Abstract: A polyphase AC current limiting circuit, which incorporates improvements in control methods and circuitry that operate to avoid high rates of current change which occur upon initiation of a branch load fault and when the branch load fault is suddenly cleared. This "soft" start and "soft" load-off characteristic, reduces the voltage transients imposed on the AC power source and bus to relative insignificance compared with the voltage transients imposed by prior art current limiting circuits. The invention AC current limiting circuit comprises a high impedance circuit connected in parallel with a low impedance circuit, a load-off circuit connected in shunt with the device output power lines, and a control means for controlling the switching devices.
Abstract: A device for locking a floppy disk drive so that the drive can not be used to read the files stored on the diskettes. The preferred embodiment of the device is made of two assemblies, one of which includes a blank diskette which is inserted in the open empty disk drive. The second assembly, acting as a clamp, is placed over the protruding face of the first assembly in a manner so that the disk drive lever is enclosed by a cutout or notch in the clamp, and a lock screw in the clamp engages the first assembly. Alternately, no blank diskette is utilized with the first assembly. Instead, the first assembly includes a hard plastic tongue which is inserted in the open disk drive. Rotating the lock screw by a key placed in the clamp barrel lock, pulls the clamp until it is tightly seated against the disk drive face, preventing the disk drive from being opened and a diskette inserted.
Abstract: A device for locking a spare tire wheel which is mounted vertically on the back of a vehicle. The spare is mounted on studs that project from the back of the vehicle and is fastened in place with stud nuts. The device comprises three major metal parts: One part is a rectangular section tube that fits over one of the studs, with the stud protruding up through it. Another part is a locking assembly shaped to hold the stud nut in place. This assembly is inserted in the tube until it grasps the stud nut. The third part is a cylindrical lock plug which is inserted through a hole in the top of the tube and also through a hole in the locking assembly. Turning a key in the lock plug releases a lock pin that prevents removal of the lock plug. The stud nut can not now be accessed for removal, and the spare tire wheel is prevented from being removed by unauthorized persons.
Abstract: A racquet for use in tennis, racquetball, squash and badminton, having an oval or round head, two symmetrical shafts forming the racquet handle and two grips that are offset from the centerline of the handle. The grips may be angled or paralleled with the centerline. In the preferred embodiment, an adjustable torque stabilizer connects the two grips, providing torsional rigidity and permitting adjustment of the space between the grips. The racquet grips are configured so that the player holds the racquet by both grips, and can simply let go of one grip and swing the racquet with the other hand to play `forehand` shots, thus eliminating the critical time normally taken to switch grips.
Abstract: A security device for preventing the unauthorized use of a cassette tape deck installed in automobiles, or for locking CD players or computer disk drives. The invention is simple in conception and is made of only two asesmblies. One assembly is a transverse block made of rigid plastic, having a readward member projecting from its back surface and incorporating a cylindrical lock. The other assembly is a "T" shaped tongue piece made of stainless steel. The tongue piece is inserted in a horizontal slot cut in the transverse block, and the top of the "T" plus the rearward projecting member is then inserted in the cassette chamber opening. When pulled through by hand, a projecting ridge on the tongue piece hooks on to and bears against the inside surface edge of the cassette chamber opening. Rotating the cylindrical lock with a key causes a key element to engage one of a number of slots that are cut in the tongue piece.
Abstract: A heavy duty garage shelf assembly having shelf brackets that may be easily moved up or down and adjusted in place. The assembly is comprised of two steel vertical support tubes that are each bolted to a wall by a clamp at the top and a shoe-clamp at the bottom; and a number of shelf brackets. The shelf-brackets are made of steel tubing welded to form a cantilevered right triangle, with the base of the triangle being a tube that fits over the vertical support tubes and can slide up and down. The shelves are 0.75 in. thick in 1 in. thick wood plywood and are bolted to the shelf brackets. The garage shelf assembly, when using 11/2 inch diameter vertical support tubes, is capable of supporting up to 200 pounds total load on its shelves. For heavier loads, larger diameter vertical support tubes of 1.75 inch or 2 inches diameter should be used. The shelves can be extended in length by the addition of a vertical support tube and shelf brackets a distance apart at either end of the assembly.
Abstract: A shade for protecting an infant from incident sunlight while transporting the infant in an automobile. The shade is made of an opaque, light weight, washable material, to which are attached two drawstrings. The drawstrings hold the shade in position by means of attached suction cups to the front or back automobile window, and tying to the front seat headrest.
Abstract: A device for securing the tailgate of a pickup truck, so that it can not be removed by unauthorized persons. The device is made of three steel assemblies, one of which is fitted over a tailgate extension, using the extension as an anchor for holding the device in place. A second assembly, acting as a clamp, is attached to the first by a fixed bolt and a nut. The clamp, presses on the side wall of the pickup truck, pulling the tailgate to it. Attached to the nut is a tube that holds a lock plug. When a lock plug is inserted in the tube, the nut can not be rotated and loosened. The lock plug is a cylinder lock, locked by a key and protected against weather by a plastic cap.