US3147436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Symmetrical thermopile circuit for measuring electromagnetic wave energy
Assignee: PRD ELECTRONICS Inc
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Filing: 1962-06-19
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Granted: 1964-09-01
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Expires: 1982-06-19
Abstract
No abstract record available.
Inventors
- 👤 Samuel Hopfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:18
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/12; H; H10; H10N; H10N10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A METER FOR INDICATING WAVE ENERGY IN A HOLLOWCONDUCTOR WAVEGUIDE COMPRISING A THERMOPILE FORMED OF AN EVEN NUMBERED PLURALITY OF HOT JUNCTIONS AND A CORRESPONDING PLURALITY OF COLD JUNCTIONS FORMED BETWEEN OVERLAPPING END PORTIONS OF THIN RESISTIVE STRIPS, SAID STRIPS BEING FORMED OF METAL FILMS HAVING A THICKNESS WHICH IS SMALL WITH RESPECT TO THE SKIN-DEPTH OF THE WAVE ENERGY, THE STRIP PORTIONS IN WHICH THE HOT JUNCTIONS ARE FORMED EXTENDING IN PARALLEL RELATION BETWEEN PORTIONS OF SAID WAVEGUIDE FORMING OPPOSING BOUNDARIES OF THE ELECTRIC FIELD THEREIN, WHEREBY PORTIONS OF SAID METAL FILMS ON OPPOSITE SIDES OF EACH HOT JUNCTION ARE HEATED BY THE DIRECT ACTION OF SAID FIELD UPON SAID STRIPS, THE COLD JUNCTIONS BETWEEN SAID METAL FILMS BEING LOCATED OUTSIDE OF THE BOUNDRIES OF SAID ELECTRIC FIELD, AND AN ISOTHERMAL MASS MAINTAINED IN GOOD HEAT TRANSFER CONTACT WITH SAID COLD JUNCTIONS, SAID STRIPS AND THE HOT JUNCTIONS FORMED THEREBY BEING ELECTRICALLY IN SERIES TO PROVIDE A CUMULATIVE E.M.F. GENERATED BY THE DIRECT ACTION OF SAID WAVE ENERGY ON THE THERMOPILE CIRCUIT, WHEREIN THE AMOUNT OF WAVE ENERGY IN SAID WAVEGUIDE IS INDICATED BY A MEASUREMENT OF SAID E.M.F.
Claim 2
Dependent Claim
190 words
A METER FOR INDICATING WAVE ENERGY IN A HOLLOWCONDUCTOR WAVEGUIDE COMPRISING A THERMOPILE FORMED OF AN EVEN NUMBERED PLURALITY OF HOT JUNCTIONS AND A CORRESPONDING PLURALITY OF COLD JUNCTIONS FORMED BETWEEN OVERLAPPING END PORTIONS OF THIN RESISTIVE STRIPS, SAID STRIPS BEING FORMED OF METAL FILMS HAVING A THICKNESS WHICH IS SMALL WITH RESPECT TO THE SKIN-DEPTH OF THE WAVE ENERGY, THE STRIP PORTIONS IN WHICH THE HOT JUNCTIONS ARE FORMED EXTENDING IN PARALLEL RELATION BETWEEN PORTIONS OF SAID WAVEGUIDE FORMING OPPOSING BOUNDARIES OF THE ELECTRIC FIELD THEREIN, WHEREBY PORTIONS OF SAID METAL FILMS ON OPPOSITE SIDES OF EACH HOT JUNCTION ARE HEATED BY THE DIRECT ACTION OF SAID FIELD UPON SAID STRIPS, THE COLD JUNCTIONS BETWEEN SAID METAL FILMS BEING LOCATED OUTSIDE OF THE BOUNDRIES OF SAID ELECTRIC FIELD, AND AN ISOTHERMAL MASS MAINTAINED IN GOOD HEAT TRANSFER CONTACT WITH SAID COLD JUNCTIONS, SAID STRIPS AND THE HOT JUNCTIONS FORMED THEREBY BEING ELECTRICALLY IN SERIES TO PROVIDE A CUMULATIVE E.M.F. GENERATED BY THE DIRECT ACTION OF SAID WAVE ENERGY ON THE THERMOPILE CIRCUIT, WHEREIN THE AMOUNT OF WAVE ENERGY IN SAID WAVEGUIDE IS INDICATED BY A MEASUREMENT OF SAID E.M.F.
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |