Abstract: A wire mesh band or belt with mutually crossing warp wires and weft wires for a conveyor system with grooved support rollers is provided with downwardly extending protrusions. The protrusions are warp wire free providing great flexibility for the band in the longitudinal direction. The protrusions can be formed in all the weft wires or only in selected strengthened weft wires with the remaining weft wires woven into the fabric after the protrusions are formed.

Abstract: A hermetically sealed housing provides an enclosure for low and high pressure gaseous fuel vapor chambers and for a liquid fuel receiving reservoir which receives liquid fuel such as gas from the fuel tank of a vehicle. The reservoir has a vapor space above the liquid fuel therein, and a pair of vacuum operated pumps serve to pump vapor from the vapor space sequentially to the low and high pressure chambers. Check valves are provided to prevent backflow of gaseous vapor toward the vapor space, and the high pressure chamber is provided with an outlet connectable to the air induction passage of an internal combustion engine for delivering gaseous vapor thereto. The outlet from the high pressure chamber is connected to the air induction passage through a pressure regulator valve and throttle valves which are closed when the engine is shut down so that vapor is maintained in the second chamber at the high pressure thereof when the engine is stopped.

Abstract: In a timer or counter for timing to a selected time or counting to a selected count, there is included digital counting means and means for creating an output signal when the counting means counts to a selected number. In this type of device, there is further provided a plurality of two state indicator elements and means responsive to the counting means for changing the state of one of the elements after the timer or counter has progressed through each of several, preselected portions of the selected number being counted.

Abstract: A gantry scraper for the clearing of dumps which can function in closed buildings and can clear substantially the entire area under the scraper. A vertically swingable scraping jib is provided in combination with a tensioned clearing rope or the like which extends upwardly and at an angle to the adjacent beam of the scraper jib, which clearing rope contacts bulk material beyond the end of the jib and knocks the material down to where it is accessible by the jib.

Abstract: An automatic presettable welding system which enables the user to preset the arc voltage and wire feed speed to precise predetermined values without either energizing the wire with arc voltage or initiating the wire feed. A meter is supplied with an appropriate signal so the readout corresponds to the desired wire feed speed or the desired arc voltage and these same signals are supplied to wire feed speed or arc voltage comparative circuits which then function to energize a wire feed motor or an arc welding power source to the precise wire feed speed or arc voltage indicated on the meter. Means are provided for controlling the acceleration of the wire feed drive motor and a controlled initiation of the arc voltage at the beginning of each weld. Overload, over-voltage and under-voltage or over or under wire feed speed and other protective circuits are provided with appropriate delays in the functioning thereof to insure fully automatic and satisfactory welding.

Abstract: An apparatus for arc welding of a pair of spaced steel plates from one side only using a grooved back-up plate which gives a good weld bead shape on the under side, gives high linear welding speeds, and avoids contamination of the deposited weld metal by the metal from the back-up plate. A pair of consumable electrodes connected in electrical series between the output terminals of the power source and with one connected by an independent connection to the workpiece are advanced into the weld gap on lines of movement which intersect at a point above the lower surfaces of the plates so that an arc is maintained between the electrodes spaced from the base of the back-up plate groove. A separately energized electrode trails the first two electrodes and deposits a weld bead on the first deposited weld metal while it is still hot.

Abstract: An arrangement for modifying a plow blade power unit of the type positioned between the mounting frame on the front of a vehicle and a plow blade lift arm, to a unit for creating pressurized fluid from a remote location. Modification enables a basically similar power unit to be utilized in both remote and direct operational environments with only minor substitution of interchangable parts. A piston-cylinder unit which enables direct lifting of a plow blade is replaced by a modified, but similar, cylindrical element for use in indirect lifting of a plow blade by fluid under pressure.

Abstract: A system for creating a control reference signal for a remote electrical servo device having a movable output unit wherein the velocity and position of the output unit are controlled by the vector magnitude of the control reference signal. This system includes a digital circuit for creating a first fixed analog signal indicative of a known or desired velocity for the unit during a preselected controlled time interval and a second digital means for creating a desired time base positional profile during the preselected time interval. An encoder arrangement is employed for detecting the actual time base positional profile of the servo output unit during the given time interval so that an analog signal generally proportional to the algebraic difference between the actual and desired time base positional digital profile can be created at various times during the time interval.

Abstract: A fork lift mechanism is associated with apparatus for palletizing long sheets of strip material at the discharge end of a shearing press. The long sheets are palletized on an underlying conveyor having a width corresponding to the length of the sheets in the direction of discharge from the press. The fork lift mechanism is supported above the conveyor for displacement toward and away from the shearing press in the direction of the discharge and is adapted to be elevated and lowered relative to the conveyor. The fork lift mechanism is operable to receive and support a plurality of short sheets from the press to form a stack on the fork lift mechanism and to position a plurality of such stacks on a pallet on the conveyor and in side-by-side relationship on the pallet in the direction of press discharge and/or in the direction of conveyor movement.

Abstract: A spacer bar and spacer for prepackaged food freezers of the multiple flat plate type which enables the spacing between the plates to be quickly changed to accommodate different thickness food packages. The spacer bar has a plurality of pairs of parallel sides, each pair being spaced a different predetermined amount whereby, by selectively rotating each spacer bar, the spacing between adjacent plates can be quickly changed. A spacer plate is further provided for adjusting the position of the stack of plates relative to the loading and discharge openings to accommodate changes in the overall height of the stack of plates caused by the different plate spacings.

Abstract: A double acting press is disclosed having upper and lower vertically reciprocable slides and a bolster assembly therebetween, which bolster and slides support tooling for cutting and drawing a cup-shaped article from a flat blank of sheet metal in response to a cycle of reciprocation of the upper and lower slides. The bolster assembly is releaseably clamped in place with respect to the press frame during press operation and is adapted to be released from the frame and supported for rolling movement laterally outwardly of the frame to facilitate tool inspection, maintenance and replacement operations. Tooling associated with the upper and lower slides is adapted to be supported by the bolster assembly so that the entire tool package is movable into and out of the press confines with the bolster assembly.

Abstract: An improved lift arm is pivoted upward by a hydraulic cylinder to lift a plow blade by a chain connected between the lift arm and blade. The lift arm includes an elongated body with a chain receiving member permanently fixed to an end thereof. Engaging a link of the chain is a slot in an upwardly facing concave surface of the chain receiving member. The slot has a width slightly greater than the thickness of a link of the chain so that a link is engaged and restrained. An opening, having a width slightly greater than the width of the link, receives the chain ahead of the link restrained in the slot. Regardless of the relative orientation of the chain and lift arm, the concave surface causes the chain and chain receiving member to remain generally perpendicular.

Abstract: A pass-line adjusting mechanism is disclosed in association with the chocks of the lower back-up roll of a four-high rolling mill. The adjusting mechanism includes an axially slidable adjusting member having vertically stepped surface portions corresponding to each lower back-up roll chock, and an inverted channel-shaped support member interposed between the chocks and adjusting member. The support member has hardened upper surfaces underlying the chocks and engaging rocker plates thereon, and cross members providing lower surfaces engaging corresponding ones of the steps on the adjusting member. The support member is adapted to be elevated to lift the lower surfaces thereof from the adjusting member, and the adjusting member is adapted to be displaced relative to the support member when the latter is elevated to selectively position any corresponding pair of the steps thereof beneath the lower surfaces of the support member.

Abstract: A snow plow is detachably mounted to the front of a vehicle by interlocking members extending from the snow plow and vehicle. Engageable members on the plow are fixedly positioned a predetermined distance apart. Corresponding engaging members on the vehicle are displaceable between latching and unlatching positions by an over-center linkage arrangement. A first portion of the over-center linkage is pivotally connected to the vehicle. A second portion of the over-center linkage is slidably connected to the vehicle. Actuation of a hydraulic cylinder forces the over-center linkage to move from the unlatching position, wherein the blade and vehicle are disconnected, to the latching position, wherein the blade and vehicle are detachably connected. With the over-center linkage in the latching position, a toggle pin at the center moves against an abutment to lock the position of the over-center linkage, and therefore the plow onto the vehicle.

Abstract: An air filtration system for a cooking stove collects exhaust air from the stove with a vent hood, filters grease, particles and odors from the exhaust air and returns the filtered exhaust air to the room in which the stove is used. Exhaust air is cleansed of particles and odors by an activated charcoal filter within a return air conduit leading from the vent hood to the room. An electrically operated fan draws exhaust air into the vent hood, through grease filters and the activated charcoal filter and forces exhaust air back into the room. Regeneration of the activated charcoal filter is provided at selective intervals of time to maintain the effectiveness of the charcoal, and cooling of return air is provided for.

Abstract: A device for friction welding together two plastic strips which provides a weld having a strength approaching that of the strips. Movable friction jaws are oscillated on axes perpendicular to the plane of and through the strips with the result that the frictional motion is greatest in the middle of the welding zone and decreases almost to zero toward the ends of the welding zone.

Abstract: A laminated tube adapted to be used as the body of a collapsible dispensing container includes an inner layer of an epoxy resin, an intermediate layer of aluminum foil and an outer layer of thermoplastic material. The tube is made by forming a foil and epoxy resin laminate into tubular form having longitudinally extending circumferentially overlapped edges, and extruding thermoplastic material about the foil.

Abstract: A device for cutting a piece of a flat workpiece at a selected location identifiable by two or more binary coded numbers which device includes a cutter, a cutting platen having an upper workpiece supporting surface and a lower portion, a plurality of upstanding, shiftable members, a guiding arrangement on the platen adjacent the lower portion for loosely receiving the members, an arrangement for moving the members in accordance with the coded numbers and a structure for forcing the cutter against the cutting surface. In accordance with another aspect, the shiftable members are movable by binary fluid motors each including a series of axially aligned fluid actuating units having strokes corresponding to binary numbers and an arrangement for actuating certain of these units in the fluid motor to move the shiftable members in accordance with the extended condition of the binary motors.

Abstract: A storm overflow basin for use, e.g. in combined sewage systems has a storage tank leading to a storm overflow unit having a restricted sewage discharge and a storm overflow, the latter being provided with a weir at which there is mounted a flap gate engaging the crest of the weir with its bottom edge and being operable by float controlled means in dependence upon the water level in the storm overflow unit, to move away from the crest of the weir when storm conditions require a controlled overflow discharge. The normal sewage discharge is provided with restriction means that are also float controlled.

Abstract: An oven door seal of elastomeric material having metal hooks at the ends for mounting it on the door, which hooks are permanently fastened to flanges on the elastomeric material by a crimping operation.