US1529151A - Controlling system - Google Patents

Description

March 10, 1925- 1,529,151

W. P. ALBERT CONTROLLING SYSTEM Filed June 20, 1922.

Patented Mar. 10, 1925.

UNITED STATES PATENT OFFICE. v

WALTER P. ALBERT, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO WESTERN ELEC- TRIC COMPANY, INCORPORATED, OF NEW YORK, N. Y., A

YORK.

CORPORATION OF NEW CONTROLLING SYSTEM.

Application filed June 20, 1922. Serial No. 569,682,

To all whom it may concern.

Be 1t known that I, IVALTi-iit P. .ALIsER'l, a cltlzen of the United States, residing at East Orange, in the county of Essex, State of New Jersey, have invented certain new and useful Improvements in Controlling Systems, of which the folowing is a full, clear, concise, and exact description.

This invention relates to electrical control devices and more especially to devices of this character when adapted tor use in telephone and similar systems.

The object of the invention is a control system in which an operating and controlling relay is actuated in response to local currents induced or created by changes of current in a line circuit.

A feature of the invention relates to the provision, in a system where variably operable switches or similar devices are actuated by a control relay, of local circuit-s each i11- cluding a winding of said relay in which invention is illustrated as incorporated'in a telephone system. it is' to be understood that controlling mechanisms of this character may be applied to a wide variety of uses. In the 'pres-' ent instance, however, it is shown as adapted for receiving current impulses transmitted over a subscribers telephone line to the central oilice and in turn for delivering these impulses to a registering or recording equipment.

The drawing illustrates a portion of a subscribers telephone line 102. 103 entering a central ofiice. In any well known manner this line is extended through a line finder or a line switch either to a trunk leading to a selector switch or to an operators position as desired. Inasmuch as the means for extending the subscribers line forms no es drawing an electrical control mechanism embodying the principlesot th1s In its broadest aspect sential part of this invention, the same has not been shown.

Since it is desirable to take a record of the impulses transmitted over the line, there is provided at the central oflicc an impulse receiving and registering apparatus. This registering mechanism comprises among other elements a plurality of relays 106, 108 and 111 which receive the incoming impulses and deliver them to the registers. There may be any desired number of registers for receiving the impulse series and also these registers may be of any suitable form. 'Iwo registers 110 and 115 are shown, each consisting of a step-by-step switch driven by a stepping magnet 124 or 125. As many other registers as are needed may obviously be provided.

In addition to the registers a control switch 120 is employed for associating the impulse receiving relays in'succession with the several register switches so that as soon as one series of impulses is recorded on a given register the next series may be recorded on the succeeding register.

It is sometimes desirable to provide a plurality of these impulse receiving and recording mechanisms atthe central oiiice, any one of which may be associated with a subscribers line. To this end a selecting switch, the brushes 104 and 105 of which are illustrated, is employed for finding an idle mechanism.

A detail description will now be given of the manner in which the system operates. When the subscriber of line 100'initiates a call, the line is extended'through the brushes 104 and 105 of the selector switch to an idle impulse receiving andrecording mecha-, nism. A circuit may there-upon be traced from battery, through the left-hand winding of relay 108, brush 105, conductor 103', over the loop of the calling line and returning by way of conductor 102, brush 104, through the lett-hand winding of the balancing coil 107 to ground. Current flowing in this circuit energizes the left hand winding of relay 108. and also sets up a flux in the lefthand winding of the bal-- ancing coil 107. A circuit also may be traced from battery, through-the left-hand winding of relay 108, condenser 109, lefthand winding of relay 106, leit-hand wind- 1.

produce a charge on the condenser.

is reduced by the shunting action of the circuit traced including the line. Another circuit may be traced from battery, through the right-hand Winding of relay 108, middle winding of relay 106, conductor 131, brush 112 of the control switch 120, terminal 113, contact of magnet 124, conductor 130, winding of'relay 121, brush 116, terminal 117, condenser 126, resistance 127 to ground. The potential applied across the terminals of condenser 126 in the circuit just traced and also through the winding of magnet 124 builds up a charge in said condenser. The relay 106', however, remains inert since suflicient current does not pass through the windings of said relay to cause the operation thereof. Relay 108 becomes energized through its left-hand winding and closes a circuit for the relay 111 which also operates.

When the subscriber manipulates his dial 101 to send a series of impulses, the line circuit is opened at the first interruption of the contacts of the said dial. Immediately that the line circuit opens, the flow of current windings of relay 108 and coil 107 according to well known laws induces a high potential which creates a momentary flow of current. Since the line is open the current of self-induction cannot flow therein and, the

shunt of the line being removed from the condenser 109, the potential of battery applied across the condenser 109 through the left-hand windings of relays 108, 106 and 107, aids the potential'of self-induction to This charging potential causes current to flow through the left-hand winding of relay 106.

Likewise the collapse of flux at the relay 108 induces a momentary potential in the right-hand winding thereof. Since the condenser 126 is already charged to battery potential, the added higher potential of selfinduction is sufficient to increase the charge on the said condenser, causing a momentary flowof current through the middle winding of relay 106. The combined flow of current through the left-hand and middle windings of relay 106 is sufficient to cause said relay to attract its armature. Immediately that the relay 106 operatesa circuit is closed from battery, through the right-hand winding of relay 108, middle winding of relay 106, contact of relay106, contact of relay 111, to ground. Relay 106 looks in this circuit and is held by the steady flow of current after the momentary current of self-induction dies away. Upon the operation of relay 106, a circuit is established from ground through the contact of relay 1111, contact of relay 106, right-hand winding of'relay 106, con;

ductor 130, winding of slow-to-relea-serelay 121, brush 116, terminal 117, winding of stepping magnet 124, to battery. At the same time a circuit is also closed from ground through the. contact of relay 111, contact of relay 106, conductor 131, brush 112, terminal 113, contact of magnet 124,

winding of relay 121, brush 116, terminal 117, windingof stepping magnet 124 to battery. It will be noted that the circuit last traced is in shunt of the previously traced circuit through the right-hand winding of relay 106. The stepping magnet 124 becomes energized in this circuit and when deenergized advances the brush 122 and such other brushes as may be associated with the register 110. IVhen the armature of the register magnet 124 has taken a full forward step, the contact of said magnet opens. The opening of the contact of magnet 124 removes the shunt around the right-hand winding of relay 106, whereu on this righthand winding is included directly in series with the winding of stepping magnet 124 and becomes fully energized.

The right-hand winding of relay 106 is wound in a differential relation with the other windings of said relay. Hence, when saidright-hand winding is fully energized it differentiates the effect of the nuiddl'e winding, and the relay in consequence re-' leases its armature. The release of relay 106 opens the circuit of stepping magnet 124 and the latter becomes deenergized.

Relay 121, upon energizing, closes a circuit for the stepping magnet 119 of the control switch 120. Magnet 119 operates'and prepares to advance the brushes 112, 116, 133, etc. from the first position to the second position. This switch is so constructed that the brushes are not moved forward until.

the stepping magnet deenergizes.

In the meantime, the subscribers'line is closed at the end of the first interruption and the circuit through the" left-hand winding of relay 108 and the left-hand winding ofcoil 107 is reestablished. Hence, relay 108 remains energized from one interruption to the next,- assummg that the subscrlbers line closes before the relay 106 has time to'deenergize on the preceding interruption. j

Should, however, the relay 106 become differentiated and release to open the circuit series of operations occur and the magnet 124 advances the brushes of the register switch from position to position. During the series of interruptions, slow-to-release relay 121 remains energized to hold the circuit of magnet 119 closed. At the termination of the first series, a suflicient interval elapses to permit the deenergization of relay 121. This relay opens the circuit of magnet 119, which in turn, releases to advance the brushes 112, 116, etc. of the control switch 120 on to their second position terminals.

With the subscribers line closed preparatory to sending the second series of interruptions, the circuit previously traced through the left-hand winding of relay 108 and the left-hand winding of coil 107 is established and the condenser 109 is shunted and-discharged as explained. VVith the control switch 120, however, in position 2, the following circuit is established: battery, through the right-hand winding of relay 108, middle winding of relay 106, conductor 131, brush 112, terminal 114, contact of magnet 125 of the second register 115, conductor 130, winding of relay'121, brush 116, terminal 118. condenser 128, resistance 129 to ground. The condenser 128 is charged in this circuit.

For each interruption of the second series the relay 106 is operated by a momentary current induced in the circuits including its left-hand and middle windings, respectively, and an impulse is delivered to the stepping magnet 125 of the second register'switch 115. At the end of the second set of interruptions when the switch has been set to the corresponding position, relay 121 becomes deenergized and the stepping magnet 119 advances the control switch to its third position.

In a similar manner as many succeeding register switches or similar devices as necessary may be operated.

Vhen it is desired to release the registers the line is opened permanently and relay 108 releases for a suflicient interval to permit relay 111 to retract its armature. Relay 111 closes a circuit through its contact, brush 133 and the associated terminals, contact and winding of magnet 119 to battery. Magnet 119 interrupts its own circuit and advances the brushes to the releasing position where the registers 110, 115 may be restored in any well known manner.

hat is claimed is:

1. The combination with a line circuit having a source of current therein, of a plurality of other circuits, a relay having a winding in each of said other circuits, means for changing the flow of current in said line circuit, the change or" current in said line circuit inducing a flow of current in each of said other circuits, said relay responding to the current induced in said other circuits, and a variable operable device actuated by said relay.

2. The combination with a line circuit and a source of current therein, of a number of other circuits, a relay having a separate winding associated with each of said other circuits, means for repeatedly opening and closing said line circuit, the change of current in said line circuit caused by each opening thereof inducing a flow of current in each of said other circuits, said relay responsive to the flow of current induced in said other circuits, and a variably operable switch actuated at each operation of said relay.

3. The combination with a line circuit having a source of current therein, of a plurality of other circuits, a relay having a plurality of windings, one included in each of said other circuits, means for changing the flow of current in said line circuit, the change of current in the line circuit. induc-- ing a momentary flow of current in said other circuits, said relay responding to the flow of current induced in said other circuits, means for maintaining said relay operated after the momentary current ceases to flow, and a variably operable device actuated by said relay.

4. The combination with a circuit having, a source of current therein, of a second circuit, a relay having a winding insaid second circuit, a condenser in said secondcircuit, means for altering the flowof current in said first circuit, the change of current in said first circuit inducing a current in said second circuit which charges the condenser and flows through said winding, said relay responding to said induced current, and means controlled by said relay.

5. The combination with a line circuit having a source-of current there-in, of a second circuit, a relay having a winding in said second circuit, a condenser in said second circuit arranged to be charged by the source of current in said line, means for changing the flow of current in said line, the change of current in the line circuit inducing a current in said second circuit which charges the condenser and flows through said winding, said relay responding to the induced current, and a variably operable switch actuated by said relay. 7

6. The combination with a line circuit having a source of current therein, of a plurality of other circuits, a relay having awinding associated with each of said other circuits, a condenser in each of said other circuits, said condensers arranged to be charged by the source of current in said line circuit, means for changing the flow of current in said line, the change of current in said line circuit inducing a current in each of said other circuits which charges the respective condensers and flows 'through the corresponding windings of said relay, and a variably operable device actuated by said relay;

7.. The combination with a line circuit having a source of current therein, of a second circuit, means for changing the flow of current in said line circuit, the change of current in. said l-i-ne circuit inducing a 'momentary flow of current in said second circuit, a relay responsive to the current induced in said second circuit, a progressively operable device actuated on each operation of said relay, and means for holding said relay operated until said device has completed its operation.

8. The combination with a line circuit having a source ofcurrent therein, of asecond circuit, a relay having'a winding in said second circuit, means for repeatedly opening' and closing the line'circuit, the change of current in said line circuit due to each opening, thereof inducing a momentary flow of current in said second circuit, said relay responding to each momentary flow of cur rent in said second circuit, a progressively operable switch actuated at each operation of said relay, and means for maintaining the operation'of said relay until said switchihas taken a full operation.

9. The combination with a line circuit having a source of current therein, of a second circuit, a relay having a winding in said second circuit, means for changing the flow of current in the line circuit, each change of current in said line inducing a momentary fiow of current in said second circuit, said relay responding to the currents induced in current in said line inducing a flow of current in said second circuit'for operating said relay, a step-by-step switch operated on each operation of said relay, and a differential winding for said relay rendered efiective by said switch for causing the relay to release. 11. The combination of a line, means to transmit impulses over said line, a line relay, means to maintain said relay operated during the sendingof a series of impulses, and a second relay actuated'in response to the inductive action of each impulse. on said line relay. 7

12. The combination of a line, means to transmit impulses over said line, a relay connectedto said line and arranged to remain energized during the sending of a series of impulses, a second relay actuated in' response tothe effect of said impulses on'tlie firstrelay, a device arranged to take a setting in response to said second relay, and release mpans for said device controlled by said first re ay.

In witness whereof, I hereunto subscribe my name this 19th day of June, A. D. 1922.

TVALTER P. ALBERT,

Images