Patent US3774872A successfully refreshed from Google Patents.
US3774872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projector table cabinet
Assignee: Individual
•
Filing: 1971-03-17
•
Granted: 1973-11-27
•
Expires: 1991-03-17
Abstract
Abstract Projector cabinet stand having a manual rack and pinion elevatable projector platform above the base, with a rack lock and resilient weight balancing extensible columns extending from the underside of the platform to the bottom of the cabinet, support rods are provided for the platform having rod guides affixed to an inside wall of the cabinet, with locking means for the rods, the cabinet also having casters, and retractable legs pivotally mounted upon the underside of the cabinet.
Inventors
- 👤 B Morelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:22
CPC Classifications
A; A47; A47B; A47B37/00; A47B37/02; A47B2200/00; A47B2200/0035; A47B2200/005; A47B2200/0065
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
184 words
An adjustable film projector stand comprising, in combination: a. a cabinet base having rectangular upper and lower walls; b. means for selectively raising and lowering said upper wall while maintaining the upper surface thereof in a horizontal plane; c. a caster affixed to the under side of said lower wall adjacent each of the four corners thereof; d. two pairs of legs extending respectively from two spaced rack shafts pivotally mounted along opposite sides of said under side of said lower wall; e. a pair of manually operable shafts mounted along said under side of said lower wall and extending substantially parallel to one another and to said rack shafts; f. a toggle linkage connecting each of said rack shafts to a respective one of said manually operable shafts; and g. an operating lever extending from each of said manually operable shafts and selectively movable to transmit motion through said toggle linkages to said rack shafts to move said legs between an extended position, wherein said cabinet is supported on said legs, and a retracted position, wherein said cabinet is supported on said casters.
Claim 2
Dependent Claim
184 words
An adjustable film projector stand comprising, in combination: a. a cabinet base having rectangular upper and lower walls; b. means for selectively raising and lowering said upper wall while maintaining the upper surface thereof in a horizontal plane; c. a caster affixed to the under side of said lower wall adjacent each of the four corners thereof; d. two pairs of legs extending respectively from two spaced rack shafts pivotally mounted along opposite sides of said under side of said lower wall; e. a pair of manually operable shafts mounted along said under side of said lower wall and extending substantially parallel to one another and to said rack shafts; f. a toggle linkage connecting each of said rack shafts to a respective one of said manually operable shafts; and g. an operating lever extending from each of said manually operable shafts and selectively movable to transmit motion through said toggle linkages to said rack shafts to move said legs between an extended position, wherein said cabinet is supported on said legs, and a retracted position, wherein said cabinet is supported on said casters.
Claim 3
Dependent Claim
53 words
The invention according to claim 1 wherein said raising and lowering means comprises a rack depending from the under side of said upper wall, gear means engaged with said rack and rotatable to effect vertical movement thereof, and both means selectively engageable with said rack to maintain the latter in any desired position.
Claim 4
Dependent Claim
54 words
The invention according to claim 2 and further including support rods depending from said under side of said upper wall on the side opposite said rack, and means for locking said roDs in any desired vertical position, thereby assisting said rack in maintaining said upper surface of said upper wall in a horizontal plane.
Claim 5
Dependent Claim
29 words
The invention according to claim 2 and further including resilient weight balancing extensible column devices on either side of said rack and extending between said upper and lower walls.
References Cited (Backward Citations)
US165965A
Cited
US281494A
Cited
US443152A
Cited
US1034443A
Cited
US1417948A
Cited
US2192337A
Cited
US2249455A
Cited
US2890010A
Cited
US3150615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |