US4881055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature-fluid sensor
Assignee: Ingersoll Rand Co
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Filing: 1988-11-10
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Granted: 1989-11-14
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Expires: 2008-11-10
Abstract
Abstract The Sensor is designed for use in detecting fire, or high temperature in vessels or pipes pressurized with air, gas or liquids. It has a polymer body which confines electrical conductors, and the conductors project from opposite ends of the body. The conductors' projections at one end define terminal blades, and at the opposite end are shrouded with, and electrically connected by, fusible material that has been molded in place. The body has wrenching flats thereabout and tapered pipe threads thereon to allow its installation in the wall of a pressure vessel, pipe, or housing, with the fusible-material end exposed therewithin.
Inventors
- 👤 F. William Capp
- 👤 Don J. Gerhardt
- 👤 Randal A. Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:04
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/74; H01H37/76; H01H37/761
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
119 words
A high-temperature-fluid sensor, with a fusible detector, comprising: a body having a longitudinal axis; and a pair of electrical conductors, confined within said body, lying generally parallel with said axis; wherein portions of said conductors, of said pair thereof, project from opposite axial ends of said body; and including fusible, electrically conductive material engaged with, and electrically bridging between those said conductors' portions which project from one of said axial ends of said body; wherein said conductors' portions, which project from said one end of said body, are spaced-apart, in juxtaposition, defining a void therebetween; a buffer, of electrically non-conductive material, is confined within said void; and said buffer has means formed therein for securing said fusible material thereto.
Claim 2
Dependent Claim
119 words
A high-temperature-fluid sensor, with a fusible detector, comprising: a body having a longitudinal axis; and a pair of electrical conductors, confined within said body, lying generally parallel with said axis; wherein portions of said conductors, of said pair thereof, project from opposite axial ends of said body; and including fusible, electrically conductive material engaged with, and electrically bridging between those said conductors' portions which project from one of said axial ends of said body; wherein said conductors' portions, which project from said one end of said body, are spaced-apart, in juxtaposition, defining a void therebetween; a buffer, of electrically non-conductive material, is confined within said void; and said buffer has means formed therein for securing said fusible material thereto.
Claim 3
Dependent Claim
28 words
A sensor, according to claim 1, wherein: said securing means in said buffer comprises a recess; and said fusible material has a portion thereof set in said recess.
Claim 4
Dependent Claim
17 words
A sensor, according to claim 1, wherein: one of said ends of said body is externally threaded.
Claim 5
Dependent Claim
17 words
A sensor, according to claim 1, wherein: both of said ends of said body are externally threaded.
Claim 6
Dependent Claim
70 words
A sensor, according to claim 1, wherein: said one end of said body has a shank portion, a stub portion, and a transformation portion, intermediate, and contiguous with, said shank and stub portions; said spaced-apart, juxtapositioned, conductors' portions project from said stub portion; and said transformation portion comprises means for accommodating a flow of said fusible material, upon the latter becoming molten, from said stub portion to said shank portion.
Claim 7
Dependent Claim
14 words
A sensor, according to claim 5, wherein: said transformation portion is of tapered configuration.
Claim 8
Dependent Claim
34 words
A sensor, according to claim 5, wherein: said buffer has a recess formed therein; and said recess has a ramp which terminates at an end, and onto an outer surface, of said stub portion.
Claim 9
Dependent Claim
18 words
A sensor, according to claim 1, wherein: said body and said buffer comprise a single, common, unitized structure.
Claim 10
Dependent Claim
22 words
A sensor, according to claim 8, wherein: said body and said buffer are formed from a polymer having a high-strength reinforcement therein.
Claim 11
Dependent Claim
28 words
A sensor, according to claim 1, wherein: said body is formed from a polymer taken from a group consisting of polyphenylene sulfide, liquid crystal polymer, and polyetherimide resin.
Claim 12
Dependent Claim
15 words
A sensor, according to claim 10, wherein: said polymer has a glass reinforcement dispersed therein.
Claim 13
Dependent Claim
33 words
A sensor, according to claim 10, wherein: said body comprises from approximately 60 to 90 percent of said polymer, and from 10 to 40 percent of a reinforcing material dispersed in said polymer.
Claim 14
Dependent Claim
12 words
A sensor, according to claim 12, wherein: said reinforcing material comprises glass.
Claim 15
Dependent Claim
14 words
A sensor, according to claim 1, wherein: said fusible material is of cylindrical conformation
Claim 16
Dependent Claim
23 words
A sensor, according to claim 1, wherein: said body further has wrenching flats formed thereon, and thereabout, intermediate the ends of said body.
Claim 17
Dependent Claim
24 words
A sensor, according to claim 1, wherein: said body is formed from an electrically non-conductive material having a dielectric strength of approximately 400 volts/mil.
Claim 18
Dependent Claim
28 words
A sensor, according to claim 1, wherein: said body further has pin holes formed in sides thereof which penetrate thereinto and open onto intermediate portions of said conductors.
References Cited (Backward Citations)
US2149773A
Cited
US4016523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |