Abstract: A scratch resistant coating for peroxide curable urethane elastomers comprises a radiation curable composition including at least one polyfunctional monomer having three or more acryloloxy groups per molecule, preferably five or more acryloloxy groups per molecule, and at least one N-vinyl imido group containing monomers. The coating is applied to at least one mold surface and the mold is closed for receiving the urethane elastomer. Following curing of the urethane elastomer, a coated, molded product is obtained which has improved scratch and solvent resistant properties on the surface or surfaces of the mold to which the in-mold coating was applied. The coating composition in combination with the elastomer, and the method disclosed in the present invention are especially well suited for coating plastic, optically clear lenses, i.e., those to be used in eye glasses.

Abstract: A powered work clamping device including a housing with an upper and lower chamber and an intermediate chamber communicating with the upper and lower chambers, an upper and lower piston respectively residing in the upper and lower chambers, and wherein the lower piston has a section with reduced diameter slidably and rotatably operating in the intermediate chamber, an index rod projects from the lower piston into an index bore in the upper piston and a piston rod connected thereto. The piston rod projects from the housing and is secured to a work-engaging head. The head is rotatable and independently extendable depending upon operation of the upper and lower pistons and means for rotating the lower piston and actuated upon operation of a check valve served by one of two independently actuated two-stage directional control valves.

Abstract: A medical examining lamp includes a first tubular standard mounted on a base and extending upwardly therefrom and a second tubular standard telescopingly received within the first standard and having a lamp socket mounted at its upper end. A spring assembly is mounted on the lower end of the second standard and includes first and second leaf springs mounted in and diverging outwardly from one end of the second standard. The leaf springs are retained in position by deforming the end of the second standard inwardly into engagement therewith. An arcuate tip is formed on the outer end of each leaf spring for resilienly engaging the inner surface of the first standard.

Abstract: An insert assembly for a stationary fuel tank filler cap retainer for motor vehicles including motorcycles and the like. The insert assembly includes a hollow inwardly threaded tubular stem to be received in the bore of a tubular member of the filler cap retainer communicating with an opening in the fuel tank. The insert assembly includes a retainer spring member having outwardly extending, angularly disposed spring clips to be received by a notched stationary retainer. The clips are further formed to provide an over-center latching relationship an inwardly extending flange of the retainer upon insertion into the insert assembly the bore of a hollow retainer tube. The insert assembly includes an internal continuous thread for threadingly receiving a fuel cap having a threaded closure stem, and further includes an outwardly extending flanged portion overlying the flange of the stationary retainer tube for protection from deleterious contact with a fuel dispensing nozzle.

Abstract: A belt is disclosed which may be used for support, comfort and/or decoration, and has particular application in weight lifting, kidney support or other protection and which is of a construction utilizing a plurality of layers, one of which is of an elastically yieldingly compressible and shape-restoring material.

Abstract: A motorcycle has a frame, a front wheel and Y-shaped rockers attached to the axle of the front wheel on either side. Also attached to each rocker is a rigid fork which directly connects the rocker to the frame of the motorcycle and a springed fork which connects the rocker to shock absorbing means which are likewise mounted on the rigid fork. The springed fork is mounted to the rocker intermediate the points at which the rigid fork and axle are mounted to the rocker. The rigid fork is attached to the rocker using an adjustable, split spherical bearing which is attached and held to the rigid fork by a stud. This bearing arrangement engages a pair of bearing races which are held in two prongs of the Y-shaped rocker. Similarly, the springed fork has a stud passing therethrough which also holds a spherical bearing. The bearing engages a bearing race which is held within the rocker.

Abstract: A hydraulic pressure control valve includes a modulator-controlled solenoid assembly which selectively axially displaces a disc armature adjacent thereto. When not attracted by the solenoid, the armature is biased away from the solenoid by a wave spring. Movement of the armature opens and closes the outlet of a lower body member to a source of hydraulic fluid under pressure. The armature is improved, having dimples on the face adjacent the solenoid assembly to minimize sticking. Additionally, the center pole of the solenoid is axially adjustable and can therefore be set for different valve performance levels. Assembly of the valve is quickly accomplished using pneumatic pressure under performance conditions for adjustment of and setting the initial displacement of the disc armature. Setting is accomplished by crimping the various components in an outer tube.

Abstract: A control for an inverter operable for converting direct voltage and current to alternating voltage and current. The inverter includes a plurality of electrical valves each operable to conduct current in a single direction upon the application of a positive voltage in the forward direction and the receipt of a trigger pulse. The control provides successive trigger pulses for commutating the current between successive valves at predetermined electrical firing angles and includes a voltage-time area calculating circuit for calculating the maximum permissible firing angle which will permit successful commutation. An inverter commutation failure prevention circuit is coupled to the alternating current network for detecting abnormal voltage conditions and for producing a control signal functionally related to any deviation in the alternating voltage from the expected voltage condition. The control is responsive to the control signal for reducing the electrical angles of the trigger pulses provided to the valves.

Abstract: The present invention comprises a mixing paddle assembly which may be used with a variety of mixing devices, but which is especially useful with devices which include a motorized carriage adapted to move along a beam spaced above an elongate mixing vat. Depending from the carriage are a pair of shafts, and within the carriage a separate motor is adapted to move the shafts upwardly and downwardly as the carriage moves along the beam. The mixing paddles of the present invention are affixed to the end of such shafts. The improved paddle assemblies of the present invention include a pair of plastic blades mounted to a blade assembly which includes laterally extending, stationary pegs residing in arcuate slots of pivotably supported end plates, so that the blades may be freely rotated on supporting shafts to be angled differently on the forward and return passes of the paddles. The supporting shafts extend substantially normal to the axis of the respective depending shaft.

Abstract: An information display system comprising a computer device having at least one input member for receiving video information and a processor member connected to said input member for processing and/or controlling digital video information contained in and/or obtained from the video information received from the input member and/or digital video information produced by the computer device itself in order to produce display data and control-signals, a communication channel comprising a data bus connected to the processor member of the computer device and a control bus for the transmission of the display data and the control-signals respectively, a memory device connected to the data bus for storing display data received from the data bus, a memory control-device connected to the control bus for controlling the storage of display data in and reading stored display data from the memory device in response to control-signals received from the control bus, a digital/analogue converting device connected to the memory

Abstract: A direct contact water heater comprises a cylindrical column having a plurality of heat exchange bodies disposed in the upper portion thereof, a spray nozzle disposed above the heat exchange bodies for discharging water thereon and a combustion chamber extending into the lower end of the column. A cooling jacket is mounted in surrounding relation to the combustion chamber and extends downwardly along the sides and around the bottom thereof. The cooling jacket is open at its upper end for receiving a portion of the water falling from the heat exchange bodies and has a discharge opening formed adjacent its upper periphery for discharging a portion of the collected water into a water tank below the column to effect circulation of the cooling water through the jacket.

Abstract: A hinge element consists of a tube connector attached to the end of a tube, the end of the tube connector having a notched head portion. Pivotably attached to the notched head of the connector is a bracket element having a spherically shaped, notched end which engages the ends of a spring and a limiting wire. The limiting wire and spring are attached at their other ends to a cross bar and a second tube in which the hinge element and the first tube may slide coaxially. A hand grip is also disclosed which consists of a central grip portion with two cylindrical parallel holes having slits on the outside thereof. At the outer edges of the slits are ribs which, when the outer portions of the grip are tightened, focus the compressive forces generated by the tightening toward the tube portions, thereby creating a strong frictional hold. The hinge and grip configurations are found in a bitubular orthopedic crutch having three sections.

Abstract: A corrosion protection system comprises a circuit which includes rectifiers connecting the structure being protected to an alternating current source for producing negative current flow from the source to the device. An impedance is connected in circuit with the rectifier and the structure and a control is connected to the rectifier for applying a voltage thereto which controls the electron current flowing through the impedance to the structure.

Abstract: A reducible walking aid is disclosed that incorporates three bitubular sections in slidable engagement with one another in the preferred embodiment. The first and third sections are connected via a pair of elastic cables attached to slidable, bidirectional hinge elements anchored to the near ends of the first and third sections, with the cables running through the tubular sections of the second section. To reduce the size of the walking aid, one pulls in opposite directions on the first and second bitubular sections. Once the hinges are generally clear of the second section, the first section is folded over the second section in one direction. The third section is folded in the opposite direction in a similar fashion to accomplish the complete folding of the crutch.

Abstract: A device for treating aqueous solutions with magnetic lines of force includes a pipe through which the solution passes. An electromagnetic coil surrounds the pipe and a core consisting of endwise connected alternating short sections of magnetic and non-magnetic material is disposed coaxially with and spaced from the pipe. Located between the pipe and the core is a helical baffle. A housing is spaced from and surrounds the coil. Air circulation vents are located at the upper and lower ends of the housing. Annular cooling fins extend outwardly through the coil with their outer peripheries terminating in the gap between the coil and the housing. A plurality of apertures are formed in the exposed outer portions of each cooling fin with the apertures of one fin being staggered relative to the apertures of the adjacent fins.

Abstract: An automatic, hydraulically actuated, sequencing valve for use with a pair of hydraulic acutators (e.g. double acting hydraulic cylinders) includes a valve body having a cylindrical bore therein. Cam members at either end of the bore are engaged by pins on the ends of a cylindrical spool, thereby rotating the spool 30.degree. each time it engages one of the cam members. A third cam member incorporated into the spool alternately locks open one of a pair of check valves as said spool is pressure shifted between the two bore cam members. The third cam member operates a locking system which permits only one of the two hydraulic cylinders to operate at a time and in sequence.

Abstract: Non-slip properties are imparted to molded plastic articles by adhering a layer of latex or a latex-impregnated sheet material onto the surface of the molded article. Preferably, the latex layer is applied prior to thermoset curing of the molded article and is adhered to the thermoset article during the curing process. The plastic may be reinforced, and the latex is preferably an acrylic latex impregnated into a sheet material such as cloth or paper.

Abstract: A liquid-filled polyurethane elastomer gel is fabricated from water, organic glycol and a polyisocyanate prepolymer. The prepolymer is formed from organic diisocyanate and organic diol or triol having a molecular weight of 3,000 to 10,000 and containing at least 40 percent by weight ethylene oxide adducts. The prepolymer is mixed with 3 to 20 times its weight of aqueous reactant including 25 to 65 percent by weight water and 75 to 35 percent by weight organic polyol. The resulting stable gel contains aqueous solutions of emulsions dispersed therein as small droplets comprising 75 to 95 percent of the weight of the resulting article. The liquid-filled polyurethane elastomer gel can be cast into shapes or can be formed into globs of random shape.