US3811054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manually operated switch
Assignee: Individual
•
Filing: 1973-05-15
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Granted: 1974-05-14
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Expires: 1993-05-15
Abstract
Abstract The invention relates to a manually operated switch, suited for connection between a lamp load and a supply circuit in a lighting installation for alternating current and comprising a semiconducting rectifier with a gate electrode.
Inventors
- 👤 G Wern
- 👤 L Wern
- 👤 C Wern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:33
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/04; H05B39/08; H05B39/083; H05B39/085; H02; H02G; H02G3/00; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/25; H02M5/257; H02M5/2573; H02M5/2576; H03; H03K; H03K17/00; H03K17/94; H03K17/96; H03K17/962
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
200 words
Manually operated switch, suited for connection between a lamp load and a supply circuit in a lighting installation for alternating current and comprising a semiconducting rectifier with a gate electrode, a counting circuit with a forward stepping input and a digital control output connected to said gate electrode of said semiconducting rectifier for controlling the conduction of the latter in dependence on the condition of activation of said digital control output as determined by that position to which the counting circuit is stepped, and a control pulse shaping circuit having a first and a second input terminal for connection to a first terminal via a manually controllable external capacitative reactance and to a second terminal respectively of said supply circuit and having an output pair of terminals connected to said forward stepping input of said counting circuit, said control pulse shaping circuit including a cascade connection of a clipper stage and a pulse counting stage for generating a control pulse for forward stepping of said counting circuit in dependence on that a temporary reduction of said external capacitative reactance has brought a predetermined number of pulses under subsequent periods of said altenating current to be supplied from said clipper stage.
Claim 2
Dependent Claim
200 words
Manually operated switch, suited for connection between a lamp load and a supply circuit in a lighting installation for alternating current and comprising a semiconducting rectifier with a gate electrode, a counting circuit with a forward stepping input and a digital control output connected to said gate electrode of said semiconducting rectifier for controlling the conduction of the latter in dependence on the condition of activation of said digital control output as determined by that position to which the counting circuit is stepped, and a control pulse shaping circuit having a first and a second input terminal for connection to a first terminal via a manually controllable external capacitative reactance and to a second terminal respectively of said supply circuit and having an output pair of terminals connected to said forward stepping input of said counting circuit, said control pulse shaping circuit including a cascade connection of a clipper stage and a pulse counting stage for generating a control pulse for forward stepping of said counting circuit in dependence on that a temporary reduction of said external capacitative reactance has brought a predetermined number of pulses under subsequent periods of said altenating current to be supplied from said clipper stage.
Claim 3
Dependent Claim
58 words
Manually operated switch according to claim 1 wherein said clipper stage in said control pulse shaping circuit comprises a peak value detector and an adding circuit with a first pair of input terminals connected to said input terminals of said control pulse shaping circuit and with a second pair of input terminals connected to said peak value detector.
Claim 4
Dependent Claim
72 words
Manually operated switch according to claim 1 wherein a trigger pulse generating circuit has a digital control input connected to said digital control output of said counting circuit and an output connected to said gate electrode of said semiconducting rectifier for supplying trigger pulses to it at a phase angle within the period of said alternating current determined by the condition of activation of said digital control output of said counting circuit.
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |