Abstract: An automatic floor cleaning machine includes a unitary, self-contained and propelled, power driven body mounting from front to rear in a normal cleaning direction of travel: a propulsion mechanism including drive wheels and guide wheels for dry tracking on the floor surface to be cleaned, a scrubber mechanism including a pair of rearwardly disposed, vertically articulated counter-rotating magnetically and floatably mounted brushes for wetting and cleaning such floor surface, a vacuum mechanism including a vertically and horizontally articulated quick-detachable squeegee for drying of and proper tracking on the cleaned surface, and a combined mechanical and electrical control system operatively associated with each of such propulsion, scrubber, and vacuum mechanisms, for convenient actuation by a walk-behind operator to control actuation of such machine.

Abstract: A zinc-rich electrostatic powder is prepared comprising zinc incorporated homogeneously in an epoxy resin powder.

Abstract: A deflector comprising a stem portion and a deflecting body portion for protecting a roadway expansion joint. The stem portion anchors the deflector in an operating position in which the body portion deflects snow plow blades and the like upwardly away from the expansion joint.

Abstract: A machine for dispensing a doughy substance comprises a container capable of receiving gas under pressure and an outlet through which the doughy substance can be pushed on subjecting it to the pressure of the gas in the container. A rotor is disposed adjacent the outlet of the container and has a cavity in its external periphery. On rotation of the rotor, the cavity is capable of being brought into a position of alignment with the outlet to be filled with doughy substance pushed through the outlet. Further rotation of the rotor moves the cavity away from the outlet to a position at which the doughy substance can be released from the cavity, for example, by application of compressed gas to the base of the cavity through passages provided in the rotor. The container may comprise an arrangement for kneading the dough and may be provided with a blocking member to prevent passage of doughy substance through the outlet during the kneading operation.

Abstract: When plate heat exchangers are used with hazardous fluids the gasketing at the periphery may be replaced by welding the plates in pairs, with elastomeric gaskets between adjacent packs of plates. However, it is still necessary to have a gasket around the through holes (6) for the hazardous medium to seal them from the other medium. In accordance with the present invention, these gaskets are of duplex form (8, 9) with a sealed space (11) between the gasketing. In order to detect leakage into the sealed space a diluent fluid may be circulated through the sealed spaces and a detector, refer to FIG. 2.

Abstract: An electrostatic detector comprising a detector electrode sensitive to electrostatic quantities such as fields, voltages, charges and the like, means for varying the capacitive coupling between the electrode and an electrostatic quantity to which the electrode is exposed, and an operational amplifier having an output and a pair of inputs, one of which is operatively associated with the amplifier summing node. A resistive feedback path is defined between the amplifier output and the summing node, the detector electrode is connected to the one amplifier input so that the detector electrode is operated directly into the amplifier summing node, and the other amplifier input is connected to an electrical reference, such as ground. As a result, the detector electrode is held at virtual ground and the amplifier is operated as a current to voltage converter to cause an output voltage to be generated equal to the product of the input current and the resistance of the feedback path.

Abstract: A floor cleaning machine having drive wheels, scrub brushes, and cleaning liquid applying and pick-up means. The machine has a drive train including a drive motor, a drive axle assembly and the drive wheels. The drive train is mounted on a removable carriage which is slidable laterally of the machine while the latter is in operating position, to provide access to the drive train for maintenance and repair.

Abstract: An expansion joint seal for closing a gap between spaced-apart structural members has an elongated body including longitudinal side edges, an upper corrugated treadway surface, a lower undersurface, and an internal web structure including a plurality of laterally spaced vertically disposed webs each having an upper pair of cross-bars extending upwardly and outwardly therefrom and connected to the upper treadway and a lower pair of cross-bars extending downwardly and outwardly therefrom. An additional lower cross-bar extends from each side edge downwardly and inwardly to a pair of curved surfaces, and a vertically disposed web extends between the juncture of the curved surfaces and the centermost cross-bars. An upper cross-bar extends upwardly and inwardly from each side edge to the upper treadway surface.

Abstract: An improved retainer for an expansion joint system and a sealing cap for the anchor bolt channel thereof. The retainer channel and the cap have complementary mating profiles in the form of ledges with inclined edges and inwardly offset grooves having sloped bottom surfaces on the retainer channel walls, the cap having laterally projecting upper edge portions defining ledge receiving grooves and sloped bottom edge surfaces whereby entry of the cap into the retainer channel is facilitated by coaction between the sloped bottom surfaces of the cap and the inclined edges of the retainer ledges. The retainer ledges mate with the cap grooves to lock the cap in the retainer. The sloped bottom surfaces of the cap are supported by the sloped bottom surfaces of the retainer grooves and the laterally projecting upper edge portions of the cap are supported by the upper surfaces of the retainer ledges, the surfaces being in sealing engagement.

Abstract: An elongated, hollow, game stick handle for hockey sticks, or the like, and formed from a plastic material, the handle having a substantially rectangular cross-section. The outer and inner surfaces are arcuately shaped for increased strength and improved fracture resistance. The side walls and corners are of non-uniform thickness and the minimum wall thickness of the shorter sides is greater than the minimum wall thickness of the larger sides, while the maximum wall thickness of the corners is greater than the minimum wall thicknesses of the shorter or larger sides.

Abstract: A container made of synthetic material and comprising two compartments, one containing the liquid or other matter the container is to carry, and one, of smaller volume, containing a gas under pressure. The smaller pressurized container rigidifies the structure and may be shaped in such a way as to form a handle or grip for the container. A process and apparatus for manufacturing and filling rows of such containers is also disclosed, said process involving forming a strip of synthetic material into the shape of a letter W in transverse section and performing various welding operations on the strip to form individual containers and to divide off the two compartments.

Abstract: A method and apparatus for teaching the relationship between the conventional musical staff and the tone-producing elements or keys of a barred or keyboard type instrument. The apparatus includes an elongated base member having a planar surface on which a replica of a portion of a conventional musical staff consisting of at least five parallel lines is depicted. Each line positioned on the base member is separated from the next line by a distance essentially equal to the width of two tone-producing elements on the instrument. A plurality of cover strips fabricated out of releasable material having a width equal to the width of a single key are superimposed over the lines on the base member in overlying relationship to the lines to provide alternating and parallel covered and uncovered areas of substantially equal width.

Abstract: A sleeve and mitten combination for jackets or similar outerwear, chiefly for children, comprises a sleeve formation terminating in a tubular mitten-formation which comprises an extension of the sleeve formation. A slide fastener extends across the outer end of the tubular mitten-formation and when the fastener is closed the wearer's hand is fully enclosed. When the fastener is opened, the mitten-formation may be turned back upon the sleeve formation to form a cuff and more or less fully expose the wearer's hand.

Abstract: A film of organic electron donor material is formed to a predetermined thickness and shape and then the preformed film and a lithium element are pressed together in a manner bonding the film to the surface of the lithium element to form a coated lithium anode. During the pressing operation, the surface of the lithium element can be shaped to include formations such as corrugations which serve to increase the surface area thereof, and the pressure bonded film is of substantially uniform thickness over these formations. The resulting coating also is substantially free of voids so as to be of substantially uniform solidity. An entire coated anode assembly is formed in one pressing operation, so that bare lithium is not subjected to prolonged atmospheric exposure which, in turn, reduces or substantially eliminates the possibility of nitride formation on the surface of the lithium element which is coated simultaneously while being pressed.

Abstract: A container capping apparatus having a generally vertical tubular spindle carrying a cap holding chuck assembly is rotatable about its axis to apply a screw cap to a container with predetermined force. A control rod is vertically movable within the spindle against an actuator spring to release the applied cap from the chuck. An axle carried by the control rod projects through vertically elongated slots in opposite sides of the spindle, and is received in a control collar slidable on the spindle. A cam follower is carried by a yoke vertically slidable on the spindle and an external adjusting nut is carried by the yoke for movement therewith in operative engagement with the collar. The vertical position of the nut relative to the yoke is selectively adjustable, thereby to adjust the position of the control rod relative to the cam follower.

Abstract: A method and apparatus for separating particulate matter from a gas stream wherein dirty gas is moved first through a corona discharge zone, such as that provided by a plurality of rod-like electrodes each having a sharp-edged corona producing ribbon-like formation extending axially therealong, and then is moved through a plurality of mechanical filters of the cartridge type, each comprising a perforated, cylindrical, metal outer shell and an inner filter medium of foraminous dielectric material such as pleated paper. Each cartridge is closed at one end and open at the other from which cleaned gas flows out axially. The electrodes are located circumferentially of the filters with the filter and electrode longitudinal axes being substantially parallel.

Abstract: A first support member having a web with a slot therein and a second support member having a web provided with an integral locking connector extending axially therefrom for insertion in the slot. The connector has a snap locking finger provided with an edge inclined relative to a true vertical for positive locking engagement against one side of the first support member web. Interlocking means are provided on the opposed faces of a pair of second support member connectors inserted through the slot for locking the second support members against axial separation.