US3919680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature detector head
Assignee: Hitachi Ltd
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Filing: 1974-06-25
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Granted: 1975-11-11
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Expires: 1994-06-25
Abstract
Abstract A structure of detector head for a high temperature measuring device utilizes a small disk of thermistor as the detecting element and is adapted to be directly mounted on to the wall of a high temperature body such as an engine cylinder block, the resultant advantages being quick response, simple structure, easy and versatile mounting and reliable operation.
Inventors
- 👤 Sadayasu Ueno
- 👤 Yukio Hosho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:04
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
A temperature detector head comprising a hollow plug member having means for securing said plug member to a body for measuring the temperature of the body, a generally tube-like insulator hermetically fitted into said plug member, a metal rod slidably fitted into said tube-like insulator, one end of said metal rod protruding out of said insulator and said plug member, a spring provided against the other end of said metal rod so as to push said rod in the axial direction toward said one end, and a piece of thermistor provided on said one end of said metal rod, wherein said metal rod and the bore of said tube-like insulator are stepped in diameter so as to prevent said rod from coming off said insulator.
Claim 2
Dependent Claim
125 words
A temperature detector head comprising a hollow plug member having means for securing said plug member to a body for measuring the temperature of the body, a generally tube-like insulator hermetically fitted into said plug member, a metal rod slidably fitted into said tube-like insulator, one end of said metal rod protruding out of said insulator and said plug member, a spring provided against the other end of said metal rod so as to push said rod in the axial direction toward said one end, and a piece of thermistor provided on said one end of said metal rod, wherein said metal rod and the bore of said tube-like insulator are stepped in diameter so as to prevent said rod from coming off said insulator.
Claim 3
Dependent Claim
135 words
A temperature detector head comprising a hollow plug member having means for securing said plug member to a body for measuring the temperature of said body, a generally tube-like insulator hermetically fitted into said plug member, a metal rod slidably fitted into said tube-like insulator, one end of said metal rod protruding out of said insulator and said plug member, a spring provided against the other end of said metal rod so as to push said rod in the axial direction toward said one end, and a piece of thermistor provided on said one end of said metal rod, wherein said other end of said metal rod protrudes out of said tube-like insulator and into a cylindrical metal case attached to the end of said insulator and said spring is encased in said cylindrical case.
Claim 4
Dependent Claim
135 words
A temperature detector head comprising a hollow plug member having means for securing said plug member to a body for measuring the temperature of said body, a generally tube-like insulator hermetically fitted into said plug member, a metal rod slidably fitted into said tube-like insulator, one end of said metal rod protruding out of said insulator and said plug member, a spring provided against the other end of said metal rod so as to push said rod in the axial direction toward said one end, and a piece of thermistor provided on said one end of said metal rod, wherein said other end of said metal rod protrudes out of said tube-like insulator and into a cylindrical metal case attached to the end of said insulator and said spring is encased in said cylindrical case.
Claim 5
Dependent Claim
49 words
A temperature detector head according to claim 1, wherein there is included a spacer of insulating material which is attached at one end thereof to said one end of said metal rod and has a cavity at the opposite end thereof into which said piece of thermistor is fitted.
Claim 6
Dependent Claim
48 words
A temperature detector head according to claim 3, wherein said spacer has a bore by which said one end of said spacer communicates with said cavity so that a conductor for said thermistor is drawn therethrough, and said spacer is provided with a metal cap covering said cavity.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |