US4514718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal cutoff construction, member therefor and methods of making the same
Assignee: Emerson Electric Co
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Filing: 1983-12-02
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Granted: 1985-04-30
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Expires: 2003-12-02
Abstract
Abstract A thermal cutoff construction, member therefor and methods of making the same are provided, the thermal cutoff construction having an electrical switching unit that changes its operating condition when the member therein melts by being heated to a certain temperature for the particular material that forms the member being utilized. The material of the member comprises 4-methylumbelliferone.
Inventors
- 👤 Linda B. Birx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:32
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/74; H01H37/76; H01H37/764; H01H37/765; H01H2037/768
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
50 words
In a member for a thermal cutoff construction having an electrical switching unit that changes its operating condition when said member therein melts by being heated to a certain temperature for the particular material that forms the member being utilized, the improvement wherein said material of said member comprises 4-methylumbelliferone.
Claim 2
Dependent Claim
50 words
In a member for a thermal cutoff construction having an electrical switching unit that changes its operating condition when said member therein melts by being heated to a certain temperature for the particular material that forms the member being utilized, the improvement wherein said material of said member comprises 4-methylumbelliferone.
Claim 3
Dependent Claim
25 words
A member for a thermal cutoff construction as set forth in claim 1 wherein said 4-methylumbelliferone comprises approximately 100% of said material of said member.
Claim 4
Dependent Claim
39 words
A member for a thermal cutoff construction as set forth in claim 1 wherein said material of said member has additional means therein with said 4-methylumbelliferone providing at least 25% of the volume of said material of said member.
Claim 5
Dependent Claim
26 words
A member for a thermal cutoff construction as set forth in claim 3 wherein said additional means of said material of said member comprises a binder.
Claim 6
Dependent Claim
19 words
A member for a thermal cutoff construction as set forth in claim 4 wherein said binder comprises an epoxy.
Claim 7
Dependent Claim
26 words
A member for a thermal cutoff construction as set forth in claim 3 wherein said additional means of said material of said member comprises a lubricant.
Claim 8
Dependent Claim
19 words
A member for a thermal cutoff construction as set forth in claim 6 wherein said lubricant comprises calcium stearate.
Claim 9
Dependent Claim
26 words
A member for a thermal cutoff construction as set forth in claim 3 wherein said additional means of said material of said member comprises a pigment.
Claim 10
Dependent Claim
20 words
A member for a thermal cutoff construction as set forth in claim 8 wherein said pigment comprises a metal oxide.
Claim 11
Dependent Claim
47 words
In a thermal cutoff construction having an electrical switching unit that changes its operating condition when a member therein melts by being heated to a certain temperature for the particular material that forms the member being utilized, the improvement wherein said material of said member comprises 4-methylumbelliferone.
Claim 12
Dependent Claim
47 words
In a thermal cutoff construction having an electrical switching unit that changes its operating condition when a member therein melts by being heated to a certain temperature for the particular material that forms the member being utilized, the improvement wherein said material of said member comprises 4-methylumbelliferone.
References Cited (Backward Citations)
US4075595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |