Patent US3572071A successfully refreshed from Google Patents.
US3572071A
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US
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Parabolic reflector antennas
Assignee: AT&T Inc
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Filing: 1968-06-07
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Granted: 1971-03-23
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Expires: 1988-06-07
Abstract
Abstract This application discloses a method for making a paraboloidal surface. In particular, such a surface is made by immobilizing the circumference of a circular portion of a thin diaphragm and applying a sufficient uniform pressure to the circular portion to permanently deform it. It has been discovered empirically that the surface thus produced is paraboloidal to a sufficiently high degree of approximation to be useful as a microwave reflector antenna. In addition, refinements in the final shape can be realized by using a plurality of closely spaced blanks in the deformation process.
Inventors
- 👤 Ralph A Semplak
- 👤 Richard H Turrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:28
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/10; B21D22/12; B21D53/00; H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/141; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A method of shaping a diaphragm to form a paraboloidal surface comprising the steps of: spacing apart a plurality of totally overlapping diaphragms such that adjacent diaphragms are free to move relative to each other; immobilizing the circumferences of adjacent circular portions of all of said diaphragms; and applying sufficient fluid pressure to the circular portion of the first of said plurality of diaphragms to cause permanent deformation of the last of said diaphragms.
Claim 2
Independent Claim
74 words
A method of shaping a diaphragm to form a paraboloidal surface comprising the steps of: spacing apart a plurality of totally overlapping diaphragms such that adjacent diaphragms are free to move relative to each other; immobilizing the circumferences of adjacent circular portions of all of said diaphragms; and applying sufficient fluid pressure to the circular portion of the first of said plurality of diaphragms to cause permanent deformation of the last of said diaphragms.
References Cited (Backward Citations)
US1625914A
Cited
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Cited
US3136049A
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US3208255A
Cited
US3200626A
Cited
US3220102A
Cited
US3206963A
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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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |