US3745563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for preserving the free rotatability of the individual vanes in composite display devices
Assignee: Display Technology Corp
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Filing: 1972-01-10
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Granted: 1973-07-10
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Expires: 1992-01-10
Abstract
Abstract In composite display devices of the rotatable vane type wherein rows of juxtaposed vanes are rotatably supported upon common horizontally disposed axles and are selectively turned on said axles under the influence of electrostatic fields, coacting guide means are provided on the vanes and the support structure for the axles, for confining each vane during its performance to its predetermined position axially of its axle. Thus, displacement and lateral contact of adjacent vanes on the axles with resultant impairment of their free individual rotatability is prevented without need to use spacer beads between them.
Inventors
- 👤 C Jones
- 👤 W Aiken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:32
CPC Classifications
G; G08; G08B; G08B5/00; G08B5/22; G09; G09F; G09F9/00; G09F9/30; G09F9/37; G09F9/372
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
tIn a display device of the type controlled by electrostatic fields the improvement comprising a support structure, a plurality of coplanar parallel axles held in said support structure, a plurality of vanes rotatably supported side by side from each of said axles, electrostatic electrode means for turning said vanes individually on said axles, and coacting guide means on both said support structure and each of said vanes in centeral areas thereof for confining said vanes individually to predetermined positions axially of said axles.
Claim 2
Dependent Claim
83 words
tIn a display device of the type controlled by electrostatic fields the improvement comprising a support structure, a plurality of coplanar parallel axles held in said support structure, a plurality of vanes rotatably supported side by side from each of said axles, electrostatic electrode means for turning said vanes individually on said axles, and coacting guide means on both said support structure and each of said vanes in centeral areas thereof for confining said vanes individually to predetermined positions axially of said axles.
Claim 3
Dependent Claim
51 words
A display device according to claim 1 wherein said coacting guide means comprises a slot within a central area of each of said vanes having side edges lying in axially spaced planes normal to the axle for the vane and a projection of said support structure slidably engaged in said slot.
Claim 4
Dependent Claim
28 words
A display device according to claim 2 wherein the end of said projection protrudes through said slot and said axle is supported in the outwardly projecting end thereof.
Claim 5
Dependent Claim
42 words
A display device according to claim 1 wherein said co-acting guide means comprise axially spaced lugs projecting from a central area of a surface of said vane and a projection of said support structure slidably engaged in the space between said lugs.
Claim 6
Dependent Claim
42 words
A display device according to claim 4 wherein said axle is supported in said projection near the end thereof and the end edge of said end is semicircular with the center of its circle substantially coincident with the axis of said axle.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |