Electric actuated impact testing machine

Claim 1

AN IMPACT TESTING MACHINE COMPRISING A BASE, A STATIONARY SUPPORTING AREA ON THE BASE, A CARRIAGE HAVING A SUPPORTING AREA THEREON CORRESPONDING TO AND MOVABLE RELATIVE TO SAID STATIONARY SUPPORTING AREA, SAID CARRIAGE HAVING A RECIPROCATING PATH OF MOVEMENT RELATIVE TO SAID BASE, A STATIONARY IMPACT BLOCK ON SAID BASE IN SAID PATH OF MOVEMENT, A MOVABLE IMPACT BLOCK ON THE CARRIAGE FACING SAID STATIONARY IMPACT BLOCK AND AN ELECTRIC MOTOR FOR DRIVING SAID CARRIAGE FROM AN INITIAL POSITION TO A POSITION OF ENGAGEMENT AGAINST SAID STATIONARY IMPACT BLOCK AND COMPRISING MUTUALLY MOVABLE MOTOR ELEMENTS, ONE OF SAID MOTOR ELEMENTS COMPRISING A COIL OF WIRE ADAPTED TO BE CONNECTED TO A SOURCE OF D.C. ELECTRIC ENERGY AND FORMING AN ARMATURE, THE OTHER OF SAID MOTOR ELEMENTS COMPRISING A MAGNETIC YOKE FORMING A STATOR MOUNTED IN OPERATIVE RELATIONSHIP WITH SAID COIL, THE MOTOR ELEMENT ON THE CARRIAGE BEING SUBJECT TO MOVEMENT UPON ENERGIZATION OF THE COIL WHEREBY TO DRIVE SAID CARRIAGE ALONG SAID PATH OF MOVEMENT UNTIL IMPACT TAKES PLACE AND RETURN MEANS ON SAID BASE ACTING AGAINST SAID CARRIAGE TO RETURN SAID CARRIAGE TO SAID INITIAL POSITION, SAID RETURN MEANS COMPRISING A GAS PRESSURE PASSAGE IN THE BASE HAVING GAS UNDER PRESSURE THEREIN DIRECTED ENDWISE AGAINST SAID CARRIAGE.