Patent US4152852A successfully refreshed from Google Patents.
US4152852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparency viewer assembly
Assignee: Knox Manufacturing Co
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Filing: 1978-01-12
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Granted: 1979-05-08
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Expires: 1998-01-12
Abstract
Abstract A pair of illuminated transparency viewers may be mounted on a supporting frame assembly so that one viewer generally provides a horizontally oriented viewing surface and the other viewer generally provides a vertically oriented viewing surface. The frame assembly includes a base portion adapted to receive the legs of one of the viewers and an upright portion adapted to receive the legs of the other viewer. The base portion and the upright portion each have a U-shaped cross section to define an open channel into which the respective legs of the viewers are inserted and secured by appropriate means. Two frame assemblies are utilized to mount the viewers which have two leg assemblies, each of which, in turn, has a leg pivotally mounted for movement between retracted and extended positions.
Inventors
- 👤 Donald J. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:24
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/022; G02B27/024
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
208 words
In combination with a transparency viewer having a housing with a translucent top surface, illuminating means within the housing and a pair of spaced leg assemblies extending from the bottom surface of said housing, a pair of supporting frame assemblies for supporting a pair of said viewers, each supporting frame assembly comprising: a base frame portion adapted to be positioned on and supported by a supporting surface, said base frame portion having an open channel facing upwardly of a size at least as great as that of the leg assembly of a first viewer; first means for releasably securing the leg assembly of said first viewer to said base frame portion when said leg assembly is inserted into said channel of said base frame portion; a generally upright frame portion connected to said base frame portion rearward of said channel of said base frame portion, extending upwardly from said base frame portion and having an open channel facing forwardly of a size at least as great as that of the leg assembly of a second viewer; and second means for releasably securing the leg assembly of said second viewer to said upright frame portion when the leg assembly is inserted into said channel of said upright frame portion.
Claim 2
Dependent Claim
208 words
In combination with a transparency viewer having a housing with a translucent top surface, illuminating means within the housing and a pair of spaced leg assemblies extending from the bottom surface of said housing, a pair of supporting frame assemblies for supporting a pair of said viewers, each supporting frame assembly comprising: a base frame portion adapted to be positioned on and supported by a supporting surface, said base frame portion having an open channel facing upwardly of a size at least as great as that of the leg assembly of a first viewer; first means for releasably securing the leg assembly of said first viewer to said base frame portion when said leg assembly is inserted into said channel of said base frame portion; a generally upright frame portion connected to said base frame portion rearward of said channel of said base frame portion, extending upwardly from said base frame portion and having an open channel facing forwardly of a size at least as great as that of the leg assembly of a second viewer; and second means for releasably securing the leg assembly of said second viewer to said upright frame portion when the leg assembly is inserted into said channel of said upright frame portion.
Claim 3
Dependent Claim
30 words
The combination of claim 1 wherein each of said frame portions has a generally U-shaped cross section with center section and spaced apart side walls defining their respective open channels.
Claim 4
Dependent Claim
146 words
The combination of claim 2 wherein each of said leg assemblies includes a bracket secured to the bottom surface of the housing and a leg pivotally mounted to said bracket swing from a retracted position in close alignment with the bottom surface of the housing and an extended position outward from the bottom surface of the housing, said bracket having a generally U-shaped cross section with a center section secured to the bottom surface of the housing and spaced apart side walls depending from said bracket center section and extending outward from the bottom surface of the housing between which the leg is mounted, said side walls of each of said frame portions being spaced apart a distance slightly greater than said side walls of said bracket so that said bracket may be inserted between the side walls into said open channel of either frame portion.
Claim 5
Dependent Claim
73 words
The combination of claim 3 wherein said leg assemblies have resilient pads, the side walls of said frame portions defining a channel having a depth less than the height of said leg assemblies so that said pads rest on the center section of said frame members when the leg assemblies are inserted with the ends of the side walls of the frame portions being spaced slightly from the bottom surface of said housing.
Claim 6
Dependent Claim
21 words
The combination of claim 4 wherein said base portion has resilient pads which act as feet for said supporting frame assembly.
Claim 7
Dependent Claim
49 words
The combination of claim 1 wherein said upright frame portion has a lower end connected to said base portion and an upper end positioned above and rearward of said lower end so that a viewer secured to said upright frame portion is held in a position tilted from vertical.
Claim 8
Dependent Claim
19 words
The combination of claim 6 wherein the angle defined between said base and upright frame portions is approximately 70°.
Claim 9
Dependent Claim
79 words
The combination of claim 1 wherein each of said leg assemblies includes a leg member pivotally mounted on the bottom surface of said housing for swinging movement between a retracted position in close alignment with the bottom surface of the housing and an extended position outward from said bottom surface of the housing, and further including means for releasably securing each leg in its retracted position, said first and second means securing the respective legs and frame portions together.
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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) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |