US3870877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static switching control
Assignee: Individual
•
Filing: 1973-10-02
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Granted: 1975-03-11
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Expires: 1993-10-02
Abstract
Abstract An electrically controlled device is switched on and off by light actuated switch modules plugged into electrically interconnected tube sockets to which a source of current is connected. A circuit holding module is removably stacked on one of the switch modules to maintain the controlled device energized until reset by actuation of the other switch module.
Inventors
- 👤 Paul D Tolbird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:08
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/78; H03K17/79
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
154 words
A light responsive control system comprising a source of electrical energy, an electrically controlled device, terminal connecting means interconnecting the source and the device for supply of energizing current to the device, a pair of light actuated switch modules for respectively closing and opening an energizing circuit through said device, and circuit holding means for maintaining said energizing circuit closed upon actuation of one of the switch modules until reset by actuation of the other of the switch modules, said circuit holding means including rectifier means connected to said source for establishing a dc power supply, illumination generating means connected to said power supply for actuating one of the switch modules when energized, light activated, latching switch means connected to the illumination generating means for energizing the same and reset means connecting the latching switch means to the other of the switch modules for unlatching the switch means to deenergize the illumination generating means.
Claim 2
Dependent Claim
154 words
A light responsive control system comprising a source of electrical energy, an electrically controlled device, terminal connecting means interconnecting the source and the device for supply of energizing current to the device, a pair of light actuated switch modules for respectively closing and opening an energizing circuit through said device, and circuit holding means for maintaining said energizing circuit closed upon actuation of one of the switch modules until reset by actuation of the other of the switch modules, said circuit holding means including rectifier means connected to said source for establishing a dc power supply, illumination generating means connected to said power supply for actuating one of the switch modules when energized, light activated, latching switch means connected to the illumination generating means for energizing the same and reset means connecting the latching switch means to the other of the switch modules for unlatching the switch means to deenergize the illumination generating means.
Claim 3
Dependent Claim
154 words
A light responsive control system comprising a source of electrical energy, an electrically controlled device, terminal connecting means interconnecting the source and the device for supply of energizing current to the device, a pair of light actuated switch modules for respectively closing and opening an energizing circuit through said device, and circuit holding means for maintaining said energizing circuit closed upon actuation of one of the switch modules until reset by actuation of the other of the switch modules, said circuit holding means including rectifier means connected to said source for establishing a dc power supply, illumination generating means connected to said power supply for actuating one of the switch modules when energized, light activated, latching switch means connected to the illumination generating means for energizing the same and reset means connecting the latching switch means to the other of the switch modules for unlatching the switch means to deenergize the illumination generating means.
Claim 4
Dependent Claim
154 words
A light responsive control system comprising a source of electrical energy, an electrically controlled device, terminal connecting means interconnecting the source and the device for supply of energizing current to the device, a pair of light actuated switch modules for respectively closing and opening an energizing circuit through said device, and circuit holding means for maintaining said energizing circuit closed upon actuation of one of the switch modules until reset by actuation of the other of the switch modules, said circuit holding means including rectifier means connected to said source for establishing a dc power supply, illumination generating means connected to said power supply for actuating one of the switch modules when energized, light activated, latching switch means connected to the illumination generating means for energizing the same and reset means connecting the latching switch means to the other of the switch modules for unlatching the switch means to deenergize the illumination generating means.
Claim 5
Dependent Claim
19 words
The combination of claim 1 wherein the circuit holding means is removably mounted on one of the switch modules.
Claim 6
Dependent Claim
64 words
The combination of claim 2 wherein the other of the switch modules includes a voltage controlled switch device connected to the reset means of the holding circuit means, photo-resistive means connected to the switch device for actuating the same, and voltage regulating means connected to the dc power supply in the holding circuit means for supply of a constant voltage to the photo-resistive means.
Claim 7
Dependent Claim
57 words
The combination of claim 3 wherein said one of the switch modules includes a quadrac connected in series with the controlled device to said source, storage capacitor means connected to the quadrac for switching the same on and off, and photo-sensing means connected between the source and the capacitor means for controlling the switching of the quadrac.
Claim 8
Dependent Claim
21 words
The combination of claim 4 wherein said terminal connecting means includes a pair of tube sockets respectively receiving the switch modules.
Claim 9
Dependent Claim
94 words
A light responsive control system comprising a source of electrical energy, an electrically controlled device, terminal connecting means interconnecting the source and the device for supply of energizing current to the device, a pair of light actuated switch modules for respectively closing and opening an energizing circuit through said device, and circuit holding means for maintaining said energizing circuit closed upon actuation of one of the switch modules until reset by actuation of the other of the switch modules, said terminal connecting means including a pair of tube sockets respectively receiving the switch modules.
Claim 10
Dependent Claim
94 words
A light responsive control system comprising a source of electrical energy, an electrically controlled device, terminal connecting means interconnecting the source and the device for supply of energizing current to the device, a pair of light actuated switch modules for respectively closing and opening an energizing circuit through said device, and circuit holding means for maintaining said energizing circuit closed upon actuation of one of the switch modules until reset by actuation of the other of the switch modules, said terminal connecting means including a pair of tube sockets respectively receiving the switch modules.
Claim 11
Dependent Claim
19 words
The combination of claim 6 wherein the circuit holding means is removably mounted on one of the switch modules.
Claim 12
Dependent Claim
130 words
A light responsive control system comprising a source of electrical energy, an electrically controlled device, terminal connecting means interconnecting the source and the device for supply of energizing current to the device, a pair of light actuated switch modules for respectively closing and opening an energizing circuit through said device, and circuit holding means for maintaining said energizing circuit closed upon actuation of one of the switch modules until reset by actuation of the other of the switch modules, said one of the switch modules including a quadrac connected in series with the controlleD device to said source, storage capacitor means connected to the quadrac for switching the same on and off, and photo-sensing means connected between the source and the capacitor means for controlling the switching of the quadrac.
Claim 13
Dependent Claim
130 words
A light responsive control system comprising a source of electrical energy, an electrically controlled device, terminal connecting means interconnecting the source and the device for supply of energizing current to the device, a pair of light actuated switch modules for respectively closing and opening an energizing circuit through said device, and circuit holding means for maintaining said energizing circuit closed upon actuation of one of the switch modules until reset by actuation of the other of the switch modules, said one of the switch modules including a quadrac connected in series with the controlleD device to said source, storage capacitor means connected to the quadrac for switching the same on and off, and photo-sensing means connected between the source and the capacitor means for controlling the switching of the quadrac.
Claim 14
Dependent Claim
81 words
The combination of claim 8 wherein said circuit holding means includes rectifier means connected to said source for establishing a dc power supply, illumination generating means connected to said power supply for actuating one of the switch modules when energized, light activated, latching switch means connected to the illumination generating means for energizing the same and reset means connecting the latching switch means to the other of the switch modules for unlatching the switch means to de-energize the illumination generating means.
Claim 15
Dependent Claim
64 words
The combination of claim 9 wherein the other of the switch modules includes a voltage controlled switch device connected to the reset means of the holding circuit means, photo-resistive means connected to the switch device for actuating the same, and voltage regulating means connected to the dc power supply in the holding circuit means for supply of a constant voltage to the photo-resistive means.
Claim 16
Dependent Claim
99 words
In a light control system, a source of electrical energy, an electrically controlled device, terminal connecting means interconnecting the source and the device for supply of energizing current to the device, a pair of light actuated switch modules for respectively closing and opening an energizing circuit through said device, one of said switch modules including a quadrac connected in series with the controlled device to said source storage capacitor means connected to the quadrac for switching the same on and off, and photo-sensing means connected between the source and the capacitor means for controlling the switching of the quadrac.
Claim 17
Dependent Claim
99 words
In a light control system, a source of electrical energy, an electrically controlled device, terminal connecting means interconnecting the source and the device for supply of energizing current to the device, a pair of light actuated switch modules for respectively closing and opening an energizing circuit through said device, one of said switch modules including a quadrac connected in series with the controlled device to said source storage capacitor means connected to the quadrac for switching the same on and off, and photo-sensing means connected between the source and the capacitor means for controlling the switching of the quadrac.
Claim 18
Dependent Claim
21 words
The combination of claim 11 wherein said terminal connecting means includes a pair of tube sockets respectively receiving the switch modules.
Claim 19
Dependent Claim
33 words
The combination of claim 11 including circuit holding means mounted by said one of the switch modules for illuminating the photo-sensing means until reset by actuation of the other of the switch modules.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |