US3673435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic relay
Assignee: Individual
•
Filing: 1970-03-17
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Granted: 1972-06-27
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Expires: 1990-03-17
Abstract
Abstract An electronic relay having two push-pull oscillators connected in series. Each oscillator has two transistors and a transformer having, in addition to its input and feedback windings, a control winding. Each oscillator is controlled by a latch circuit which can prevent oscillation by connecting a low resistor across the control winding. The latch circuits are interconnected so that only one oscillator can oscillate at any time.
Inventors
- 👤 Brian Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:38
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H04; H04L; H04L25/00; H04L25/02; H04L25/20; H04L25/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
86 words
An electronic relay comprising first and second power supply terminals, an oscillator connected across said power supply terminals and including a first transistor and a transformer having an input winding, a feedback winding, and a control winding, said transistor being connected to said input and feedback windings, a low value resistance, and switching means operative in response to an electrical control signal to connect the low value resistance across the control winding to inhibit said oscillator which acts as a switch between said power supply terminals.
Claim 2
Dependent Claim
86 words
An electronic relay comprising first and second power supply terminals, an oscillator connected across said power supply terminals and including a first transistor and a transformer having an input winding, a feedback winding, and a control winding, said transistor being connected to said input and feedback windings, a low value resistance, and switching means operative in response to an electrical control signal to connect the low value resistance across the control winding to inhibit said oscillator which acts as a switch between said power supply terminals.
Claim 3
Dependent Claim
76 words
An electronic relay as claimed in claim 1 wherein the oscillator is of the push-pull type and includes a second transistor, the collectors of which are connected to respective ends of said input winding, the bases of which are connected to respective ends of said feedback winding, and the emitters of which are connected to said second power supply terminal, and said input winding being tapped with its tapping connected to said first power supply terminal.
Claim 4
Dependent Claim
17 words
An electronic relay comprising first and second electronic relays as claimed in claim 1 connected in series.
Claim 5
Dependent Claim
48 words
An electronic relay as claimed in claim 3 which comprises first and second latch circuits which incorporate the switching means of the first and second electronic relays respectively, the first and second latch circuits being interconnected so that only one of the oscillators can oscillate at any time.
Claim 6
Dependent Claim
44 words
An electronic relay as claimed in claim 4 wherein the first and second latch circuits are connected so that if the input signal is entirely removed the oscillator which was oscillating at the instant of the removal of the input signal continues to oscillate.
Claim 7
Dependent Claim
30 words
An electronic relay as claimed in claim 4 wherein the first and second latch circuits are connected so that in the absence of an input signal a particular oscillator oscillates.
Claim 8
Dependent Claim
73 words
An electronic relay as claimed in claim 6 wherein each latch circuit comprises a bridge rectifier connected across the associated control winding, and first and second transistors, the emitter-collector paths of which are connected across the output of the bridge rectifier, the output of the bridge rectifier being applied to the base of the first transistor of the other latch circuit, the input signal being applied between the bases of the second transistors.
Claim 9
Dependent Claim
36 words
An electronic relay as claimed in claim 7 which includes connecting means settable to connect the output of the rectifier bridge of each latch circuit to the base of the second transistor of that latch circuit.
Claim 10
Dependent Claim
22 words
An electronic relay as claimed in clAim 4 wherein an input low-pass filter is provided at the input of each latch circuit.
Claim 11
Dependent Claim
27 words
An electronic relay as claimed in claim 4 wherein an output low-pass filter is provided at the output of each of the first and second electronic relays.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |