Abstract: A credit card imprinter having a number of rotatable type faces to imprint the amount of purchase on a credit card receipt. The type wheels are coaxially arranged and rotatably supported adjacent and in contact with the receipt to be imprinted. The imprinter is provided with a mechanism for positioning the type wheels which includes a member which translates along the type wheels to successively set same to the desired position, thereby allowing all of the type wheels to be positioned with a single mechanism. A roller is then used to imprint the type on the receipt and the type wheels are reset to the starting position by a reset mechanism.

Abstract: A method and apparatus for detecting leaks in a test chamber utilizing pressurization of the chamber with a gas, compares the rate of change of the gas pressure in the test chamber with the rate of change of the temperature of that chamber with the difference in such rates of change being read as a function of test chamber leakage.

Abstract: Leakage of a pipe wall is detected by forming a test chamber around the pipe radially opposite the wall area to be tested by bringing together a pair of test chamber halves each including a semi-annular anvil segment, an outer housing segment and an elastomeric seal sandwiched between the segments with the ends of the anvil segments of the respective test chamber halves being brought into abutment and continued closing movement of the test chambers causing the outer housing segments to extrude the elastomeric seals radially inwardly around the non-yielding anvil and against the pipe surface and circumferentially to effect a hermetic seal at the meeting ends of the test chamber halves and at the pipe wall surface. Thereafter the test chamber formed between the pipe surface and the encircling anvil ring is pressurized and changes in the pressure are read as a function of pipe wall leakage.

Abstract: Method and apparatus for forming a twisted skein in a filament for use in a coil winding machine without severing the filament. The apparatus is provided with a pair of spaced apart filament guides between which are located looping needles about which the filament is wound by a looping element carried by an endless drive member. When the required numbers of loops have been formed about the needles, one needle is rotated, causing the loops to be formed into a skein. An electromagnet wire tensioner and a closed loop automatic wire tensioning system are also described.

Abstract: The present invention concerns a seal for addition and/or removal of gaseous or liquid media in a tunnel washing machine, with which two sealing gaskets are arranged on a fixed trough for the receiving of units.

Abstract: Apparatus for forming a tread, such as a tank or earth moving equipment tread, into a roll for transport. First and second support members are mounted on a vehicle, such as a forklift truck. A blade having an inclined, tapered front portion is movably mounted on one of the support members and releasably engages the opposite support member to engage the tread and urge the end of the tread into a roll as the vehicle is moved over the tread. A roller is mounted between the support members rearward of the blade to urge the end of the tread into a roll. Pins mounted on the support members are movable into the center of the tread roll to support the roll above the ground for transport. Lock means are provided for the pins in either of the first or second positions.

Abstract: A pair of pipe clamps each having a pair of gripping members for clamping a pipe therebetween with the pipe extending through the clamps beyond opposite sides and with each clamp having a generally L-shaped projection away from the gripping members with the plane of the web lying in the plane of a pipe clamped in the gripping members and means for pivotally connecting and adjustably clamping the webs.

Abstract: A fluid-powered rotary table formed of a base and a rotary housing which sealingly cooperates therewith along a planar surface. A toroid-shaped annular cavity is formed between the base and the rotary housing which are rotatable relative to one another along a central axis perpendicular to the plane and the toroid-shaped annular cavity. The annular cavity is divided into two fluid-tight annular segments by a stationery block affixed to the base and projecting into the cavity and a rotary block affixed to the rotary housing and projecting into said cavity. By admitting or removing fluid from each of the annular cavity segments the rotary housing may be moved relative to the base.

Abstract: The phenomenon of pop-back of the nail insert for anchor nail fasteners is prevented by providing a dimple-like indentation in the wall of the tube sufficient to grip the insert nail after it has been driven down the tube. For longer length anchor nails, two such dimple-like indentations may be provided.

Abstract: An optical sensor for determining the position of a rotating shaft, comprised of a first and second light deflecting means, a light sensing means, and a means for providing a source of light. The second means for deflecting light is mounted on the shaft and rotates as the shaft turns, deflecting light from an axial path parallel to the shaft to a second radial light path. The shaft extends through and turns relative to a first light deflecting means which deflects light from a first radial path to the axial path optically coupling the first and second radial light path as the shaft turns. A source of light and light sensing means are provided in the radial light paths which are optically coupled at discrete shaft positions.

Abstract: An apparatus having a pair of brackets for attachment to the feet of the patient which are interconnected by a number of links pivotably attached to the shoe brackets. The shoe brackets are maintained in constant parallel spaced apart relation preventing transverse movement and relative rotation of the patient's feet about the vertical and longitudinal axis. The patient's feet may freely move relative to one another along the longitudinal and vertical axis as well as rotate about the transverse axis.

Abstract: For use in the prepressing of laminated safety glass in which glass-plastic assemblies are sealed in individual plastic bags, a rectangular heating oven having a bottom wall provided with a longitudinally extending slot, a plurality of portable racks, each rack being provided with a solid base operating slot in the bottom wall of the oven and with a plurality of horizontal shelves positioned in spaced relation one above the other for supporting individual assemblies, the shelves being pivotally mounted and movable to a vertically inclined position to permit the placement of one of the assemblies on the next lower shelf or its removal therefrom. Each rack is provided with means for creating a vacuum in the associated plastic bags to withdraw the air therefrom as well as from between the laminations. Means are also included for advancing the racks through the oven in end-to-end abutting relation to close the slot and provide a substantially closed heating chamber in the oven.

Abstract: A skylight assembly for a sloping roof is mounted so that the upper end may be tucked beneath the roof covering so that rain water will drain onto an outer skylight panel; the panel is concave and its lower end extends over the roof covering so that rain water will drain from the panel onto such covering; within and beneath the skylight there is an inner skylight panel mounted for movement to permit ventilation of the room beneath.

Abstract: A low profile snap fastener comprising a telescoping stud and receiver has latching and locking diameters measured across the stud which are so related to the internal diameter of the receiver that the stud and receiver can only be telescoped to and from a locked position by a predetermined relative motion between them.