US4038627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-thermal isolating switch
Assignee: Individual
•
Filing: 1975-04-14
•
Granted: 1977-07-26
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Expires: 1995-04-14
Abstract
Abstract An electro-thermal isolating switch including an electrically driven, thermally isolated, heat generating semiconductor device; a thermally responsive element thermally connected with the semiconductor device; and contact means electrically isolated from the semiconductor device and electrically isolated from and driven by the thermally responsive element in accordance with heat generated by the semiconductor device.
Inventors
- 👤 Brant T. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:46
CPC Classifications
H; H01; H01H; H01H61/00; H01H61/01; H01H61/013
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
23 words
The switch of claim 1 including a low thermal conductivity support member for supporting and for reducing heat loss from said semiconductor device.
Claim 2
Dependent Claim
100 words
An electro-thermal isolating switch comprising: input terminal means for receiving a control signal; an electrically driven, thermally isolated heat generating semiconductor device connected to said input terminal means; a thermally responsive element thermally connected with and electrically isolated from said semiconductor device; contact means electrically isolated from said input terminal means and said semiconductor device and electrically isolated from and driven by said thermally responsive element; and output terminal means cooperating with said contact means to make and break therewith in accordance with heat generated in said semiconductor device in response to control signals received at said input terminal means.
Claim 3
Dependent Claim
100 words
An electro-thermal isolating switch comprising: input terminal means for receiving a control signal; an electrically driven, thermally isolated heat generating semiconductor device connected to said input terminal means; a thermally responsive element thermally connected with and electrically isolated from said semiconductor device; contact means electrically isolated from said input terminal means and said semiconductor device and electrically isolated from and driven by said thermally responsive element; and output terminal means cooperating with said contact means to make and break therewith in accordance with heat generated in said semiconductor device in response to control signals received at said input terminal means.
Claim 4
Dependent Claim
23 words
The switch of claim 2 including a low thermal conductivity support member for supporting and for reducing heat loss from said semiconductor device.
Claim 5
Dependent Claim
21 words
The switch of claim 2 including a thermal conducting member for thermally interconnecting said semiconductor device and said thermally responsive element.
References Cited (Backward Citations)
NL107444C
Cited
US3840834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |