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US4072840A Expired / Lapsed US ⏱️ 0.0 years remaining

Removable keyboard switch

Assignee: Monroe Systems for Business Inc
•
Filing: 1975-09-19
•
Granted: 1978-02-07
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Expires: 1995-09-19
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Abstract

Abstract A manually actuable keyboard switch is provided having two opposite relieved openings in its base portion so that when it is inserted into an aperture in a keyboard switch retainer having two tabs outwardly extending and depending from opposite sidewalls of the aperture, the tabs spring into their original positions and within said relieved openings to hold said keyboard switch therein.

Inventors

  • 👤 Phillip R. Daigle

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 00:48
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/08

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 209 words
A keyboard assembly comprising: a keyboard switch retainer including a first substantially flat plate having at least one aperture adapted for inserting a keyboard switch therein, said aperture having a generally rectangular configuration and having two opposite walls which are substantially flat and at least two opposite portions of said other walls having angularly depending flexible tabs; a keyboard switch adapted for being seated into said aperture, said switch having a housing assembly having four walls, two of said opposite walls being substantially flat and the other two walls having relieved openings therein; said tabs being deformed to a first position by the edges of said walls having relieved openings therein during seating of said keyboard switch thereby permitting said keyboard switch to be seated into said aperture; said tabs being received by said relieved openings and assuming a second position once said keyboard switch has been seated thereby retaining said keyboard switch in a seated position; said keyboard switch being removable through said aperture by moving said tabs away from said relieved openings thereby freeing said keyboard switch from its seated position; said tabs being movable away from said relieved openings by the insertion of a member through said aperture to deform said tabs to said first position.
Claim 2
Dependent Claim 209 words
A keyboard assembly comprising: a keyboard switch retainer including a first substantially flat plate having at least one aperture adapted for inserting a keyboard switch therein, said aperture having a generally rectangular configuration and having two opposite walls which are substantially flat and at least two opposite portions of said other walls having angularly depending flexible tabs; a keyboard switch adapted for being seated into said aperture, said switch having a housing assembly having four walls, two of said opposite walls being substantially flat and the other two walls having relieved openings therein; said tabs being deformed to a first position by the edges of said walls having relieved openings therein during seating of said keyboard switch thereby permitting said keyboard switch to be seated into said aperture; said tabs being received by said relieved openings and assuming a second position once said keyboard switch has been seated thereby retaining said keyboard switch in a seated position; said keyboard switch being removable through said aperture by moving said tabs away from said relieved openings thereby freeing said keyboard switch from its seated position; said tabs being movable away from said relieved openings by the insertion of a member through said aperture to deform said tabs to said first position.
Claim 3
Dependent Claim 26 words
A keyboard assembly as set forth in claim 1, wherein: said tabs assume said second position whenever a keyboard switch is not in a seated position.
Claim 4
Dependent Claim 37 words
A keyboard assembly as set forth in claim 1, further including: a second substantially flat plate spaced from and parallel to said first plate; said keyboard switch resting against said flat plate when said switch is seated.
Claim 5
Dependent Claim 30 words
A keyboard assembly as set forth in claim 1, wherein: said relieved openings each comprise a back wall portion spaced from a parallel to the surface of its respective wall.
Claim 6
Dependent Claim 23 words
A keyboard assembly as set forth in claim 4, wherein: each of said relieved opening back wall portions include a pair of slots.

References Cited (Backward Citations)

US2874254A Cited
US2938188A Cited
US3084962A Cited
US3469051A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-02-06 1981-08-08 1982-02-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-02-06 1985-08-08 1986-02-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-02-06 1989-08-08 1990-02-07 $7700.00 Window Closed / Lapsed

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