US3746942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static circuit arrangement
Assignee: Siemens Mobility Ltd
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Filing: 1971-10-27
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Granted: 1973-07-17
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Expires: 1991-10-27
Abstract
Abstract This disclosure relates to a static relay having an electronic coil circuit and an electronic contact circuit. The electronic coil circuit includes a pair of d.c. supply terminals and a pair of control terminals. The condition of the electronic contact circuit is controlled in accordance with the electrical state of the control terminals of the electronic coil circuit.
Inventors
- 👤 C Brown
- 👤 T George
- 👤 D Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:12
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/78; H03K17/795; H03K17/7955
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
97 words
A fail-safe solid state relay circuit having a. an energizable electronic coil equivalent circuit which has a controlled signal input, said energizable electronic coil equivalent circuit having a conditioned output that is in one of two conditions controlled by said controlled signal input, b. an electronic equivalent contact circuit controlled by said energizable electronic coil equivalent circuit output and having a signal input and output, said equivalent contact circuit allowing a signal directly proportional to said input signal to appear on said output only when said conditioned output is in a selected one of said two conditions.
Claim 2
Dependent Claim
97 words
A fail-safe solid state relay circuit having a. an energizable electronic coil equivalent circuit which has a controlled signal input, said energizable electronic coil equivalent circuit having a conditioned output that is in one of two conditions controlled by said controlled signal input, b. an electronic equivalent contact circuit controlled by said energizable electronic coil equivalent circuit output and having a signal input and output, said equivalent contact circuit allowing a signal directly proportional to said input signal to appear on said output only when said conditioned output is in a selected one of said two conditions.
Claim 3
Dependent Claim
87 words
A fail-safe circuit arrangement comprising, first circuit means for producing pulsating signals, second circuit means having its input circuit coupled to said first circuit means and responsive to pulsating signals for opening and closing its output circuit, an electronic relay means connected to said output circuit of said second circuit means and having its coil circuit controlling the condition of its contact circuit, and a third circuit means connected to said contact circuit of said electronic relay means for controlling the conductive condition of an output device.
Claim 4
Dependent Claim
87 words
A fail-safe circuit arrangement comprising, first circuit means for producing pulsating signals, second circuit means having its input circuit coupled to said first circuit means and responsive to pulsating signals for opening and closing its output circuit, an electronic relay means connected to said output circuit of said second circuit means and having its coil circuit controlling the condition of its contact circuit, and a third circuit means connected to said contact circuit of said electronic relay means for controlling the conductive condition of an output device.
Claim 5
Dependent Claim
35 words
A fail-safe circuit arrangement as defined in claim 2, wherein each of said first circuit means, said second circuit means and said electronic relay means includes a light emitting device and a light responsive device.
Claim 6
Dependent Claim
18 words
A fail-safe circuit arrangement as defined in claim 2, wherein said first circuit means is a free-running oscillator.
Claim 7
Dependent Claim
18 words
A fail-safe circuit arrangement as defined in claim 2, wherein said third circuit means is an amplifier-rectifier network.
Claim 8
Dependent Claim
24 words
A fail-safe circuit arrangement as defined in claim 2, wherein said electronic relay means includes a semiconductive coil circuit and a photosensitive contact circuit.
Claim 9
Dependent Claim
24 words
A fail-safe circuit arrangement as defined in claim 6, wherein said photosensitive contact circuit includes a light emitting device and a light responsive device.
Claim 10
Dependent Claim
87 words
A fail-safe interlocking circuit comprising, a plurality of electronic contact devices each having an input and an output circuit, said output circuit of one of said plurality of said electronic contact devices cooperatively associated with said input circuit of a succeeding one of said plurality of said electronic contact devices so that the condition on said input circuit of said one of said plurality of said electronic contact devices is transposed to said output circuit of said succeeding one of said plurality of said electronic contact devices.
Claim 11
Dependent Claim
87 words
A fail-safe interlocking circuit comprising, a plurality of electronic contact devices each having an input and an output circuit, said output circuit of one of said plurality of said electronic contact devices cooperatively associated with said input circuit of a succeeding one of said plurality of said electronic contact devices so that the condition on said input circuit of said one of said plurality of said electronic contact devices is transposed to said output circuit of said succeeding one of said plurality of said electronic contact devices.
Claim 12
Dependent Claim
21 words
The interlocking circuit as defined in claim 8, wherein said plurality of said electronic contact devices include front and back contacts.
Claim 13
Dependent Claim
36 words
The interlocking circuit as defined in claim 8, wherein the input circuit of said electronic contact devices includes a light emitting device and said output circuit of said electronic contact devices includes a light responsive device.
Claim 14
Dependent Claim
37 words
The interlocking circuit as defined in claim 10, wherein said light emitting device is a diode which may be forwardly biased to form a front contact and which may be reversely biased to form a back contact.
Claim 15
Dependent Claim
16 words
The interlocking circuit as defined in claim 10, wherein said light responsive device is a transistor.
Claim 16
Dependent Claim
91 words
A fail-safe circuit arrangement comprising, a d.c. supply source, a connecting switch coupled to said d.c. supply source, a light emitting device coupled to said connecting switch and forwardly biased by the closing of said connecting switch, a transfer switch coupled to said light emitting device for controlling the illuminating condition of said light emitting device, and a light responsive device cooperatively associated with said light emitting device so that the conductive condition of said light responsive device is controlled in accordance With the illuminating condition of said light emitting device.
Claim 17
Dependent Claim
91 words
A fail-safe circuit arrangement comprising, a d.c. supply source, a connecting switch coupled to said d.c. supply source, a light emitting device coupled to said connecting switch and forwardly biased by the closing of said connecting switch, a transfer switch coupled to said light emitting device for controlling the illuminating condition of said light emitting device, and a light responsive device cooperatively associated with said light emitting device so that the conductive condition of said light responsive device is controlled in accordance With the illuminating condition of said light emitting device.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |