Patent US3827014A successfully refreshed from Google Patents.
US3827014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal protector
Assignee: Portage Electric Products Inc
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Filing: 1973-09-24
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Granted: 1974-07-30
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Expires: 1993-09-24
Abstract
Abstract A thermally actuable switch is provided with two conductive members having a first portion of each selectively contacting and a second portion of each separated by an insulating material, at least one of the conductors being spring biased to one position and being held in a second position by a temperature sensitive material which collapses when a predetermined temperature has been reached.
Inventors
- 👤 G Wehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:57
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/74; H01H37/76; H01H37/764
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
A thermally actuable electric switch comprising: a. a conductive outer casing having a first end and a second end; b. a spring metal member within said casing having a first end and a second end; c. insulating members electrically insulating said first end of said casing from said first end of said spring metal member such that said spring metal member occupies a second position within said case; and d. a thermally decomposable member within said casing, said thermally decomposable member being in direct contact with said spring metal member and urging said second end of said spring metal member to a first position relative to the second end of said casing.
Claim 2
Dependent Claim
112 words
A thermally actuable electric switch comprising: a. a conductive outer casing having a first end and a second end; b. a spring metal member within said casing having a first end and a second end; c. insulating members electrically insulating said first end of said casing from said first end of said spring metal member such that said spring metal member occupies a second position within said case; and d. a thermally decomposable member within said casing, said thermally decomposable member being in direct contact with said spring metal member and urging said second end of said spring metal member to a first position relative to the second end of said casing.
Claim 3
Dependent Claim
43 words
The thermal switch of claim 1 wherein said second position of said spring metal member is out of contact with said casing and said spring metal member is urged into contact with said casing as a first position by said thermally decomposable member.
Claim 4
Dependent Claim
43 words
The thermal switch of claim 1 wherein the second position of said spring metal member is in contact with said casing and said spring metal member is urged to a first position out of contact with said casing by said thermally decomposable member.
Claim 5
Dependent Claim
32 words
The thermal switch of claim 1 wherein the inner wall of said case is provided with an electrically conductive material at least at the point of contact of said spring metal member.
Claim 6
Dependent Claim
15 words
The thermal switch of claim 4 wherein said elecrically conductive material is a silver flashing.
Claim 7
Dependent Claim
15 words
The thermal switch of claim 4 wherein said electrically conductive material is a beryllium-copper strip.
Claim 8
Dependent Claim
27 words
The thermal switch of claim 1 wherein the first end of said spring metal member and said casing are mechanically and electrically connected in an electrical circuit.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |