Patent US3947984A successfully refreshed from Google Patents.
US3947984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for display elements
Assignee: Dayco Products Canada Inc
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Filing: 1975-05-07
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Granted: 1976-04-06
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Expires: 1995-05-07
Abstract
Abstract A display or indicating device has an array of display elements rotatably mounted on one side of a board and electrically controlled means for actuating them, where the board is of the type on which printed circuits are mounted.
Inventors
- 👤 Donald Winrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:58
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/37; G09F9/375; H; H05; H05K; H05K1/00; H05K1/18; H05K1/189
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
In a display or indicating device, having an array of display elements rotatably mounted on one side of a resilient flexible board of the type to bear printed circuits thereon and having such a printed circuit on the side remote from the array each said rotatably mounted element being provided with opposite contrastingly coloured surfaces, a magnet mounted on each said rotatably mounted member for rotation therewith and means mounted on said display board corresponding to each element for providing responsive to electrical energization a magnetic field which controls the orientation of said magnet and said element, wherein said circuit is utilized to control said electrical energization; means for biasing said board into a concave shape facing the side on which the array is mounted.
Claim 2
Dependent Claim
125 words
In a display or indicating device, having an array of display elements rotatably mounted on one side of a resilient flexible board of the type to bear printed circuits thereon and having such a printed circuit on the side remote from the array each said rotatably mounted element being provided with opposite contrastingly coloured surfaces, a magnet mounted on each said rotatably mounted member for rotation therewith and means mounted on said display board corresponding to each element for providing responsive to electrical energization a magnetic field which controls the orientation of said magnet and said element, wherein said circuit is utilized to control said electrical energization; means for biasing said board into a concave shape facing the side on which the array is mounted.
Claim 3
Dependent Claim
25 words
In a display as claimed in claim 1 wherein the side of the display board facing the array is darker than the opposite side. side.
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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |