Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1986-11-13
1988-05-17
Henry, Jon W.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
350613, 343840, 343915, G02B 510, G02B 718
Patent
active
047446447
ABSTRACT:
A membrane concentrator mirror comprises a rigid, circular-segment-shaped frame-like basic body with a hermetically closed bottom wall, the basic body having a union device for connection with a conduit leading to a device for generating sub-pressure, a membrane being hermetically stretched over the basic body in such a way that it is deformable under the influence of a sub-pressure, and this membrane consisting of a plurality of membrane segments the outer end of which is limited in a circular segment shape, the membrane segments being connected with one another along radially extending rims. An improvement of the optical quality and a reliable connection of different membrane sections is to be achieved. To this effect the membrane segments are connected with one another in such a way that rigid, radially extending clamping profiles secure the radially extending outer rims by means of clamping devices.
REFERENCES:
patent: 3056131 (1962-09-01), McCreary
patent: 3552835 (1971-01-01), Benzies
patent: 3623796 (1971-11-01), Schweiger
patent: 4033676 (1977-07-01), Brantley et al.
Kleinwachter Hans
Kleinwachter Jurgen
Henry Jon W.
Kleinwachter Jurgen
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