US1654923A - Telephone system - Google Patents

Description

Jan. 3, 1928.

J. W. DEHN TELEPHONE sYs'rEu Filed Nav. 30. 1926 Patented Jan. 3, 192,8. UNlTEDsTATES PATENTOFFICE.

JOSEPH W. DEHN, on BROOKLYN, NEW YORK, AssrGNon To. BELL 'rELE'rHoN'E LABORA- TORIEs, INCORPORATED, or NEW YORK, N. Y., A CORPORATION OE NEW YORK.

TELEPHONE B YB'IEI.

Application iled November 30, 1926. Serial 1ro. 151,601.

This invention relates to telephone systems and more particularly to message register circuit arrangements tor such systems. n

According to this invention a metering 5 system including a subsoribers service meter Y and an operators position meter, together with a key and a double wound relay at the operators position, are so arranged that the depression of the key operates the service meter and shunts one winding of the relay without causing it to operate, andthe operation of said service meter alters the shunt in such a `manner as to allow 'the relay 'to actuate, in turn operating the. position meter. This arrangement improves the marginal operatin characteristics of a marginal relay or e ectromagnetic device used in tele phone systems for recording and .indicating purposes. A marginal relay and aclrcuit therefor may be employed in message vregister circuits where this circuit is part of the usual sleeve circuit between a subscribers line and a cord circuit and where it is desired to have the marginal relay operate after the usual line message register 1n this sleeve circuit has been actuated. The marginal relay be employed to actuate a osit-ion meterv and also if desired to lig t a signal to indicate the actuation of the message register. Y

The invention has been illustrated in the accompanying drawings in which a diagrammatic presentation has been made of a callin line, a message register therefor and a ca led line as well as a cord circuit in which has been incorporated a marginal relay, a osition meter and a signal lamp controlled y said relay and the circuit vmeans therefor are arranged in accordance with this inven tion.

Referri-n now to the drawing, l indicates acalling su scribers line; 2 a messa e register for recording calls made by t e sublscriber of this line.; 3 indicates a cord circuit in diagrammatic form for connecting line 1 With a called line 4; While 5 shows Va polarized marginal relay arranged to control a position meter 6 and lamp 7 when a key 8 is actuated to connect it tothe sleeve circuit of cord 3. s

The operation lof the invention when apcalling line l to the cord circuit 3 in the usual manner, a circuit is closed from bat-y tery 15 through the sleeveeircuit, the terminals of the answering plug 13 and the ca1l-. ing subscribers jack 14, through the windings of the calling line message register 2 to ground. This circuit extends also through the Winding of the usual cut-cifrelay 16V for the operation of the out-ottv relay. As is well known in the art, the sleeve circuit extends through the windings of the message Vregia- -ter 2 in order that the message register may be controlled over a portion of the sleeve circuit ywithout however being actuated when for the operation of the cutoff relay.

YlVhen it is desired to -actuate the message register 2 to record the callover line 1 and to actuate the relay' to operate the posi tion meter 6 to count the kcall at the -position and to light the lamp 7 to indicate to the operator that the message register 2 has o erated, key 8 is depressed; To cause the a ve operations to take place in the order mentioned, the marginal relay 5 is provided with two windings of different resistances, the left hand winding of comparatively low resistance and the right hand Winding of comparatively high resistance connected lin .the circuit is completed through battery 15 series opposition through a high voltage .Y

battery 17. The voltage of this battery 17 is higher than that of battery 15 in order to secure the operation of message register 2 in rthe' manner hereinafter described.

VWith this arrangement the following operations will take place when key 8 is actuated:

shunted and the combined resistance of the windings of-message register 2 and the left hand winding of relay 5 is suchas to cause Y 5 to loecome nearly equal. This arrangement causes the operation oit' message register 2 as the current in the sleeve circuit is increased due to the high voltage ot loattery 17, but prevents theoperation Voit relay 5 as the two windings of this relay are in opposition as hereinheliore mentioned. Upon the operationo't message register 2 the right hand winding oi" this rregister is short circuited through the armature and front contact ot' the register to ground.` A.YVhen this takes place the ampere turns through the let't hand winding of relay 5 become greater than the ampere turns through the right handwinding and under these conchtions relayv 5-will operate to attract its armature. Thefattrac-tion of the armature of relay 5lcauses an obvious circuit to be closed for the lighting of lamp 7 which thereby notifies the operator of the operation of the message register 2 and this armature will also close an obvious circuit for the "position register 6 to cause it to vbecome actuated to count the call.

In an arrangement of this sort the marginal relay 5, the position register 6 and the lamp 7 are' common to a plurality ot cord circuits, such as 8. l a' The relay 5 is also polarized in such a manner'that theV high resistance winding tends to operate the armature vaway from the contact. The purpose ot this is to guard against a momentary operation oit relay 5 at the instant the lower contacts of lreyl 8 are closed and prior to the closure ot the upper contacts of said key.

It is evident that the particular arrangement shown is only typical ot the application ot this invention to a particular system and that the invention may readily he used in various other systems without departing 'from the spirit thereof.

-What is claimed is: f

1. In a telephone system, a line, a meter associated therewith, a source ot current, an electromagnet having a pair ot windings arranged in series opposition with said source, means for placing a shunt about one oi said windings and for actuating said meter, and means responsive to the actuation of said meter for changing said shuntto cause the actuation of said electromagnet.

' 2. In a telephone system, a line, a meter associated therewith, a source yoit current, an electromagnet having a high resistance winding and a low resistance vwinding arranged in series opposition 'with said source, means for partially shunting the high resistance winding to cause the ampere turns ot both of the windings of said electromagnet to become substantially equal and :fior actu atingsaid meter and means responsive to the actuation of said meter :for further shunting .said Vhifrh resistance winding to change the relative ampere turns of said windingsvto cause the actuation of said electromagnet.

3. In a telephone system, a line, a meter associated therewith, a source of current, an electromagnet having a high resistance winding and a low resistance winding arranged in series oppositionwith said source, means for partially shunting the highresistance winding to cause the ampere turns of both ot the windings of said electromagnet to become substantially equal and for actuating said meter, meansl responsive to the 'actua-- tion of said meter for further shunting said high resistance 'winding to change the ainpere turns of both of said windings toA cause the actuation of said electromagnet, and a signaling means actuated Vloy theoperation of said electromagnet'to indicate the operation of the meter. v A 1 4:. In'a telephone system, aV calling line, a called line, a meter and a cut-oft relay associated with the sleeve circuit of' said calling line, a lcord circuit for connecting said lines, including a sleeve circuit, means responsive to the connection of the cord circuit Vto the calling line fory actuating said cut-oft relay and ior preparing a circuit 'for said meter, a source of current, anelectromagnet having two windings associated with said sourceot current in series opposition, means for connectingsaid windings to the sleeve circuits of the cord circuit" and the calling line so as tocau'se t-he actuation of thel meter, and means responsive to Vthe actuationV of the said meter 'for-changing Vthe connection of said windings through the sleeve circuits so as to cause the actuation of said electromagnet. j

5. In a telephone system, a calling line, al calledline, a meter associated with the sleeve circuit of the calling linefa cord circuit in-A cluding a sleeve circuit and arranged for connecting said lines, means responsiveto the connection'of the cord circuit to the calling line :tor actuating s aid cut-oi'relay and i'or preparing ya circuit `for said meter, asource of current, van electromagnetic de vice'having two windings associated with said source of current'in series opposition,

means for connecting said windings'and source ot'current to saidsleeve 'circuits to causek the actuation of said meter without the actuation ot said electromagnetic device, means responsive to the connection of said*v electromagnetic device in the sleeve circuits and the actuation of the meter for operating said electromagnetic device, and means meter associated therewith, asource of curi l rent, an electromagnet having a pair of windings and a polarized armature, said windings connected in series opposition with said source, switching means for connecting the service meter n shunt to one of said windings to cause the operation of said mete1',and means responsive to the operat1on JOSEPH W. DEHN.

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