Abstract: A pneumatically powered hand-held torque wrench having a dial gage arranged on the handle portion of the wrench to display the amount of torque exerted upon a fastener by the tool. A pointer indicates the tool maximum torque attained during tool operation, including manual torquing effort by the tool operator, which pointer maintains maximum torque read-out until the pointer is reset by the operator. A mechanical linkage arrangement transmits tool handle flexure into rotation of the dial gage to indicate maximum torque value developed upon a fastener being worked upon.

Abstract: A pneumatic tool governor having a body rotatable with the rotor of the tool, the body being provided with holes for passage of motive fluid to the motor of the tool, and a centrifugally responsive valve element pivotally mounted upon the governor body so that the fluid conducting holes are progressively blocked as tool rotary spped increases to the point where rotary speed attains a predetermined value.

Abstract: A road surface removing machine including a modular assemblage, having a rotary cutter drum unit with flailing arms adapted to impact upon a road surface for disintegration of the surface, said drum unit having four degrees of movement, boom means associated with a rail means assemblage for operative movement of the cutter drum, outrigger means for stabilizing the machine, a vacuum operated system for picking up disintegrated road surface debris and depositing it in a separation bin, and an hydraulic circuitry for operation of the components of the machine.

Abstract: A method and apparatus for controlling final tension on a fastener being run up and set. An efficiency factor is developed and utilized for attaining predetermined final tension on a fastener, or a group of similar fasteners, being operated upon. The efficiency factor is a ratio between work on a theoretical fastener, i.e., one wherein friction load is absent in work calculations, and work on an actual fastener. Having obtained the efficiency factor, the actual torque load on a fastener to attain predetermined tension value, can be established by use of the efficiency factor.

Abstract: A breast drill including a casing of elongate hollow form containing gearing for transmitting drive to a drill chuck, and a grip handle connected to the casing and capable of angular adjustment around the casing so that it can be located at a required position in relation to the position of a crank handle which can be turned to transmit drive to the chuck.

Abstract: An air compressor of the globoid-worm type having a rotor formed with a plurality of threads in meshing relation with two oppositely arranged star pinions. The rotor and star pinions are arranged in a single piece housing which incorporates all openings as required for assemblage and operation of the functional elements of the compressor. The rotor has an integral shaft which projects from the housing. A cover encloses an end of the housing and is provided with outlet passages for the air compressed in the housing. Oil injection openings are arranged in the housing for application of lubricant to the rotor for sealing and cooling purposes.

Abstract: A key for a drill chuck, the key including a geared head part connected to a separately formed handle part of machined, forged, cast or moulded form.

Abstract: A two-speed pneumatically powered rotary nut runner having an auxiliary motor, and a main motor axially offset from the auxiliary motor and being drivingly connected thereto by a reduction gear cage. An output spindle is provided for engagement with a drive shank for setting of a threaded fastener, and an intermediate spindle, drivingly connected to the auxiliary motor, is coupled to the output spindle by planetary gears. A torque signal assembly is operatively associated with the main motor and is operative upon reverse rotation of the main motor to generate a pneumatic signal indicative of such reverse rotation. Reverse rotation of the main motor is caused by the auxiliary motor when it has exerted predetermined final torque upon the threaded fastener. The fact that the main motor is axially offset from the auxiliary motor, allows the rotor of the main motor to be of smaller diameter.

Abstract: A drill chuck key with ejector means for disengaging at least its geared head part or at least its pilot portion from the chuck when released by the user.

Abstract: A chuck for drills and the like including at least three jaw elements of tapered form connected to a jaw carrier by means of flexible elements. Means are provided for urging the jaw elements axially relative to a nose cone so that they act against a frusto-conical bore portion of said nose cone and are urged radially inwards, accompanied by flexing of the flexible elements, to grip the shank of a drill or the like.

Abstract: A drill chuck including a main body part having jaws slidably mounted for converging movement in respective guides. A nut member is rotatably mounted on said main body part and has screwthreaded engagement with the jaws. A cylindrical sleeve is connected at one end to the nut member and at its other end surrounds a portion of a further body part. The further body part, which is provided with mounting means for connecting the chuck to a power tool driving spindle, has an initial degree of co-axial alignment with the main body part but a self-centering action is allowed when drilling.

Abstract: A thermometer unit for monitoring the temperature of a fluid cooled electric transformer, the unit having a ceramic body insertable between the coils of the transformer winding immersed in cooling fluid in the transformer case. A nylon element responsive to heat changes is confined in the interior of the body and is adapted to expand according to developing heat changes. A flexible tubing having a loop portion fronting a tapered end of the nylon element is filled with a fluid which is caused to oscillate in the tubing accordingly as a rocker arm alternate actuates a pair of associated bellows. As the nylon element expands in response to a temperature rise, it squeezes the tubing causing a load to be placed upon the rocker arm which is indicative of the corresponding temperature change.

Abstract: A non-impacting nut running pneumatic tool in which torque pulses are transmitted by an oscillating air motor through a one-way clutch and reduction gearing to the work. A torque responsive cam clutch member responds to a predetermined delivered torque to cause stalling of the motor by blocking off escape of exhaust air and to cause discontinuance of further torque transmission to the work by disabling the drive connection. Manually operable adjusting means is provided to regulate the value of torque delivered.

Abstract: An indicator to show that a pressure relief device has operated. The indicator of the invention comprises a flexed spring which is released to move to an upright position when the pressure relief valve is caused to operate.