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Publication numberUS3794888 A
Publication typeGrant
Publication dateFeb 26, 1974
Filing dateSep 27, 1972
Priority dateOct 1, 1971
Also published asCA964756A1
Publication numberUS 3794888 A, US 3794888A, US-A-3794888, US3794888 A, US3794888A
InventorsT Hisano
Original AssigneeMatsushita Electric Works Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Remote control switch circuit
US 3794888 A
Abstract
A remote control switch circuit for switching on and off an associated load with a remote control relay operated by one of a plurality of remote control switches which is actuated independently of others. The circuit comprises a series circuit of a remote load section including the remote control relay connected to the load and normally closed and normally opened contacts connected in series through a pair of reversely connected diodes to the relay and a first operating switch section including the remote control switch for initiating and interrupting current fed to a polar relay and normally closed and normally opened contacts connected in series through a pair of reversly connected diodes to the switch, and an AC source providing source voltage to said series circuit. Other operating switch section or sections will be connected to said first section in parallel relation thereto.
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Description  (OCR text may contain errors)

Hisano -4 1 Feb. 26, 1974 REMOTE CONTROL SWITCH CIRCUIT [75] lnventorz Tsuyoshi l-lisano, Tsu, Japan [73] Assignee: Matsushita Electric Works, Ltd.,

Osaka, Japan 22 Filed: Sept. 27, 1972 [21 Appl. No.: 292,604

[30] Foreign Application Priority Data [58] Field of Search... 317/136, 137, 150, 157, 139, 317/140; 340/147 R, 147 TN, 176; 307/114, 140, 143, 127, 138,146

[56] References Cited UNITED STATES PATENTS 3,273,024 9/1966 Sherman 317/157 3,201,754 8/1965 Reiner et a1. 317/150 FOREIGN PATENTS'OR APPLICATIONS Japan 317/150 Primary Examiner-J. D. Miller Assistant Examiner-Harry E. Moose, Jr.

Attorney, Agent, or Firm-Wolfe, Hubbard, Leydig, Voit, & Osann, Ltd.

[57] ABSTRACT A remote control switch circuit for switching on and off an associated load with a remote control relay operated by one of a plurality of remote control switches which is actuated independently of others. The circuit comprises a series circuit of a remote load section including the remote control relay connected to the load and normally closed and normally opened contacts connected in series through a pair of reversely connected diodes to the relay and a first operating switch section including the remote control switch for initiating and interrupting current fed to a polar relay and normally closed and normally opened contacts connected in series through a pair of reversly connected diodes to the switch, and an AC source providing source voltage to said series circuit. Other operating switch section or sections will be connected to said first section in parallel relation thereto.

2 Claims, 18 Drawing Figures PAIEN IEB FEB 2 6 i974 SHEEI 5 OF 6 mm n6 QM um EATENTEDFEBZB mm 3.794' 888 sum 8 or e 1 REMOTE CONTROL SWITCH CIRCUIT This invention relates to a remote control switch circuit wherein a remote control relay is independently operated by either one of remote control switches provided in several places to switch on and off a load.

Conventional remote control switchs of this kind have defects that they are of a very complicated formation, that, when the remote control relay circuits increase, the wirings will be complicated and that, when the number of indicating lamps increases, the life of the auxiliary contact of the remote control relay will reduce since the lamp current will flow through the auxiliary contact. The present invention has been suggested to remove these defects.

Principal object of the present invention is to provide a remote control switch circuit wherein loads can be steppedly remote-controlled by a simple combination of circuit elements.

Another object of the present invention is to provide a remote control switch circuit wherein, even if the number of indicating lamps increases, the life of the auxiliary contact of the relay will not be reduced.

A further object of the present invention is to provide a remote control switch circuit wherein the wiring can be simplified. v I

The present invention shall be explained in the fol lowing with reference to accompanying drawings, in which:

FIG. I shows an embodiment of the remote control switch circuit of the present invention.

FIGS. 2A-2G are time charts for explaining the operation of the circuit of FIG. 1.

FIG. 3 is a block diagram showing a wiring of a plurality of the circuitry systems in FIG. 1.

FIG. 4 shows a further improved embodiment of the remote control switch circuit of the present invention.

FIGS. 5A-5G are time charts for explaining the operation of the circuit of FIG. 4.

FIG. 6 is a block diagram showing a wiring relation in the case of wiring a plurality of the circuitry systems in FIG. 4.

In FIG. I showing a remote control switch circuit of the present invention, Ac is an alternating current source, A, is a remote control relay circuit, that is, a re mote load section and B, to B remote control switch sections or operating switch sections. Referring further to the formation of the remote control relay circuit A,, Ry is a first polar relay coil, r, and r, are contacts to be set ON and OFF by the operation of the relay coil Ry, D and D' are diodes and r,,, r, and r are contacts forming the contact r,. Referring next to the formations of remote control switch section B,, S, is a change-over switch, S, and S, are contacts, R1, is a second polar relay for making a switching operation depending on the direction of the current, R1, is its contact, la and lb are contacts, D, and D, are diodes and L, is an indicating lamp. The polar relay R1, in the present instance is so formed that, when the current flows in the direction indicated by the arrow a, the contact Ia will close and, when the current flows in the direction indicated by the arrow b, the contact lb will close. The formations of the respective sections B and B are also the same as of the section B,.

In this circuit, when any of the remote control switch sections B, to B is operated, the remote control relay Ry will be controlled and the contact r will be set ON or OFF so that the load will be switched on or switched off.

Now, the operation of the circuit of the present invention shall be explained in detail. In the state shown in FIG. 1, the remote control relay Ry is not in operatron.

If, for example, the switch S, is operated so that the contact S,,, will be ON and S,, will be OFF (see FIG. 2A), aclosed circuit of Ac r n, D Ry S b, Ac will be formed and the contact r of the relay Ry will be set ON (see FIG. 2G). Then, if the remote control relay Ry operates, the contact r, will be switched so that r will be ON and r,, will be OFF (see FIG. 2C) and a current will flow through the diodes D, and D to. light the indicating lamp L,.

Next, if the switch S, is operated so that the contact 8,, will be OFF and S Will be ON, a current will flow through a closed circuit of Ac R1, S,,,'- Ry D r, r Ac from the current source Ac and, as the direction of this current is the direction indicated by the arrow a, the contact of the relay RI, will be switched so that the contact la will be ON and 112 will be OFF (see FIG. 2D). Thus the next operation is prepared.

Then, if the switch S, is operated so that the contact 8,, side will be again ON, a current will flow through a circuit of Ac D, la S, Ry D r,, r,. Ac from the current source Ac, the remote control relay Ry will reverse as in FIG. 2B, the contact r,, will be OFF, n, will be ON, no current will flow through the remote control relay Ry and thus no current will flow through the indicating lamp L, which will go out as shown in FIG. 2F. Then, if the switch S, is operated so that the contact 8,, side will be ON, a current in the direction indicated by the arrow 12 will flow through the polar relay RI, and the contact of the polar relay R1, will be switched over to the b side.

' Such operations as in the above are made. In this system, as the current indicating lamps L, to L, are respectively connected in series with the remote control relay Ry, if many indicating lamps are connected, a large current will flow through the remote control relay Ry and errors will be likely to be caused. Therefore, it is necessary that only such number not interfering with the operation of the remote control relay Ry as, for example, two lamps L, and L of the remote control switch sections B, and B should be connected in series but the third lamp L should be connected so as not to be in series with the remote control relay Ry. Therefore, the lamp L is connected with the connecting point of the contact r of the remote control relay Ry and the diode D by using a lead wire 1. However, there are defects that, for example, as shown in FIG. 3, in the case of the three circuits of the remote control relays A, to A the number of wirings will increase by the number of the remote control relay circuits, therefore, the connection of the thirdswitch section B,, will be complicated, the current flowing through the lamp will flow to the auxiliary contact of the remote control relay Ry and therefor the life of the auxiliary contact will reduce. The circuit system in FIG. 4 has been suggested to improve these defects.

In FIG. 4 showing a further improved embodiment of the present invention, A, is a remote control circuit, and B, to 8,, are operating switch sections. The relay 3 Ry, polar relays R1 to R1 switches S, to S lamps L to L diodes and relay contacts used to form A, and B to B are represented respectively by the same corresponding numerals as in FIG. 1. The feature of this circuit system is that the diodes D to D are connected in series with the lamps L to L The diodes D and D are connected between such number not interfering with the operation of the remote control relay Ry as, for example, two lamps L and L of the remote control switch sections B and B and contacts and 2c (movable contacts of the polar relays R1 and R1 and the lamp L of the rest remote control switch section B is connected through the diode movable contact r side (one end of the current source 'Ac) of the switching auxiliary contact r of the remote control relay Ry and the movable contact 3c of the switching contact R1 of the polar relay R1 The other formation is the same as in the case of FIG. 1 and the operation is also exactly the same as in FIG. 1. FIG. 5 shows a time chart of the present invention.

In the present invention, as described above, as the current of the indicating lamps flowing through the auxiliary contact of the remote control relay .Ry is not larger than for two lamps, even if the number of lamps increases, the life of the auxiliary contact will not be reduced. Further, shown in FIG.. 6, as the electric wire corresponding to l in FIG. 3 can be made only a single electricwire lo, the third switch section 8;; will be also of the same number of wirings as of the first and second switch sections B, and B and the wirings can be simplified.

What l claim is:

l. A remote control switch circuit comprising the combination of a. a remote load section comprising 1. a first polarized relay coil for operating the contacts of a load, 2. a pair of oppositely facing diodes connected in D between the.

parallel, with each other with one end of the parallel diodes connected to said coil,

3. and a switch operated by said first polarized relay coil and connected to the other end of the parallel diodes for connecting alternate ones of said diodes in series with said coil in response to energization of said coil by signals of alternate polarities,' V I b. and at least one operating switch section comprising 1. a second polarized relay coil 7 2. a second pair of oppositely facing diodes connected in parallel with each other and with said second coil,.

3. a manually operated switch connected in series with said first polarized relay coil for connecting either said second coil or the second pair of di odes in series with said first coil,

4. a switch operated by said second polarized relay coil connected between said manually operated switch and said second' pair of diodes for connecting alternate onesof said second pair of diodes in series with said manually operated switch in response to energization of said second coil by signals of alternate polarities,

5. and an indicating lamp connected in series with said first polarized relay coil and at least one of the diodes in said second pair.

c. and an a-c source connected across said remote load section and said operating switch section. 2. A remote control switch circuit as set forth in claim 1 which includes a plurality of said operating switch sections in at least one of which the indicating lamp is connected in series with at least one of the diodes in said second pair and said a-c. source, and including a further diode connected in series with said indicating lamp.

' =i =l l

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3201754 *May 10, 1962Aug 17, 1965Aircraft Armaments IncRemote control and indication system
US3273024 *Dec 11, 1963Sep 13, 1966Weyerhaeuser CoImpulse relay
JP45007100A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4213059 *Aug 28, 1978Jul 15, 1980Pdm Electrical Products Ltd.Power switching circuit
US4367510 *May 14, 1981Jan 4, 1983Fuji Electric Co., Ltd.Remote control switch device
US4408250 *Jun 22, 1981Oct 4, 1983Matsushita Denko Kabushiki KaishaCircuit for remotely operating an electromagnetic relay
US4833339 *Oct 25, 1985May 23, 1989Lutron Electronics Co., Inc.Load control system
US5049876 *Jul 10, 1989Sep 17, 1991Honeywell Inc.Data communication system
US5382836 *Dec 21, 1992Jan 17, 1995Shinkoh Electric Co., Ltd.Push-button switch device
US5473203 *Sep 30, 1994Dec 5, 1995Shinkoh Electric Co., Ltd.Push-button switch device
US5874789 *Feb 6, 1997Feb 23, 1999Su; Chih-HaiCircuit for integrating a local switch and a remote-control switch
US5986358 *Jul 15, 1998Nov 16, 1999Gen-Home Technology Co. Ltd.Remotely controllable wall switch
Classifications
U.S. Classification361/208, 307/114, 340/12.54, 340/12.15
International ClassificationH01H47/32, H04Q9/08, H01H9/54, H01H3/28
Cooperative ClassificationH01H3/28
European ClassificationH01H3/28