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Патент USA US2410178

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06t- 29, 1945-
Filed Nov. 9; 1945
Patented Oct. 29, 1946
Aloysius G. Milasus,_ Roselle, N. J.
Application November 9, 1945, Serial’No. 627,731
5 Claims. (01. 1.7.9—90)
a collar 29. and a coil spring ‘M is positioned be
This invention relates to telephone equipment
tween collar 20 and solenoid Iii‘ which biases
and more particularly to a line pulsing device for
plunger member IT to a position wherein contact
operating automatic of?ce equipment of a tele
roller I9 engages the outermost non-conducting
phone system.
When a‘ telephone subscriber’s station is com C1 segment I4 of‘ bar member I3. Conductor II is
electrically connected to arm I9. In the normal
nected, to automatic o?ice equipment, such as in
deenergized condition of solenoid i6. spring 2|
the widely used dial system, some means. must
thus maintains conductors II and I2 discon
be included in the subscriber’s equipment for
opening and closing the line circuit rapidly a pre~
Solenoid I6 is provided with an energizing
determined number of times. In the well-known
winding 22', one end of which is connected
dial device in current widespread use, a ?nger
through a retarding inductor 23 to one terminal
plate is provided with holes in it. When the
of the secondary winding of a step-down trans
?nger is placed in a hole and-the dial rotated
former 24-. The other terminal of the trans
to a ?nger stop a helical spring is wound up.
When the dial is released, the spring. causes it to 15 former: secondary winding is connected to a buss
rotate to its normal position, operating a ratchet
as it turns; this causes a pair of contacts. to open
and close the circuit the number of times indi
cated‘ by the number dialed.
A main object of the present invention is to
provide a novel and (improved circuit pulsing
bar 25hf-Wlllg?0illle0ted' thereto the movable con
tact arms of ten switch members designated as
S--I to S——Ill; respectively, which may be of the
- normally open spring-biased push-button type.
The end of winding 22’ is connected‘ to the sta
tionary contact of switch S-IO.
Winding 22' is progressively tapped at nine
points along its length and the taps are respec
tively connected through the respective compen
ventional dial device, and being effective to
furnish the required line pulses in a much shorter 25 sating resistors R,—I' to R,——9 t0 the respective
stationary contacts of switch members S—~I to
time than the dial device.
A further object of the invention is to provide
The primary winding of transformer 24 is con
an improved telephone line pulsing structure
nected to an appropriate source of alternating
which is very rapid and reliable in operation and
current, such as to the 110 volt house current line.
is very economical to manufacture.
Winding 22 includes a su?icient number of
Further objects and advantages of the inven
turns and has a resistance'such that when switch
tiOn will appear from the following description
S—I0 is closed a magnetomotive force is de
and claims, and from the accompanying drawing,
veloped, in solenoid I6 which is e?ective to draw
wherein the ?gure is a schematic diagram of a
telephone line pulsing device constructed and 35 plunger member IT rearwardly against spring ZI
to a position wherein contact roller member I9
arranged in accordance with this invention.
engages the rearmost non-conducting portion
Referring to the drawing, II and I2 designate
l4. In so doing, roller member I9 successively
conductors respectively connected to the tele
engages ?ve conducting segments I5, producing
phone line terminals, said conductors being
adapted to establish a circuit for furnishing a 40 ?ve pulses in the telephone line. When switch
S—Ill is released, plunger I'I' returns to its normal
line pulse each time they are connected together.
position, producing five more pulses.
Mounted in the subscriber’s equipment is a sta
Resistance R-9 is of such a value that in con
tionary bar member I3 formed with alternating
junction with the number of turns of winding
non-conducting portions I4 and conducting por
tions I5, there being six non-conducting seg 45 22 included at its top and with the resistance of
the included turns a magnetomotive force is de
ments I4 and five ‘conducting segments I5. Con
veloped in solenoid I6 when switch S—!! is closed
ductor I2 is electrically connected to each of the
which is sufficient to draw plunger member I‘!
conducting segments I5.
rearwardly against spring 2| to a position where
Mounted in the subscriber’s equipment with
its axis extending parallel to bar member I3 is a 50 in roller member I9 engages the rearmost con
ducting segment I5 of bar member l3. In so
solenoid I6 having an axial, movable plunger
doing, roller member I9 causes ?ve pulses to be
member I‘! positioned therein. The outer end of
delivered to the telephone line. When switch
plunger member I‘! carries an arm II! which is
S-—9 is released, plunger I‘I returns to normal
provided with a contact roller I9 adapted to en
gage bar I3. Plunger member I‘! is provided with 55 position, producing four more pulses.
means for. the above purpose of very much
simpli?ed structure, as. compared with the con
Resistor R—8 is of such a value that the
plunger will be drawn rearwardly when switch
fore it is intended that no limitations be placed
on the invention other than as de?ned by the
scope of the appended claims.
ber l9 engages the ?fth non-conducting seg
What is claimed is:
ment I4, producing four pulses on its rearward Cl
1. A telephone line pulsing device comprising
movement, and producing four more pulses when
a bar member having a plurality of linearly
switch S--8 is opened to release plunger ll. The
spaced contact portions, a solenoid arranged with
remaining resistors are similarly graduated in
its axis parallel with said bar member, a mov
value so that the closing and opening of their
associated switch members provides selective 10 able plunger axially positioned in said solenoid,
S—8 is closed to a position wherein roller mem
movement of plunger member I‘! to selectively
produce the desired number of line pulses. t is
thus possible to selectively obtain from one to ten
pulses in the line by momentarily closing a corre
the outer end of said plunger carrying an element
in movable engagement with said bar member,
a retarding inductor connected in the energizing
circuit of said solenoid, a first line conductor con
nected to said contact portions, a second line
spondingly numbered switch member.
conductor connected to said plunger-carried ele_
Retarding inductor 23 is provided to slightly
ment, and means for momentarily moving said
delay the building up and decay of magnetomo
plunger inwardly of said solenoid a predeter
tive force in solenoid l6 solas to dampen the
mined distance.
motion of plunger I‘! slightly and to assure sub
2. The structure of claim 1, and wherein said
stantial contact of roller member IS with con 20
means comprises a tapped connection to said
ductor segments l5 as said roller member pro
solenoid and a resistor in series with said tapped
gresses along bar member l3. Where faster op
eration of the pulsing device is required, retard_
3. The structure of claim 1, and wherein said
ing inductor 23 may be omitted.
plunger is spring-biased to a normal position
Whereas in the conventional dial system the
wherein the plunger-carried contact element en
forward rotation of the dial merely winds up its
gages a non-conducting portion of said bar mem
spring and produces no pulses, in the device of
ber, and wherein said means comprises a plurality
the present invention pulses are produced both
of tapped connections to said solenoid, each con
for forward and rearward travel of plunger ll,
nection having a resistor in series therewith, the
thus pulsing the line in a much shorter time than
resistors being of di?ferent values.
that required to obtain the same result in the
4. A telephone line pulsing device comprising a
dial system. The operation of the present inven
bar member having alternating conducting and
tion is also much simpler in that the subscriber
non-conducting portions, a solenoid arranged
merely momentarily presses a push-button cor
with its axis parallel with said bar member, a
responding to the digit to be dialed instead of
movable plunger axially positioned in said sole
inserting his ?nger in a ?nger hole and rotating
a dial member to a ?nger stop.
noid, the outer end of said plunger carrying a
roller element in. rolling contact with said bar
The values of resistance of resistors R—| to
R—9 will be graduated, the value for R—-l being
member, a ?rst line conductor connected to said
greater than for R-2, the value for R—2 being 40 conducting portions, a second line conductor con
greater than for R~3, etc. The values of these
nected to said roller element, a spring-biasing
resistors may be calculated from the expression:
said plunger to an outer position wherein the
roller element engages a non-conducting portion
of said bar member, a plurality of tapped con
where M is the required magnetomotive force, N
nections to said solenoid, each connection having
is the number of included turns, and I is the
a resistor in series therewith, the resistors being
current required. The value of a resistor is then
graduated in value and being of such values that
given by
when the energizing circuit for the solenoid in
cludes one of said tapped connections the plunger
NM» ~12.
(2) will be moved inwardly a predetermined distance,
and a retarding inductor included in the ener
where E is the applied voltage and R5 is the re
gizing circuit for the solenoid.
sistance of the included turns.
While a speci?c embodiment of a telephone line
pulsing device has been disclosed in the foregoing
description, it will be understood that various
modi?cations within the spirit of the invention
may occur to those skilled in the art.
5. The structure of claim 4. and wherein there
are nine tapped connections, each tapped connec
tion corresponding to a different predetermined
distance of inward movement of said plunger.
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