Patent US4773780A successfully refreshed from Google Patents.
US4773780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyboard with a metal carrier plate
Assignee: Preh GmbH
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Filing: 1986-10-24
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Granted: 1988-09-27
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Expires: 2006-10-24
Abstract
Abstract A keyboard with a metal carrier plate and a guide frame for keys to be athed thereto. The guide frame has a base part which is provided with legs. The legs of the guide frame are inserted into openings in the carrier plate. To secure the guide frame to the carrier plate, each opening has a recess starting at the lower edge of the carrier plate and which terminates at a bracket which is formed as part of the carrier plate. The legs are provided with foot parts which slide into the recess located beneath the respective bracket, causing a peg to snap into another opening in the carrier plate. In such a manner, the guide frame is secured to the carrier plate.
Inventors
- 👤 Gerhard Hochgesang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:22
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H02; H02B; H02B1/00; H02B1/015; H02B1/04; H02B1/044; H01H2221/00; H01H2221/024; H01H2221/026
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
189 words
A keyboard for attaching any number of keys thereto comprising a metal carrier plate having at least one opening for each key to be attached and a guide frame for each key to be attached, each said guide frame having a leg, wherein said leg is retained in said opening and said carrier plate corresponding to said leg, characterized in that each said leg further comprises a foot part and each said openings provided with a recess and a bracket, said recess and said bracket formed along the same vertical axis, said recess extending from the lower edge of said carrier plate and terminating in said bracket, such that said leg engages said opening and said foot part of said leg slides beneath said bracket to attach said guide frame to said carrier plate, each said guide frame further comprising a peg and a spring elastic strap, said peg formed onto said spring elastic strap, and said carrier plate is further provided with a corresponding securing opening for each said guide frame, wherein said peg engages said corresponding securing opening to secure said guide frame to said carrier plate.
Claim 2
Dependent Claim
189 words
A keyboard for attaching any number of keys thereto comprising a metal carrier plate having at least one opening for each key to be attached and a guide frame for each key to be attached, each said guide frame having a leg, wherein said leg is retained in said opening and said carrier plate corresponding to said leg, characterized in that each said leg further comprises a foot part and each said openings provided with a recess and a bracket, said recess and said bracket formed along the same vertical axis, said recess extending from the lower edge of said carrier plate and terminating in said bracket, such that said leg engages said opening and said foot part of said leg slides beneath said bracket to attach said guide frame to said carrier plate, each said guide frame further comprising a peg and a spring elastic strap, said peg formed onto said spring elastic strap, and said carrier plate is further provided with a corresponding securing opening for each said guide frame, wherein said peg engages said corresponding securing opening to secure said guide frame to said carrier plate.
Claim 3
Dependent Claim
30 words
A keyboard according to claim 1 characterized in that said peg and said spring elastic strap releasably position said guide frame for securing said guide frame to said carrier plate.
Claim 4
Dependent Claim
127 words
A guide frame for a key to be removably attached to a carrier plate to form a keyboard comprising: a sleeve; a base part having a first and a second corner oppositely orientated, said base part attached to said sleeve; a first leg attached to said first corner of said base part; a second leg attached to said second corner of said base part such that said first and second legs are oppositely orientated on said base part; a first foot attached to said first leg; a second foot attached to said second leg, said first foot and said second foot oppositely orientated; a peg attached to a third corner of said base; and a spring elastic strap, said peg being formed on said spring elastic strap.
Claim 5
Dependent Claim
127 words
A guide frame for a key to be removably attached to a carrier plate to form a keyboard comprising: a sleeve; a base part having a first and a second corner oppositely orientated, said base part attached to said sleeve; a first leg attached to said first corner of said base part; a second leg attached to said second corner of said base part such that said first and second legs are oppositely orientated on said base part; a first foot attached to said first leg; a second foot attached to said second leg, said first foot and said second foot oppositely orientated; a peg attached to a third corner of said base; and a spring elastic strap, said peg being formed on said spring elastic strap.
Claim 6
Dependent Claim
28 words
The guide frame of claim 3 wherein said peg and said spring elastic strap releasably position said guide frame for securing said guide frame to said carrier plate.
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) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |