Abstract: Means for plating the inside of metal cylinders. A tube or pipe to be plated is mounted in a mounting which seals the ends of the tube. Oscillatable means mount an anode so that the anode extends through the tube. A pump circulates an electrolyte through the tube. A source of electricity connected between the anode and the tube. A brush is connected to the anode to scrub the interior surface of the tube as the anode oscillates, to provide a uniform surface.

Abstract: An adapter for adapting a mini tape recorder for transcribing control by a secretary. A mount is provided for the mini tape recorder. A solenoid in the mounting means is adapted to actuate the reverse wind control. A foot control has two contacts. One contact is connected to actuate the tape recorder in the forward direction and the other contact is connected to the solenoid to actuate the rewind control.

Abstract: Document conveying apparatus without roller contact on the documents. An upper chain is mounted on upper sprockets and a lower chain is mounted on lower sprockets. A plurality of equally spaced friction grip members are mounted on the chains so that the upper and lower grip members contact each other in the absence of a document. The leading edges of the documents are gripped by the upper and lower sets of grip members and the documents are conveyed by the chains without roller contact on the documents.

Abstract: An alloy for dentures with procelain caps which forms a good bond comprising 15 to 30% chromium, 30 to 60% nickel, 15 to 30% cobalt, 1 to 5% iron, and 1 to 2% beryllium. Another dental alloy comprises by weight about 22.2% Cr, 9.7% Co, 29.4% Ni, 29.4% Fe, 4.85% Al and 4.85% Mo.

Abstract: A heat storage tank suitable for solar house heating systems. The tank includes a rigidly supported bottom panel covered with a layer of stones of substantially uniform size which are bonded together thermally and mechanically at their points of contact with each other, but which have voids forming air passages remaining between them, bottom insulation below said bottom panel, a bottom air passage between the bottom insulation and the bottom panel, and at least one opening in the bottom panel whereby air can pass from said bottom air passage into said layer of stones.

Abstract: A reflecting solar heat collector. A stationary cylindrical receiver surface absorbs sunlight. An array of reflecting mirror strips are rotatably mounted in substantially parabolic arrangement having the receiver surface substantially at its focus. Motor means are connected for pivotally rotating said mirror strips substantially in unison about spaced-apart axes parallel to said receiver surface and substantially in said parabolic arrangement, to track the sun's apparent motion.

Abstract: An air-heating solar collector having a plurality of parallel, spaced-apart, substantially coextensive translucent sheets and a convoluted air passage passing in succession between successive pairs of said sheets, the air finally passing over a blackened absorber plate, whereby heat escaping from the absorber to the sheets is picked up by air flowing in the convoluted air passage.

Abstract: A feeder hopper for documents. A pair of guide rods are slidably mounted in a base member. A rear plate is mounted on the guide rods. A second plate pivotally and slidably mounted on one side of the guide rods. The plates are adapted to nest together. Means are provided to push back the rear plate back from the second plate when it is desired to add a new supply of documents to the hopper. The second plate holds the stack in position. After the new sheets are added the second plate is rotated out of the stack.

Abstract: A heat-conducting joint suitable for solar heat collectors. A tubular metal member carries heat-transfer fluid. A sheet metal member is in thermal contact with said tubular member and one of the members is pre-curved in a plane perpendicular to the surface of the sheet into a wave shape substantially consisting of a plurality of long radius arches joined by short radius cusps. Means are provided for first securing the other member while straight to the one member near its ends in a manner to prevent sliding of the other member on the one member. Means are provided for then securing said other member against the one member at the short radius cusps, whereby the two members are pressed together elastically along at least one line of contact for efficient heat conduction between them.

Abstract: Non contaminating stopper remover means for removing test tube stoppers of the type having a center portion extending into the test tube and an upper portion having a continuous edge over the edge of the test tube stopper remover. A hollow cylindrical member has an open end adapted to fit over the stopper inserted in the test tube. The stopper remover may have an inwardly extending rim or binding surface adapted to fit the extending upper portion of the stopper so that the stopper may be removed by slipping the stopper remover over the stopper and squeezing, pulling or bending to one side of the test tube. The stopper remover is longer than the stopper so that when the stopper is removed any contamination by the stopper is prevented.

Abstract: A hand scrubber having a hollow base member with a motor mounted therein. A drive dog is connected to the shaft of the motor. A hollow washing container is removably mounted in the base. The container has a driven dog meshing with the drive dog, and a brush connected to the shaft of the driven dog. The container has an aperture in its front so that a hand may be inserted into contact with the rotating brush.

Abstract: Adapter for installing, inside a building wall, a vending machine coin box of the type normally mounted outdoors. The coin box is mounted on the inside of the wall, the coin box having a coin receiving aperture, a coin return slot and a coin return lever. A first chute is mounted in the wall and connected to the coin receiving aperture, the first chute extending downwardly from the outside of the wall. A second chute is mounted in the wall connected to the coin return slot, the second chute extending downwardly from the inside to the outside of the wall. A coin return bar extends through the wall and connected to operate the coin return lever, whereby the coin box is protected from vandalism and burglary.

Abstract: A heat transfer block has a center core of substantially equally sized stones. The stones are grouted together with voids in between. Upper and lower panels are grouted to the center core. At least one of the panels is a heat transmitting panel. A plurality of heat transfer blocks may be laid end to end to form a heat transfer duct. A building air heating system may comprise a plurality of heat transfer blocks connected together, a means of circulating air through the blocks, and a heat reservoir connected to the outer surface of said heat transfer blocks.

Abstract: A heat and moisture exchanger consists of a folded sheet of water permeable paper having a plurality of folds. Separators are placed between said folds to provide air passages. Air is directed in one direction through the folds on one side of said folded paper. The return air flows in the opposite direction through said folds on the other side of said folded paper. Water and heat are transferred through the paper from one air stream to the other air stream flowing in the opposite direction.

Abstract: In a solar heat collector. A shallow hollow member. A transparent cover for said member. A plurality of load bearing partitions in said hollow member. A plurality of heat collecting plates are spaced between said partitions. A plurality of water pipes are each connected along one of said collector plates and the water pipes are connected in parallel. Inlet and outlet water pipes means are connected to the parallel connected pipes. The outlet pipe connection has an expansion loop to compensate for temperature variations. Vacuum is applied to the hollow member. The partitions are proportioned and spaced so as to support the cover against external atmospheric pressure. Conduction and convection losses from said heat collector plates are minimized because of the vacuum.

Abstract: Connecting means to connect first and second printing presses in tandem. A support member is mounted on a first printing press. A curved plate is mounted on said support member, said plate bridging the gap between an output of the first printing press and the input of a second printing press.An endless belt is mounted on said support member over said curved plate and runs in contact with said curved plate. One of the printing presses is connected to drive the belt the same linear speed as the linear paper feed speed of the printing presses.

Abstract: A solar heat collector. A thin evacuated tank has upper and lower parallel sides, the upper side having a black exterior surface, the tank being mounted at an angle to the horizontal. A small amount of vaporizable fluid is contained in the tank. A fluid conduit is connected in heat exchanging relation with the upper end of the tank. Solar rays striking said upper tank surface will vaporize the fluid in the tank and the vapor will flow to the upper portion of the tank where it will be condensed and transfer its heat to fluid in the conduit.

Abstract: Adjustable means for fastening heavy precast concrete panels for walls or floors, structural concrete beams, girders, and machinery to foundations vertically, horizontally, or in any plane. An internally threaded hollow member is anchored to a panel member which is to be mounted on a supporting structure with bolts; the member having numerous fastening points designed into it. Alternatively, the hollow member is placed into a foundation so machinery can be bolted down. An externally threaded hollow member which can rotate through 360.degree. is mounted in the threads of the first hollow member, and is axially adjustable therein, the second member having a tapering hollow interior keyway space extending perpendicular to the axis of the second member. The upper three-quarters of the tapered keyway sides have fine thread-like striations and a tapering internal threaded nut fits into the hollow tapering space, the nut having corresponding striations on its tapering sides.

Abstract: A cold storage tank is mounted in a pit in the ground. An outer plastic sheet barrier lines the pit. A lining of incompressible insulating material lines the interior surface of the outer barrier. An inner plastic sheet barrier lines the interior surfaces of the insulation. A plurality of bags of fresh water are mounted inside of the inner barrier. Brine and gravel fills the inner barrier and the voids between said fresh water bags and covers the fresh water bags. An out-take pipe extends into the brine and is connected to a pump. A shallow tray is mounted above ground and the out-take pipe is connected to spray the brine onto the tray during freezing weather. An intake pipe is connected to drain the tray and return the cooled brine to the interior of the inner barrier. The brine surrounding the water bags is circulated through a heat exchanger for cooling air when required.

Abstract: A heat storage tank is mounted in a pit in the ground. The pit preferably has four sides and a bottom. A lining of insulating material mounted against the sides of said pit. A water impervious liner tank is mounted against the insulation. A top rests on the contents of the tank. At least one insulating barrier extends down from said top to a point adjacent the bottom of said tank, the barrier dividing said tank into portions. Heat storage material substantially fills the tank. The heat storage material has sufficient voids to permit circulation of heat transfer liquid. A hot liquid intake pipe extends adjacent to the bottom of the tank in the center portion. A cool liquid out-take pipe extends adjacent to the bottom of said tank in a side portion. A heat exchanger is located in the upper center portion of the tank.