Abstract: The bore of a bearing bush for a gear pump has a first recess located in a zone of load concentration in the bore, the first recess being supplied with a fluid under pressure. A second recess in the bore is located wholly outside the zone in which concentrated loads occur and acts as a reservoir for fluid, to prevent cavitation within the bore as a result of low pressures caused by radical movements of a shaft within the bush. A passage connects the second recess with a zone of lower pressure within the pump.

Abstract: A baby changing apparatus is provided in the form of a coin-operated vending machine having a fold down table on which the baby may be placed while his diaper is changed. Paper towelling is provided for the table, and a safety belt restrains the baby from rolling off the table. The apparatus vends a package containing a fresh disposable diaper and various accessories.

Abstract: A door closer device comprises a body defining an internal chamber in which a piston is slidably received, the chamber, in use, containing hydraulic fluid. A valve is arranged in a passage in the body to permit the fluid to flow through the passage in both directions between spaces in the chamber at respective opposite sides of the piston. The valve has a first part axially adjustable along the passage and a valve member attached to said first part but movable axially relative thereto in the passage between extreme positions where it engages respective stop means on the first member, the valve member allowing fluid to flow unrestricted through an orifice at one end of the passage in one direction when in one of its said extreme positions, and at the other extreme position restricting flow through said orifice in the opposite direction.

Abstract: A novel abrasives distributor is disclosed. The distributor comprises a movable assembly, and at least one gun. The assembly preferably includes an elongated, hollow shaft having an inlet, and a hollow manifold which is in communication with the hollow shaft and which is carried at one end thereof. The assembly further preferably includes a receptacle which surrounds the shaft and which is preferably carried by the manifold. The manifold includes at least one manifold outlet. A transport fluid, such as air, is introduceable into the shaft inlet, is passable through the shaft and manifold, and is exitable from the manifold via the manifold outlet. The gun is preferably independently carried by an arm which, in turn, is carried by the depends from the assembly. The assembly is movable relative to a workpiece. The receptacle includes at least one receptacle outlet. Abrasives, from an abrasive source, are introduceable into the receptacle and are exitable from the receptacle via the receptacle outlet.

Abstract: A system is provided for transmitting data from at least one control position to at least one remote display position over a plurality of transmission lines coupled between the control position and the display position. These transmission lines include a common power supply line, a ground line and a number M of conductors. Each conductor is used for transmitting one or more of a number N of different data. The display position includes a number R of display characters. The invention provides circuits for transmitting N data on M transmission lines to actuate a given combination of R display characters corresponding to each of the N data wherein both R and N are greater than M so that the transmission lines are fewer in number than either the number of data or the number of display characters.

Abstract: A motion detector system includes an ultrasonic transmitter, receiver and phase detector which produces as output signals of frequency related to the speed of movement of any moving object in a zone being monitored. The output of the phase detector is fed to two separate bandpass filters having different pass-bands characteristic of the frequencies generated by a human being moving in the zone being monitored. A warning is sounded only when signals have been present in both bands for more than a predetermined period.

Abstract: An EMI/RFI shielded housing for an electrical apparatus comprises a case member and a complementary cover member, each comprising an end wall portion and a side wall portion together defining substantially continuous and unbroken peripheral surfaces. The side wall portions of these members are respectively configured for an interference fit therebetween to define an assembled condition of the housing. This interference fit is defined by the side wall portion of the case member being received interiorally of the side wall portion of the cover member. Moreover, substantially the entire inner surfaces of the end wall portions of both case and cover member are electrically conductive, substantially the entire inner surface of the side wall portion of the case member is electrically conductive and major fractional portions of respective facing surfaces of the assembled and interference-fitted side wall portions are electrically conductive.

Abstract: A bow-string mounted, self-aligning, positively positioned peep sight for a compound bow. The body of the peep sight includes a plurality of posts extending therefrom and about which divided strands of the bow string are laced or woven for selectively positioned securement of the peep sight in place. A peep sight hole is formed as a sighting port extending through the body of the peep sight. A bow sight aligner distinct from the string-mounted bow sight is secured to the bow string and connected by means of a tensioning band to a straight cable segment of the compound bow, whereby when the bow string is drawn, the band is tensioned and acts upon the bow string positively and reproducibly physically to orient the peep sight mounted thereon so that the sighting path through the peep sight bears directly on and aligns precisely with a longitudinal axis of an arrow held in the drawn bow.

Abstract: A control valve arrangement includes at least one first supply and exhaust valve, and a second supply and exhaust valve. The first and second valves are arranged in series and are manually operated with a single hand. The first valve is manually displaced in one direction, and the second valve is displaced in the opposite direction.

Abstract: A snap fastener and method of attaching the same to a section of sheet material are disclosed. The snap fastener comprises an operative component and a securing component, both of these components being formed of plastics material. The operative component has a base wall with an opening therethrough and a tubular portion including a snap engaging portion formed thereon surrounds the opening and projects from one side of the base wall. The securing component has a pin and a cap flange at one end thereof, the pin being adapted to pass through the opening of the operative component so that the terminal end portion of the pin is located beyond the side of the base wall from which the tubular portion projects. The terminal end portion of the pin is deformable when so located relative to the operative component so as to secure the two components against separation. At least a peripheral portion of the cap flange slopes outwardly in a direction towards the terminal end of the pin.

Abstract: There is disclosed a door position monitoring assembly for a security door installation wherein the assembly can be adjusted and preset from the exterior of the assembly. In this regard, the monitoring assembly includes a base member with switching means carried by the base member and capable of being operated to attain a first condition and a second condition, each of which conditions can be detected by suitable circuit means. A control arm produces operation of the switching means and has one end thereof coupled for movement with said door and the other end piotally mounted to the base member.

Abstract: Method and dies for threading a screw comprises providing a screw blank with a portion of its length of lobular cross section and an adjacent portion of the blank of circular cross section. The blank is rolled between roll dies so as to roll the thread on the circular portion and simultaneously roll the thread at the lobes only on the lobular portion. Thereafter, the blank is rolled to additional regions of the dies wherein the thread is rolled to form on the lobular section, while the cylindrical section passes through regions of clearance or relief on the dies.

Abstract: A prefabricated cement-foam composite board is provided for use as in a built-up roof construction. The board includes an insulating panel of foam plastic resin, preferably polystyrene, and a layer of lightweight concrete bonded thereto. The lightweight concrete preferably includes a lightweight aggregate and is foamed and further includes a latex. A latex adhesive is used to bond the concrete layer to the foam plastic layer. Reinforcing material may be included in the concrete.

Abstract: A roller-type drive is provided having three rollers, one of which is a wedging roller which produces a tighter wedging action for all three rollers in response to increasing torque. A cross-pin is provided in the stud or axle about which the wedging roller turns, and this cross-pin is biased by a spring-pressed axial pin having a tapered nose received in a tapered notch in the cross-pin such that the cross-pin initially urges the wedging roller into wedging position. The cross-pin subsequently follows the wedging roller as it moves further into wedging position, but eventually is stopped by the axial pin, and thereafter limits further movement of the wedging roller into wedging position, thereby limiting the torque that can be transmitted by the roller-type drive.