Patent US3757766A successfully refreshed from Google Patents.
US3757766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wood heater with viewing window
Assignee: Individual
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Filing: 1971-10-26
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Granted: 1973-09-11
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Expires: 1991-10-26
Abstract
Abstract A heater having an enlarged side window for viewing a fire within the heater. The window is supported in a side projecting window housing having top vent means serving to prevent soot from gathering on the inside surface of the window. A collapsible door is hinged at the bottom in the window housing and has a down or open position and an up or closed position, the latter position shielding the window from the firebox in the heater. Operating knobs are secured to the door and project through slots in the ends of the window housing. Such knobs have a locked position at the top of the slot for holding the collapsible door in its up position.
Inventors
- 👤 R Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:43
CPC Classifications
F; F24; F24B; F24B13/00; F24B13/004
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
A heater comprising a firebox having forward and rearward ends, a loading door in one of said ends, an enlarged opening in the side of said firebox, a window housing secured to said firebox in laterally projecting relation in the area of said opening, said housing having top and bottom walls as well as end walls and an outer side wall, means in said side wall defining an opening of enlarged size disposed in substantial horizontal alignment with the opening in the side of the firebox, a transparent window pane covering said opening in the side wall of said window housing, and a collapsible door in said window housing disposed inwardly toward said firebox relative to said window, said collapsible door having a lower open position exposing said window to the firebox and an upper closed position shielding the window from the firebox.
Claim 2
Dependent Claim
143 words
A heater comprising a firebox having forward and rearward ends, a loading door in one of said ends, an enlarged opening in the side of said firebox, a window housing secured to said firebox in laterally projecting relation in the area of said opening, said housing having top and bottom walls as well as end walls and an outer side wall, means in said side wall defining an opening of enlarged size disposed in substantial horizontal alignment with the opening in the side of the firebox, a transparent window pane covering said opening in the side wall of said window housing, and a collapsible door in said window housing disposed inwardly toward said firebox relative to said window, said collapsible door having a lower open position exposing said window to the firebox and an upper closed position shielding the window from the firebox.
Claim 3
Dependent Claim
25 words
The heater of claim 1 including vent means in the top wall of said window housing disposed inwardly toward said firebox relative to said window.
Claim 4
Dependent Claim
37 words
The heater of claim 1 including vent means in the top wall of said window housing disposed inwardly toward said firebox relative to said window, said vent means extending substantially the full length of said window housing.
Claim 5
Dependent Claim
66 words
The heater of claim 1 wherein said collapsible door comprises at least two plates longitudinally hinged together with one of said plates longitudinally hinged to the bottom of said window housing whereby said door in its lower position is folded with the plates lying one above the other in substantially parallel relation and in its upper position is expanded with the plates substantially in vertical alignment.
Claim 6
Dependent Claim
57 words
The heater of claim 4 including a longitudinally extending stem secured to an end edge of an uppermost one of said plates, said stem extending through a vertical slot in one of said end walls of the window housing for manual engagement whereby to open and close said door by moving said stem vertically in said slot.
Claim 7
Dependent Claim
84 words
The heater of claim 4 including a longitudinally extending stem secured to an end edge of an uppermost one of said plates, said stem extending through a vertical slot in one of said end walls of the window housing for manual engagement whereby to open and close said door by moving said stem vertically in said slot, and means defining a notch leading angularly from said slot at the upper end thereof for receiving said stem to hold the door in its closed position.
References Cited (Backward Citations)
US1349562A
Cited
US2789554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |