Patent US4392037A successfully refreshed from Google Patents.
US4392037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized button for an electrical keyboard
Assignee: Unisys Corp
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Filing: 1981-06-04
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Granted: 1983-07-05
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Expires: 2001-06-04
Abstract
Abstract A large area button in an electrical keyboard is prevented from jamming by being stabilized against tilt which results from depressive forces being applied remotely from the center of the button, the stabilization being achieved by the provision of two anti-roll bars attaching the button to the body of the keyboard and each preventing deviation of one of two axes of the button from being orthogonal both to one another and to the direction of depression of the button.
Inventors
- 👤 Anthony Fleming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:22
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/02; H01H3/12; H01H3/122
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A keyboard with depressable keys mounted on a base, the keyboard having apparatus for stabilizing the movement of the keys along the axes orthogonal to the direction of depression of the keys comprising: one or more rigid members, each said member movably secured at multiple points to said key and movably secured at multiple points to said base, said multiple securing points for said key and said base being along lines maintaining a parallel relation with one of said axis orthogonal to the direction of key depression, said secured rigid members stabilizing movement of said keys along the axes.
Claim 2
Dependent Claim
99 words
A keyboard with depressable keys mounted on a base, the keyboard having apparatus for stabilizing the movement of the keys along the axes orthogonal to the direction of depression of the keys comprising: one or more rigid members, each said member movably secured at multiple points to said key and movably secured at multiple points to said base, said multiple securing points for said key and said base being along lines maintaining a parallel relation with one of said axis orthogonal to the direction of key depression, said secured rigid members stabilizing movement of said keys along the axes.
Claim 3
Dependent Claim
16 words
The apparatus of claim 1 having multiple rigid members stabilizing movement along axes which are non-parallel.
Claim 4
Dependent Claim
42 words
The apparatus of claim 2 in which said rigid member is pivotably secured to said key so as to maintain a parallel relation between the line of multiple securing points of said rigid member on said key and one of said axis.
Claim 5
Dependent Claim
42 words
The apparatus of claim 3 in which said rigid member is slidably secured to said base so as to maintain a parallel relation between the line of multiple securing points of said rigid member on said base and one of said axis.
Claim 6
Dependent Claim
17 words
The apparatus of claim 4 in which said rigid member is a frame defining a planar figure.
Claim 7
Dependent Claim
12 words
The apparatus of claim 5 in which said frame is a wire.
Claim 8
Dependent Claim
46 words
The apparatus of claim 6 in which said rigid member is secured to said base by one or more tabs placing one side of said rigid wire member against said base to make sliding contact therewith, the contact line being parallel with one of said axis.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |