Patent US3654431A successfully refreshed from Google Patents.
US3654431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bunsen burner simulating flameless electric heater
Assignee: GTE Sylvania Inc
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Filing: 1970-08-19
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Granted: 1972-04-04
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Expires: 1990-08-19
Abstract
Abstract A flameless electric heater having a resistance wire heater coil insulated from and positioned within a vertical tubular stack. A constant air flow is directed over the coil establishing a hot air zone at the exit point of the stack. The electric power source to the heater is controlled by a cutoff device that is actuated when the air flow drops below a predetermined pressure, thus preventing overheating and burn-out of the coil of the heater.
Inventors
- 👤 David N Brooks
- 👤 Clyde L Paulauskas
- 👤 Ronald E Edin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:39
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/002
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
161 words
An electric heater comprising: a conical base stand; a socket in said conical base stand, said socket having a central aperture located therein; an electric coil supported in said socket and aligned axially with the central aperture therein; a vertical hollow stack fitted over said electric coil, said stack having a formed nozzle at its upper end and a baffle fitted within said formed nozzle, said baffle spacedly overlying the upper ends of said coil and said stack; a heat shield; means for supporting said heat shield spaced from the upper end of said stack; an air pressure valve connected to said base stand and in communication with said socket and said central aperture located therein; electric power means connected through said base stand to said electric coil; and control means interconnecting said air pressure valve and said electric power means whereby the electric power to said electric coil is controlled by the flow of air through said air pressure valve.
Claim 2
Dependent Claim
161 words
An electric heater comprising: a conical base stand; a socket in said conical base stand, said socket having a central aperture located therein; an electric coil supported in said socket and aligned axially with the central aperture therein; a vertical hollow stack fitted over said electric coil, said stack having a formed nozzle at its upper end and a baffle fitted within said formed nozzle, said baffle spacedly overlying the upper ends of said coil and said stack; a heat shield; means for supporting said heat shield spaced from the upper end of said stack; an air pressure valve connected to said base stand and in communication with said socket and said central aperture located therein; electric power means connected through said base stand to said electric coil; and control means interconnecting said air pressure valve and said electric power means whereby the electric power to said electric coil is controlled by the flow of air through said air pressure valve.
Claim 3
Dependent Claim
34 words
An electric heater according to claim 1 wherein said heat shield supporting means comprises a pair of circular support discs having a series of holes therein for the convection of heat from said stack.
References Cited (Backward Citations)
US1639200A
Cited
US1217229A
Cited
US1824585A
Cited
US2027605A
Cited
CH250103A
Cited
US2439713A
Cited
US3094606A
Cited
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 |