Patent US3809930A successfully refreshed from Google Patents.
US3809930A
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Static relaying circuit
Assignee: Siemens Mobility Ltd
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Filing: 1971-09-23
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Granted: 1974-05-07
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Expires: 1991-09-23
Abstract
Abstract A system of fail-safe static logic is proposed which uses circuit elements closely analogous to conventional electromechanical relays. The d.c. feeds found in conventional relay circuitry are replaced by pulsating feeds originating from a multivibrator. The coil of a conventional relay becomes a simple electronic circuit, which normally gives a positive d.c. output (corresponding to the release condition of the relay), changing in polarity to a negative d.c. output (equivalent to pick-up of the relay) when a pulsating feed is applied to the input. Each conventional relay contact is replaced by an insulated signal coupler which is capable of passing on a pulsating feed signal provided it is also enabled by a d.c. voltage of correct polarity obtained from the output terminals of the ''coil'' circuit, the sense of the connexions determining whether the contact acts as a ''front'' or a ''back.
Inventors
- 👤 C Brown
- 👤 T George
- 👤 D Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/78; H03K17/795; H03K17/7955
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
91 words
A fail-safe static relaying circuit comprising, supply terminals connected to an electrical supply source, control terminals connected to a modulating device having a predetermined fRequency, an insulated signal coupler connected between a pair of input and output terminals, circuit means energized by said supply source applied to said supply terminals and responsive to the predetermined frequency of said modulating device to produce a given polarity of an intermediate signal to which said insulated signal coupler is responsive so that the coupling condition between said input and said output terminals is controlled.
Claim 2
Dependent Claim
91 words
A fail-safe static relaying circuit comprising, supply terminals connected to an electrical supply source, control terminals connected to a modulating device having a predetermined fRequency, an insulated signal coupler connected between a pair of input and output terminals, circuit means energized by said supply source applied to said supply terminals and responsive to the predetermined frequency of said modulating device to produce a given polarity of an intermediate signal to which said insulated signal coupler is responsive so that the coupling condition between said input and said output terminals is controlled.
Claim 3
Dependent Claim
35 words
The fail-safe static relaying circuit as defined in claim 1, wherein said insulated signal coupler includes a pair of electrically isolated components which are capable of transmitting a signal between said input and output terminals.
Claim 4
Dependent Claim
43 words
The fail-safe static relaying circuit as defined in claim 1, wherein said insulated signal coupler includes an illumination emitting and an illumination semiconductor device which is subject to illumination only when the given polarity of said intermediate signal is applied to said diode.
Claim 5
Dependent Claim
18 words
The fail-safe static relaying circuit as defined in claim 2, wherein said transmitted signal is a modulated signal.
Claim 6
Dependent Claim
32 words
The fail-safe static relaying circuit as defined in claim 1, wherein the given polarity of said intermediate signal is such that said insulated signal coupler couples said input and said output terminals.
Claim 7
Dependent Claim
32 words
The fail-safe static relaying circuit as defined in claim 1, wherein the given polarity of said intermediate signal is such that said insulated signal coupler decouples said inut and said output terminals.
Claim 8
Dependent Claim
32 words
The fail-safe static relaying circuit as defined in claim 1, wherein a plurality of insulated signal couplers are controlled by the given polarity of the intermediate signal produced by said circuit means.
Claim 9
Dependent Claim
29 words
The fail-safe static relaying circuit as defined in claim 7, wherein each of said plurality of insulated signal couplers is connected between a pair of input and output terminals.
Claim 10
Dependent Claim
84 words
A fail-safe static relaying circuit comprising a first pair of terminals connected to a d.c. supply source, a second pair of terminals connected to a modulating device, an insulated signal coupler interconnected between input and output means, circuit means energized by the application of said d.c. supply source to said first pair of terminals and responsive to the presence and absence of said modulating device to produce an intermediate signal to establish a first and a second coupling state of said insulated signal coupler.
Claim 11
Dependent Claim
84 words
A fail-safe static relaying circuit comprising a first pair of terminals connected to a d.c. supply source, a second pair of terminals connected to a modulating device, an insulated signal coupler interconnected between input and output means, circuit means energized by the application of said d.c. supply source to said first pair of terminals and responsive to the presence and absence of said modulating device to produce an intermediate signal to establish a first and a second coupling state of said insulated signal coupler.
Claim 12
Dependent Claim
51 words
A fail-safe static relaying circuit as defined in claim 9, wherein a first given magnitude and polarity of said intermediate signal establishes said first coupling state of said insulated signal coupler and a second given magnitude and polarity of said intermediate signal establishes said second coupling state of said electrical coupler.
Claim 13
Dependent Claim
34 words
A fail-safe static relaying circuit as defined in claim 10, said first given magnitude and polarity of said intermediate signal results in said insulated signal coupler coupling said input means to said output means.
Claim 14
Dependent Claim
35 words
A fail-safe static relaying circuit as defined in claim 10, wherein said second given magnitude and polarity of said intermediate signal results in said insulated signal coupler decoupling said input means from said output means.
Claim 15
Dependent Claim
20 words
A fail-safe static relaying circuit as defined in claim 9, wherein said insulated signal coupler is an illumination coupled device.
Claim 16
Dependent Claim
28 words
A fail-safe static relaying circuit as defined in claim 13, wherein said illumination coupled device includes an illumination emitting unilaterally conductive element and an illumination responsive semiconductor element.
Claim 17
Dependent Claim
28 words
A fail-safe static relaying circuit as defined in claim 9, wherein said modulating device is controlled by a switch which is connected to said second pair of terminals.
Claim 18
Dependent Claim
21 words
A fail-safe static relaying circuit as defined by claim 9, wherein said circuit means producing said intermediate signal includes a transformer.
Claim 19
Dependent Claim
31 words
A fail-safe static relaying circuit as defined in claim 16, wherEin the secondary winding of said transformer is connected to a first pair of terminals of four-terminal capacitor by a diode.
Claim 20
Dependent Claim
26 words
A fail-safe static relaying circuit as defined in claim 17, wherein the second pair of terminals of said four-terminal capacitor are connected to a zener diode.
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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |