Abstract: Wedges of novel design are interposed between the side frames and bolster of a three-piece freight car truck assembly in an effort to provide an assembly having greater high speed stability.

Abstract: The tool sharpening device comprises a base assembly holding a sharpening stone and mounting a tower assembly. The tower assembly may be shifted manually back and forth along the base assembly and the sharpening stone held therein. The tower assembly carries a platen subassembly, which may be angularly adjusted relative to the surface of the sharpening stone and shifted from side to side. Means are provided for mounting various types of tools on the platen for being sharpened by working the tool along and across the surface of the sharpening stone.

Abstract: A wind motor for the conversion of wind power to mechanical or electrical power includes a plurality of wind receptors which have valved passages therein for the passage of air therethrough during operation of the wind motor, especially when the receptors are moving against the wind, so as to diminish air resistance (drag) opposing such movement, thereby increasing the efficiency of the wind motor.

Abstract: Structural panels are assembled and set up to afford a knock-down shelter comprising a roof which spans opposed upright sidewalls. The roof and sidewall panels are detachably secured together by devices provided with interlocked parts respectively carried by the roof and sidewall panels. The interlocked parts automatically interlock while the panels are being assembled and set up to form the shelter and automatically disengage while the shelter is being knocked down.

Abstract: One end of a dead front is nested in and covered by a back plate. The end of a cord may be threaded through a hole in the back plate for connection of its conductors to terminal plates housed in the dead front. Integral with the back plate is means for clamping the cord to the back plate thereby to relieve strain on the connections of the conductors to the terminal plates.The hole in the back plate is defined by an area of the back plate which is segmented and thereby made flexible. Within limits, a cord of a diameter larger than that of the normal size of the hole may be accommodated by forcing the same past the segments and thereby enlarging the hole as required for passage of the cord therethrough.

Abstract: A rectangular wooden tray having a pair of opposed side panels, a pair of opposed end panels, and a bottom is carried by four wooden legs tied together by a system of cross bracing overlying the bottom of the tray.

Abstract: Untextured yarn is drawn from a producer's package, threaded through apparatus comprising a tension leveling device, an electric heater and a false twist device and, having been textured thereby, is wound on yarn take-up means. The false twist device comprises a staggered arrangement of friction discs and a plurality of hold down arms. The yarn passes over the rims of the several discs in contact therewith and is twisted as the discs rotate in the same direction at the same rate of speed. The arms function to effectively limit movement of the yarn back and forth circumferentially of the discs, as a consequence of which the yarn is twisted in place or very nearly in place.