US4196953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Darkroom module
Assignee: Individual
•
Filing: 1976-08-16
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Granted: 1980-04-08
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Expires: 1996-08-16
Abstract
Abstract Amateur photographers who print and develop their own photographs often set up a temporary darkroom in a bathroom. This invention, entitled "darkroom module" is to be placed in front of an open door of a room, such as a bathroom, to facilitate the use of the room as a darkroom by providing: a light seal enabling the bathroom to be light-tight a working area which permits the permanent mounting of photographic equipment such as an enlarger, timer, color analyzer, etc. storage area a light-proof air inlet in which a ventilating fan may be installed, if required, for adequate ventilation electrical outlets for photographic equipment. When the darkroom is not required, the module is to be moved to another location. Since much of the equipment may be mounted permanently and the other equipment may be stored in the module, the setting-up time for conversion of the bathroom to a temporary darkroom is minimized.
Inventors
- 👤 Kalman I. Krakow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:54
CPC Classifications
G; G03; G03D; G03D17/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
219 words
A cabinet unit for use in light sealing a floor-based household dimensioned open doorway having a surrounding wall surface comprising: a moveable housing having a top, a rear wall, a base, at least one shelf, at least one side wall joining said top to said base, and an upright open side, the front face of said top and said side wall defining the frame of said upright open side dimensioned at least slightly larger in height and width than said doorway, light sealing means of opaque soft resilient material secured to and longitudinally coextensive therewith, and also secured to said base and depending downward therefrom toward said floor, means for releasably urging said upright frame toward said surrounding wall surface thereby to compress said light sealing means between said frame and said wall surface and for releasably moving said housing base toward said floor to thereby compress said light sealing means between said base and said floor to thereby light seal the interior of said cabinet unit, a hinged panel containing a portion of said light sealing means hingedly mounted to said housing top at the edge of said open side whereby said hinged panel is free to rotate between a horizontal position and a vertical position, and holding means for maintaining said hinged panel in said vertical position.
Claim 2
Dependent Claim
219 words
A cabinet unit for use in light sealing a floor-based household dimensioned open doorway having a surrounding wall surface comprising: a moveable housing having a top, a rear wall, a base, at least one shelf, at least one side wall joining said top to said base, and an upright open side, the front face of said top and said side wall defining the frame of said upright open side dimensioned at least slightly larger in height and width than said doorway, light sealing means of opaque soft resilient material secured to and longitudinally coextensive therewith, and also secured to said base and depending downward therefrom toward said floor, means for releasably urging said upright frame toward said surrounding wall surface thereby to compress said light sealing means between said frame and said wall surface and for releasably moving said housing base toward said floor to thereby compress said light sealing means between said base and said floor to thereby light seal the interior of said cabinet unit, a hinged panel containing a portion of said light sealing means hingedly mounted to said housing top at the edge of said open side whereby said hinged panel is free to rotate between a horizontal position and a vertical position, and holding means for maintaining said hinged panel in said vertical position.
Claim 3
Dependent Claim
20 words
A cabinet unit as defined in claim 1 which is supported on at least three casters secured to said base.
Claim 4
Dependent Claim
12 words
A cabinet unit as defined in claim 1 including light-proof ventilating means.
Claim 5
Dependent Claim
26 words
A cabinet unit as defined in claim 1 including multiple electrical outlets connected to an electrical extension cord adaptable for connection to an existing electrical outlet.
Claim 6
Dependent Claim
35 words
A cabinet unit as defined in claim 1 wherein said urging means comprises braking means operative to firmly maintain said open side against said open doorway to thereby maintain said light sealing means in compression.
Claim 7
Dependent Claim
77 words
A cabinet unit as defined in claim 5 wherein said braking means comprises a friction plate, at least one arm pivotally connected at its upper end to said housing base and pivotally connected at its lower end to said friction plate whereby the slope of said arm for all positions thereof is directed away from said open side of said housing, and a means for raising and lowering and maintaining said friction plate in a raised position.
Claim 8
Dependent Claim
70 words
A cabinet unit as defined in claim 5 wherein said braking means comprises a friction plate rigidly attached to at least one arm pivotally connected at its upper end to said cabinet unit base whereby the slope of said arm for all positions thereof is directed away from said open side of said cabinet unit and a means for raising lowering and maintaining said friction plate in a raised position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-08 | 1983-10-08 | 1984-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-08 | 1987-10-08 | 1988-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-08 | 1991-10-08 | 1992-04-08 | $7700.00 | Window Closed / Lapsed |