Patent US3961183A successfully refreshed from Google Patents.
US3961183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-responsive electric switch
Assignee: FABRIQUE D HORLOGERIE LA VEDETTE SA
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Filing: 1975-02-03
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Granted: 1976-06-01
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Expires: 1995-02-03
Abstract
Abstract A light-responsive electric switch is composed on the one hand by an electronic circuit constituted, in the case of direct-current supply, by a voltage divider comprising a fixed resistor and a variable resistor forming the photo-conductive cell, by four transistors which are blocked or rendered conductive according to the illumination of the photo-conductive cell, by a change-over switch transmitting the voltage to another transistor into the collector circuit of which a motor is connected, and on the other hand by an electro-mechanical device constituted by a bistable trigger circuit controlling the motor, by a step-down gearing meshing with a pinion fixed on the shaft of this motor, by cams fast with the shaft of the final pinion of the step-down gearing and by one or more contacts which close or interrupt one or more lighting circuits.
Inventors
- 👤 Guy Dubot
- 👤 Jacques Lemercier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:20
CPC Classifications
H; H05; H05B; H05B47/00; H05B47/10; H05B47/105; H05B47/11; H05B47/16; Y; Y02; Y02B; Y02B20/00; Y02B20/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
A light-responsive electric switch, comprising an electronic circuit, means to supply direct current to said circuit, said circuit comprising a voltage divider comprising a fixed resistor and a variable resistor forming a photo-conductive cell, transistors which are blocked or rendered conductive according to the illumination of the photo-conductive cell, a further transistor, a changeover switch transmitting voltage from the first-mentioned transistors to said further transistor, said further transistor having a collector circuit, a motor connected in the collector circuit of said further transistor, said motor having an output shaft having a pinion fixed thereon, step-down gearing meshing with said pinion, cam means rotatable with the final pinion of said step-down gearing, and at least one contact engageable with said cam means for opening and closing at least one lighting circuit.
Claim 2
Dependent Claim
130 words
A light-responsive electric switch, comprising an electronic circuit, means to supply direct current to said circuit, said circuit comprising a voltage divider comprising a fixed resistor and a variable resistor forming a photo-conductive cell, transistors which are blocked or rendered conductive according to the illumination of the photo-conductive cell, a further transistor, a changeover switch transmitting voltage from the first-mentioned transistors to said further transistor, said further transistor having a collector circuit, a motor connected in the collector circuit of said further transistor, said motor having an output shaft having a pinion fixed thereon, step-down gearing meshing with said pinion, cam means rotatable with the final pinion of said step-down gearing, and at least one contact engageable with said cam means for opening and closing at least one lighting circuit.
Claim 3
Dependent Claim
58 words
A switch as claimed in claim 1, said means to supply direct current to said circuit comprising an alternating current supply, two resistors and a capacitor to reduce the voltage of said alternating current supply, a rectifier for rectifying the current from said two resistors and capacitor, and a Zener diode to stabilize the current from said rectifier.
Claim 4
Dependent Claim
22 words
A switch as claimed in claim 1, and a casing housing said switch, said photoelectric cell being fixed directly in said casing.
Claim 5
Dependent Claim
30 words
A switch as claimed in claim 1, and a casing in which said switch is housed, and an orientable antenna articulated to said casing and electrically connected with said circuit.
Claim 6
Dependent Claim
27 words
A switch as claimed in claim 1, and a casing in which said switch is housed, and a timing switch for said circuit mounted in said housing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |