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US4303858: Device to be used in automatic gamma counters to move the samples into a measuring chamber
3 Claims, No Drawings
A device to be used in an automatic gamma counter to move sample holders (4) into a measuring chamber (6). The device comprises a slide (1) which moves the holders into the measuring chamber (6) and at the entering completely seals the chamber.
- 1. In an automatic gamma counter for measuring radioactive samples contained in sample holders removably supported in elongated racks which are moved step-by-step in a longitudinally directional path past a measuring station comprising:a radiation shielded chamber disposed at said station on one side of said path, said chamber having an opening facing a sample holder positioned at said station through which sample holders are to be sequentially introduced into the chamber for measuring;a slide fabricated of radiation shielding material mounted at said station on the opposite side of said path and facing said opening for horizontal reciprocating movement perpendicular to said path between a retracted position on the side of the path opposite from said opening and a projected position in engagement with said opening;said slide having a configuration to engage with said opening in said projected position to provide a radiation shielded closure for said chamber; andtransferring and gripping means for removing a sample holder from a rack at said station when the slide is in said retracted position and for suspending the removed holder in said shielded chamber when in said projected position.
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