Door interlock security device
First Claim
Patent Images
1. A security device comprising:
- a frame for defining a chamber;
first and second doors mounted to said frame adjacent openings into said chamber for movement between closed positions, in which they cover said openings, and open positions, in which they do not cover said openings; and
a rigid rocker arm having first and second opposite extremities located adjacent to edges of corresponding first and second doors, said rigid rocker arm being mounted to said frame for rocking movement between a first-door blocking position and a second-door blocking position, each of said first and second extremities of said rocker arm including a latch means for alternately occupying a blocking position blocking the movement of said corresponding door from said closed to said open position and a non-blocking position allowing said corresponding door to move from said closed to said open position, said latch means moving between said blocking and unblocking positions when said rocker arm rocks, and for engaging an edge of said corresponding door when said corresponding door is in an open position to prevent the rocker arm from rocking.
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Abstract
A transfer-chamber two-door interlock security device includes a rocker arm which can be rocked between first and second door locking positions. If the rocker arm is in a first-door locking position and the second door is opened, a latch flange on the rocker arm engages an edge of the open door to thereby prevent the rocker arm from rocking.
12 Citations
11 Claims
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1. A security device comprising:
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a frame for defining a chamber; first and second doors mounted to said frame adjacent openings into said chamber for movement between closed positions, in which they cover said openings, and open positions, in which they do not cover said openings; and a rigid rocker arm having first and second opposite extremities located adjacent to edges of corresponding first and second doors, said rigid rocker arm being mounted to said frame for rocking movement between a first-door blocking position and a second-door blocking position, each of said first and second extremities of said rocker arm including a latch means for alternately occupying a blocking position blocking the movement of said corresponding door from said closed to said open position and a non-blocking position allowing said corresponding door to move from said closed to said open position, said latch means moving between said blocking and unblocking positions when said rocker arm rocks, and for engaging an edge of said corresponding door when said corresponding door is in an open position to prevent the rocker arm from rocking. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification