US3824480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequential switching device
Assignee: US Philips Corp
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Filing: 1972-11-29
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Granted: 1974-07-16
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Expires: 1992-11-29
Abstract
Abstract A switching device is disclosed in which switch control means (a multi-stage shift register) controls the switching of switching elements which, in turn, control a predetermined sequence of operations of a controlled device (for example, a washing machine) in a predetermined sequence of times. Stepping pulse generating means steps the switch control means stage by stage. The timing of the stepping pulses is controlled by a periodic pulse generating means via a gated control means in turn controlled by a counter and the outputs of the switch control means.
Inventors
- 👤 K Eshraghian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:37
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/07; D; D06; D06F; D06F34/00; D06F34/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
A switching device for controlling a plurality of operations in a predetermined sequence of operations and at predetermined times, said switching device comprising: A. a plurality of switching elements for controlling selected operations; B. switch control means having a plurality of stages, each stage having an activatable control output connected to predetermined ones of said switching elements for controlling said switching elements; C. stepping pulse generating means for stepping said switch control means from one stage to another; D. periodic pulse generating means responsive to an activated control output of said switch control means for generating a sequence of pulses each separated by a predetermined period; and E. gated control means coupled to preselected ones of the control outputs of said switch control means and to said periodic pulse generating means and responsive to predetermined periodic pulses for stepping said switch control means from stage to stage and thereby activating said switching elemEnts to control operations of said predetermined sequence of operations in accordance with the timing of the periodic pulses.
Claim 2
Dependent Claim
171 words
A switching device for controlling a plurality of operations in a predetermined sequence of operations and at predetermined times, said switching device comprising: A. a plurality of switching elements for controlling selected operations; B. switch control means having a plurality of stages, each stage having an activatable control output connected to predetermined ones of said switching elements for controlling said switching elements; C. stepping pulse generating means for stepping said switch control means from one stage to another; D. periodic pulse generating means responsive to an activated control output of said switch control means for generating a sequence of pulses each separated by a predetermined period; and E. gated control means coupled to preselected ones of the control outputs of said switch control means and to said periodic pulse generating means and responsive to predetermined periodic pulses for stepping said switch control means from stage to stage and thereby activating said switching elemEnts to control operations of said predetermined sequence of operations in accordance with the timing of the periodic pulses.
Claim 3
Dependent Claim
55 words
A switching device according to claim 1 wherein said gated control means comprises a multi-stage counter responsive to the periodic pulses to activate predetermined counter stages, and gating means responsive to an activated control output of said switch control means and an activated counter stage for stepping said switch control means to the next stage.
Claim 4
Dependent Claim
43 words
A switching device according to claim 2 wherein said gating means comprises a plurality of ''''and'''' gates each responsive to a preselected activated counter stage and an activated control output to cause said stepping pulse generating means to step said switch control means.
Claim 5
Dependent Claim
36 words
A switching device according to claim 3 wherein said gating means comprises an ''''and'''' gate responsive to a selected stage of said multi-stage counter to step said switch control means when said selected stage is activated.
Claim 6
Dependent Claim
35 words
A switching device according to claim 4 wherein said gating means further includes a selection switch to connect an input of said ''''and'''' gate with a selected one of the outputs of said multi-stage counter.
Claim 7
Dependent Claim
27 words
A switching device according to claim 5 wherein said periodic pulse generating means has two modes of operation for generating pulses spaced by two different preselected periods.
Claim 8
Dependent Claim
20 words
A switching device according to claim 6 wherein said plurality of switching elements controls the operations of a washing machine.
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |