Inside gauge of the type having moving arms and direct contact feelers used to check the sizes of mechanical workpieces during their machining on machine tools

摘要

An interior gauge having movable arms and direct contact feelers to which is attached a mechanical protection device comprising a protection plate of very hard and impact resistant material attached to a grooved support forming a part of two lateral protection elements symmetrical with respect to the longitudinal axis of the device. The grooves of the support house the ends of the arms and are flat but inclined with respect to the longitudinal axis of the device with their heights decreasing in the direction of the flow of cooling fluid passing therethrough. The two lateral protection elements taper towards the support and define openings therein to permit access to the movable arms for mechanical adjustment.