Patent US3928834A successfully refreshed from Google Patents.
US3928834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time delay switch
Assignee: Individual
•
Filing: 1974-03-04
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Granted: 1975-12-23
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Expires: 1994-03-04
Abstract
Abstract A time delay switch which has three positions with one position immediately turning the switch on and a second position immediately turning the switch off and further providing for a third time delay position such that the circuit remains on for a predetermined time after the switch has been moved to the time delay position.
Inventors
- 👤 William E Soong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:51
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/30; H01H43/301; H01H43/302; H01H43/304
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
230 words
A three position electrical switch having ''''on'''', ''''off'''', and ''''time delay off'''' positions comprising, a switch housing, a pair of power supply leads, a snap action member with two stable positions mounted in said housing, a first contact carried on said snap action member, a second contact mounted in said housing and engageable with said first contact in one of said stable positions of said snap action member and electrically connected to one of said pair of power leads, a pivotally mounted V-shaped actuating member electrically connected to the other one of said pair of power leads and mechanically coupled to said snap action member and electrically connected to said first contact, a bimetallic member mounted so that in a first position it engages said switch actuator to move it to one of said stable positions to separate said first and second contacts, heating means mounted adjacent said bimetallic member, and a control member engageable with said actuating member to move it and said snap action member, and circuit means connected to said control member for connecting said heating means to said one of said pair of power leads when said control member does not engage said actuating member, said second side of said heating means connected to ground and said control member has a portion engageable with both legs of said V-shaped actuating member to move it either direction.
Claim 2
Dependent Claim
230 words
A three position electrical switch having ''''on'''', ''''off'''', and ''''time delay off'''' positions comprising, a switch housing, a pair of power supply leads, a snap action member with two stable positions mounted in said housing, a first contact carried on said snap action member, a second contact mounted in said housing and engageable with said first contact in one of said stable positions of said snap action member and electrically connected to one of said pair of power leads, a pivotally mounted V-shaped actuating member electrically connected to the other one of said pair of power leads and mechanically coupled to said snap action member and electrically connected to said first contact, a bimetallic member mounted so that in a first position it engages said switch actuator to move it to one of said stable positions to separate said first and second contacts, heating means mounted adjacent said bimetallic member, and a control member engageable with said actuating member to move it and said snap action member, and circuit means connected to said control member for connecting said heating means to said one of said pair of power leads when said control member does not engage said actuating member, said second side of said heating means connected to ground and said control member has a portion engageable with both legs of said V-shaped actuating member to move it either direction.
Claim 3
Dependent Claim
63 words
A three position switch according to claim 1 wherein said circuit means includes a pair of brushes respectively connected to said one of said pair of power leads and to said heating means and an electrical conductive area mounted on said control member and engageable with both of said pair of brushes when said control member is in the ''''time delay off'''' position.
Claim 4
Dependent Claim
27 words
A three position switch according to claim 2 wherein said control member is pivotally mounted to said housing and has a portion which extends from said housing.
Claim 5
Dependent Claim
26 words
A three position switch according to claim 3 wherein said control member has a cam portion engageable with both of said legs of said V-shaped member.
Claim 6
Dependent Claim
15 words
A three position switch according to claim 4 wherein electrical conductive area is crescent shaped.
Claim 7
Dependent Claim
35 words
A three position switch according to claim 2 wherein said control member is slidably movable in said housing and has a projecting portion which is engageable with both of said legs of said V-shaped member.
Claim 8
Dependent Claim
19 words
A three position switch according to claim 3 wherein said electrical conductive area extends longitudinally of said control member.
References Cited (Backward Citations)
US3559140A
Cited
US3569887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |