Radiation limiting means

Details Radiation limiting means Radiation limiting means

1974-07-11

1976-03-30

Smith, Alfred E.

Radiant energy

Radiation controlling means

Shields

250511, G03B 4116

Patent

active

039476901

ABSTRACT:
A radiation limiting shutter device including a hollow, frusto-pyramidal structure having relatively movable walls made of radiation absorbent material and defining an entrance aperture of a desired size, each of the walls comprising a frusto-triangular plate having serrated sloped edges which intermesh with similar sloped edges of respective adjacent plates forming the structure.

REFERENCES:
patent: 1738945 (1929-12-01), Brenbert
patent: 1909118 (1933-05-01), Raab
patent: 3023314 (1962-02-01), Hura
patent: 3163762 (1964-12-01), Peyser
patent: 3304427 (1967-02-01), Peyser
patent: 3448270 (1969-06-01), Peyser
patent: 3609370 (1971-09-01), Peyser
patent: 3829701 (1974-08-01), Hura

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