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US3961159A Expired / Lapsed US ⏱️ 0.0 years remaining

Light shield/support device

Assignee: Individual
•
Filing: 1975-06-05
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Granted: 1976-06-01
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Expires: 1995-06-05
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Abstract

Abstract This invention relates to a light shield/support device for reducing glare on the lighted display window of a portable electronic calculator. The device may also be interchangeably utilized to support the calculator in an inclined position which also tends to reduce the glare on the display window as well as making operation of the keyboard and positioning of the calculator on a disk top more convenient. The device includes a pair of spaced shank members having inclined upper ends having an inclined flange member carried therebetween. Attachment means are carried by a lower end of the shank members for engaging opposing side walls for securing the device to the calculator. The shank members are of sufficient length to support the flange member above and across the display window or below and across the bottom of the calculator for selectively utilizing the device as a light shield or as a support.

Inventors

  • 👤 Martin E. Hursey

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 19:10
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/04; G06; G06F; G06F15/00; G06F15/02

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 168 words
A light shield device for reducing glare on the display window of a portable numerical calculator having a housing defined by vertically spaced upper and lower surfaces joined by spaced opposed upright sidewalls, a plurality of numbered and operational keys carried on said upper surface, said display window located on said upper surface for displaying lighted numbers produced by carrying out numerical operations with said keys, said light shield comprising: a pair of spaced shank members; attachment means including an inwardly extending flange carried adjacent a lower portion of each said shank member for being received over the exterior surface of said spaced opposed sidewalls of said housing for removably securing said shank members to said exterior surface of said sidewalls; and an upper hood member integral with said shank members extending substantially above and across said display window for shielding said window and the lighted numbers displayed there from oncoming light effectively reducing the glare thereon so that the lighted numbers are more easily and accurately readable.
Claim 2
Dependent Claim 168 words
A light shield device for reducing glare on the display window of a portable numerical calculator having a housing defined by vertically spaced upper and lower surfaces joined by spaced opposed upright sidewalls, a plurality of numbered and operational keys carried on said upper surface, said display window located on said upper surface for displaying lighted numbers produced by carrying out numerical operations with said keys, said light shield comprising: a pair of spaced shank members; attachment means including an inwardly extending flange carried adjacent a lower portion of each said shank member for being received over the exterior surface of said spaced opposed sidewalls of said housing for removably securing said shank members to said exterior surface of said sidewalls; and an upper hood member integral with said shank members extending substantially above and across said display window for shielding said window and the lighted numbers displayed there from oncoming light effectively reducing the glare thereon so that the lighted numbers are more easily and accurately readable.
Claim 3
Dependent Claim 32 words
The device of claim 1 wherein said shank member includes a pair of spaced shank members receivable over a pair of said spaced, opposed sidewalls; said shank member having inclined upper ends.
Claim 4
Dependent Claim 37 words
The device of claim 2 wherein said flanges are slideably received in a longitudinal groove formed along the exterior surface of said sidewalls so as to be adjustably positionable over said display window on said upper surface.
Claim 5
Dependent Claim 23 words
The device of claim 2 wherein said hood member includes an inclined flange member carried between said upper ends of said shank member.
Claim 6
Dependent Claim 18 words
The device of claim 4 wherein said flange member is inclined at an angle of approximately forty-five degrees.
Claim 7
Dependent Claim 29 words
The device of claim 4 wherein said hood member is defined by said inclined flange member and upper side portions of said shank members extending above said upper surface.
Claim 8
Dependent Claim 22 words
The device of claim 3 wherein said shank members, said hood member, and said inwardly extending flanges are formed as one piece.
Claim 9
Dependent Claim 58 words
The device of claim 2 wherein said attachment means includes an outwardly and downwardly extending portion of said shank member terminating in an inwardly and downwardly extending flange; said portion of each of said spaced shank members being received over the opposed sidewalls of said housing in a slightly spread-apart configuration to provide a spring clip attachment thereto.
Claim 10
Dependent Claim 189 words
A light shield/support device for a portable numerical calculator having a housing defined by vertically spaced upper and lower surfaces joined by spaced opposed sidewalls, a plurality of numbered and operational keys carried on said upper surface, a display window located on said upper surface for displaying lighted numbers thereon, said device comprising: a pair of spaced shank members having inclined upper ends and substantially level lower ends; an inclined flange member carried between said upper ends of said shank members; attachment means carried by said lower ends of said shank members for engaging said spaced opposed sidewalls for securing said shield and support device to said calculator; and said shank members being of sufficient length to support said flange member above and across said upper surface or below and across said lower surface of said housing for selectively utilizing said device as a light shield to reduce the glare on said lighted display window from oncoming light or as a support to position said calculator in an inclined position; whereby said device may be utilized to effectively enhance the readability of said lighted numbers on the display window.
Claim 11
Dependent Claim 189 words
A light shield/support device for a portable numerical calculator having a housing defined by vertically spaced upper and lower surfaces joined by spaced opposed sidewalls, a plurality of numbered and operational keys carried on said upper surface, a display window located on said upper surface for displaying lighted numbers thereon, said device comprising: a pair of spaced shank members having inclined upper ends and substantially level lower ends; an inclined flange member carried between said upper ends of said shank members; attachment means carried by said lower ends of said shank members for engaging said spaced opposed sidewalls for securing said shield and support device to said calculator; and said shank members being of sufficient length to support said flange member above and across said upper surface or below and across said lower surface of said housing for selectively utilizing said device as a light shield to reduce the glare on said lighted display window from oncoming light or as a support to position said calculator in an inclined position; whereby said device may be utilized to effectively enhance the readability of said lighted numbers on the display window.
Claim 12
Dependent Claim 55 words
The device of claim 9 wherein said attachment means includes a flange formed on a lower end of each of said shank members extending inwardly toward said spaced opposed sidewalls when received thereover; said flanges slideably received in a longitudinal groove formed in said sidewalls so as to be adjustably positionable over the length thereof.

References Cited (Backward Citations)

US3531178A Cited
US3887791A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-06-01 1979-12-01 1980-06-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-06-01 1983-12-01 1984-06-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-06-01 1987-12-01 1988-06-01 $7700.00 Window Closed / Lapsed

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