US5381509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant electric space heater
Assignee: THERMWELL PRODUCTS CO Inc
•
Filing: 1993-04-28
•
Granted: 1995-01-10
•
Expires: 2013-04-28
Abstract
Abstract A radiant electric space heater is provided with a high heat limiting capillary tube thermostat and with a grill which is pivotally mounted so that it may be pivoted to an out-of-the-way position for cleaning.
Inventors
- 👤 Thomas H. Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:49
CPC Classifications
F; F24; F24C; F24C7/00; F24C7/06; F24C7/062; F24C7/065; F24C1/00; F24C1/14; F24C7/08; F24C7/081; F24C7/10; F24C7/105; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; F24H3/0411; F24H3/0417
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
168 words
An electric space heater comprising: a housing having a front wall and a heat-transmitting window in said front wall; a grill covering said window; a reflector assembly mounted within said housing and forming with said housing a heating chamber open to said window; said reflector assembly having heat reflective surface portions facing said window; a source of electrical power; an electrically operated radiant heating assembly connected to said power source, said heating assembly including a heating element located in said housing between said reflective surface portions and said window, operation of said radiant heating assembly creating in said heating chamber a naturally occurring stream of convectively-heated air; and a capillary tube thermostat having terminals electrically connected between said source and said heating element, said thermostat having a capillary tube sensor within said housing extending across said heating chamber window in a position in which it will cause deenergization of said heating assembly in the event an outside influence causes said stream of air to impinge upon said sensor.
Claim 2
Dependent Claim
168 words
An electric space heater comprising: a housing having a front wall and a heat-transmitting window in said front wall; a grill covering said window; a reflector assembly mounted within said housing and forming with said housing a heating chamber open to said window; said reflector assembly having heat reflective surface portions facing said window; a source of electrical power; an electrically operated radiant heating assembly connected to said power source, said heating assembly including a heating element located in said housing between said reflective surface portions and said window, operation of said radiant heating assembly creating in said heating chamber a naturally occurring stream of convectively-heated air; and a capillary tube thermostat having terminals electrically connected between said source and said heating element, said thermostat having a capillary tube sensor within said housing extending across said heating chamber window in a position in which it will cause deenergization of said heating assembly in the event an outside influence causes said stream of air to impinge upon said sensor.
Claim 3
Dependent Claim
45 words
The heater of claim 1 wherein said reflector assembly divides said housing into two chambers, namely said heating chamber and an inner housing chamber, and wherein said capillary tube sensor has a section located within said inner housing chamber that will detect overheating conditions therein.
Claim 4
Dependent Claim
28 words
The heater of claim 2 further comprising a fan for cooling said housing located within said inner housing chamber that, when properly operating, prevents overheating of said housing.
Claim 5
Dependent Claim
71 words
The heater of claim 3 wherein said housing has openings that admit air at ambient temperature into said inner housing chamber and other openings that exhaust fan-forced air from said inner housing chamber, and said reflector assembly is sufficiently imperforate that the operation of said fan will not create significant forced air flow in said heating chamber which would interfere with said naturally occurring convectively-heated air flow in said heating chamber.
Claim 6
Dependent Claim
14 words
The heater of claim 1 wherein said capillary tube sensor extends adjacent said grill.
Claim 7
Dependent Claim
19 words
The heater of claim 5 wherein an intermediate portion of said capillary tube sensor is connected to said grill.
Claim 8
Dependent Claim
84 words
The heater of claim 1 wherein said reflector assembly and said window are so constructed that said naturally occurring stream of air flows upwardly in said heating chamber and out of the upper portion of said window, and wherein the portion of said capillary tube sensor within said heating chamber is located close to the upper edge of said window but beneath said stream of convectively-heated air flowing out of the upper portion of said window when said window and said grill are unobstructed.
References Cited (Backward Citations)
US1429085A
Cited
US2234373A
Cited
US2329592A
Cited
US2491399A
Cited
US2707745A
Cited
US2852657A
Cited
US3051820A
Cited
US3433929A
Cited
US3538307A
Cited
US3731247A
Cited
US3727537A
Cited
US4273990A
Cited
US4700051A
Cited
US5176570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-09 | 1998-07-11 | 1999-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-09 | 2002-07-11 | 2003-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-09 | 2006-07-11 | 2007-01-10 | $7700.00 | Window Closed / Lapsed |