Patent US3788267A successfully refreshed from Google Patents.
Patent US3781095A successfully refreshed from Google Patents.
US3781095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflector
Assignee: Westinghouse Electric Corp
•
Filing: 1969-12-08
•
Granted: 1973-12-25
•
Expires: 1989-12-08
Abstract
Abstract Described is an improvement in a thin membranous reflector having a continuous array of inwardly bending support cable means around its perimeter for stretched-flat tension-spring support at discrete outwardly extending apex locations of such array. The improvement resides in imparting a creep characteristic to such cable means which matches that of the reflector membrane while subjected to the flatness-inducing tensioning thereof, in behalf of assuring preservation of a stretched-flat state of such membrane for a prolonged period of time.
Inventors
- 👤 F Rushing
- 👤 L Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:08
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/18; G02B7/182; F; F24; F24S; F24S23/00; F24S23/70; F24S23/81; Y; Y02; Y02E; Y02E10/00; Y02E10/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
An improved reflector comprising, a flexible reflector membrane of visco-elastic material having a continuous series of concave edge regions defining its perimeter which intersect at spaced-apart apices as primary support regions for accepting radial tension forces, and edge support cable means attached to said membrane about its perimeter coextensively with its concave edge regions to transmit such radial tension forces at the apices into biaxial tensioning of such membrane, wherein the improvement resides in making said edge support cable means also of a visco-elastic material and of such proportions as to experience the same degree of creep as that of said membrane under sustained application of said radial tension forces.
Claim 2
Dependent Claim
110 words
An improved reflector comprising, a flexible reflector membrane of visco-elastic material having a continuous series of concave edge regions defining its perimeter which intersect at spaced-apart apices as primary support regions for accepting radial tension forces, and edge support cable means attached to said membrane about its perimeter coextensively with its concave edge regions to transmit such radial tension forces at the apices into biaxial tensioning of such membrane, wherein the improvement resides in making said edge support cable means also of a visco-elastic material and of such proportions as to experience the same degree of creep as that of said membrane under sustained application of said radial tension forces.
Claim 3
Dependent Claim
24 words
The reflector of claim 1, wherein said visco-elastic material of which said cable means is made is the same as that of said membrane.
Claim 4
Dependent Claim
54 words
The reflector of claim 1, further comprising, second cable means of non visco-elastic material arranged parallel to said first Cable means, support means slidable along said second cable means affixed to said visco-elastic cable means, and constant-tension spring means connecting ends of respective sections of said second cable means to said primary support regions.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |