Patent US4610552A successfully refreshed from Google Patents.
US4610552A
Expired / Lapsed
US
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Temperature sensor for cables
Assignee: Junkosha Co Ltd
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Filing: 1984-07-09
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Granted: 1986-09-09
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Expires: 2004-07-09
Abstract
Abstract A temperature sensor is provided comprising a conductor having a low-melting-point, a fibrous insulating layer adjacent the low-melting-point conductor and separating it from a second conductor. An oscillator applying a pulse signal to the sensor and a receiver receiving the pulse signal through the sensor can detect changes in the signal wave form due to melting or distortion of the low-melting-point conductor. The specific temperature to be sensed can be preset by providing preheating of the sensor, as by Joule heating, by passing a current through the low-melting-point conductor.
Inventors
- 👤 Satoru Kobayashi
- 👤 Yoshiaki Sato
- 👤 Haruo Imaizumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:25
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/06; G01K3/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
A temperature sensor system comprising a temperature-sensing cable having a metal conductor having a low-melting point, a fibrous insulating layer arranged adjacent said low-melting-point conductor separating said low-melting point conductor from another conductor arranged adjacent and substantially parallel to said low-melting-point conductor, an oscillator applying pulsed electrical signal waveforms at a selected location of said temperature-sensing cable, and at least one receiver at a second selected location of said cable for receiving said pulse signal waveforms appllied to said temperature-sensing cable, thereby sensing changes in said temperature-sensing cable due to temperature changes which cause distortion of said low-melting-point conductor by a change in the signal waveform received by said receiver.
Claim 2
Dependent Claim
110 words
A temperature sensor system comprising a temperature-sensing cable having a metal conductor having a low-melting point, a fibrous insulating layer arranged adjacent said low-melting-point conductor separating said low-melting point conductor from another conductor arranged adjacent and substantially parallel to said low-melting-point conductor, an oscillator applying pulsed electrical signal waveforms at a selected location of said temperature-sensing cable, and at least one receiver at a second selected location of said cable for receiving said pulse signal waveforms appllied to said temperature-sensing cable, thereby sensing changes in said temperature-sensing cable due to temperature changes which cause distortion of said low-melting-point conductor by a change in the signal waveform received by said receiver.
Claim 3
Dependent Claim
41 words
The temperature sensor system as defined in claim 1 wherein said temperature-sensing cable has said fibrous insulating layer arranged around the outer circumference of said low-melting-point conductor, and an external conductor is arranged around the outer circumference of said insulating layer.
Claim 4
Dependent Claim
37 words
The temperature sensor as defined in claim 1 wherein said temperature-sensing cable has juxtaposed a plurality of assemblies, each of said assemblies formed by arranging a fibrous insulating layer around the outer circumference of a low-melting-point conductor.
Claim 5
Dependent Claim
37 words
The temperature sensing system as defined in claim 1 wherein said temperature-sensing cable is an assembly formed by arranging said fibrous insulating layer around the outer circumference of said low-melting-point conductor and twisted with an insulated wire.
Claim 6
Dependent Claim
20 words
The temperature-sensing system of claim 1 wherein said low-melting-point conductor is oriented around the outer circumference of said insulating layer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |