Abstract: A torque-limiting driver includes a housing, a shaft carried by the housing for rotation relative thereto and having a workpiece-engaging tip projecting from the housing, a torque-limiting mechanism coupled between the housing and the shaft and responsive to rotation of the housing in a predetermined direction to rotate the shaft at torques below a predetermined torque and accommodating rotation of the housing relative to the shaft at said predetermined torque and above, a torque-determining structure disposed in the housing and movable relative to the torque-limiting mechanism for adjusting the predetermined torque, and the housing including a stop portion engageable with the torque-determining structure for preventing torque-adjusting movement thereof.

Abstract: A Torque Tool Calibrating Machine comprising an elongate torque tool engaging transducer including a strain gauge and mounted on a turning axis; an electronic analyzer connected with the gauge and operating to analyze, translate and display the voltage drop across it in torque force units and to emit a control voltage when it operates to display a predetermined maximum units of force, a manually driven gear transmission to turn the transducer including drive and driven gear wheels, a turntable supported on said turning axis and coupled with the transducer, an elongate lever arm projecting radially from the turntable and drivingly coupled with the transmission to selectively rotate the arm, table and transducer clockwise and counterclockwise, and a locking mechanism selectively operable to lock one of the gears against clockwise or counterclockwise rotation and including solenoid-acutated latch units with pawls that engage the gear when the solenoids are energized; a controller circuit connected between the an

Abstract: The Torque Transducer structure comprising a lower base plate, and an elongate torque member projecting vertically upwardly from the plate. The member has rigid upper and lower end portions and a central deflection portion that is rigid through a first radial plane through the structure and is flexible through a second radial plane of the structure which is at right angle to the first radial plane. The central portion of the member carries strain gauges and is torsionally deflected by torsional forces directed onto the upper end portion of the member. The member is subject to adverse lateral deflection through the second radial plane of the structure by lateral forces directed onto its upper end portion. The lower end portion of the member is coupled with the plate against rotation and for free pivotal movement relative thereto through said second radial plane of the structure.

Abstract: A weighing scales structure comprising an elongate unitary tension rod having an elongate reaction end portion with inner and outer ends and a force-transmitting coupling part at its outer end, an elongate working end portion with inner and outer ends and a force-transmitting coupling part at its outer end, a central elongate elastic portion extending between and integrally joined with the inner end portions of the reaction and working portions; and, a plurality of strain gauges fixed to the elastic portion. The scales next include an elongate housing freely engaged about the central elastic portion and the inner end of the working end portion and releasably clampingly engaged with and about the inner end portion of the reaction portion. A circuit board and a battery power supply are mounted within the housing. The circuit board carries a bridge circuit in which the strain gauges are connected and a light emitting digital readout device which is visible through a window in the housing.

Abstract: An adjustable, click-type, torque wrench comprising an elongate tubular arm with front and rear ends, a work engaging head on an axis normal to the axis of the arm, an elongate lever projecting rearward from the head and freely into the arm, a first pivot pin pivotally connecting the front end portions of the lever and the arm together on an axis parallel with the axis of the head, an elongate link with front and rear ends within the arm, a second pivot pin connecting the front end of the link to the rear end of the lever on an axis parallel with the first pivot pin, an elongate fulcrum block slidably engaged in the arm and freely engaged about the link, a fulcrum pin engaged through the block and the link on an axis parallel with the pivot pins to provide for pivotal movement of the link relative to the block, a plunger in the arm rearward from the link, a cam block with flat faces normally in flat engagement with flat opposing cam seats on the link and the plunger; and a spring yieldingly urging the plunger

Abstract: Improved, manually-operable, adjusting mechanisms for click-type, adjustable torque wrenches which include manually-engageable, resilient, plastic, tubular handgrips slidably engaged about the rear end portions of elongate, tubular, metal wrench lever arms and which are shiftable longitudinally from normal, forward positions in rotary-driving engagement with the arms to actuated rear positions out of rotary-driving engagement with the arm. The invention resides in an improved locking mechanism releaseably locking the grip in rotary-driving engagement with the arm when in its normal position and yieldingly permitting rotation of the grip relative to the arm when turning forces between the arm and grip exceed the shear strength of the material of which the grip is made.