← Back to Patent Explorer
US3949504A Expired / Lapsed US ⏱️ 0.0 years remaining

Lighted display for a console

Assignee: Nortel Networks Ltd
•
Filing: 1974-10-09
•
Granted: 1976-04-13
•
Expires: 1994-10-09
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A lighted display for a console, particularly for a telephone console for private branch exchanges, comprises a sandwich structure of a front transparent cover of a dark coloured material, an indicator layer or sheet of dark non-transparent material having transparent characters thereon and a plurality of lamps mounted in holders behind the indicator sheet, a lamp aligned with each character. When assembled an apparently completely dark blank display is presented, but on lighting of a lamp a clear distinct indication appears. Indication characters can be in vertical columns, and there is no need to stagger characters as occurs with conventional displays with "edge-lit" characters.

Inventors

  • 👤 Wesley Nelson Willis
  • 👤 Graham Stirling Laing

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 18:24
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/04; G09F13/08; G09F13/0418; G09F13/0427; G09F13/0409

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 314 words
A console for a telecommunications unit including a housing base and a housing top, said base and top cooperating to form an enclosure for telecommunications apparatus, said housing top including a forward part having an upwardly facing surface with at least one aperture therein for the mounting of apparatus items, and a rear part having an upwardly extending portion, the upwardly extending portion having a forwardly facing surface with an aperture therein extending for the major part of the forwardly facing surface and having top and bottom edges; and a lighted display positioned in said aperture of said forwardly facing surface and extending into said upwardly extending portion, said lighted display comprising; a front cover of dark colored translucent material positioned in said aperture in said forwardly facing surface said front cover having a planar front surface and top and bottom flanges; a light indicator assembly mounted behind said front cover, said light indicator assembly including at least one lampholder unit mounted in said upwardly extending portion and having a plurality of lamps therein; an indicator sheet of dark opaque material having a plurality of transparent indicator characters thereon spaced in a predetermined pattern with a character in front of each lamp; and an apertured plate releasably attached to said lamp unit and including a plurality of apertures therein, an aperture aligned with each lamp, the indicator sheet portioned between said plate and said lampholder unit and held in close contact with said lampholder unit by said plate, the indicator sheet also positioned in close proximity to said planar front surface of said front cover; and interengaging formations on said top and bottom edges of said aperture in said forwardly facing surface and on said top and bottom flanges of said front cover, said interengaging formations releasably attaching said front cover to said forwardly facing surface with said front cover positioned in said aperture.
Claim 2
Dependent Claim 314 words
A console for a telecommunications unit including a housing base and a housing top, said base and top cooperating to form an enclosure for telecommunications apparatus, said housing top including a forward part having an upwardly facing surface with at least one aperture therein for the mounting of apparatus items, and a rear part having an upwardly extending portion, the upwardly extending portion having a forwardly facing surface with an aperture therein extending for the major part of the forwardly facing surface and having top and bottom edges; and a lighted display positioned in said aperture of said forwardly facing surface and extending into said upwardly extending portion, said lighted display comprising; a front cover of dark colored translucent material positioned in said aperture in said forwardly facing surface said front cover having a planar front surface and top and bottom flanges; a light indicator assembly mounted behind said front cover, said light indicator assembly including at least one lampholder unit mounted in said upwardly extending portion and having a plurality of lamps therein; an indicator sheet of dark opaque material having a plurality of transparent indicator characters thereon spaced in a predetermined pattern with a character in front of each lamp; and an apertured plate releasably attached to said lamp unit and including a plurality of apertures therein, an aperture aligned with each lamp, the indicator sheet portioned between said plate and said lampholder unit and held in close contact with said lampholder unit by said plate, the indicator sheet also positioned in close proximity to said planar front surface of said front cover; and interengaging formations on said top and bottom edges of said aperture in said forwardly facing surface and on said top and bottom flanges of said front cover, said interengaging formations releasably attaching said front cover to said forwardly facing surface with said front cover positioned in said aperture.
Claim 3
Dependent Claim 23 words
A display as claimed in claim 1, including a translucent sheet of coloured material positioned between said perforated plate and said indicator sheet.
Claim 4
Dependent Claim 23 words
A display as claimed in claim 1, including a translucent sheet of coloured material positioned between said indicator sheet and said lamp unit.

References Cited (Backward Citations)

US1745623A Cited
US1888584A Cited
US2931027A Cited
US2931108A Cited
US3010235A Cited
US3163949A Cited
US3584401A Cited
US3707792A Cited
US3768188A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-04-13 1979-10-13 1980-04-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-04-13 1983-10-13 1984-04-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-04-13 1987-10-13 1988-04-13 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag