Abstract: An antenna system is disclosed for plural band radio receivers having a common antenna. The system is especially adapted for AM/FM automobile broadcast receivers and may be used with a CB transceiver with a tri-band antenna. An impedance transforming means is provided at the base of the antenna and a single transmission line or lead-in cable extends from the impedance transforming means to the AM/FM receiver. The impedance transforming means has a high input impedance for the AM and FM bands and a relatively low output impedance to minimize the signal loss in transmission from the antenna to the receiver. The impedance transforming means includes a field effect transistor in a common source configuration and means are provided to produce substantially 100% voltage degeneration for both AM and FM signals.

Abstract: A control system (14) for a vehicle air conditioner driven by an associated internal combustion engine of the vehicle is disclosed as including a control circuit (40) for selectively operating the air conditioner to provide cooling of the vehicle in a manner that conserves fuel without appreciably affecting passenger comfort. A sensor (62) of the control system is responsive to an increased power demand on the engine to automatically suspend operation of the air conditioner by the control circuit until the engine output is subsequently increased with respect to the power demand. The control circuit preferably provides electrical operation of the air conditioner compressor which is driven by the engine and the sensor (62) senses the intake manifold vacuum of the engine to automatically suspend compressor operation whenever the vacuum falls below a predetermined extent.

Abstract: An adaptor is disclosed for use with audiometers to enable the measurement of the masking level difference (MLD) in a person's hearing capability. The adaptor comprises a signal channel and a noise (masker) channel which are connected respectively with the audiometer outputs and the earphones. Means are provided to apply the signal voltage and the noise voltage to respective mixers in the two channels and for selectively inverting the phase of the signal voltage at one of the mixers and for selectively inverting the phase of noise voltage at one of the misers. Various MLD test conditions can be established including binaural and monaural conditions and adjustable intensity at one ear.

Abstract: A worm gear set (12) particularly adapted for use as a valve actuator (10) includes a stop mechanism (14) having a blocking member (32) and a stop (34) that cooperate to terminate rotation of the worm (18) thereof in order to limit the extent of rotation of the gear (22) driven by the worm while preventing lockup due to excessive torque applied to the worm. An actuator (36) on the gear preferably moves the blocking member from a nonblocking position to a blocking position as the gear approaches an extreme of rotary movement whereupon the stop which is mounted on the worm is engaged by further worm rotation with the blocking member to terminate worm rotation and thereby limit the extent of gear rotation.

Abstract: In accordance with the invention there is provided a blasting media, particularly useful for deflashing and deburring, consisting of small cylindrical pellets of a resin material containing from 1% to 8% by weight ethylene-carbon monoxide-vinyl acetate terpolymer and the remainder substantially all polycarbonate resin. Further in accordance with the invention, such blasting media is made by simultaneously heating and mixing a mixture of the polycarbonate resin and terpolymer in the proportions specified, to render the mixture molten, extruding the mixture to cylindrical shape and cutting the extruded mixture into pellets.

Abstract: An enclosed passageway which provides a housing that is open at one end and has a back wall member on which is mounted a trap mechanism, is provided. The trap mechanism is capable of being both set and baited from outside the enclosed housing without handling the trap mechanism itself and which is disposable or capable of having the entrapped and killed animal displaced therefrom without personal contact. A tripping member of the trap mechanism is provided to trigger the trap without requiring the animal to contact the bait.

Abstract: A carton for beverage cans is disclosed with a matrix of inspection holes provided in the top and bottom panels to permit viewing of the tops of the cans for the purpose of return refund and the like. The carton has a removable door to provide an access opening and a closure panel is provided so the carton may be used for returning empty beverage cans.

Abstract: A bee feeder (10) disclosed includes a molded plastic receptacle (14) that is adapted to be mounted on top of a hive body (12) and has a construction that insures rapid feeding of bees until the receptacle is emptied of liquid feed without permitting any drowning. Side walls (16, 18) of the receptacle cooperatively define a rectangular shape and a bottom wall thereof extends between the side walls with a hollow projection (22) extending upwardly therefrom and between two shorter side walls (16) spaced from two longer side walls (18). An upper opening (24) in the projection has at least a portion located inwardly from each of the side walls and covered by a grid (26) of an inverted U shape that confines the bees as they pass into the feeder through the opening and downwardly on either side of the projection to the liquid feed.

Abstract: An adjustable socket (10) for rotatively driving bolts and nuts is disclosed as including a plurality of jaws (18) mounted on a rotatable driver (16) for quick action adjustment between fully opened and fully closed positions upon rotation of an adjuster (22) no more than one revolution. Each jaw has an inclined camming surface (28) that is slidably engaged by a jaw positioner (20) upon axial movement thereof in response to rotation of the adjuster so as to provide radial adjustment of the jaw positions. A spring (30) biases the jaws in an outward radial direction into engagement with the positioner. In one embodiment, the jaw positioner comprises a sleeve (20) which preferably has apertures (62) that receive the jaws, and the adjuster has a 360.degree. helical locking surface (26) that cooperates with a 360.degree. locking surface (24) on the driver in an axially opposed relationship to provide locking action and jaw adjustment.

Abstract: A coated paperboard container and a blank for constructing the container is disclosed as including a body portion having an upper end that is closed by a folded top end closure which includes closure panels and seal lips having a construction that enhances foldability and sealing. Front and back gable panels of the top end closure are each flanked by a pair of triangular inner roof panels that have different sizes than each other so as to facilitate folding of a top seal provided by the seal lips from a vertical position in a direction toward the smaller inner roof panels. Inner seal lips are each connected to one pair of the inner roof panels by a single score line and outer seal lips are likewise each connected to outer roof panels of the closure by a single score line. Terminal edges of the outer seal lips extend alongside each other in the constructed condition.

Abstract: A windshield wiper attachment disclosed comprises an elongated wiper blade member and a carriage member including a pivot arm for supporting the blade member at a first end of the pivot arm. The attachment further comprises an adaptor assembly including a bracket pivotally connected to a second end of the pivot arm and an adaptor pivotally connected to the bracket, the adaptor being adapted for connection with a wiper arm member. When the adaptor is connected to an arm member, the adaptor, the arm member, the bracket, the first end of the pivot arm and the blade member are aligned.A second windshield wiper attachment also disclosed comprises the same elongated upper blade member and adaptor of the first windshield wiper attachment. A second carriage member of the second attachment includes a disk member for supporting the blade element by flanges integrally formed therewith at a position spaced from a central pivot axis.

Abstract: A rack (12, 14) for burnishing toothed gears (16) is disclosed as having an elongated body of a multiple section construction that provides accentuated axial crowns to gear teeth burnished by the rack. Leading and trailing sections (36, 38) of the rack each have a tooth forming face (44) that provides the rotary support for the gear and the burnishing of the gear teeth (46) as the gear rotates between a cooperative pair of the racks. One of the toothed forming faces, preferably the trailing one, is slightly inclined with respect to the other rack section in a lateral direction along the elongated length of the body so as to provide the accentuated axial crowns on the burnished gear teeth. Both the leading and trailing rack sections are preferably mounted on a base (42) that interconnects the rack sections.

Abstract: Apparatus and a method disclosed for forming an axle spindle from a hollow axle blank incorporate a hollow punch having a metallic body with an inner work surface defining a work opening and a mandrel fixed within the work opening projecting toward an open end thereof from a closed end of the opening. During forming, the punch is moved relative to the axle blank in the direction the mandrel projects so that the mandrel is received within the hollow axle blank as the work surface of the punch body forms the blank about the mandrel to provide a spindle. Preferably, several punches of this type are utilized to complete the spindle forming process on the axle blank. Each punch preferably has an elongated annular shape with a round inner work surface and a round outer surface on the mandrel so that the formed spindle is of a round shape. One of the punches which causes outward material movement has an undercut on its mandrel to facilitate punch withdrawal.

Abstract: A loader (10) for a gear burnishing machine includes a gear carrier (144) and a guide embodied by a rack (122) for cooperating to move a gear to be burnished into meshing relationship with a gear rack of the burnishing machine. A hopper (22) including a feed mechanism provides feeding of the gears to the carrier. Carrier movement moves the gears from the hopper to the machine as the guide rack aligns the gear teeth for meshing with the gear rack teeth. A retaining shaft of the carrier captures the gears between spaced retainers of the carrier as the gears move to the machine for burnishing. A retaining member (66) and a movable dog (84) of the feed mechanism cooperate in feeding gears to the carrier. After burnishing, an actuator including a pusher (204) moves the burnished gear off the guide to a delivery unit 14 including an inclined ramp (198).

Abstract: A process is disclosed for making a bent metal tube having a metal-ceramic liner for thermally and acoustically insulating the tube. A generally straight metal tube is first lined with a metal grid before bending the tube to a desired shape. Heating of the grid and a ceramic slurry coated thereon forms the slurry into a monolithic ceramic body with the metal grid embedded therein so that the resultant liner provides a durable thermal and acoustic insulation for the tube. Insulated tubes for internal combustion engine exhaust systems are advantageously made by this process with the liner positioned within the tube to provide heat conservation, lower under-hood temperatures, lower noise, and longer tube life as well as allowing the use of lower grade and lighter gauge metal for the tube. The ceramic slurry is disclosed as being coated on the grid before the grid is inserted into the tube, after the insertion but before the bending, or after the insertion and the bending.

Abstract: A variable speed direct current shunt motor control system is disclosed for regulating the strength of the field to achieve and maintain a desired motor speed. The control system comprises a comparator circuit operable to compare a control voltage that is dependent on the armature voltage with a reference voltage that varies with torque demand. When the control voltage differs from the reference voltage, the comparator circuit develops a field demand or command signal that provides for the strengthening of the field to return the motor to the desired speed. A sensing circuit is incorporated into the control system to sense motor plugging and provide for field weakening.

Abstract: The invention provides a water filter, particularly suited for household use, with valving which enables either a bypass mode or a filtering mode. During the filtering mode the water flows through a number of filtering layers one of which is a microporous membrane and during the bypass mode the water flows parallel to and against the membrane so as to cleanse the membrane of material accumulated thereon during the filtering mode.

Abstract: Apparatus and a method disclosed for use in bending heated sheets of glass (G) transported generally horizontally on a conveyor (16) within a furnace heating chamber incorporate a holder (20) located above the conveyor in a spaced relationship such that a heated sheet of glass can be transported under the holder. Gas such as air is blown upwardly from below the conveyor against the heated sheet of glass such that the sheet is moved upwardly into engagement with the holder. The upwardly blown gas is provided by an array of gas jet pumps (60) positioned below the conveyor. A mold ring (44) is then movable under the holder to receive the glass sheet for bending. Holder (20) is disclosed as including curved and planar surfaces and as including curved and planar rings. A vacuum may be drawn with the holder embodiments having the surfaces so as to assist the upwardly blown gas in lifting the sheet of glass off the conveyor.

Abstract: A system (10) and method disclosed for use in bending glass incorporate a vacuum holder (12) having a surface (28) with spaced openings (32) in which a vacuum is drawn to support a heated sheet of glass (G) and in which pressurized gas is subsequently supplied to force the glass sheet away from the holder surface. In one embodiment, operation of a control damper (24) initially communicates a vacuum blower (20) with the holder and subsequently communicates a positive pressure air blower (22) therewith to first draw the vacuum and then supply the pressurized air to the openings in the surface which is disclosed facing downwardly. During an intermediate step, the damper is positioned so that a reduced vacuum is drawn to prevent deformation of the heated glass sheet at the spaced openings in the holder surface. In an alternative embodiment, a gas jet pump (90) is used to produce the positive and vacuum pressures used in the practice of the invention.

Abstract: A portable cart for carrying boxes of coiled insulated wire and a method of pulling the coiled wire from the portable cart are disclosed. The cart includes a frame assembly having a plurality of interconnected horizontal and vertical frame members which define compartments spaced in a line along the major axis of the vehicle. Adjacent compartments are in fluid communication with each other by passages formed through common horizontal frame members. A guide assembly is mounted on the uppermost horizontal frame member which has a passage formed therethrough substantially aligned with the other passages and the holes defined by the loops of the coiled wire when the boxes of the coiled wire are disposed in their respective compartments. A collar member of the guide assembly guides the unwound portions of the wires and allows the unwound portions to be pulled therethrough individually, or simultaneously with selected ones of the unwound wire without disturbing the remaining unselected unwound wires.