Abstract: A walker that has wheels to facilitate its movement when it is not being relied upon as a primary means of support and that has brakes to hold said wheels against rotation when it is. The wheels are arranged in a tricycle configuration and brakes are associated with the two rear wheels. A pair of brake pads flank each wheel and are held into braking relation to each wheel by a pair of spring members, there being one spring for each brake, when little or no weight is applied to the walker by the user. The springs are compressed and the wheels are free to rotate when the weight of the user is applied to the walker. The user's forearms rest in padded armrests and hand grips are provided forwardly of those arm rests. The walker is adjustable in height and is foldable when not in use.

Abstract: A surface buoy. The buoy includes top and bottom flotation members of hemispherical configuration and a reel member positioned between them. An elongate flexible cord is coiled about the reel member and has a first end secured thereto. A second end of the cord is secured to a weight member. The top flotation member has a nest-like recess formed therein into which the weight member is positioned when the buoy is not in use. When the buoy is tossed into a body of water, the bobbing action of the buoy throws the weight out of its nest and into the water. As the weight sinks, it uncoils the cord from the reel member until it reaches the bottom of the body of water, at which time further uncoiling of the cord stops.

Abstract: A seatbelt construction that includes parallel, vertically aligned strap members that tightly overlie the back part of a seat. The vertical strap members are spaced about shoulder width apart and are interconnected by a third strap member. In a first embodiment, the third strap is horizontally disposed at any preselected height along the extent of the parallel strap members. In a second embodiment, the opposite ends of the third strap are pivotally connected to the parallel straps so that the third strap can be angled from the horizontal when interconnecting the parallel straps. Both embodiments safely secure the passenger without relying on lap belts.

Abstract: A disposable, double-edged rotor knife and a disposable, double-edged bed knife for use in plastic granulating machines. The rotor knife has a general "Z" shape and is held in sandwiched engagement to the rotor of the machine by a clamp that has a wedge shaped bottom. The clamp wedges the rotor knife into a wedge shaped channel formed in the rotor when a bolt that does not pass through the rotor knife is tightened. In one embodiment, the longitudinal axis of the bolt is parallel to a plane normal to the axis of rotation of the rotor, and in a second embodiment a ten degree angle is formed between the axis of the bolt and the plane. The bed knife is keyed to the machine.

Abstract: A hand held tool about the size of a conventional screwdriver that facilitates the installation and removal of circuit board test points. A first socket member at the distal end of the tool engages the outer part of a test point and a second socket member in axial alignment with the first engages the inner part of the test point. The first socket member has an inner diameter greater than the outer diameter of the second socket member so that the second socket member is retractable into the first when the outer and inner parts of a test point are simultaneously engaged by the first and second socket members, respectively. A spring maintains the second socket member forwardly of the first socket member when the tool is not in use. The socket members are independently rotatable under the control of separate handle members.

Abstract: The density of a caustic liquid is reduced by automatically adding water to the caustic when the specific gravity of the caustic is unacceptably high. A small stream of water is continuously directed over the head of a specially designed hydrometer. As long as the density of the caustic is within acceptable ranges, the stream of water flows uninterrupted over the head of the hydrometer and has no effect on the caustic. However, when the density of the caustic rises to unacceptable levels, the hydrometer rises and its head intercepts the stream of water and deflects it downwardly into the caustic, thereby diluting it. When sufficient water has been added to the caustic to bring its density back to acceptable levels, the hydrometer sinks and the water resumes flowing over the hydrometer to a collection station where it is recycled.

Abstract: A cryogenic refrigeration apparatus that re-liquifies boiled off cryogenic gases and returns the cooled, re-liquified gases to the cryogenic load. Reciprocation of a driver piston effects simultaneous and corresponding reciprocation of compressor and expander pistons. A magnetic sensor senses the position of the driver piston when at its top dead center position, its bottom dead center position, and a position about half way therebetween. Signals corresponding to the sensed position of the driver piston are sent to a logic control unit that governs the opening and closing of valves throughout the apparatus.

Abstract: A combination pick-up truck bed liner and camper top. A bed liner conforms to the contour of a pick-up truck's bed and protects the bed from deterioration due to rust, abrasion and other damage of the type often inflicted upon unprotected truck beds. The bed liner is releasably secured to the bed and is made of light in weight materials so that it can be inverted and used as a camper top.

Abstract: A safety device that restrains very small children to a shopping cart seat and that serves as a harness when the child is not seated in the seat. A middle strap member overlies the child's stomach and wraps around part of the back of a shopping cart seat. The opposite ends of the middle strap member are releasably fastened together behind the child's back. A pair of shoulder strap members are secured at a first end to the middle strap member and overlie the child's shoulders. A second end of each shoulder strap member is fixedly secured to a flat material that is looped to carry a pair of large "D" ring members to which is releasably secured a bottom strap member that extends from the middle strap member, under the shopping cart seat, to the "D" ring members to unite the shoulder strap members to the bottom strap member. A tether member is secured to the device to harness the child when the child is not in the shopping cart seat.

Abstract: A machine that takes screws out of a hopper and delivers them to a screw driving station where they are driven by motor operated screw driver members to secure a hinge to a door and a jamb. Inside the hopper, a screw lifting member engages, lifts, aligns and delivers individual screws to a hopper discharge station. Pressurized air blows the screws from their respective discharge stations onto tracks, there being one track associated with each discharge station. Elongate transfer tubes positioned at the discharge end of the tracks deliver the screws to a movable head member which upon receiving a charge of screw members moves downwardly and inwardly to a fixed position screw driving station where a door and jamb are positioned. Screw driver members are brought into driving relation to associated screws by horizontally inward movement of a motor that rotates the screw driver members.

Abstract: A machine that takes screws out of a hopper and delivers them to a screw driving station where they are driven by motor operated screw driver members to secure a hinge to a door and a jamb. Inside the hopper, a screw lifting member engages, lifts, aligns and delivers individual screws to a hopper discharge station. Pressurized air blows the screws from their respective discharge stations onto tracks, there being one track associated with each discharge station. Elongate transfer tubes positioned at the discharge end of the tracks deliver the screws to a movable head member which upon receiving a charge of screw members moves downwardly and inwardly to a fixed position screw driving station where a door and jamb are positioned. Screw driver members are brought into driving relation to associated screws by horizontally inward movement of a motor that rotates the screw driver members.

Abstract: A machine that takes screws out of a hopper and delivers them to a screw driving station where they are driven by motor operated screw driver members to secure a hinge to a door and a jamb. Inside the hopper, a screw lifting member engages, lifts, aligns and delivers individual screws to a hopper discharge station. Pressurized air blows the screws from their respective discharge stations onto tracks, there being one track associated with each discharge station. Elongate transfer tubes positioned at the discharge end of the tracks deliver the screws to a movable head member which upon receiving a charge of screw members moves downwardly and inwardly to a fixed position screw driving station where a door and jamp are positioned. Screw driver members are brought into driving relation to associated screws by horizontally inward movement of a motor that rotates the screw driver members.

Abstract: A machine that takes screws out of a hopper and delivers them to a screw driving station where they are driven by motor operated screw driver members to secure a hinge to a door and a jamb. Inside the hopper, a screw lifting member engages, lifts, aligns and delivers individual screws to a hopper discharge station. Pressurized air blows the screws from their respective discharge stations onto tracks, there being one track associated with each discharge station. Elongate transfer tubes positioned at the discharge end of the tracks deliver the screws to a movable head member which upon receiving a charge of screw members moves downwardly and inwardly to a fixed position screw driving station where a door and jamb are positioned. Screw driver members are brought into driving relation to associated screws by horizontally inward movement of a motor that rotates the screw driver members.

Abstract: A combination pet grooming brush and medication dispenser. A hand-holdable base member has a hollow upper chamber for the retention of liquid medication and air and has a solid lower portion having a passageway with plural branches formed therein. The passageway has a first end, confluent with the hollow chamber, that serves as a drain; the passageway splits into plural branches, each of which is confluent with a hypodermic tube. The tubes extend in parallelism with bristle members from a mounting plate releasably secured to the bottom of the base member. A rotationally mounted and axially displaceable spring-loaded valve member opens the passagway to fluid flow when properly rotated and depressed and closes the passageway when released. Air pressure provides the motive force for fluid flow and is supplied by a squeeze bulb confluent with the hollow chamber and separated therefrom by a check valve. A pressure relief valve formed in the hollow chamber ensures against over-pressurization.

Abstract: A wrench of the type having two handle members pivotally connected to one another at a pivot point. Each handle member terminates in a jaw member. Advancing a screw member causes one of the handle members to rotate about the pivot point so that the jaw members are brought together. A pair of slots translate the rotating motion of the handle member about the pivot point into linear components. The jaw members at the end of each handle are biased apart from one another by a spring, but the bias may be overcome by squeezing the handle or by advancing the screw member. When the screw member is fully retracted, the spring separates the jaw members. When the spring member is advanced, it prevents separation of the jaw members.

Abstract: A machine that takes screws out of a hopper and delivers them to a screw driving station where they are driven by motor operated screw driver members to secure a hinge to a door and a jamb. Inside the hopper, a screw lifting member engages, lifts, aligns and delivers individual screws to a hopper discharge station. Pressurized air blows the screws from their respective discharge stations onto tracks, there being one track associated with each discharge station. Elongate transfer tubes positioned at the discharge end of the tracks deliver the screws to a movable head member which upon receiving a charge of screw members moves downwardly and inwardly to a fixed position screw driving station where a door and jamb are positioned. Screw driver members are brought into driving relation to associated screws by horizontally inward movement of a motor that rotates the screw driver members.

Abstract: A page turning device. Ferrous flat plate members are detachably secured to the pages to be turned of a book. A magnet member is carried by an elongate arm member that is pivotally mounted to swing in a plane. In a first embodiment, a spring member under load urges the arm member to swing in its plane to an equilibrium position, carrying a magnetically-engaged flat plate member and hence a page member with it. A stop member maintains the arm member in its nonequilibrium position until the musician desires the page to turn; a latch member is activated to transiently displace the stop member from its stopping engagement with the arm member. The musician thereafter returns the arm member to its first position. In a second embodiment, a motor causes the arm member to swing in its plane, carrying one page with it each time it travels from its first to its second position.

Abstract: An apparatus and method for applying cellulose fiber insulation of the spray on loose fill type. The insulation is coated by a dry and thus deactivated adhesive and is stored in a storage tank. At the moment it exits the storage tanks, the insulation is exposed to and moistened by water sprayed by a nozzle member. The moistened insulation travels the length of a blow hose to reach the application site at the discharge end of the blow tube. The moisture activates the dry adhesive as the insulation travels through the hose, and the turbulence within the hose ensures that all of the fibers are moistened. Thus, by the time the adhesive is discharged by the blow tube, it sets in the absence of dust and virtually no setting time is required because the activated adhesive has begun to set.