Patent US4743820A successfully refreshed from Google Patents.
US4743820A
Expired / Lapsed
US
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Electronic appliance control
Assignee: France Scott Fetzer Co
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Filing: 1985-11-25
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Granted: 1988-05-10
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Expires: 2005-11-25
Abstract
Abstract An electric appliance control system is disclosed in which a logic controlled, solid-state, electronic system is used in conjunction with a mechanical switching device in the form of a cam disc operating a plurality of cam-operated switches. The control system combines the capabilities of performing complicated and numerous operational programs with the reliability of the cam-operated mechanical switching device.
Inventors
- 👤 Wayne Veach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:00
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/042; G05B19/0423; G05B2219/00; G05B2219/20; G05B2219/21; G05B2219/21004
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
182 words
A controller for an appliance having a plurality of selectively energizeable electromechanical components, comprising: input means for operator selection of a desired cycle of operation of said appliance; a motor; switching means coupled to be driven by said motor and having a plurality of timing cams on a rotating member for controlling the operation of a plurallity of switches for applying power to energize said components; and sequencing means for selectively advancing said switching means including: means for applying power to said motor; means on said rotating member for defining incremental positions around said rotating member; means for detecting movement of said rotating member from one of said positions to the next adjacent position; means separate from said rotating member and responsive to the selected operation cycle for defining a program for said rotating member which includes a series of operating steps each including a number of incremental positions to be moved and a time delay of operation; and means for operating said power applying means to move said rotating member a defined number of incremental positions in accordance with said program.
Claim 2
Dependent Claim
182 words
A controller for an appliance having a plurality of selectively energizeable electromechanical components, comprising: input means for operator selection of a desired cycle of operation of said appliance; a motor; switching means coupled to be driven by said motor and having a plurality of timing cams on a rotating member for controlling the operation of a plurallity of switches for applying power to energize said components; and sequencing means for selectively advancing said switching means including: means for applying power to said motor; means on said rotating member for defining incremental positions around said rotating member; means for detecting movement of said rotating member from one of said positions to the next adjacent position; means separate from said rotating member and responsive to the selected operation cycle for defining a program for said rotating member which includes a series of operating steps each including a number of incremental positions to be moved and a time delay of operation; and means for operating said power applying means to move said rotating member a defined number of incremental positions in accordance with said program.
Claim 3
Dependent Claim
31 words
The controller according to claim 1, wherein said sequencing means further includes means for timing a defined interval between successive actuations of said power applying means in accordance with said program.
Claim 4
Dependent Claim
91 words
The controller according to claim 1, wherein said defining means on said rotating member includes: a cam track on said rotating member including a plurality of spaced teeth; and said detecting means includes: a cam follower associated with said cam track; and switching means coupled to said cam follower for providing a first circuit condition when said cam follower is in contact with one of the tips of said teeth and providing a second circuit condition when said cam follower is in contact with one of the roots of said teeth.
Claim 5
Dependent Claim
14 words
The controller according to claim 1, wherein said sequencing means includes a programmed microcomputer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |