| 摘要 |
A limited access container that limits the rate at which articles can be withdrawn therefrom includes a retrieval rod which extends through the top cover of the container and which has an article-holding implement on the lower end thereof. After securing an article thereto, the rod is lifted to the top of the container and the article passed through a slotted horizontal passageway to a vertical shaft down which it is lowered to a point adjacent a container opening for removal of the article. A pivotable lever is located adjacent the passageway having a passageway blocking member on one end and a blocking-activating member on the other end. A spring urges the lever to pivot so that the blocking-activating member extends through the slot into the passageway, while movement of an article through the passageways results in contact between the blocking-activating member and the article, allowing the article to pass, but causing the lever to pivot so that the article blocking member enters the slot into the passageway, temporarily preventing the passage of further articles therethrough. A pneumatic dashpot attached to the lever allows the spring to move the blocking member out of the passageway after a predetermined interval of time, resetting the lever mechanism.
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