
These initiators are mechanically actuated firing devices designed to function, by gas pressure, another pressure actuated device such as a catapult, remover, thruster, initiator, or lap belt release, to which it is connected by a length of flexible or steel tube.
No information about functioning.
Nothing else to see.
TM 9-1385-51, Ammunition (Conventional) for Explosive Ordnance Disposal (1967)