Abstract: A gage controlled grinding method for oppositely disposed commonly tapered end bores in a workpiece, maintaining a constant spacing of two identical bore gage diameters independent of part length is disclosed. A machine such as an internal grinding machine utilizes a drive plate and support shoes for locating and driving the workpiece, and a pair of gage fingers are provided at axial points proximal and distal to the drive plate. A first tapered bore in the outboard end of the workpiece is ground and gaged to a predetermined diameter at a first fixed gage distance from the curve plate. The workpiece is turned end-for-end on the drive plate, and the previously finished bore is sampled by a second gage finger located at a second fixed gage distance from the drive plate. The sampled diameter is compared with a predetermined stored value, and the sampled diameter is subtracted from the predetermined stored value to generate a difference value.

Abstract: A portable, disposable rodent trap comprises a housing having an internal, elongated tunnel-like passageway and an entrance opening through which a rodent can enter the passageway, apparatus secured within the passageway for strangling the rodent, and apparatus, triggerable by the rodent, for activating the strangling apparatus, the strangling apparatus being located at a distance from the entrance opening such that substantially the entire body of the rodent is located within the passageway when the strangling apparatus is activated and in contact with the neck of the rodent.

Abstract: During grinding, a grinding wheel effects movements of solely vertical displacement along a path parallel to a vertical guide rod. The workpiece to be machined is held by a rotatable, but not axially displaceable, chuck secured to a workpiece head. In order that helical relative movements between the workpiece and the grinding wheel may be produced, transmission components and gearing are provided for positively converting the vertical motion of the grinding wheel into rotary motion of the workpiece. For cylindrical and surface grinding, the motion-conversion arrangement may easily be disengaged or dismantled. Thus it is possible with this universal grinding machine to carry out drill grinding, cylindrical grinding, and/or surface grinding on a workpiece which need be chucked only once.

Abstract: Automatic hollow punch search device and relevant control, for die-cutting machines, particularly for footwear production, in which a mobile head is associated to means to move it to and fro, both horizontally and vertically, above a fixed faceplate on which the material to be cut is placed, together with a hollow cutting punch. The movement means are automatically piloted by a drive circuit interlocked to manual starting means which provides means to carry out a complete head movement operating sequence from its positioning above the hollow punch to its lowering and return to the starting point after cutting.

Abstract: A fishing bobber which may be readily and adjustably secured to a fishing line, said bobber comprising a buoyant body having a top and a bottom, a bearing extending from the top and the bottom of the body, each bearing having a vertical slot therein, a resilient member positioned in a cavity in the bearing intersecting the bearing vertical slot, a keeper rotatably carried on each bearing, the keeper and body each having a slot for alignment with that in the bearings, and a spring lock on each keeper whereby upon insertion of a line in the aligned slots, rotation of each keeper will cause the spring lock to force the line into engagement with the resilient member in each bearing to retain the line and the bobber in fixed relative position.

Abstract: A fishing line sinker which is composed of a block of metal one end of which includes an opening and the opposite end of which includes a protruding wire member. The wire member of one block of metal is to be inserted through an opening of a second block of metal to thereby connect together blocks of metal for increasing the weight of the fishing line sinker. Additionally, a mold is provided for making the sinker which takes the form of a pair of pivotally interconnected members each of which has a mold cavity. The mold cavities can be used in a connected arrangement or in an individual arrangement.

Abstract: A cutting apparatus for an electrostatic copying machine includes a fixed blade having a straight cutting edge, a rotary shaft mounted for rotation on the frame of the machine, and a rotary fixed to an carried by the rotary shaft, the rotary blade having a spirally curved cutting edge. A wrap spring clutch is capable of transmitting rotation of a continually rotating gear to the rotary shaft and rotary blade. The wrap spring clutch is prevented from operation by a control cog of a double cog member. An inclinable member operates the double cog member to release the wrap spring clutch to enable rotation of the rotary shaft and rotary blade. The double cog member has a rotation lock cog which stops the wrap spring clutch after a predetermined rotation of the rotary shaft and rotary blade.

Abstract: A device for working the surfaces of objects, such as abrading and brushing machines and the like comprising a supporting surface for the object to be treated and at least one working member arranged at a distance from the supporting surface and rotatably driven about a shaft parallel to said supporting surface and being movable in an axial sense in a reciprocatory manner by driving means, wherein a counterweight is fastened to a rocking arm journalled in the frame of the device and linked pivotably to said working member, in order to damp the reciprocatory movement of the working member.

Abstract: A hand tool for cutting the armor of armored cable, comprising two elongated handle members hingedly connected, the first member carrying a manually operated circular saw and the second member having a channel in which the cable is clamped during cutting. The improvement including a clamping plunger carried by a third handle member which is hinged to the second member and manually activated to press the plunger firmly and/or resiliently against the cable to hold it firmly against the wall of the channel during the cutting operation.

Abstract: An apparatus for cutting pipe and casing. An apparatus for cutting pipe and casing having a hinged frame and using the revolution of the device about the workpiece to simultaneously effect cutting of the workpiece.

Abstract: Apparatus for cutting plastic film having a serrated chromium plated cutting blade and a readily penetrable film back-up member, preferably balsa wood, aligned with the cutting blade. The back-up member has grooves formed therein by the penetrating action of the blade.

Abstract: A relief thread grinding machine for making screw taps wherein a workpiece 10 is clamped to a resiliently mounted body 5 of a longitudinally adjustable sled 1. The body carries a follower wheel 17 which bears on a cam roller 15 rotatably mounted on the sled. The surface of the cam roller is eccentrically lobed so that when it is axially moved varying oscillation strokes of the body 5 are produced. The cam roller can be axially adjusted as needed during the grinding process so that the amount of relief grind can be changed. In this manner it is possible to provide the conical thread on the lead end of a tap with a different relief grind than the generally cylindrical and posteriorly weak conical thread on the guide end of the tap.

Abstract: A tire trimmer tool has an elongated handle and a U-shaped frame to which a blade of undulated sheet metal is detachably mounted. The undulations comprise closely-spaced parallel ridges which extend front and rear, are open on their underside and are united by narrow connecting webs. The undulations are arranged across the full width of the blade; and the outermost undulations which comprise the two sides of the blade have upturned walls, the edge of which seat is facing slots provided the legs of the U-frame; and an adjustable clamp which connects the two legs secures the blade in place. The fore end of the blade is sharpened on its underside and a narrow transverse portion of the blade therebehind is struck or turned upwardly across the full width of the blade and limits bowing of the blade in response to tightening of the clamp.

Abstract: A fish bait positioner includes an off-center, weighted base having a flexible reed slideably mounted on the weighted base at one end of the flexible reed and a bait holder secured at the other end of the flexible reed.

Abstract: An improved hand tool includes a well at the top of the handle into which the upper end of the shank extends. The well is adapted to receive a torque producing socket wrench drive which engages the shank in order to transmit the torque producing drive directly to the tip of the hand drive tool. In the preferred embodiment the shank which extends into a well has a hexagonal cross-section and is adapted to cooperate with a standard socket wrench. Tips of various configuration may be employed.

Abstract: A tool for slitting a casing of a cable. A knife blade is held between a pair of holder halves. Slots in the holder halves along a part line form an opening between the holder halves of a size to receive the cable for movement axially through the opening. A corner portion of the knife blade extends from an edge of the opening transversely of the opening a sufficient distance to slit the casing of the cable without penetrating conductors of the cable as the cable is advanced along the opening.

Abstract: A grinding apparatus for forming and grinding complex curved surfaces such as the peritrochordal bore of rotary a combustion engine, e.g.

Abstract: The apparatus comprises a horizontally arranged bandsaw and one or more rotary meat holders arranged to feed primal cuts of meat downwards and onto the bandsaw to be cut into portions. A depth stop, which may be adjustable, determines the thickness of the cut portion. In a preferred form, the bandsaw is substantially totally enclosed and two meat holders are provided, one of which may be loaded while meat in the other is being portioned.

Abstract: A light fixture incorporating a motorized insect exterminator includes a frame, a light source, and a motor mounted on the frame. A drive shaft of the motor is connected to an end of a clear and pliable plastic impeller. A translucent plate is mounted between the light source and plastic impeller. The free end of the impeller is rotated between 2,000 and 3,600 RPM's by the motor, sweeping out a circular area in the proximity of the plate on the opposite side from the light source. Flying insects, attracted to the light source, fly toward the light source, slow down to land on the plate, fly through the circular area at a relatively slow speed, and are fatally hit by the rapidly revolving impeller. The impeller is flexible enough and light enough to not injure or cut a finger which comes in contact with the rotating impeller.

Abstract: A rock drill having a hydraulic system for controlling a striking, rotating and advancing movements of a drilling rod. The advancing or forward feeding conduit for a feed actuator is provided with a relief valve which is responsive to the pressure in the positive rotating conduit for a rotary actuator so that the pressure in the forward feeding conduit is relieved to weaken the advancing force when the load on the rotary actuator is increased. A further relief valve is also provided for relieving the pressure in the striker conduit to weaken the striking force. A switching valve is provided between the advancing and retreating conduits for the feed actuator so that the direction of movement of the feed actuator is automatically changed when there is an abrupt decrease in the pressure in the striker conduit.