US3761738A - Remote control electrical circuit - Google Patents

Remote control electrical circuit Download PDF

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Publication number
US3761738A
US3761738A US00183842A US3761738DA US3761738A US 3761738 A US3761738 A US 3761738A US 00183842 A US00183842 A US 00183842A US 3761738D A US3761738D A US 3761738DA US 3761738 A US3761738 A US 3761738A
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US
United States
Prior art keywords
switching means
high voltage
control
transistor
electrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00183842A
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English (en)
Inventor
A Kay
S Messin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SWITCHPACK SYSTEMS Inc
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SWITCHPACK SYSTEMS Inc
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • H03K17/725—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for ac voltages or currents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H01B7/0815—Flat or ribbon cables covered with gluten for wall-fixing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • H03K17/722—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region with galvanic isolation between the control circuit and the output circuit
    • H03K17/723—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region with galvanic isolation between the control circuit and the output circuit using transformer coupling

Definitions

  • the invention disclosed involves an electrical control [52] Q- 307/252. circuit wherein a relatively low voltage is used to cong Y 317/1485 B trol a relatively high voltage and includes switching [51] Ilit. Cl. "01h 47/32- means in the low voltage Circuit and means responsive [-58] held of Search" 307/140 1 106; i to said switching means for generating a low voltage 17 4 B pulse upon closing said switch, and switching meansin v 1 the high voltage circuit responsive to the low voltage [56] R pulse to become conductive.
  • Our invention relates to a remote control switching electrical circuit. It is particularly applicable to low voltage switching controls for domestic and commercial use wherein a relatively low voltage and current can be used for controlling relatively high voltage and- /or heavy current electrical circuits.
  • a low voltage push button for energizing a solenoid to control a switch in.
  • a relatively high voltage circuit such as incandescent lights in lighting circuits.
  • uch circuits have usually taken the form of a source of low voltage such as from a step-down, transformer, a solenoid coil connected to said source of low voltage and a push button switch interposed in series between the secondary of the step-down transformer and the solenoid.
  • the solenoid mechanically actuates an on-of switch in series in the high voltage circuit.
  • One of the primary objects of our invention is to provide a remote control system, which uponclosing the remote control switch button, generates a pulse for the operation of the remote solenoid, but will not continue to energize the solenoid even though the push button switch remains closed.
  • a further disadvantage of the heretofore known remote control circuits lies in the fact that the current in the remote control switch must be large enough and of sufficiently high voltage to operate the solenoid.
  • a further advantage of our system lies in the fact that a much lower voltage and extremely low current can be used at the point of remote control than has heretofore been possible.
  • FIG. 1 is a schematic representation of an electrical circuit adaptable for use in our invention.
  • FIG. 2 is a sine wave representing the alternating current input into the control circuit.
  • FIG. 3 is a distorted sine wave representing the form of the current at an intermediate point in the control circuit.
  • FIG. 4 is a representation of the pulse which actuates the solenoid.
  • FIG. 5 is a modified form of control circuit embodying the principles of our invention.
  • high voltage circuit comprising conductors and 11. It will be understood that the term high voltage is relative to distinguish it from the-relatively lower voltage control cir cuits. Normally in an incandescent lighting circuit the high voltage circuit would be 110 volts.
  • the first control circuit comprises a step-down transformer T-l having its primary coil 12 connected across the conductors 10 and 11.
  • a resistor 13 may be provided in series with said coil 12.
  • the step-down transformer T-l is provided with a secondary or output coil 15 having terminals 16 and 17.
  • the output circuit of the transformer T-ll comprises a circuit having a normally open push button switch 18, a rectifier 19, a capacitor 20 and an isolating transformer T-2 through primary coil 21 and terminals 22 and 23.
  • a resistor 24 is connected in shunt across the capacitor 20 and isolating transformer T-2.
  • Isolating transformer T-2 has secondary coil 26 having output terminals 27 and 28.
  • the output terminals 27 and 28 of coil 26 are connected to an electronic gate or electrical valve such as triac 30.
  • a solenoid coil31 is connected in series with the gate 30 across the high voltagelines 10 and 11 by means of conductors 32, 33 and 34.
  • the solenoid 31 is mechanically connected to an electromechanical switching device such as 35, preferably of a ratchet type so that each pulse, or actuation of the solenoid 31 will actuate the switching mechanism to successively make or break the electrical connection between the high voltage line 10 and the switch output terminal 36. It will be understood that the electrical device being energized or controlled by means of the switching device 35 will be connected across the terminals 36 and 37.
  • an alternating current of relatively high potential is applied across the terminals l0 and 11.
  • the high potential current has a sine wave form such as illustrated in FIG. 2.
  • the resistor 13 performs a dual function in that it reduces the voltage across the primary coil 12 and also distorts the wave form to accentuate the peak of each alternating pulse such as in FIG. 3.
  • the first half wave cycle from coil 15 which passes through rectifier 19 substantially fully charges capacitor 20
  • the first half-wave pulse results in a relatively large pulse from the secondary coil 26 which is sufficiently large to turn on the gate 30. Because of the charged condition of capacitor 20, each successive half-wave through the rectifier 19 results in a successively diminishing pulse from coil 26 such as illustrated in FIG. 4.
  • capacitor 20 Upon opening switch 18 capacitor 20 will be discharged through resistor 24. Resistor 24, of course, will be of sufficient resistance to prevent an excessively fast discharge of capacitor 201.
  • the switch 18 can assume the form of a switch plate or pressure responsive switch which is adapted to actuate the solenoid switch 35 by being touched or pushedflt will be further apparent that we have eliminated one of the primary problems in connection with heretofore known touch-plate systems, in that, regardless of how long a user keeps switch 18 closed, there is no danger that the solenoid coil can overheat.
  • FIG. 5 illustrates a modified form of a control circuit. Similar numbers in FIGS. 5 and 1 are intended to indicate similar parts. In this modification there is also a source of high voltage and 11.
  • a resistor 40and Zener diode 41 are connected in series across the source of high voltage 10 and 11 to thereby generate a low voltage square wave form across the Zener diode.
  • a capacitor 42 is connected in series with resistor 43, control switch 44 and resistor 45 in shunt across the Zener diode 41.
  • the capacitor 42 differentiates the square wave form from the Zener diode 41 into sharp pips, such as 47, at the front and trailing edge of the square wave form.
  • a diode 49 is connected to the high voltage source 10 through resistor 40 and to collector 51 through resistor 50 and to high voltage source 11 through capacitor 52.
  • the diode 49, resistor 50 and capacitor 52 form a half wave power supply for transistor T-3.
  • Capacitor 42 is connected to the base 55 of transistor T-3 in series with diode 56.
  • the emitter of transistor T-3 is also connected to the source of high voltage 11 through resistor 54 and to the'electronic gate, or triac 30 through diode 57.
  • resistor 40 limits the voltage across the Zener diode 41 to any desired low voltage, and generates a square wave form potential, which, together with capacitor 42 produces sharp pulses such as 47 at the leading and trailing edge of the square wave form.
  • Diode 49, resistor 50 and capacitor 52 form a half wave power supply.
  • capacitor 42 remains charged and no current flows until resistors 43 and 45 are connected in a return path by means of switch 44.
  • positive pulses trigger transistor T-3 through diode 56.
  • capacitor 52 discharges through transistor T-3, most of the discharge occuring on the first pulse. So long as switch 44 remains closed, no further charge of capacitor 42 is possible.
  • the trigger pulse at the triac gate 30 is occuring at the same time the line voltage is increasing at the triac anode.
  • the gate 30 (or triac) turns on for the duration of the half-cycle of the A-C power thereby actuating the solenoid to turn the switch to on or off positions.
  • Maximum pulse amplitude occurs upon discharge of capacitor 52 coincident with the first pulse from transistor T-3.
  • the time constant of resistor 50 and capacitor 52 is such that capacitor 52 cannot charge sufficiently between pulses to sustain 5 constant triggering of the gate of-triac 30.
  • An electrical circuit adapted to actuate relatively high voltage electrical switching means comprising:
  • pulsing means rendered operative at one condition of said control switching means for providing to said electronic switching means only one control pulse of said magnitude while said control switching means is maintained in said one condition.
  • said pulsing means includes a transistor having its emitter electrode connected to provide pulses to said electronic switching means, circuitry connected between the base of the transistor and said control switching meansfor rendering said transistor conductive only while said control switching means is in said one position, a capacitor connected to the collector of the transistor to be discharged when the transistor is rendered conductive, and circuit means connected to said consenser to fully charge the same only when the transistor is non-conducting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electronic Switches (AREA)
  • Relay Circuits (AREA)
  • Keying Circuit Devices (AREA)
  • Selective Calling Equipment (AREA)
  • Control Of Electrical Variables (AREA)
  • Power Conversion In General (AREA)
US00183842A 1971-09-27 1971-09-27 Remote control electrical circuit Expired - Lifetime US3761738A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18384271A 1971-09-27 1971-09-27

Publications (1)

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US3761738A true US3761738A (en) 1973-09-25

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ID=22674524

Family Applications (1)

Application Number Title Priority Date Filing Date
US00183842A Expired - Lifetime US3761738A (en) 1971-09-27 1971-09-27 Remote control electrical circuit

Country Status (11)

Country Link
US (1) US3761738A (pt)
JP (1) JPS4841242A (pt)
AR (1) AR194615A1 (pt)
BR (1) BR7206689D0 (pt)
CA (1) CA960348A (pt)
DE (1) DE2247336A1 (pt)
FR (1) FR2154649B1 (pt)
GB (1) GB1375769A (pt)
IT (1) IT975087B (pt)
SE (1) SE388968B (pt)
ZA (1) ZA726022B (pt)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280164A (en) * 1979-07-24 1981-07-21 Ims Ltd. Fail-safe relay system
US6700225B1 (en) * 1999-10-05 2004-03-02 Thomas C. Barmore Digital electronic switching systems
GB2396065A (en) * 2002-11-01 2004-06-09 Stephen John Foxwell Lighting control
GB2457014A (en) * 2008-01-29 2009-08-05 David Eric Hampden-Smith Bathroom switch
CN101895286B (zh) * 2009-05-21 2013-10-23 吴涛 串联式单联双联触摸遥控轻触遥控系列电子开关

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5232547A (en) * 1975-09-09 1977-03-11 Omron Tateisi Electronics Co Three phase solid relay
JPS53113995U (pt) * 1977-02-21 1978-09-11
US4121113A (en) * 1977-04-11 1978-10-17 Tektronix, Inc. Electric switch
FR2555840A1 (fr) * 1983-11-25 1985-05-31 Heuliez Dea Commutateur de courant alternatif de securite sans alimentation auxiliaire
DE102011010475B3 (de) * 2011-02-05 2012-02-16 Atlas Elektronik Gmbh Weckschaltung, Weckschaltungsanordnung und Weckverfahren zum Aktivieren einer elektrischen oder elektronischen Funktionsgruppe
CN113862459B (zh) * 2021-09-28 2022-09-06 上海交通大学 高频电脉冲辅助表面微锻装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527957A (en) * 1968-05-31 1970-09-08 Minnesota Mining & Mfg Solid state remotely controlled circuit using control pulses
US3558995A (en) * 1967-08-24 1971-01-26 Cutler Hammer Inc Bidirectional thyristor switching on-off control systems for an inductive load
US3609457A (en) * 1969-05-29 1971-09-28 Texas Instruments Inc Thermal protective system utilizing fault-responsive shunt means for a normally conducting triac

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182228A (en) * 1962-03-05 1965-05-04 Gen Motors Corp Circuit for repeatedly energizing a load
US3434026A (en) * 1966-12-12 1969-03-18 Fastener Corp Electrically operated reciprocating tool
US3530305A (en) * 1969-04-01 1970-09-22 Westinghouse Electric Corp Single pulse generator
US3662190A (en) * 1969-06-16 1972-05-09 Fastener Corp Control circuit for single stroke electrical tools

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3558995A (en) * 1967-08-24 1971-01-26 Cutler Hammer Inc Bidirectional thyristor switching on-off control systems for an inductive load
US3527957A (en) * 1968-05-31 1970-09-08 Minnesota Mining & Mfg Solid state remotely controlled circuit using control pulses
US3609457A (en) * 1969-05-29 1971-09-28 Texas Instruments Inc Thermal protective system utilizing fault-responsive shunt means for a normally conducting triac

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4280164A (en) * 1979-07-24 1981-07-21 Ims Ltd. Fail-safe relay system
US6700225B1 (en) * 1999-10-05 2004-03-02 Thomas C. Barmore Digital electronic switching systems
GB2396065A (en) * 2002-11-01 2004-06-09 Stephen John Foxwell Lighting control
GB2396065B (en) * 2002-11-01 2005-12-28 Stephen John Foxwell Lighting control
GB2457014A (en) * 2008-01-29 2009-08-05 David Eric Hampden-Smith Bathroom switch
CN101895286B (zh) * 2009-05-21 2013-10-23 吴涛 串联式单联双联触摸遥控轻触遥控系列电子开关

Also Published As

Publication number Publication date
DE2247336A1 (de) 1973-04-12
AR194615A1 (es) 1973-07-31
AU4715272A (en) 1974-04-04
ZA726022B (en) 1973-07-25
SE388968B (sv) 1976-10-18
FR2154649B1 (pt) 1978-02-10
FR2154649A1 (pt) 1973-05-11
GB1375769A (pt) 1974-11-27
BR7206689D0 (pt) 1973-08-23
JPS4841242A (pt) 1973-06-16
CA960348A (en) 1974-12-31
IT975087B (it) 1974-07-20

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