Patent US3653262A successfully refreshed from Google Patents.
US3653262A
Expired / Lapsed
US
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Temperature and level sensor
Assignee: METRITAKE Inc
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Filing: 1970-10-22
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Granted: 1972-04-04
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Expires: 1990-10-22
Abstract
Abstract An elongated sensor adapted to be suspended within a fluent material and operative to measure the level of the material and the temperature at one or more positions within the material bulk.
Inventors
- 👤 Albert D Ehrenfried
- 👤 John Niejadlik
- 👤 Norton T Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:35
CPC Classifications
G; G01; G01K; G01K13/00; G01K13/10; G01F; G01F23/00; G01F23/22; G01F23/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
151 words
A temperature and level sensor comprising: An electrically conductive base strip; an insulative material partially surrounding said base strip to define an uninsulated opening along the length of one side of said base strip; a level sensing winding including a wire helically wound around the insulated base strip, the portions of the wire bridging the uninsulated opening being adapted to contact respective exposed confronting portions of the base strip in the presence of surrounding pressure; a flexible jacket surrounding said insulated base strip and said helical wire, and being sensitive to surrounding pressure; temperature sensing means disposed within said jacket in predetermined disposition along the length of said base strip; at least one of said base strip and said helical wire being resistive; said base strip and said helical wire being adapted for connection to level monitoring circuitry; and said temperature sensing means being adapted for connection to temperature monitoring circuitry.
Claim 2
Dependent Claim
151 words
A temperature and level sensor comprising: An electrically conductive base strip; an insulative material partially surrounding said base strip to define an uninsulated opening along the length of one side of said base strip; a level sensing winding including a wire helically wound around the insulated base strip, the portions of the wire bridging the uninsulated opening being adapted to contact respective exposed confronting portions of the base strip in the presence of surrounding pressure; a flexible jacket surrounding said insulated base strip and said helical wire, and being sensitive to surrounding pressure; temperature sensing means disposed within said jacket in predetermined disposition along the length of said base strip; at least one of said base strip and said helical wire being resistive; said base strip and said helical wire being adapted for connection to level monitoring circuitry; and said temperature sensing means being adapted for connection to temperature monitoring circuitry.
Claim 3
Dependent Claim
44 words
A temperature and level sensor according to a claim 1 wherein said temperature sensing means includes an insulative resistance temperature dependent wire helically wound together with said level sensing winding in bifilar manner around said insulated base strip substantially along the full length thereof.
Claim 4
Dependent Claim
96 words
A temperature and level sensor according to claim 2 wherein said resistance temperature dependent wire includes a plurality of electrical connections each disposed at a respective position along the length thereof; a temperature monitoring circuit coupled to said plurality of connections; and a level monitoring circuit coupled to said base strip and said helical wire; and a selector circuit coupled to said level monitoring circuit and said temperature monitoring circuit and operative to provide an output indication of temperature in one or more zones along the length of said sensor defined by said plurality of connections.
Claim 5
Dependent Claim
35 words
A temperature and level sensor according to claim 1 wherein said temperature sensing means includes a plurality of discrete temperature sensing elements each disposed at a respective position along the length of said base strip.
Claim 6
Dependent Claim
70 words
A temperature and level sensor according to claim 1 including an elongated insulative strip substantially co-extensive with said conductive base strip and disposed in association therewith; and a plurality of conductive paths formed on a surface of said insulative strip; and wherein said temperature sensing means includes a plurality of temperature sensing elements, each disposed on said insulative strip and each connected between a respective pair of said conductive paths.
Claim 7
Dependent Claim
27 words
A temperature and level sensor according to claim 5 wherein said insulative strip is attached to said conductive base strip on a side opposite said uninsulated opening.
Claim 8
Dependent Claim
60 words
A temperature and level sensor according to claim 5 including a resilient spacer member mounted on a substantially coextensive with the surface of said base strip opposite said uninsulated opening; and wherein said insulated strip is attached to said resilient spacer member with said conductive paths in confronting relation therewith and said temperature sensing elements disposed within said spacer member.
Claim 9
Dependent Claim
56 words
A temperature and level sensor according to claim 1 including: first circuit means connected to said base strip and said helical wire and operative to provide an output indication of material level; and second circuit means connected to said temperature sensing means for providing an output indication of temperature along a predetermined portion of said sensor.
Claim 10
Dependent Claim
44 words
A temperature and level sensor according to claim 1 including: a temperature monitoring circuit; a level monitoring circuit; means connecting said base strip and said helical wire to said level monitoring circuit; and means connecting said temperature sensing means to said temperature monitoring circuit.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |