Abstract: An enclosed portable container for gravel and dust in a vacuum cleaning system, provided with at least two cyclone air cleaners, having a clean out door, and each cyclone is provided with its own clean out door, is skid mounted for pick up and carry to dumping areas, reducing the handling of collected dirt, gravel and dust. The separate air pump assembly provides motivating power for the vacuum cleaning system.

Abstract: A tubular inserter/extractor and a packet of down. The packet includes a tubular, film package permanently sealed at one end, and at the opposite end has two elongated tabs extending beyond a releasable seal. The packet is placed in the tubular inserter/extractor and the two tabs are pulled backward along the extractor, after opening the packet by the releasable seal, to turn the packet inside-out and release the down contained in the packet.

Abstract: An open top housing member, the top being arranged to be closed by a solar radiation transparent covering, is arranged to be mounted in side by side and end to end relationship with similar members to provide a large area solar heat absorber unit, and each housing member includes passageways for the flow of fluids, such as air, and means for joining the members at the passageways, thereby providing an inlet fluid manifold at one edge of the combined housings and an outlet fluid manifold at the opposite edge of the housings providing the transfer of heat absorbed by the unit to the transfer fluid. Generally, the housing members are made of lightweight sheet metal and may be secured together either by crimping edges and flanges of adjoining members or lateral mechanical pressure at the passageways, and each is provided with an adjustable gate member for varying the flow pattern of the fluid through each individual member.

Abstract: An assembly jig for fabricating wooden trusses including a moving jig platform on which toothed metal gusset plates are placed; wood truss component members assembled with each joint of the wooden member placed over the plates, toothed metal gusset plates placed on the upper side of each joint, and a series of three sets of small diameter pressure rollers press the plates flush into the wooden members when the moving jig platform moves the truss through the pressure rollers. A slide plate between the first two sets of small diameter rollers prevents curling of the plate partially pressed into wood members passing therethrough, and the third set of rollers completes the embedding of the teeth in the truss.

Abstract: An oil mist and solid particle laden gas from an oil shale retorting operation is initially treated with a temperature controlled oil spray and then by a coalescer to reduce the quantity of oil mist and remove most of the solid particle content of the gas stream and then finally treated by an electrostatic precipitator to essentially remove the oil mist remaining in the gas.

Abstract: An innocuous purified extract of Sanguinaria canadensis is compounded at from 0.1% to 40% with a suitable paste or a liquid to be used in an oral cavity for cleaning teeth, refreshing the cavity, and conditioning the fleshy parts of the cavity.

Abstract: An L-shaped channel, for mounting on the lower outside corner of a door, and an adjustable lateral floor brace, for holding an unhinged door upright.

Abstract: A piston type air pump, for forced lung ventilation, with a variable length of stroke and a variable timing of inspiratory and expiratory phases. The pump includes a stepless change, variable radius crank arm, controllable during pump operation for changing the volume capacity of the pump. The drive motor is arranged for movement for varying the timing of piston in-movement to the piston out-movement for varying the time ratio of inspiration to expiration.

Abstract: A sheet or film of cover material having a flotation member around the peripheral edge, with the cover material being cut to the size and shape of the surface of the pool to completely cover the water of a swimming pool. In one form, a flotation member is a foamed plastic cylinder encased in a waterproof sheath which is attached to a pocket formed in the sheet periphery.

Abstract: A hinged frame, having attachment straps for mounting the frame on the inside of a user's elbow, and a drop lock which permits an initial bending of a user's arm then locks the arm straight on the user straightening his arm for bowling ball delivery.

Abstract: Four bar clamps arranged with slots in the bars interlock to form a rectangular clamping assembly for holding rectangular and box-like members in position for glueing. The bar clamps include adjustable length means between a fixed pressure pad and threaded adjustable pressure pad.

Abstract: A pipe, having a vulcanized, elastomeric liner within it, is finished off with a bushing at each end, the bushing being within the liner with its end being outwardly flared, as a bell mouth, to completely confine the end of the liner between the bushing and pipe. An unvulcanized elastomeric liner, characterized by a slight increase in volume when vulcanized, is used with the liner portion between the pipe and liner producing a very tight fit due to such expansion.

Abstract: A fitting for connecting conduits to ductboard and other walls, including a short length of pipe having a seating bead and attached spring clips for securing the fitting to a bore in a ductboard, with the spring clips holding the ductboard against the bead.

Abstract: Glass cutter (or scoring) apparatus for hand usage adapted to facilitate a preferred cutting procedure wherein the glass to be cut is itself moved with respect to a stationary cutter or stylus to provide a desired score line. A glass cutter that may have a cutter wheel or stylus is supported above a glass receiving table by a cutter support arm that extends forwardly from a fulcrum support. A force that may be adjusted is applied to the arm to hold the cutter engaged with the glass, and the glass is then moved in a hand guided or mechanically guided pattern to score the glass. Guide fence and pivot elements are provided for non-freehand specialty uses. The cutter may be moved to adjusted positions of varied distance and angularity to facilitate operations, and in one preferred embodiment the cutter support arm itself may be moved reciprocally to facilitate conventional glass cutting procedures wherein the cutter is moved with respect to the glass being cut.

Abstract: A structure or building with a solar energy collecting system in an upright wall, arranged to face the sun, has a heat storage unit adjacent the wall for storing heat absorbed by the collecting system in sunlight, and for releasing the heat to the interior of the building in the absence of sunlight during those seasons requiring additional heat for the building, and a solar heat collector system for the building is arranged to provide a chimney effect for circulating air through the structure during seasons when heating of the structure is not desired.

Abstract: A lightweight, take-down beam form, including a series of U-frames held together by spaced apart adjustable longitudinal braces secured along the frame uprights and bottom longitudinal braces, support strippable plywood or plastic or suitable material beam forming sheets. The U-frames are bolted together for easy and quick assembly and easy disassembly when in place on a cured concrete beam, permitting easy release of the forming sheets from completed and cured concrete beams. For normal use, the form strips from a set beam as a modular unit. For some purposes, such as for spandrels, one or both sides could be released for the removal of the form.

Abstract: Hot, non-oxygenous gas at carefully controlled quantities and at predetermined depths in a bed of lump oil shale provides pyrolysis of the contained kerogen of the oil shale, and cool non-oxygenous gas is passed up through the bed to conserve the heat inventory for a viable process. The bed being fed at the top with raw shale and retorted shale being removed at the bottom provides a constant depth, continuously moving bed of shale, for a continuous process.

Abstract: A vertical vessel, having a low bed of broken material, having included combustible material, is initially ignited by a plurality of ignitors spaced over the surface of the bed, by adding fresh, broken material onto the bed to buildup the bed to its operating depth and then passing a combustible mixture of gas upwardly through the material, at a rate to prevent back-firing of the gas, while air and recycled gas is passed through the bed to thereby heat the material and commence the desired laterally uniform combustion in the bed. The procedure permits precise control of the air and gaseous fuel mixtures and material rates, and permits the use of the process equipment designed for continuous operation of the vessel.

Abstract: A connection across telephone lines includes a resistor having a shunted capacitor circuit holding a normally closed relay open and permitting it to close on closing the telephone circuit, by lifting the handset, to activate a recorder. Replacing the handset opens the circuit shutting off the recorder. A current limiting resistance in the recorder switch circuit prevents damage to the relay while the capacitor provides high current for activating the the relay solenoid. A bridge circuit eliminates polarity of the magnetically biased relay.

Abstract: A two-way telephone amplifier uses a microphone-speaker switching system with the microphone normally on. Incoming or off-line voice signal causes switching to open the transmit line and close the receive line. Features of the invention include a bridge circuit with transmit and receive lines all connected to one side of the secondary of a telephone line coupling transformer.