US3702589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bimetallic temperature sensing device
Assignee: United States Atomic Energy Commission
•
Filing: 1968-02-08
•
Granted: 1972-11-14
•
Expires: 1988-02-08
Abstract
Abstract A device for sensing temperature excursions beyond predetermined limits above and below the ambient temperature of the device or some associated equipment including a first bimetallic disc having a first stable curved configuration below a high temperature limit above ambient temperature and a second reversed, stable curved configuration above the high temperature limit, a second bimetallic disc convex with respect to the first disc in a first stable configuration above a low temperature limit below ambient temperature and having a second reversed, stable curved configuration below the low temperature limit with portions of the discs in constant engagement, and means for sensing any movement of either of the discs from their first to their second stable configurations.
Inventors
- 👤 Virgil Erbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:21
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
A device for sensing temperature excursions above and below an ambient temperature, comprising a first bowed bimetallic member adapted to snap to a reverse bowed configuration at a first temperature above ambient temperature, a second bowed bimetallic member normally bowed away from said first bimetallic member and adapted to snap to a reverse bowed configuration at a second temperature below ambient temperature, means for maintaining marginal portions of said bimetallic members in an initial relationship of one with respect to the other and means for sensing snap movement of either of said bimetallic members.
Claim 2
Independent Claim
94 words
A device for sensing temperature excursions above and below an ambient temperature, comprising a first bowed bimetallic member adapted to snap to a reverse bowed configuration at a first temperature above ambient temperature, a second bowed bimetallic member normally bowed away from said first bimetallic member and adapted to snap to a reverse bowed configuration at a second temperature below ambient temperature, means for maintaining marginal portions of said bimetallic members in an initial relationship of one with respect to the other and means for sensing snap movement of either of said bimetallic members.
Claim 3
Dependent Claim
12 words
The device of claim 1 wherein said bimetallic members are dished discs.
Claim 4
Dependent Claim
20 words
The device of claim 1 having at least one bimetallic member nested with said first and said second bimetallic members.
Claim 5
Dependent Claim
35 words
The device of claim 1 wherein said sensing means includes a first means mounted internally of said first member and a second means mounted internally of said second member and aligned with said first means.
Claim 6
Dependent Claim
13 words
The device of claim 4 wherein said first and second means are electrodes.
Claim 7
Dependent Claim
22 words
The device of claim 4 wherein said first means is a firing pin and said second means is a percussion ignitable pyrotechnic.
Claim 8
Dependent Claim
17 words
The device of claim 1 wherein said sensing means is mounted externally of one of said members.
Claim 9
Dependent Claim
12 words
The device of claim 7 wherein said sensing means is a valve.
Claim 10
Dependent Claim
23 words
The device of claim 1 having an annular standoff between peripheries of said members to maintain the members at a predetermined initial spacing.
References Cited (Backward Citations)
US1656392A
Cited
US1856600A
Cited
US2203558A
Cited
US2487789A
Cited
US2565145A
Cited
US2742927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |