US3603807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timeclock dimming control
Assignee: Individual
•
Filing: 1969-07-11
•
Granted: 1971-09-07
•
Expires: 1989-07-11
Abstract
Abstract A control system for electrical circuits having ''''off'''' periods, ''''full on'''' periods, and periods of limited current flow. A timer-controlled switch mechanism incorporates a dimmer unit into a load circuit exclusively during periods of limited current flow, keeping the dimmer isolated completely during other phases of the control cycle.
Inventors
- 👤 Clifford D Erdmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:32
CPC Classifications
G; G04; G04C; G04C23/00; G04C23/02; G04C23/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
65 words
A control system for electrical equipment, said system comprising: a timing device including clock means and actuating means responsive to said clock means, and also including first and second switch means operable by said actuating means reverse relationship with respect to each other, said first switch means having open and closed positions to open and close a first electrical load circuit, said second switch means
Claim 2
Dependent Claim
65 words
A control system for electrical equipment, said system comprising: a timing device including clock means and actuating means responsive to said clock means, and also including first and second switch means operable by said actuating means reverse relationship with respect to each other, said first switch means having open and closed positions to open and close a first electrical load circuit, said second switch means
Claim 3
Dependent Claim
29 words
A system as defined in claim 1, wherein said actuating means includes a rocking actuator operating said switches oppositely to inherently prevent simultaneous closure of both of said switches.
References Cited (Backward Citations)
US3350581A
Cited
US3361942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |