US3720876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Touch-button actuated electronic latching device with means for ensuring latch operation upon the application of power
Assignee: Lanteris Space LLC
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Filing: 1971-04-28
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Granted: 1973-03-13
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Expires: 1991-04-28
Abstract
Abstract An improvement in the circuits used in touch-button operated electronic latches for tuning voltage variable capacitor tuned UHF television tuners. When a bank of electronic latches operating from a common power source is first energized by the application of input power, all latches will remain in the off state. In the case of a television receiver no signal will be received and the picture and sound displays will contain only noise. The improvement here is the inclusion of circuits that ensure the operation of one latch when power is first applied. This means that when the receiver is first energized it will be tuned to an occupied channel.
Inventors
- 👤 A Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:48
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/023; H03J5/00; H03J5/02; H03J5/0218
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
In a latching system for touch-button actuated potentiometers used in the tuning of voltage variable reactance receiver tuners, the combination comprising: a. a source of regulated d-c potential; b. a source of low voltage unregulated d-c potential; c. a plurality of electronic latching circuits connected to said potential sources, each latching circuit having an off state and an on state and comprising: a momentary contact touch-button switch connected to initiate the on state of said latching circuit, electronic switching means connected to said potential sources and actuated by said touch-button switch, an indicator connected to said switching means and energized through said switching means by said source of unregulated d-c potential, and a potentiometer connected to said switching means and energized through said switching means by said source of regulated d-c potential; and d. means for actuating one of said latching circuits to said on state responsive to the energizing of at least one of said potential sources.
Claim 2
Dependent Claim
158 words
In a latching system for touch-button actuated potentiometers used in the tuning of voltage variable reactance receiver tuners, the combination comprising: a. a source of regulated d-c potential; b. a source of low voltage unregulated d-c potential; c. a plurality of electronic latching circuits connected to said potential sources, each latching circuit having an off state and an on state and comprising: a momentary contact touch-button switch connected to initiate the on state of said latching circuit, electronic switching means connected to said potential sources and actuated by said touch-button switch, an indicator connected to said switching means and energized through said switching means by said source of unregulated d-c potential, and a potentiometer connected to said switching means and energized through said switching means by said source of regulated d-c potential; and d. means for actuating one of said latching circuits to said on state responsive to the energizing of at least one of said potential sources.
Claim 3
Dependent Claim
158 words
In a latching system for touch-button actuated potentiometers used in the tuning of voltage variable reactance receiver tuners, the combination comprising: a. a source of regulated d-c potential; b. a source of low voltage unregulated d-c potential; c. a plurality of electronic latching circuits connected to said potential sources, each latching circuit having an off state and an on state and comprising: a momentary contact touchbutton switch connected to initiate the on state of said latching circuit, electronic switching means connected to said potential sources and actuated by said touch-button switch, an indicator connected to said switching means and energized through said switching means by said source of unregulated d-c potential, and a potentiometer connected to said switching means and energized through said switching means by said source of regulated d-c potential; and d. means for actuating one of said latching circuits to said on state responsive to the energizing of at least one of said potential sources.
Claim 4
Dependent Claim
158 words
In a latching system for touch-button actuated potentiometers used in the tuning of voltage variable reactance receiver tuners, the combination comprising: a. a source of regulated d-c potential; b. a source of low voltage unregulated d-c potential; c. a plurality of electronic latching circuits connected to said potential sources, each latching circuit having an off state and an on state and comprising: a momentary contact touchbutton switch connected to initiate the on state of said latching circuit, electronic switching means connected to said potential sources and actuated by said touch-button switch, an indicator connected to said switching means and energized through said switching means by said source of unregulated d-c potential, and a potentiometer connected to said switching means and energized through said switching means by said source of regulated d-c potential; and d. means for actuating one of said latching circuits to said on state responsive to the energizing of at least one of said potential sources.
Claim 5
Dependent Claim
73 words
The latching system of claim 1 wherein said actuating means includes a first means associated with a first predetermined one of said latching circuits responsive only to the energization of said source of low voltage unregulated d-c potential and a second means associated with a second predetermined one of said latching circuits responsive to the energization of both said source of low voltage unregulated d-c potential and said source of regulated d-c potential.
Claim 6
Dependent Claim
69 words
The latching system of claim 2 wherein said first means comprises a capacitor connected across said momentary contact touch-button switch associated with said first one of said latching circuits to turn on said switching means in response to energizing said unregulated source of d-c potential and a capacitor connected to said indicator to enhance the action thereof in response to the energization of said unregulated source of d-c potential.
Claim 7
Dependent Claim
40 words
The latching system of claim 2 wherein said second means comprises a capacitor connected to said second one of said latching circuits to turn on said switching means in response to the energization of said regulated source of d-c potential.
Claim 8
Dependent Claim
182 words
In a latching system for touch-button actuated potentiometers used in the tuning of voltage variable reactance receiver tuners, the combination comprising: a. a first source of d-c potential, said source having a relatively fast turn-on time and being regulated to provide a substantially fixed output; b. a second source of d-c potential having a relatively slow turn-on time; c. a plurality of electronic latching circuits connected to said sources, each latching circuit comprising: a complementary pair of transistors connected together to provide stable on and off latch states, an indicator connected to said transistors and energized from said second source of d-c potential to indicate the state of its associated pair of transistors, said indicator being energizable from said second source of d-c potential, and a potentiometer connected to said transistors and energized from said first source of d-c potential to provide a potentiometer variable output when said on latch state exists; and d. means for actuating a predetermined one only of said latching circuits in response to the difference in turn-on times of said sources when said sources are simultaneously energized.
Claim 9
Dependent Claim
182 words
In a latching system for touch-button actuated potentiometers used in the tuning of voltage variable reactance receiver tuners, the combination comprising: a. a first source of d-c potential, said source having a relatively fast turn-on time and being regulated to provide a substantially fixed output; b. a second source of d-c potential having a relatively slow turn-on time; c. a plurality of electronic latching circuits connected to said sources, each latching circuit comprising: a complementary pair of transistors connected together to provide stable on and off latch states, an indicator connected to said transistors and energized from said second source of d-c potential to indicate the state of its associated pair of transistors, said indicator being energizable from said second source of d-c potential, and a potentiometer connected to said transistors and energized from said first source of d-c potential to provide a potentiometer variable output when said on latch state exists; and d. means for actuating a predetermined one only of said latching circuits in response to the difference in turn-on times of said sources when said sources are simultaneously energized.
References Cited (Backward Citations)
US3560858A
Cited
US3503018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |