US2203358A - Selective remote control - Google Patents

Description

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June 4, 1940. w. KOENIG SELECTIVE REMOTE CONTROL Filed Dec. 21, 1937A3 3 /1 7 arr-wen SWITCH OFF- NORM/1L W a ATTORNEYS l/V VE N TOR Patented June 4, 1940 I 23.3358 SELECTIVE REMOTE CONTROL Werner Koenig, Lucerne. Switzerland, usignor to Landis .2 Gyr, A-G., Zug, Switzerland, a corporatlon of Switzerland Application December 21, m1, Serial No.1,953 In Switzerland December 24, 1936 3 Claims.

The invention relates to a receiving device for a remote control system connected to an alternatin'g current network and designed to control or effect definite operations, and more particularly to such receiving devices controlled by a transmitter, and wherein the selection or control of the different operations is determined by the length of time between two interruptions of the alternating current network.

Objects and advantages of the invention will be set forth in part hereinafter and in part will be obvious herefrom or may, be learned by practice with the invention, the same being realized and attained by means of the instrumentalities and combinations pointed out in the appended claims.

The invention consists in the novel parts, constructio arrangements, combinations and improvements herein shown and described.

The accompanying drawing, referred to herein and constituting a part hereof, illustrates one embodiment of the invention, and together with the description, serves to explain the principles of the invention.

Figures 1 and 2 show two constructional forms of the invention, wherein a synchronous motor is employed as the driving mechanism.

Receiving devices embodying the invention are applicable to the remote control of counting mechanisms of electric multiple tariff meters,

the switching-on and off of lighting networks,

the synchronization of clocks, and are also applicable to the'control of many other kinds of operations. l

In accordance with the invention a contact arm of a contact selector is driven after the first interruption of the circuit by a driving mechanism running at a constant speed, making a quite definite motion and held without potential,

by means of a contact relay energized by the network potential from an adjustable point of the selected length or period of time, and receives I potential after the second interruption of the circuit. The contact selector can be connected through its contact arm and through a back contact of the relay (i. e., a contact on which the movable tongue normally rests) tor of the network, and the device to be controlled connected to at least one selector contact of the relay corresponding to the associated length or period of time between two interruptions. The driving means for the contact selector may be a synchronous motor, oil-normal, or restoring switch controlled by the contact selector. The winding of the contact relay may be connected on one side to one conductor of the network and on the outer side through its operating contact to the other network conductor, and also from time to time to so that contact of the contact selector that is just to one conducwhich. is controlled by an.

ahead of a contact connected to the device to be controlled; or this contact relay may operate with delayed attraction, the winding of the relay being connected directly to the network.

Referring now to the exemplary embodiment of Fig. l, I is the contact selector of the receiving device; contact arm 2 is connected to aback contact 3 of arelay 4; theinitial contact 5 is connected on one side through oil-normal switch I to one network conductor A and on the 1. other side through an excitingwinding 6 of a synchronous motor I to the network conductor B; contacts 9 to II are connected to winding I2 and to a holding contact I3 of therelay 4; also contacts I4, I5 are each connected through a winding I6, II of a tilting relay III to network conductor B. A movable contact I9 ofrelay 4, coacting with holding contact I3 andback contact 3 and controlled by winding I2, is connected to network conductor A. Tilting relay I8 controls a change-overcontact arm 24 coacting withcontacts 22, 23.

In the diagram of connections shown in Figure 1 it is assumed that network A, B is interrupted.Synchronous motor 1 and consequently also con- 25 tact selector I are then at rest. On switching in the alternating current network A, B circuit A, I9, 3, 2, 5, 6, 15 receives current. Synchronous motor I is thereby set in operation and will start contact arm 2 of contact selector I rotating. Shortly after synchronous motor I is started the off-normal switch 9 is closed, so that the supply of current to winding 6 of synchronous motor I is now effected through this switch. As soon as contact arm 2 comes on to contact 9,relay 4 is 35 energized through circuit A, I9, 3, 2, 9, I2, B. Its movable contact I9 is thereby raised fromcontact 3, and brought into connection with holding contact I3. Thus primarily a holding current circuit A, I9, I3, l2, B is completed forrelay 4, so that 40 the latter remains energized even when contact arm 2 slides away from contact 9. In the second place contact arm 2 is now.without potential.

As soon as contact arm 2 reaches contact I4, a short second interruption of network A, B is 45 effected from the transmitter (not shown). Therelay 4 is therefore de-energized, whereby movable contact I9 drops and comes into engagement withcontact 3. After the switching in again of the network A, B contact arm 2 of con- 50 tact selector I again receives potential. Since the arm 2 is still on contact I4, winding I6 of tilting relay I8 is energized. The change-overcontact arm 24 is consequently moved fromcontact 23 and connected to contact 22. Thus the conductor connected to change-overcontactjarm 24 is connected to the conductor connected to contact 22. For example, by this actuation of the tilting relay l8 the change over of the counting 50 mechanism of a multiple tariff meter to low tarifl' can be effected.

Therelay 4 is again energized, contact arm 2. of contact selector contact I0. Movable contact I9 is attracted, whereby contact arm 2 is again without potential. Therefore, since there is no interruption of the network A, B, winding II of tilting relay I8 is not energized when contact arm 2 comes on to contact I5. On reaching zero position of the contact arm 2, the off-normal switch 8 is again opened and thesynchronous motor 1 thereby stops. Since the network remains switched in,relay 4 will still hold movable contact I9 on holding contact I3.

from high When the next interruption of the circuit is effected from the transmitter, movable contact I9 will drop from holding contact I3 and engagecontact 3. As the two circuit interruptions are only momentary and of extremely short duration, the synchronous motor will easily coast by during the interruption of power and continue to run. At this point, it may be stated that the subject matter of this invention is used in power circuits where the currents carried are not too heavy to render the system impractical. After this first interruptionsynchronous motor 1 is energized and therewith off-normal switch 8 is closed. Contact arm 2 is now turned by the synchronous motor I and will finally reach contact 9, wherebyrelay 4 is energized and will remain energized by the closing of the holding contact I3. Contact arm 2 is then again without potential. When the second short interruption of the network A, B is eifected on the arrival of contact arm 2 on contact I5,relay 4 is again denergized, so that movable contact I9 comes into engagement withback contact 3. On the restoration of the network potentiaLwinding I! of the tilting relay is now energized. Thechangeover contact arm 24 of tilting relay I8 is then brought on to contact 23. The counting mechanism of the multiple tariff meter is now changed over from low to high tariff. As soon as contact arm 2 comes into engagement with contact II,relay 4 is again energized. It then remains energized up to the next interruption of the network A, B, and contact arm 2 remains without potential. In the zero position, contact arm 2 of selector I opening of the Any accidental interruptions of network A, B after restoration of the network potential result in nothing more than idle rotation of contact arm 2. If for example, an interruption of network A, B occurs after the switching in again thereof, contact arm 2 is set in rotation. As soon, however, as it arrives on contact 9;relay 4 which was de-energized on the interruption is again energized, and thereby contact arm 2 is rendered without potential. In the sliding of the contact arm 2 on to contacts I4, I5 no energization of windings I6, I 1' of tilting relay I8 can therefore take place. It may then happen that just at this moment a further interruption of network A, B occurs of a duration which is equal to or less than the selected interruption. This is however not to be assumed, and under practical operating conditions rarely, if ever, happens.

The constructional form according to Figure 2 corresponds essentially to the arrangement according to Figure 1. In Fig.2, however, instead of the relay with an automatic holding contact,

aaoaesa whereupon the I comes on to tors A, B.

a relay with .delay a relay of this kind is employed, it is unnecessary to connect contacts 9 to I I of contact selector I to winding I2 and to a contact I3 of relay 4 (Figure 1) Insuch case it is possible to arrange the remote control system for a larger number of.remote controlled operations than when receiving devices according to Figure 1 are employed. The winding I2 ofrelay 4 is here connected directly across the two network conduc- On the restoration of the network'potential after interruption, movable contact I9 ofrelay 4 is not-immediately removed 'fromcontact 3, but only after atime, which insures with certainty the starting of synchronous motor 'I and closure of the off-normal switch 8. Any further description of the method of operation of the arrangement according to Figure 2 is not necessary, since the. latter corresponds essentially to that of the arrangement of Figure 1.

action is employed. when.

The invention in its broader aspects is not.

limited to the specific mechanisms shown and described but departures may be made therefrom within the scope of the accompanying claims Without departing from the principles of the invention and tages.

WhatI'claim is: '1.,A.circuit selector associated with a normally closed power supply network and responsive to the period of time elapsing between two successive momentary interruptions of the network, comprising 'a constant speed electric motor to be energized from the network, a plurality of contacts, a wiper driven by said without sacrificing its chief advan-.

motor and passing successively over said 0011- tacts, a relay, connections whereby the relay is energized from the network when the network is closed, connections from the network to the motor for initially energizing the motor and moving the wiper from initial position, said connections including the wiper, one of the selector contacts insaid initial position and a back contact of the relay, means for connecting the motor to the including the back contact of the relay, the wiper and respective other of said will accomplish selection.

2. The combination as claimed inclaim 1, said means for delaying the opening of the motor connections through the back contact of the relay including a circuit established through the back contact of the relay, the wiper, another 3. The combination as claimed inclaim 1, wherein the delaying of the opening of the motor connections through the back contact of the relay upon reclosure of the network to allow the motor to meanwhile move the wiper from its initial position, is accomplished by making said relay of the delay or retarded action type.

WERNER KOENIG.

contacts whereby the second momentary opening of the network

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