US3715700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic heat detector
Assignee: Scott Technologies Inc
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Filing: 1971-06-17
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Granted: 1973-02-06
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Expires: 1991-06-17
Abstract
Abstract An automatic heat detector is provided which has one or more electric circuits with spring metal contacts and a diaphragm is a closed controlled vented chamber, the contacts being controlled by the expansion of the diaphragm in accordance with rapid temperature rise or by the release of a spring at a predetermined temperature, which spring engages the diaphragm and causes the contacts to move and control the circuits.
Inventors
- 👤 F Gloeckler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:07
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/74; H01H37/76; H01H37/767; G; G08; G08B; G08B17/00; G08B17/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
An automatic heat detector that comprises a mounting plate, a detector body secured to said mounting plate, a cover member employed with said body and forming a closed chamber therewith, said cover member having a central flange with a central opening therein, a diaphragm carried by said body inside said chamber, circuit control means in said body and controlled by the position of said diaphragm, a sleeve detachably held in said central opening by an eutectic alloy and having connected thereto a heat transmitting disc portion exteriorly disposed with respect to said cover member, a cup shaped member detachably mounted in said sleeve and connected thereto by said eutectic alloy, said cup shaped member having an abutment portion normally disposed contiguous to said cover member, and resilient means in engagement with said abutment portion urging said cup shaped member toward said diaphragm for operating engagement with said diaphragm upon melting of the eutectic alloy.
Claim 2
Dependent Claim
154 words
An automatic heat detector that comprises a mounting plate, a detector body secured to said mounting plate, a cover member employed with said body and forming a closed chamber therewith, said cover member having a central flange with a central opening therein, a diaphragm carried by said body inside said chamber, circuit control means in said body and controlled by the position of said diaphragm, a sleeve detachably held in said central opening by an eutectic alloy and having connected thereto a heat transmitting disc portion exteriorly disposed with respect to said cover member, a cup shaped member detachably mounted in said sleeve and connected thereto by said eutectic alloy, said cup shaped member having an abutment portion normally disposed contiguous to said cover member, and resilient means in engagement with said abutment portion urging said cup shaped member toward said diaphragm for operating engagement with said diaphragm upon melting of the eutectic alloy.
Claim 3
Dependent Claim
154 words
An automatic heat detector that comprises a mounting plate, a detector body secured to said mounting plate, a cover member employed with said body and forming a closed chamber therewith, said cover member having a central flange with a central opening therein, a diaphragm carried by said body inside said chamber, circuit control means in said body and controlled by the position of said diaphragm, a sleeve detachably held in said central opening by an eutectic alloy and having connected thereto a heat transmitting disc portion exteriorly disposed with respect to said cover member, a cup shaped member detachably mounted in said sleeve and connected thereto by said eutectic alloy, said cup shaped member having an abutment portion normally disposed contiguous to said cover member, and resilient means in engagement with said abutment portion urging said cup shaped member toward said diaphragm for operating engagement with said diaphragm upon melting of the eutectic alloy.
Claim 4
Dependent Claim
154 words
An automatic heat detector that comprises a mounting plate, a detector body secured to said mounting plate, a cover member employed with said body and forming a closed chamber therewith, said cover member having a central flange with a central opening therein, a diaphragm carried by said body inside said chamber, circuit control means in said body and controlled by the position of said diaphragm, a sleeve detachably held in said central opening by an eutectic alloy and having connected thereto a heat transmitting disc portion exteriorly disposed with respect to said cover member, a cup shaped member detachably mounted in said sleeve and connected thereto by said eutectic alloy, said cup shaped member having an abutment portion normally disposed contiguous to said cover member, and resilient means in engagement with said abutment portion urging said cup shaped member toward said diaphragm for operating engagement with said diaphragm upon melting of the eutectic alloy.
Claim 5
Dependent Claim
22 words
An automatic heat detector as defined in claim 1 in which said cup shaped member provides a closure for said cover member.
Claim 6
Dependent Claim
20 words
An automatic heat detector as defined in claim 1 in which said circuit control means includes at least two circuits.
Claim 7
Dependent Claim
27 words
An automatic heat detector as defined in claim 1 in which said resilient means comprises a spring carried on said sleeve between said cover and said cup.
Claim 8
Dependent Claim
26 words
An automatic heat detector as defined in claim 1 in which said resilient means is a spiral spring in engagement with said cover and said cup.
Claim 9
Dependent Claim
26 words
An automatic heat detector as defined in claim 1 in which said cover member and said cup member are of materials of different heat transmission characteristics.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |