Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1988-02-08
1989-08-29
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
313526, H01J 4014
Patent
active
048619779
ABSTRACT:
The housing of an elongated proximity-focus image intensifier comprises at least two elongated parts. The parts have in cross-section such dimensions and such a configuration that the housing is self-supporting. An exemplary embodiment of such a housing which is essentially rectangular in cross-section has a front wall, a rear wall and two side walls, all having an essentially rectangular cross-section. In the case of at least two pairs of adjacent walls the edge in the longitudinal direction of the surface, facing the interior of the housing, of a first of the pair of walls is provided with profiling in the form of a recessed section in which the longitudinal edge of the adjacent tube wall is received.
REFERENCES:
patent: 3894258 (1975-07-01), Butterwick
patent: 4178528 (1979-12-01), Kennedy
patent: 4254437 (1981-03-01), Funk et al.
Allen Stephone B.
B.V. Optische Industrie "De Oude Delft"
Marn Louis E.
Nelms David C.
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