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This is a trapped-key interlock on the door of an electrical switchgear cabinet. It is attached with one-way security screws to discourage casual removal, which would defeat the interlock scheme. Trapped-key interlocking utilizes locks and keys for sequential control of equipment and machinery to ensure safe operation. Trapped-key interlocks ...
Products included trunk and cabinet locks, as well as high quality security-grade padlocks, and, in the early twentieth century, screw-machine products. The company experienced precipitous growth with the onset of the First World War , and even greater expansion during the Second World War , nearly doubling the number of employees to 800.
In March 1844, Philip Corbin began working for the Matteson, Russell & Erwin Company (later Russell & Erwin). In the fall of 1844, Corbin worked for Henry Andrews, who had secured a contract to make locks for North & Stanley. At the Henry Andrews Company, Corbin apprenticed and learned the art of lock making.
Three-point locking, or a multipoint lock, is a locking system installed in cabinet or locker doors to enable more secure locking. Whereas in single-point locking , the door on a cabinet locks only at the point where the key is turned, halfway up the edge of the door, three-point locking enables the top and bottom of the door to be ...
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VingCard Elsafe, whose origin was in Moss, Norway, is an international producer of hotel locking systems, electronic in-room safes and energy management systems.After inventing the first mechanical hole card operated lock in 1976, VingCard was acquired in 1994 by ASSA ABLOY, and merged with the electronic safe producer Elsafe [2] to form VingCard Elsafe in 2006.
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