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Edward Lowton
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Spring-loaded interlock
22 November 2013
The KSP is a spring-loaded version of Castell's K lock, and uses an internal spring to automatically extend the lock’s bolt to its fullest extent when circumstances permit.
The key-operated mechanical interlock is suitable for the safe locking of simple actuating mechanisms.
It is generally used at the start of a process and traps a key while equipment is running. When equipment is switched to a safe state and the aperture in the actuating mechanism is aligned, the spring-loaded bolt automatically extends and is locked in position. This happens immediately and without the need for human intervention.
Once equipment is in the safe state, the key is released and can be used to gain access or start a separate process. The key must be inserted and turned, retracting the bolt, to allow the actuating lever to be moved again.
