Patent US4127758A successfully refreshed from Google Patents.
US4127758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tactile layer having hinged dome
Assignee: Sheldahl Inc
•
Filing: 1977-10-13
•
Granted: 1978-11-28
•
Expires: 1997-10-13
Abstract
Abstract A tactile layer for use in combination with diaphragm-type switch keyboards to impact a tactile signal to the user upon depression of a key. The tactile layer comprises a sheet of Mylar polyester material having integrally formed deformations therein wherein the deformation is in the form of an annular ring hingedly supporting a dome shaped projection about a generally circular transition line, the transition line being displaced a first predetermined distance from the plane of the sheet which is less than the distance which the top of the dome shaped projection is displaced from the plane of the sheet.
Inventors
- 👤 Blaine G. Lowthorp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:37
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/702; H01H13/703; H01H2211/00; H01H2211/026; H01H2211/028; H01H2215/00; H01H2215/004; H01H2215/026; H01H2215/028; H01H2227/00; H01H2227/022
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
66 words
An article of manufacture comprising: (a) a sheet of flexible material of substantially constant thickness having first and second surfaces and having at least one integrally formed deformation extending inwardly from said first surface and outwardly from said second surface thereof, said deformation being in the form of an annular ring portion completely surrounding a circular convex dome shaped projection and extending upwardly and outwardly therefrom.
Claim 2
Dependent Claim
66 words
An article of manufacture comprising: (a) a sheet of flexible material of substantially constant thickness having first and second surfaces and having at least one integrally formed deformation extending inwardly from said first surface and outwardly from said second surface thereof, said deformation being in the form of an annular ring portion completely surrounding a circular convex dome shaped projection and extending upwardly and outwardly therefrom.
Claim 3
Dependent Claim
24 words
The article as in claim 1 wherein said material is prestabilized polyester plastic and wherein the thickness of said sheet is about 5 mils.
Claim 4
Dependent Claim
29 words
The article as in claim 1 and further including an electrically conductive material disposed on said first surface in the area of the center of said dome shaped projection.
Claim 5
Dependent Claim
34 words
The article as in claim 1 wherein the intersection of said annular ring portion and said circular dome shaped projection is displaced a predetermined distance from the plane of said sheet surrounding said deformation.
Claim 6
Dependent Claim
30 words
The article as in claim 4 wherein the furthest displacement of said annular ring portion from the plane of said sheet surrounding said deformation is greater than said predetermined distance.
References Cited (Backward Citations)
SE24881C1
Cited
US1958050A
Cited
DE1817569U
Cited
US3503031A
Cited
US3760137A
Cited
CH545991A
Cited
US3829646A
Cited
US3898421A
Cited
US3860771A
Cited
FR2284177A1
Cited
US3971902A
Cited
US4034176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |