Patent US4374379A successfully refreshed from Google Patents.
US4374379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture sensing device for pipes and the like
Assignee: Individual
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Filing: 1980-08-25
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Granted: 1983-02-15
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Expires: 2000-08-25
Abstract
Abstract A moisture sensing device for application to water pipes and the like utilizes a pair of closely spaced electrical conductors partially positioned in an elongated flexible insulating member which can be adhesively affixed to a water pipe or the like with the spaced partially exposed electrical conductors in oppositely disposed relation to the pipe. An alarm actuating circuit is connected with the spaced conductors and arranged to initiate an alarm when moisture bridges the closely spaced conductors.
Inventors
- 👤 Everett G. Dennison, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:06
CPC Classifications
G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/16; G01M3/18; G08; G08B; G08B21/00; G08B21/18; G08B21/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
A device capable of detecting an extremely small drop of liquid associated with a leak from a pipe or the like comprising an alarm means, an elongated strip of insulating material having inner and outer faces, spaced longitudinally extending electrical conductors partially embedded in said strip, continuous portions of each of said conductors exposed on said outer face of said strip, said conductors being closely spaced to one another with a maximum spacing of about 3/64th of an inch therebetween so that extremely small particles of liquid can be detected, means on the inner face of said strip for mounting said strip to said pipe or the like, said electrical conductors connected with said alarm means, said alarm means arranged to initiate an alarm upon moisture bridging said electrical conductors.
Claim 2
Independent Claim
130 words
A device capable of detecting an extremely small drop of liquid associated with a leak from a pipe or the like comprising an alarm means, an elongated strip of insulating material having inner and outer faces, spaced longitudinally extending electrical conductors partially embedded in said strip, continuous portions of each of said conductors exposed on said outer face of said strip, said conductors being closely spaced to one another with a maximum spacing of about 3/64th of an inch therebetween so that extremely small particles of liquid can be detected, means on the inner face of said strip for mounting said strip to said pipe or the like, said electrical conductors connected with said alarm means, said alarm means arranged to initiate an alarm upon moisture bridging said electrical conductors.
Claim 3
Dependent Claim
24 words
The device of claim 1 and wherein said elongated strip is flexible dielectric material, the inner and outer faces thereof being substantially transversely flat.
Claim 4
Dependent Claim
34 words
The device of claim 1 and wherein said elongated strip is a continuous section of insulated two conductor electric wire with the insulation material thereof arranged to expose parallel longitudinal portions of said conductors.
Claim 5
Dependent Claim
42 words
The device of claim 1 and wherein said conductors are cross sectionally small, closely spaced with respect to one another and the strip of insulating material is about 1/32 of an inch thick and less than 5/8 of an inch in width.
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) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |