US4091276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote control switching
Assignee: Individual
•
Filing: 1977-01-03
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Granted: 1978-05-23
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Expires: 1997-01-03
Abstract
Abstract Electrical appliances, particularly A.C. operated appliances, are turned on and off from remote locations by shining a beam of light, using a flashlight or the like on a photoelectric transducer/semiconductor switching device interconnected between a power line and the appliance, the switching device being bi-stable, activatable for either switch-on or switch-off operations by a signal from a single photoelectric transducer, and further comprises delay means responsive to the occurrence of a switch-on or switch-off operation to prevent a subsequent switching operation until a number of seconds have elapsed to allow for variations of human response in handling of the activating light beam, thereby preventing on and off chattering.
Inventors
- 👤 Victor Lebovici
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:51
CPC Classifications
G; G08; G08C; G08C23/00; G08C23/04; H; H01; H01J; H01J40/00; H01J40/02; H01J40/14; H03; H03K; H03K17/00; H03K17/28; H03K17/292; H03K17/51; H03K17/56; H03K17/72; H03K17/725; H03K17/78; H03K17/79; H05; H05B; H05B47/00; H05B47/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
174 words
An electrical control system comprising means defining a load, an A.C. outlet connected to a source of A.C. power, bi-directional thyristor switching means, in series betwen the load and outlet and further comprising a control for said thyristor comprising, a flip-flop having one output coupled to said thyristor swtiching device for maintaining said thyristor conductive and nonconductive when in first and second respectively of its two stable states, a single photoelectric transducing device, first and second NAND gate means for coupling said photoelectric transducing device to said flip-flop to shift the flip-flop from one of its stable states to the other when the signal provided by said photoelectric transducer exceeds a predetermined threshold level so that successive exposures of the photoelectric transducing device to light exceeding the level will change the conductive or nonconductive state of the thyristor, and delay means responsive to the occurrence of a change in the stable state of said flip-flop for preventing a subsequent change in the stable state of said flip-flop until a number of seconds have elapsed.
Claim 2
Dependent Claim
174 words
An electrical control system comprising means defining a load, an A.C. outlet connected to a source of A.C. power, bi-directional thyristor switching means, in series betwen the load and outlet and further comprising a control for said thyristor comprising, a flip-flop having one output coupled to said thyristor swtiching device for maintaining said thyristor conductive and nonconductive when in first and second respectively of its two stable states, a single photoelectric transducing device, first and second NAND gate means for coupling said photoelectric transducing device to said flip-flop to shift the flip-flop from one of its stable states to the other when the signal provided by said photoelectric transducer exceeds a predetermined threshold level so that successive exposures of the photoelectric transducing device to light exceeding the level will change the conductive or nonconductive state of the thyristor, and delay means responsive to the occurrence of a change in the stable state of said flip-flop for preventing a subsequent change in the stable state of said flip-flop until a number of seconds have elapsed.
Claim 3
Dependent Claim
85 words
The improvement in accordance with claim 1 wherein the flip-flop has set and reset inputs and the said first and second NAND gates have outputs coupled to said set and reset inputs respectively and having a pair of input legs with the first leg of each connected together and to said photoelectric transducing means and the second of each coupled to respective outputs of said flip-flop, said delay means comprising respective capacitors connected to each second input leg of said first and second NAND gates.
Claim 4
Dependent Claim
33 words
The improvement in accordance with claim 2 wherein the means for coupling respective outputs of said flip-flop to a NAND gate second input leg is a resistor shunted by a unilaterally conductive device.
Claim 5
Dependent Claim
33 words
The improvement in accordance with claim 1 and further comprising, means defining a solid state indicator light connected to the switch which is turned on to indicate conduction through the semiconductor switching device.
Claim 6
Dependent Claim
197 words
An electrical control system comprising means defining a load, an A.C. outlet connected to a source of A.C. power, bi-directional thyristor switching means, in series between the load and outlet and further comprising a control for said thyristor comprising, a flip-flop having one output coupled to said thyristor switching device for maintaining said thyristor conductive and nonconductive when in first and second respectively of its two stable states, a single photoelectric transducing device, means for coupling said photoelectric transducing device to said flip-flop to shift the flip-flop from one of its stable states to the other when the signal provided by said photoelectric transducer exceeds a predetermined threshold level so that successive exposures of the photoelectric transducing device is light exceeding the level will change the conductive or nonconductive state of the thyristor, and delay means responsive to the occurrence of a change in stable state of said flip-flop for preventing a subsequent change in the stable state of said flip-flop until a number of seconds have elapsed, and wherein the means for coupling said photoelectric transducing element to said flip-flop and for furnishing the delay comprises a monostable multivibrator, and wherein said monostable multivibrator is retriggerable.
Claim 7
Dependent Claim
197 words
An electrical control system comprising means defining a load, an A.C. outlet connected to a source of A.C. power, bi-directional thyristor switching means, in series between the load and outlet and further comprising a control for said thyristor comprising, a flip-flop having one output coupled to said thyristor switching device for maintaining said thyristor conductive and nonconductive when in first and second respectively of its two stable states, a single photoelectric transducing device, means for coupling said photoelectric transducing device to said flip-flop to shift the flip-flop from one of its stable states to the other when the signal provided by said photoelectric transducer exceeds a predetermined threshold level so that successive exposures of the photoelectric transducing device is light exceeding the level will change the conductive or nonconductive state of the thyristor, and delay means responsive to the occurrence of a change in stable state of said flip-flop for preventing a subsequent change in the stable state of said flip-flop until a number of seconds have elapsed, and wherein the means for coupling said photoelectric transducing element to said flip-flop and for furnishing the delay comprises a monostable multivibrator, and wherein said monostable multivibrator is retriggerable.
Claim 8
Dependent Claim
49 words
The improvement in accordance with claim 5 wherein the flip-flop has D and CK inputs with one of its outputs coupled to said semiconductor switching device, said D input coupled to the other output of said flip-flop and the CK input coupled to the output of said monostable multivibrator.
References Cited (Backward Citations)
US3629590A
Cited
US3584222A
Cited
US3758826A
Cited
USRE27393E
Cited
US3767924A
Cited
US3790848A
Cited
US3754177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |