US3573564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relay time control circuit
Assignee: Siemens AG
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Filing: 1968-05-13
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Granted: 1971-04-06
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Expires: 1988-05-13
Abstract
Abstract A relay time control circuit that varies the inherent response and dropout times of the relay and maintains the actual response and dropout times to a defined range. An electronic switch is controlled by an RC time control circuit to initiate relay actuation when predetermined voltage conditions exist within the RC circuit. The electronic switch is decoupled from the time control circuit, and therefore temperature sensitivity of the electronic switch is not affected by the latter.
Inventors
- 👤 Hans Blauert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:18
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
236 words
A time control system having an RC circuit and a transistor having a base, emitter and collector for use with a relay having associated contacts comprising: A source of potential having first (+Ub) and second (-Ub) output terminals; a first voltage divider comprising the series connection of first (R3) resistance means, a first diode (D2) and second (R1) and third (R2) resistance means connected between the first (+Ub) and the second (-Ub) output terminals; capacitance means (C1) connected between the series connection of first diode (D2) and the second (R1) resistance means and a point of reference potential (MTB); an oppositely poled second diode (D3) connected between the common connection of the first (R3) resistance means and the first (D2) diode and the base of the transistor, the collector and emitter being connected to opposite terminals of the source of potential ( + OR - Ub); input means (S) to selectively connect one of the first (+Ub) and second (-Ub) output terminals to the series connection of the second (R1) and third (R2) resistance means to charge the capacitance means (C1) through the second resistance (R1) means, or to discharge the capacitance means through the series connection of the second (R1) and third (R2) resistance means to selectively bias the base of the transistor with respect to its emitter; and the relay being connected in the collector output circuit and being energized when the transistor conducts.
Claim 2
Dependent Claim
236 words
A time control system having an RC circuit and a transistor having a base, emitter and collector for use with a relay having associated contacts comprising: A source of potential having first (+Ub) and second (-Ub) output terminals; a first voltage divider comprising the series connection of first (R3) resistance means, a first diode (D2) and second (R1) and third (R2) resistance means connected between the first (+Ub) and the second (-Ub) output terminals; capacitance means (C1) connected between the series connection of first diode (D2) and the second (R1) resistance means and a point of reference potential (MTB); an oppositely poled second diode (D3) connected between the common connection of the first (R3) resistance means and the first (D2) diode and the base of the transistor, the collector and emitter being connected to opposite terminals of the source of potential ( + OR - Ub); input means (S) to selectively connect one of the first (+Ub) and second (-Ub) output terminals to the series connection of the second (R1) and third (R2) resistance means to charge the capacitance means (C1) through the second resistance (R1) means, or to discharge the capacitance means through the series connection of the second (R1) and third (R2) resistance means to selectively bias the base of the transistor with respect to its emitter; and the relay being connected in the collector output circuit and being energized when the transistor conducts.
Claim 3
Dependent Claim
124 words
The time control system recited in claim 1 further comprising a second voltage divider connected between the first (+Ub) and second (-Ub) output terminals, the emitter being connected to said second voltage divider, the first and second voltage dividers being relatively selected such that when the series connection point of the first diode (D2) and second resistance means (R1) of the first voltage divider reaches a predetermined potential (Ua), the second diode (D3) and the transistor (T1) are biased to conduction and the first diode (D2) is biased to nonconduction; the second diode (D3) and transistor (T1) being biased to nonconduction and the first diode (D2) being biased to conduction when the predetermined potential (Ua) is not reached at said series connection point (A).
Claim 4
Dependent Claim
124 words
The time control system recited in claim 1 further comprising a second voltage divider connected between the first (+Ub) and second (-Ub) output terminals, the emitter being connected to said second voltage divider, the first and second voltage dividers being relatively selected such that when the series connection point of the first diode (D2) and second resistance means (R1) of the first voltage divider reaches a predetermined potential (Ua), the second diode (D3) and the transistor (T1) are biased to conduction and the first diode (D2) is biased to nonconduction; the second diode (D3) and transistor (T1) being biased to nonconduction and the first diode (D2) being biased to conduction when the predetermined potential (Ua) is not reached at said series connection point (A).
Claim 5
Dependent Claim
91 words
The time control system recited in claim 1 wherein fourth (R1'') resistance means are connected between the second (R1) and third (R2) resistance means, the input means being selectively connectable to opposite ends of the fourth (R1'') resistance means through a movable relay contact (r), the relay contact (r) connecting the input means to the series connection of the second (R1) and fourth (R1'') resistance means when the relay is energized, and to the series connection of the third (R2) and fourth (R1'') resistance means when the relay is not energized.
Claim 6
Dependent Claim
43 words
The time control system recited in claim 1 further comprising means including additional transistors connected to the output of the first transistor to therewith comprise a plurality of amplifier stages, the relay being connected in the output circuit of the last amplifier stage.
Claim 7
Dependent Claim
43 words
The time control system recited in claim 3 further comprising means including additional transistors connected to the output of the first transistor to therewith comprise a plurality of amplifier stages, the relay being connected in the output circuit of the last amplifier stage.
Claim 8
Dependent Claim
20 words
The time control system recited in claim 1 wherein a plurality of relays are connected in the collector output circuit.
Claim 9
Dependent Claim
24 words
The time control system recited in claim 5 wherein a plurality of relays are connected in the output circuit of the last amplifier stage.
Claim 10
Dependent Claim
91 words
The time control system recited in claim 2 wherein fourth (R1'') resistance means are connected between the second (R1) and third (R2) resistance means, the input means being selectively connectable to opposite ends of the fourth (R1'') resistance means through a movable relay contact (r), the relay contact (r) connecting the input means to the series connection of the second (R1) and fourth (R1'') resistance means when the relay is energized, and to the series connection of the third (R2) and fourth (R1'') resistance means when the relay is not energized.
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |