-46 and on completion of the circuit
in the successive positions, opposing reverse
over the switch 59, and it continues to step until
movement thereof. The feed pawls 2 i, pivotally
the switch elements 55-4 5 are opened by engage
supported at 23 upon extensions "24 of armatures
ment of a lug it on the ratchet l with 2. lug l3
25, are independently operable by means com
of the ?ange i2 rotated by the ratchet 6.
prising a magnet structure including the coils
The operation of the device above-described
21 and 28 having the usual cores 2%. The arma
tures 25 are pivoted at 26 upon brackets to which,
as is best shown in Fig. 6, are secured in position
by screw 3! to permit armature-magnet air gap.
The magnetic ratchet rotating mechanism above
described will be understood to be or’ correspond
is as follows: the cam lugs l3 and iii are in en~
gaged relationship accordingly switch elements
l5 and it are not in contact and accordingly no
current flows from the battery through magnet
coil 23.
As impulses are transmitted in ‘the
trunk lines, circuit normally is completed from
ing construction for each of the ratchets E and 60 the trunk with the register and switch 75%’ is ac
'i and each further includes adjustable stops 32,
engaging theunder sides of the feed pawls to
limit the‘ downward movement thereof, ?at
springs 33, supported upon the arms 2:’: and en
gaging rearward extensions as of the pawls, re
siliently to urge the latter into contact with the
ratchet teeth and return or feed springs to, sup
ported upon a bridge 38 and engaging lugs 3‘?
of ‘the armature extensions 26 to effect downward
or feed movement of the pawls and rotation of
the ratchet wheels upon each release of the
armature. Insofar as now described, the two
cordingly closed, but should circuit not be com
pleted from the trunk with the register, switch
59 is moved to open circuit position. 'The ii.--~
pulses from the trunk, meanwhile, have. caused
stepwise rotation of the lead ratchet E by energiQ
zation of the magnet coil 2‘? which is connected
across the trunk terminals ‘M and lit, andlas this
ratchet is rotated the engaging lugs l3 and it
are disengaged ‘thereby permitting the spring
pressing member 15 to shift the collar liaxially
causing closing of the switch elements i?3—.l5.
When this occurs and if circuit is completed be
magnetic ratchet feed devices operated by the
tween the trunk and ‘the register, the magnet
two magnets are similar structures but in the
coil 23 is then connected through closed switch
case of the magnet element including coil 28
59 in closed circuit with the battery, thereby re
comprising lead and follower ratchet driven
ceiving an impulse which results in stepwise ro
tation of the follower ratchet 1, engagement of
members rotatably journalled and formed and
supported for shifting engagement to establish
the cam lugs i 3—| 4 and opening of the switch
a coacting position, a ?rst magnet having a
the magnet coil 23, as it causes operation of the cl spring pressed armature provided with a feed
pawl positioned to advance the lead member re
corresponding armature results in momentary
sponsive to received impulses, a second magnet
elements l5—|6. Each impulse thus received by
leaf springs
39 whereby
carried 1g
positioned to advance the follower member, an
energizing circuit for the second magnet includ
ing a control switch adapted to be opened in the
engaged position of the driven members and
of currents
the register
are causing
it to to
the stepp
the cor~
responding line.
been connected to the register, switch
open circuit position, hence the transmission of
digit selecting operating impulses to the stepping
relay is postponed until such connection is estab 15 be closed over said control switch and over fur
lished, but when this occurs magnet coil 23 is
ther contacts controlled by said second magnet.
6. An impulse storing and repeating device
energized and the mechanism transmits the im
pulses as above-described.
What is claimed is:
1. An impulse storing and repeating device 20
comprising lead and follower driven member
supported and formed for inter-engagement to
establish a coasting position, a ?rst magnet to
advance the lead member responsive to received
impulses, a second magnet to advance the fol
lower member, an energizing circuit for the sec
ond magnet including a control switch adapted
to be opened in the engaging position of the
driven members and closed when the lead mem
ber is in advanced relation with respect to the
follower member and interrupter contacts ar
ranged to be actuated by said second magnet.
2. An impulse storing and repeating device
comprising lead and follower driven members 35
supported and formed for inter-engagement to
establish a coacting position, a ?rst magnet to
ergization of said second magnet.
7. An impulse storing and repeating
actuated by said second magnet.
3. An impulse storing and repeating device com
prising lead and follower driven members sup
ported and formed for inter-engagement to estab
lish a coacting position, a ?rst magnet connected
and closed when the lead
member is in advanced relation with respect to
the follower and repeating contacts closed re
sponsive to each actuation of said second mag
4. An impulse storing and repeating device
follower ratchet driven
control switch having a movable contact engaged
by the collar to
tiomng of the driven ratchets and
second magnet
and an impulse repeating circuit connected to be
closed responsive to deenergizing of said second
9. An impulse storing and repeating device
75 comprising lead and follower driven members ro~
9,41 1,528
bers and closed on advanced positioning of the
tatably supported and formed for inter-engage
lead member, means for intermittently energiz
ment to establish a coacting position, a ?rst mag»
ing said second magnet, an impulse repeating cir
net operative to advance the load member step
cuit and contacts for closing the repeating circuit
by step responsive to received impulses, a second 5 responsive to opening of said energizing circuit.
magnet operative to advance the follower mem
ber, an energizing circuit for the latter magnet
including a control switch adapted to be opened
in the coacting positioning of the driven mem
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