Abstract: The control unit comprises an elongated body having a forward torch mounting portion. Rearwards of the torch the body houses a linear potentiometer which includes an upstanding control arm for its movable contact. An off-on switch is located within said body, in a position to be contacted and operated by the control arm. A thumb button controlled sliding control member is attached to the control arm. In use, the user grips the mid portion of the body and places his thumb on the thumb button. He uses a simple linear movement of his thumb to both control the linear potentiometer, for varying the welding current, and to operate the off-on switch, for turning the arc welding machine on and off.

Abstract: A door closer of the kind having a piston slidably mounted in a bore containing hydraulic fluid and dividing that bore into damping and reservoir chambers. Drive means is connected to the piston to respond to sliding movement of the piston and translate that into rotary motion for driving door connected linkage. The piston is spring influenced in a direction towards the damping chamber, and fluid pressurized by the piston tending to move in that direction bleeds from the damping chamber through an escape port which is controlled by a biased and movable closure member. Normally the closure member is biased into a rest position in which it blocks passage of fluid through the escape port, but it responds to fluid pressure in the damping chamber to move into an open position at which fluid can bleed through the escape port.

Abstract: A portable bat rack having a first configuration attachable to a fence for the storage of baseball bats and a more compact second configuration of smaller dimensions for transporting the bat rack. The bat rack is front suspended adjacent each end minimizing tilting by partially equalizing the moments caused by the weight of the bats. A shelf-like first support bar is provided with individual forward opening recesses spaced laterally to independently receive each bat in a substantially vertical position. A bat receiving second support bar is provided and is detachably connected to the first support bar thereby allowing end-to-end coplanar abutting of the adjacent support bars in first configuration. A pair of hangers are pivotally attached to the first support bar near each end for attaching the bat rack to an open weave fence. A third hanger is pivotally attached to the outward end of the second support bar. Each hanger is rotatable against its respective support bar in the second configuration thereof.

Abstract: Sulfur recovery from smelter and like exhaust gases by regfrigerating the exhaust gases and removal of most of the contained water and SO.sub.2 as a liquid phase, the removal being by liquid spray scrubbing, utilizing previously recovered water, after SO.sub.2 removal therefrom, as the scrubbing liquid. Single or plural stages of refrigeration and liquid phase separation can be employed. The SO.sub.2 is removed by combining thereof with the cool scrubbing water and is recovered by chemical treatment to neutralize and precipitate such as a sulfite salt.

Abstract: A conductive member of plate form is supported on a spring biased member into a static postion of contact at a first corner with a support surface and at a second adjacent corner with a first contact member. A load applying member makes contact with the conductive member on the side thereof opposite from the spring biased support. A low rising pressure acting through the load applying member swings the conductive member in position about a first axis defined by its locations of contact with the support surface and the first contact member into a position in which it also contacts a second contact member and completes a conductive path between the two contact members. An intermediate rising pressure signal causes the conductive member to swing in position about a second axis defined by its locations of contact with the two contact members and against the operator of a micro-switch.

Abstract: A method of direct flame incineration of a polluted air effluent, such as the effluent from a coffee roasting oven. The method is employed in apparatus comprising a cylindrical housing containing three concentric longitudinally aligned shells, each of which defines a respective combustion zone, and with the outermost shell defining with the housing an effluent heat exchange passageway to receive the effluent from an effluent inlet. A fuel gas or oil nozzle directs a spray of fuel forwardly into the first innermost shell, with primary air also flowing into the first shell to provide initial combustion of the resulting air-fuel mixture. The effluent flowing from the heat exchange passageway flows partly through an annular secondary inlet into the combustion zone of the second intermediate shell, and partly through an annular tertiary passageway into the final combustion zone of the third outermost shell.

Abstract: A two component field mix explosive composition comprising a first solid component comprising ammonium nitrate or mixtures of ammonium nitrate with ammonium perchlorate, and a second liquid component comprising as a first ingredient hydrazine, a second ingredient which is water, alcohol or a mixture thereof, and as a third ingredient ammonium nitrate in an amount no greater than about one-sixth of the total weight of the second component. At the site of use the liquid component is poured into the solid component to form an explosive composition. This composition is detonable in elongate packages as small as one inch in diameter, by use of a blasting cap.

Abstract: An elongated air discharge tube extends along the bottom of a chamber in an elongated housing. The housing is placed on the bottom of an aquarium tank along a side wall thereof. The tube includes a plurality of upwardly directed air discharge openings. The discharged air flows upwardly through the chamber and then through openings in the chamber's lid, to issue as a wall of air bubbles into the tank. The rising air bubbles create a circulation pattern of the water in the tank, first upwardly with the air curtain, then laterally across the tank to the opposite wall thereof, then downwardly, then back along the bottom of the tank to the air curtain side of the tank. The inlet to the air pump chamber may include a filter chamber in which a replaceable filter material is provided, for mechanically removing suspended particles from the circulating water.

Abstract: A winch mounted to an automobile bumper and comprising a cable winding drum rotatably mounted between a main drive housing and an opposite end idler housing. The main drive housing has a main lower section of integral box-like construction and an open top closed by an upper housing section. The drive end of the drum and an intermediate drive member are inserted laterally into the lower housing through access openings, and are retained in place by a downwardly inserted retaining plate. The remaining drive components are inserted into the lower housing section through the top opening or positioned in the upper housing section. This construction provides for easy assembly of the drive components, with box-like construction of the main housing being better able to withstand the substantial force loads exerted thereon.

Abstract: Geometrically, my keyboard is characterized by a two-dimensional pattern of at least six horizontal and at least six vertical rows of keys. The center-to-center spacing between adjacent keys, both horizontally and vertically, is no greater than about one inch. Musically, the tones represented by the keys are arranged from left to right in ascending half-steps or in evenly spaced microtones and are stacked vertically in ascending perfect fourths. In preferred form, my keyboard comprises sixteen horizontal rows of keys and sixteen vertical rows of keys and possesses a tonal range that is slightly greater than the tonal range of a conventional piano.

Abstract: A locking device for a pair of skis having a first and second attachment mountable on respective skis. The first attachment includes a locking bolt which is positioned flush with the underside of the ski in a retracted position and is projected substantially beyond the underside of said ski in an extended position. A head portion of the lock bolt is received through an orifice of a second attachment and includes a lock surface for mating with end wall surrounding the orifice. The lock bolt head is rotated to a locked position by a lock means which is operated by a tumbler. A bolt is threadably received into an opening formed from the upper to the lower surface of each ski and provides a mounting for a housing portion of each attachment.

Abstract: The stand is for use in a motor vehicle. It has open and closed positions and when fully open provides a pair of adjoining compartments for receiving loaded grocery bags. The walls of the stand prevent the bags from tipping when they are subjected to the inertial forces resulting from starting, stopping or turning of the transporting vehicle. The two compartments are independently foldable and are open at both top and bottom. The walls are pivotally connected at each corner to allow independent folding of the compartments between open in use positions for receiving a loaded grocery bag and closed positions for more compact storage in the transporting vehicle. Friction locks are provided at each pivot joint for overridably locking the stand in its open and closed positions.

Abstract: The andiron comprises four corner posts and upper and lower sets of horizontal log support bars. The lower bars are continuous and are adapted to support a plurality of logs in a horizontal position above the floor of a fireplace. One of the upper bars is continuous and the other is open at its center. The open centered bar has two end portions, each of which is adapted to support at least one log in a horizontal position above the lower logs. The open center permits one or more additional logs to be placed diagonally, with the lower ends(s) thereof on the lower set of logs and the opposite end(s) on the continuous upper support bar. The sloping attitude of the additional log(s) facilitates both its ignition and the ignition of the upper set of logs. As the logs burn they eventually break at their centers and fall downwardly into the confines of the andiron, usually into diagonal positions with their outer ends supported on one of the cross members.

Abstract: A longitudinally split socket member is connected to an end of an elongated drive shank having throughout a part of its length a generally square cross-section and threaded corners. An adjustment cone is threadably received on said threads and when rotated travels along said shank and axially into or out from a longitudinally split conical socket formed in lever portions of the socket member halves. Axial movement of said cone adjusts the spread of the lever portions of the socket member. This results in pivotal movement of the two socket member halves about a transverse pivotal axis and also results in a corresponding change in the spread of wrench jaws which extend endwise of the socket member from the pivotal axis, oppositely from the lever portions. A drive member is movable axially along the drive shaft and carries a plurality of drive keys which extend from said drive member axially into key sockets formed therefor in the lever portions of the socket member halves.

Abstract: A plastic tubular pack frame is disclosed employing a unitary main frame member and uniquel y constructed transverse support members including a pair of tee connectors interconnected by a tubular cross member. In one embodiment, a transverse support member is formed by heating a section of plastic tubing, placing the ends of the tubing on the pin portions of tee connectors and allowing tubing to cool and shrink onto the pins. The pin portions of the tee connectors include a series of circumferentially and axially extending ribs which engage the internal walls of the box ends of the cross member forming a connection normally fixed against axial disconnection and normally fixed against rotation but rotatable without fracture in response to above normal rotational torques.

Abstract: Compatible AM stereophonic receivers for reception of a radiant energy carrier wave modulated with two stereo related signals (L and R), each appearing as a respective first order single-sideband. Receivers embodying the invention in general improve an optimize output stereo signal quality by quadrature demodulation of the carrier to derive the stereo difference (L-R) signal, together with in-phase detection of the stereo summation (L+R) signal, the L+R and L-R signals thus derived being placed in phase and combined through sum and difference circuits to obtain the stereo related (L and R) outputs. Demodulation distortion may be minimized by inverse amplitude modulation of the carrier wave with a portion of at least the envelope fundamental (and preferably also one or more harmonics thereof). The carrier wave is preferably enhanced prior to quadrature demodulation and preferably is also modulated with an infrasonic frequency (e.g.

Abstract: A circuit board having through hole connections between circuit elements on opposite sides of the board. Each through hole has its end portions countersunk, with peripheral portions of the circuit element depressed into the countersink area. A layer of conductive material is plated in the wall of each hole, with the conductive material overlapping the circuit element material that is depressed into the countersink.In the method of the present invention, a resist coating is applied uniformly over both planar surfaces of a circuit board on which the circuit elements have already been formed. The portions of the circuit elements contacting the edge portions of the through holes in the board are mechanically depressed into the substrate to form the countersink areas. Thereafter a coating is applied, either by an electroless process or electrolytically to form the plated through hole connection.

Abstract: A plurality of radial bat support arms are secured between two axially spaced apart hub plate members. The plate members form a hub assembly which is secured to radial mounting lobes on a thin walled center tube of a harvester reel. Each bat support arm has a base portion of channel form in cross section. A single bolt is used for connecting the web of such base portion directly to a first hub plate member. Two additional bolts extend through both hub plate members, through gusset portions of the support arm which lie against the second hub plate member, and through tubular spacer means positioned axially between the gussets and the first plate member. The two additional bolts are both circumferentially spaced apart and radially spaced inwardly from the single bolt. The hub plate members include spacer blocks welded to their inner surfaces at the regions thereof which outwardly bound the mounting lobes on the center tube.

Abstract: A constant flow valve for low flow rates employs a tire valve assembly which is threadably received within the downstream end portion of an axial passageway formed in an elongated inlet tube. The tube is received within a stem portion of a first part of an internal housing. A movable wall which is at its periphery clamped between a base portion of such first part and a bell portion of the second part, divides the interior of said housing into upstream and downstream chambers. The stem portion of the tire valve assembly extends into the upstream chamber and contacts the movable wall. A biasing spring is located in the downstream chamber and exerts a biasing force against the movable wall which is in turn transmitted to the control stem. A considerable length of relatively small internal diameter, high flow resistance tubing is coiled about the inlet tube and the stem portion of the first housing part.

Abstract: Two feed conveyors and two spreader augers are independently driven, each by its own drive motor. The control means for each feed conveyor includes a sensor at the discharge end of the feed conveyor and means responsive to changes in the level of the paving material at the sensor for proportionally increasing the drive speed of the conveyor as the level drops and proportionally decreasing the drive speed of the conveyor as the level rises. The control means for each auger includes a sensor adjacent the discharge end of the auger and means responsive to changes in the level of the paving material at the sensor for proportionally increasing the drive speed of the auger as the level drops and proportionally decreasing the drive speed of the auger as the level rises. The paving material compartment, which includes the feed conveyors and spreader augers, is enclosed. Fumes are pumped out from the enclosed feed path and into a pollution control device.