Patent US1234774A successfully refreshed from Google Patents.
Patent US3638734A successfully refreshed from Google Patents.
US3638734A
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Reinforced fusible element
Assignee: Scott Technologies Inc
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Filing: 1970-09-23
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Granted: 1972-02-01
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Expires: 1990-09-23
Abstract
Abstract A reinforced fusible element useful in fire extinguishing sprinklers, fusible links on fire doors and the like is disclosed wherein the fusible material usually solder of a lead alloy or the like is provided with a thin frangible covering for stabilizing its size and shape by acting to prevent cold flow of the alloy as a result of compressive or tension forces thereagainst. Specifically a fusible element may be provided with a thin plated metal coating restricting growth due to cold flow in any direction.
Inventors
- 👤 Wayne E Ault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:08
CPC Classifications
A; A62; A62C; A62C37/00; A62C37/08; A62C37/10; A62C37/11; A62C37/12; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12333; Y10T428/12424; Y10T428/12444; Y10T428/12493; Y10T428/12681; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
53 words
A fusible element comprising a shaped section of a fusible alloy having a thin covering means, said means consisting of a covering material of a thickness to restrain creep and cold flow of said alloy at temperatures less than the fusing temperature of said alloy and being collapsible upon fusing of said alloy.
Claim 2
Dependent Claim
53 words
A fusible element comprising a shaped section of a fusible alloy having a thin covering means, said means consisting of a covering material of a thickness to restrain creep and cold flow of said alloy at temperatures less than the fusing temperature of said alloy and being collapsible upon fusing of said alloy.
Claim 3
Dependent Claim
27 words
The fusible element set forth in claim 1 and wherein the covering means restraining cold flow of the alloy comprises a coating of nonstretchable material positioned thereabout.
Claim 4
Dependent Claim
28 words
The fusible element set forth in claim 1 and wherein the covering means restraining cold flow of the alloy of the fusible element comprises an electroplated metallic coating.
Claim 5
Dependent Claim
41 words
The fusible element set forth in claim 1 and wherein the means restraining the cold flow of the alloy of the fusible element comprises a nonstretchable woven jacket enclosing said fusible element, and capable of collapse upon fusing of said element.
Claim 6
Dependent Claim
23 words
The fusible element set forth in claim 1 and wherein a plurality of fibers are distributed throughout said fusible alloy and bonded thereto.
Claim 7
Dependent Claim
28 words
The fusible element set forth in claim 1 and wherein the covering means restraining cold flow of the alloy of the fusible element comprises a synthetic resin coating.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |