US3732729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed sensor
Assignee: Individual
•
Filing: 1971-08-19
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Granted: 1973-05-15
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Expires: 1991-08-19
Abstract
Abstract A speed sensor for mounting on the hull of a boat for sensing the water speed of the boat in which a bank of semi-conductor thermal junction units are mounted in a co-planer thermopile relationship being electrically connected serially; a heating pad mounted on one surface of the co-planer thermopile; and a copper plate juxtaposed to the heating pad and the opposite side of the co-planer thermopile.
Inventors
- 👤 N Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:03
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/10; H; H10; H10N; H10N10/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
A speed sensor comprising: a co-planer semi-conductor thermopile; a heating pad mounted on one surface of said co-planer thermopile; and a heat conductive package completely containing said thermopile and heating pad, said thermopile and heating pad being mounted to an outside surface of a vehicle and said thermopile having an output adapted for coupling to an indicating means.
Claim 2
Dependent Claim
58 words
A speed sensor comprising: a co-planer semi-conductor thermopile; a heating pad mounted on one surface of said co-planer thermopile; and a heat conductive package completely containing said thermopile and heating pad, said thermopile and heating pad being mounted to an outside surface of a vehicle and said thermopile having an output adapted for coupling to an indicating means.
Claim 3
Dependent Claim
45 words
The speed sensor of claim 1 wherein: said heat conductive package is dimensioned for being received by a recess in a submerged surface of a boat hull leaving an air gap between the top surface of said package and the top surface of said recess.
Claim 4
Dependent Claim
36 words
The speed sensor of claim 1 wherein: said heating pad and thermopile are adapted to be mounted to a bottom surface to the hull of a boat at right angles thereto and parallel to water flow.
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |