Radiation source shielding and collimating device

Details Radiation source shielding and collimating device Radiation source shielding and collimating device

1976-09-29

1978-01-17

Dixon, Harold A.

Radiant energy

Radiant energy generation and sources

250497, G21G 400

Patent

active

040694232

ABSTRACT:
Especially for use in agricultural machines such as lettuce harvesters having a maturity tester thereon, there is provided a radiation source such as Americium 241 sealed in a capsule at atmospheric pressure. The capsule is disposed in a plunger movable in an evacuated chamber between a first position in alignment with a passage having a window permeable by radiation to the outside and a second position in which the capsule is out of alignment with the passage. A pressure responsive switch monitors the pressure in the chamber and affords an alarm if the chamber pressure rises.

REFERENCES:
patent: 2891168 (1959-06-01), Goertz et al.
patent: 3123713 (1964-03-01), Maud et al.
patent: 3127515 (1964-03-01), Bernas

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