US3592055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional sensor
Assignee: THERMO SYSTEMS Inc
•
Filing: 1969-02-12
•
Granted: 1971-07-13
•
Expires: 1989-02-12
Abstract
Abstract A fluid flow sensing instrument having a hot-wire or hot-film sensor mounted on the end of a probe for measuring the velocity of the flowing fluid. The sensor is combined with transducers, as thermocouple junctions, for sensing nonuniform distribution of heat on the sensor and generating an EMF which indicates the velocity vector of the flowing fluid.
Inventors
- 👤 Frank D Dorman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:26
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/68; G01F1/684; G01F1/688; G01F1/69; G01P; G01P5/00; G01P5/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
71 words
A fluid properties sensor comprising: electrically conductive sensing material, means for supplying electrical current to the sensing material, a coating of nonconductive material on the surface of the sensing material, a metal film sUrrounding said coating, and transducer means associated with spaced portions of the sensing material to sense nonuniform distribution of heat on the sensing material, said transducer means comprising thermocouple junctions on opposite end portions of the metal film.
Claim 2
Dependent Claim
71 words
A fluid properties sensor comprising: electrically conductive sensing material, means for supplying electrical current to the sensing material, a coating of nonconductive material on the surface of the sensing material, a metal film sUrrounding said coating, and transducer means associated with spaced portions of the sensing material to sense nonuniform distribution of heat on the sensing material, said transducer means comprising thermocouple junctions on opposite end portions of the metal film.
Claim 3
Dependent Claim
19 words
The sensor of claim 1 including: a second coating of nonconductive material covering the metal film and transducer means.
Claim 4
Dependent Claim
93 words
A fluid properties sensor comprising: electrically conductive sensing material, means supplying electrical current to the sensing material, a coating of nonconductive material on the outer surface of the sensing material, transducer means associated with portions of the sensing material to sense nonuniform distribution of heat on the sensing material, said transducer means comprising a first film surrounding the sensing material, and second films of dissimilar material from the first film joined to opposite ends of the first film, said first and second films being in contact with each other to form thermocouple junctions.
Claim 5
Dependent Claim
93 words
A fluid properties sensor comprising: electrically conductive sensing material, means supplying electrical current to the sensing material, a coating of nonconductive material on the outer surface of the sensing material, transducer means associated with portions of the sensing material to sense nonuniform distribution of heat on the sensing material, said transducer means comprising a first film surrounding the sensing material, and second films of dissimilar material from the first film joined to opposite ends of the first film, said first and second films being in contact with each other to form thermocouple junctions.
Claim 6
Dependent Claim
20 words
The sensor of claim 3 including: a second coating of nonconductive material covering the first film and the second films.
Claim 7
Dependent Claim
86 words
A fluid properties sensor comprising: electrically conductive sensing material comprising a wire having thermocouple material characteristics, a rod of electrically insulative material, said wire being spirally wound around said rod, and transducer means associated with spaced portions of the sensor material to sense nonuniform distribution of heat on the sensing material, said transducing means being members secured to portions of the wire, said members being of a material dissimilar to the wire material to form thermocouple junctions at the connections between the wire and the members.
Claim 8
Dependent Claim
86 words
A fluid properties sensor comprising: electrically conductive sensing material comprising a wire having thermocouple material characteristics, a rod of electrically insulative material, said wire being spirally wound around said rod, and transducer means associated with spaced portions of the sensor material to sense nonuniform distribution of heat on the sensing material, said transducing means being members secured to portions of the wire, said members being of a material dissimilar to the wire material to form thermocouple junctions at the connections between the wire and the members.
Claim 9
Dependent Claim
105 words
A fluid properties sensor comprising: electrically conductive sensing material, a tubular member of nonconductive material, said electrically conductive sensing material secured to the midportion of said tubular member, means for supplying electrical current to the sensing material, and transducer means associated with spaced portions with the sensing material, said transducer means comprising in first wire of first thermocouple material located axially in said tubular member and second wires projected into the tubular member and joined into the ends of the first wire with connections to form spaced thermocouple junctions located within said tubular member, said second wires being of material dissimilar from the first wire.
Claim 10
Dependent Claim
105 words
A fluid properties sensor comprising: electrically conductive sensing material, a tubular member of nonconductive material, said electrically conductive sensing material secured to the midportion of said tubular member, means for supplying electrical current to the sensing material, and transducer means associated with spaced portions with the sensing material, said transducer means comprising in first wire of first thermocouple material located axially in said tubular member and second wires projected into the tubular member and joined into the ends of the first wire with connections to form spaced thermocouple junctions located within said tubular member, said second wires being of material dissimilar from the first wire.
Claim 11
Dependent Claim
13 words
The sensor of claim 6 wherein: the sensing material is a cylindrical member.
Claim 12
Dependent Claim
14 words
The sensor of claim 1 wherein: the sensing material is an elongated cylindrical member.
Claim 13
Dependent Claim
24 words
The sensor of claim 1 including: rod means carrying the electrically conductive sensing material, said sensing material being a film surrounding said rod means.
Claim 14
Dependent Claim
14 words
The sensor of claim 3 wherein: the sensing material is an elongated cylindrical member.
Claim 15
Dependent Claim
18 words
The sensor of claim 6 wherein: the electrically conductive sensing material is a film surrounding the tubular member.
Claim 16
Dependent Claim
17 words
The sensor of claim 11 including: a coating of nonconductive material covering the electrically conductive sensing material.
References Cited (Backward Citations)
US1902427A
Cited
US2870305A
Cited
US2896452A
Cited
US3229522A
Cited
US3352154A
Cited
US3498127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |