Torque wrench

Claim 1

A TORQUE WRENCH COMPRISING: A BODY MEMBER; A FLEXURE BAR MOUNTED IN AND PROJECTING FORWARDLY FROM SAID BODY MEMBER; A HEAD ON THE FORWARD EXTREMITY OF SAID BAR; MEANS FOR CONNECTING SAID HEAD TO A WORK ELEMENT FOR ROTATION OF THE LATTER; A HOUSING FIXEDLY SURROUNDING THE FORWARD PORTION OF SAID BODY MEMBER, THE REAR PORTION OF SAID BODY MEMBER PROJECTING REARWARDLY FROM SAID HOUSING; AN AXIAL SPRING SOCKET FORMED IN SAID REAR PORTION AND OPENING TO THE REAR EXTREMITY THEREOF; A PLUNGER HEAD AXIALLY MOVABLE IN SAID SOCKET; A REARWARDLY DIRECTED NOTCH IN SAID PLUNGER HEAD; A SPRING IN SAID SOCKET ACTING TO URGE SAID PLUNGER HEAD REARWARDLY; A TRIGGER MEMBER TILTABLY MOUNTED IN SAID SOCKET REARWARDLY OF SAID PLUNGER HEAD; A TRIGGER ARM FORMED ON AND PROJECTING FORWARDLY FROM SAID TRIGGER MEMBER AND TERMINATING IN THE NOTCH OF SAID PLUNGER HEAD, SAID TRIGGER MEMBER PROJECTING REARWARDLY FROM SAID BODY MEMBER TO PROVIDE MEANS FOR APPLYING A SIDEWARD FORCE ON SAID BODY MEMBER TO FLEX SAID FLEXURE BAR, SAID FORCE BEING TRANSMITTED TO SAID BODY MEMBER BY THE RESISTANCE OF SAID NOTCH TO SIDEWARD MOVEMENT OF THE TRIGGER ARM THEREIN, UNTIL THE COMPRESSION BIAS OF SAID SPRING IS EXCEEDED; REGULATING MEANS OPERABLE FROM THE EXTERIOR OF SAID BODY MEMBER FOR VARYING AND PRESETTING THE COMPRESSION BIAS OF SAID SPRING, SAID REGULATING MEANS COMPRISING A LONGITUDINALLY MOVABLE COLLAR SURROUNDING SAID BODY MEMBER; DOWEL PINS EXTENDING FROM SAID COLLAR THROUGH AXIALLY ELONGATED OPENINGS IN SAID BODY MEMBER AND TERMINATING REARWARDLY OF SAID SPRING TO ABSORB THE REARWARD THRUST OF THE LATTER; AND MEANS FOR FORCING SAID COLLAR REARWARDLY TO EXERT COMPRESSION AGAINST SAID SPRING.