Patent US5212356A successfully refreshed from Google Patents.
US5212356A
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US
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Computer keyboard with flexible dome switch layer
Assignee: Key Tronic Corp
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Filing: 1992-08-14
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Granted: 1993-05-18
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Expires: 2012-08-14
Abstract
Abstract As a preferred embodiment, a computer keyboard dome sheet is illustrated in the figures showing a extruded sheet 30 with an elongated body 32 with parallel extruded ridges 44 corresponding to the keyboard rows 16a-16f. Apertures or cutouts are formed in the ridges 46 at desired intervals between the key positions to form individual ridge domes 48 having parallel front and rear walls 54 and 56 that are collapsible to bring a switch actuating keel 66, 92 into engagement with the switch structure to actuate an electrical switch to indicate that the key switch has been depressed.
Inventors
- 👤 George English
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:06
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/702; H01H2221/00; H01H2221/002; H01H2221/056; H01H2221/074; H01H2229/00; H01H2229/022; H01H2229/044; H01H2233/00; H01H2233/002; H01H2233/004
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
In a computer keyboard having key switches positioned at spaced key locations in a preselected array having a plurality of parallel key rows, a flexible dome sheet; said flexible dome sheet being extruded with a base and a plurality of parallel dome ridges extending upward from the base corresponding to the key rows; said extruded dome sheet having a plurality of apertures formed in the dome ridges at selected locations along the ridges defining individual ridge domes between the apertures at spaced locations corresponding to the spaced key locations.
Claim 2
Dependent Claim
89 words
In a computer keyboard having key switches positioned at spaced key locations in a preselected array having a plurality of parallel key rows, a flexible dome sheet; said flexible dome sheet being extruded with a base and a plurality of parallel dome ridges extending upward from the base corresponding to the key rows; said extruded dome sheet having a plurality of apertures formed in the dome ridges at selected locations along the ridges defining individual ridge domes between the apertures at spaced locations corresponding to the spaced key locations.
Claim 3
Dependent Claim
35 words
In the computer keyboard as defined in claim 1 wherein each of the individual ridge domes have resilient opposing side walls extending upward from the base that are collapsible upon depression of a corresponding key.
Claim 4
Dependent Claim
40 words
In the computer keyboard as defined in claim 1 wherein each of the individual ridge domes have a bridging crown interconnecting the side walls and overlying a corresponding keyswitch for actuating the corresponding keyswitch upon depression of the corresponding key.
Claim 5
Dependent Claim
24 words
In the computer keyboard as defined in claim 1 wherein the opposing side walls of each individual ridge dome are parallel with each other.
Claim 6
Dependent Claim
27 words
In the computer keyboard as defined in claim 1 wherein the side walls of each individual ridge dome of a ridge are linearly aligned with each other.
Claim 7
Dependent Claim
19 words
In the computer keyboard as defined in claim 1 wherein the side walls are inclined inward toward each other.
Claim 8
Dependent Claim
31 words
In the computer keyboard as defined in claim 1 wherein the bridging crown has a bottom surface with an elongated actuation keel for actuating the keyswitch when the key is depressed.
Claim 9
Dependent Claim
20 words
In the computer keyboard as defined in claim 1 wherein the actuation keel is formed of an electrically conductive material.
Claim 10
Dependent Claim
20 words
In the computer keyboard as defined in claim 1 wherein the actuation keel is formed parallel with the side walls.
Claim 11
Dependent Claim
37 words
In the computer keyboard as defined in claim 1 wherein the bridging crown has a top surface with an elongated groove formed therein to facilitate collapse of the individual ridge dome upon depression of the corresponding key.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-17 | 1996-11-16 | 1997-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-17 | 2000-11-16 | 2001-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-17 | 2004-11-16 | 2005-05-18 | $7700.00 | Window Closed / Lapsed |