guard lock


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guard lock

[′gärd ‚läk]
(civil engineering)
(engineering)
An auxiliary lock that must be opened before the key can be turned in a main lock.
References in periodicals archive ?
The G9SX-SM monitors the motor's movement by its back electromotive force (BEMF), and outputs a signal to unlock the Guard Lock Safety Door Switch as soon as it determines that the motor has stopped moving.
Carefully reduce the height of these surfaces until the trigger guard locks with firm hand pressure.
In prison the guard locks and unlocks all the doors for you, but at work you must often carry a security card and open all the doors for yourself.
CLOSING: A security guard locks the factory gates, right; and above, the BPI factory in Stockton Picture by IAN COOPER
INVITES ONLY: A security guard locks the gates of Stormont.
The clear safety guard locks temporarily, protecting healthcare workers while transporting the syringe to the patient location.
A security guard locks up for the last time at the Dome last night
The range includes key switch interlocks, key exchange units, access guard locks, timer delay units and solenoid control devices.
It has duel trigger guard locks to help deter gun grabs, yet it allows for rapid draw.
Limited Tenders are invited for 1)Safety Switches With Guard Locking And Guard Lock Monitoring.
The Insta Guard locks are rubber lined to protect the firearms.
The inspection work includes, but is not limited to the following structures; locks, dams, guard gates, guard locks, retaining walls, culverts and spillways.