Abstract: An improved railroad frog bolt-nut assembly is disclosed. The bolt has a square head and a shank. The shank has an unthreaded portion adjacent the head and a threaded portion at its terminal end. The threaded portion is rolled to a diameter equal to the shank's unthreaded portion to produce high fastener strength. A unitary lock nut is formed with an annular boss extending from its outside end in which indentations intersecting with some of the nut threads are pressed to provide an interference, locking fit with the bolt threads.

Abstract: An improved railroad frog bolt-nut assembly is disclosed. The bolt has a square head and a shank. The shank has an unthreaded portion adjacent the head and a threaded portion at its terminal end. The threaded portion is rolled to a diameter equal to the shank's unthreaded portion to produce high fastener strength. A unitary lock nut is formed with an annular boss extending from it's outside end in which indentations intersecting with some of the nut threads are pressed to provide an interference, locking fit with the bolt threads.

Abstract: A torque wrench in which large torquing forces are applied to a workpiece by a ratchet and pawl mechanism allows the workpiece to be pretightened before final tightening by the wrench and includes an adapter assembly for transmitting torquing forces delivered independently of the pawl to the ratchet. The adapter assembly, which may be adapted for use with any ratcheting torque wrench, comprises an adapter member which is interlockingly received at one end within an axial opening of a ratchet gear and which includes at its other end a central aperture, a male extension, or a combination of the two for coupling to an external torque transmitting device such as an open ended wrench or an air powered wrench. Additional transition members are optionally provided to adapt the adapter member for use with commercially available torque transmitting devices.

Abstract: A torque wrench in which the torquing forces are applied to the article torqued equally and oppositely in a diametrically opposed manner. The body of the wrench comprises a two-part metal frame which permits the wrench to be significantly lighter than prior art wrenches. The applied forces may be provided by at least four hydraulic cylinders mounted in a frame, equally spaced about a central opening in which the article to be torqued is gripped. The fluid power cylinders apply force to the legs of a rotatable drive means which, in turn, rotates the member torqued. In order to provide rotation in both directions, each cylinder of the wrench is pivotable to permit the drive means to be selectively rotated in opposite directions.

Abstract: Methods of making superplastically formed and diffusion bonded articles are disclosed as well as the articles made from such methods. Metal sheets are superplastically formed and diffusion bonded in a manner such that pillows are formed on respective outer surfaces thereof, providing a cellular structure interconnected by channels permitting control of gas pressure with the cells. The cellular structure can, in one embodiment, be twisted and the cells can be inflated through superplastic forming. The twisted cellular structure is particularly useful as an intermediate stiffener for an airfoil.

Abstract: A torque wrench in which the torquing forces are applied to the article torqued equally and oppositely in a diametrically opposed manner. The body of the wrench comprises a two-part metal frame which permits the wrench to be significantly lighter than prior art wrenches. The applied forces are provided by four hydraulic cylinders mounted in a frame, equally spaced about a central opening in which the member to be torqued is gripped. The fluid power cylinders apply force to the legs of a rotatable drive means which, in turn, rotates the member torqued. In order to provide rotation in both directions, each cylinder of the wrench is pivotable to engage two adjacent legs of the drive means and thereby permit the drive means to selectively rotate in opposite directions. The hydraulic wrench according to the invention is provided with a self-contained hydraulic system in order to create a completely portable unit which is generally free from hydraulic contamination.

Abstract: An arcuate spring having a plurality of helical coils which are configured and dimensioned to provide an arcuate shape to the spring and being substantially free of internal stressses which would tend to urge the coils into linear alignment. The spring is designed to function under load conditions while maintaining its natural arcuate shape. The spring is adapted for use in a channel having an arcuate shape approximately matching that of the spring itself, for providing resilient force in a direction tangential to the arcuate centerline of the spring at its contact ends.

Abstract: A plastic leaded chip carrier connector of a base having a plurality of apertures for receiving and orienting a plurality of wire pins therein, and a plurality of wire pins each of a predetermined configuration lockingly engaged within a corresponding aperture of the base for transmitting electrical information therethrough. The wire pins, which are of circular cross section are formed to have a generally U-shaped portion which permits the pins to be held in place in the electrical insulating body of the chip carrier in a snap-locking manner.

Abstract: Methods of making superplastically formed and diffusion bonded articles are disclosed as well as the articles made from such methods. Metal sheets are superplastically formed and diffusion bonded in a manner such that pillows are formed on respective outer surfaces thereof, providing a cellular structure interconnected by channels permitting control of gas pressure with the cells. The cellular structure can, in one embodiment, be twisted and the cells can be inflated through superplastic forming. The twisted cellular structure is particularly useful as an intermediate stiffener for an airfoil.

Abstract: A plastic leaded chip carrier connector of a base having a plurality of apertures for receiving and orienting a plurality of wire pins therein, and a plurality of wire pins each of a predetermined configuration lockingly engaged within a corresponding aperture of the base for transmitting electrical information therethrough. A method for making such connectors by aligning the base with a wire feed device, advancing one end of a wire from the wire feed device on one side of the base through an aperture in the base to the opposite side of the base, forming a predetermined configuration of the wire end, retracting the formed wire into the aperture to lockingly engage said formed wire end therein, cutting the wire to form a pin locked in the aperture, and repeating the previous steps to form a pin in each aperture of the base. Also, an apparatus for carrying out this method to manufacture the desired connectors.

Abstract: A plastic leaded chip carrier connector of a base having a plurality of apertures for receiving and orienting a plurality of wire pins therein, and a plurality of wire pins each of a predetermined configuration lockingly engaged within a corresponding aperture of the base for transmitting electrical information therethrough. A method for making such connectors by aligning the base with a wire feed device, advancing one end of a wire from the wire feed device on one side of the base through an aperture in the base to the opposite side of the base, forming a predetermined configuration of the wire end, retracting the formed wire into the aperture to lockingly engage said formed wire end therein, cutting the wire to form a pin locked in the aperture, and repeating the previous steps to form a pin in each aperture of the base. Also, an apparatus for carrying out this method to manufacture the desired connectors.

Abstract: A spring counterbalance mechanism suitable for counterbalancing window sashes or the like. In one embodiment of the invention, the device has two rotatable drums and a spring disposed within the drums. The spring is connected to a spring arbor on one drum and connected to the interior of the other drum to generate counterbalancing forces for resisting rotation of the two drums. Two rotatable reels are coupled to the drums by peripheral gear teeth on the drums and the reels, and cords are wound on the reels for transmitting the forces to loads. The hubs of the reels on which the cords are wound are substantially smaller than the drums. A clutch mechanism is provided for selectively decoupling the spring arbor from the drums, to permit presetting the spring tension by rotating the arbor without rotation of the drums. In an alternate embodiment, stronger and more uniform forces are obtained by providing two pairs of drums and two springs.

Abstract: The disclosure is of a spring cartridge for a spring operated re-wind mechanism such, for example, as those used with pull cord type engine starters.

Abstract: The disclosure is of a mechanism for raising and lowering a window, such as the window of an automobile, the mechanism being of the type in which a flexible belt or chain connected to the window is moved along a fixed track, and a window counterbalancing spring is provided.

Abstract: The invention is a spring device which is connected to the shaft on which a seat belt or the like is spirally wound and which is operable to retract the strip to a wound condition after it is extended and released, in which means are provided for holding the spring in pre-wound condition prior to installation in a seat belt assembly.

Abstract: The invention relates to a spring assembly for retracting a spirally wound seat belt to retracted condition after extension in use, and provides means for locking the spring in pre-wound condition prior to assembly with the seat belt.

Abstract: The disclosure is of a spring operated re-wind mechanism such, for example, as those used with pull cord type engine starters.