Hammer break

Ham´mer break

1.(Elec.) An interrupter in which contact is broken by the movement of an automatically vibrating hammer between a contact piece and an electromagnet, or of a rapidly moving piece mechanically driven.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
If the hammer is cocked in the field and the rifle not fired, it can be lowered by holding back on its spur with a thumb while pulling the trigger, then just as you feel the hammer break free from the sear, remove your finger from the trigger while continuing to ease the hammer forward.
A built-on BTI hydraulic hammer breaks up oversize incoming materials.
Or, Hesseltine says, some models will reduce the force if there's no resistance, like when a breaker or hammer breaks through the wall it's demolishing.
In an eight-hour shift, the hammer breaks out 240-300 t of rock, which has a compressive strength of 80-120 Mpa.