Abstract: A screen tensioning assembly for vibratory, particulate material-screening apparatus of the type including a frame having spaced, parallel, upstanding side panels connected by spaced, horizontal screen support members, and two, extended area apertured screens supported on the support members and extending substantially between the side panels for separating finer from coarser material. An up-turned hook portion is formed at one side of each of the screens. Each of the screens is tensioned by a clamping member having opposite ends with one end normally engaging the respective hook portion and the other end engaging the respective side panel. Each clamping member has a pivot member secured thereto adjacent its other end, extending through an aperture in the respective side panel, and having a portion engaging the respective side panel so that the clamping member may be pivoted upwardly from the respective screen to a stored position thereby to disengage the one end thereof from the respective hook portion.

Abstract: A capacitor discharge ignition system including a DC to AC inverter circuit for converting a battery voltage to high voltage AC, and a rectifier for rectifying the high voltage to DC. A power capacitor and the primary winding of the ignition coil are serially coupled across the output of the rectifier. A silicon controlled rectifier is also coupled across the output of the rectifier and has its trigger element coupled to a trigger circuit which provides a trigger signal to turn on the silicon controlled rectifier in response to opening of breaker points thus causing the power capacitor to discharge through the primary winding of the ignition coil thereby to provide the requisite high voltage in the secondary winding to provide the spark at the respective spark plug.

Abstract: A rotary actuator for converting reciprocating motion to rotary motion including a housing having spaced-apart end plates connected by guide rods. A bellows is provided having opposite sides one of which is connected to one of the end plates, the bellows being adapted to be connected to a source of fluid under pressure so that the bellows expands from a collapsed to an expanded position. A guide plate is provided movably mounted on the guide rods with the other bellows side being connected thereto. A rack and pinion assembly is provided mounted on the other end plate, the rack being connected to the guide plate so that expansion and contraction of the bellows causes linear movement of the rack thereby imparting rotary movement to the pinion. A spring acts between the guide plate and the other end plate thus resisting expansion of the bellows and returning it to the collapsed position upon the release of fluid pressure.

Abstract: A spool having an elongated barrel has a strap supported at one end at a bottom flange on the barrel with the strap passing upwardly therethrough out of the upper end thereof. The strap is removably attached to the bottom flange. A handle is affixed to the strap portion which extends beyond the upper end of the spool. A rigid frame having an upright portion is affixed to a base supported by casters. The frame has a member rigidly affixed to and transversely extending from the upper end of the upright portion which overhangs the spool. A lever having a transverse portion near one end is pivotally connected at the distal end of the transverse portion to the frame member. An arm is pivotably secured at one end to the upright portion and at the other end is engageable with the spool handle. A link is pivotably connected between said arm and the transverse portion to provide a toggle linkage.

Abstract: A fluid power system including a fluid power cylinder having a piston and fluid ports at its opposite ends, a directional valve for selecting the direction of piston actuation, and a metering control valve coupled between the directional valve and the cylinder. The control valve includes a cylinder section having a control piston therein and a valve body connected to the cylinder section and having a valve spool-receiving cavity therein. The valve body has first and second fluid ports therein communicating with the cavity, one of the valve body ports being coupled to one of the power cylinder ports and the other being coupled to the directional valve. A valve spool is disposed in the valve body cavity operatively connected to the control piston and movable therewith, the spool having a passage therein.

Abstract: An elongate reference beam is affixed to longitudinally spaced supports at a working height. A reference stop is mounted for longitudinal adjustment along the beam and is typically placed near one end of the beam. A reference guide is mounted for longitudinal adjustment along the beam and is typically placed adjacent the other end of the beam. The stop has three cooperating faces forming a three dimensional corner: a horizontal face vertically supports a workpiece, such as an elongate wooden stud; a vertical face laterally disposed to the beam longitudinally positions one end of the workpiece; and a vertical face disposed substantially parallel to the beam laterally positions the one end of the workpiece from the beam.

Abstract: A spool barrel has flat sides which preferably are tapered from one end to the other. Rounded corners are formed between adjacent side edges. Each of the corners has a plurality of wire receiving ridges whereby the first or base layer of wire windings on the spool will nest in the grooves or channels between the ridges and be held thereby against axial movement on the spool barrel. A molded spool barrel having an integral molded lower flange has a molded upper flange removably attached to the upper barrel end.

Abstract: An imprinting wheel which comprises a plurality of annular disc members coaxial with a shaft and axially spaced therealong to define radially outwardly facing spaces therebetween and connected for rotation in unison. Printing type elements of rubber-like material have a printing portion terminating in a printing face and a base portion provided with an inner circumferential surface and joining ears which extend laterally of the printing portion. Adjacent pairs of disc members have first coaxially aligned annular shoulders forming first annular steps in the disc member which respectively engage the ears of a type element with the base portion extending across the space and the printing portion extending radially outwardly in the space and beyond the peripheral edges of the disc members, the first shoulders preventing radial outward movement of the type element. Annular resilient members have inner and outer circumferential surfaces.

Abstract: A wire drawing die employing a synthetic hard, wear-resistant material, such as a polycrystalline aggregate of synthetic diamond or a polycrystalline cubic boron nitride includes a metal casing having flat, parallel front and back sides. A cylindrical cavity is formed in the front casing side having a flat bottom, the side wall of the cavity being undercut adjacent the bottom. A first layer of metal powder is deposited in the casing cavity covering the bottom and the undercut. An annular metal blank having flat opposite sides and a core formed of the hard, wear-resistant material is placed on the first metal powder layer and adhered thereto, the core being concentric with the cavity. A second layer of metal powder is deposited in the cavity covering the first layer and the blank, the metal powder of both layers having a melting point lower than the thermal degradation temperature of the core.

Abstract: A latch member is affixed near one end of a vehicle body and may be in the form of a rigidly supported horizontal rod spaced from the body. A latch is attached to a loading dock in position for registration with the rod as the vehicle body approaches the dock. The latch automatically releasably engages the latch rod to releasably hold the vehicle body to the dock to prevent relative movement between the body and the dock during load transfer between the dock and the body. The latch may be pivoted or otherwise movably adjustable relative the dock to receive rods at different rod positions relative the dock. Signal lights are provided to indicate the latch condition. A remote latch control is provided for operation from the vehicle operator station.

Abstract: A fluid power cylinder comprising a cylinder barrel, a guide rod received within the cylinder barrel and a piston slidably received within the cylinder barrel over the guide rod for rectilinear movement, means for slidably keying the piston to the guide rod whereby the piston is locked against rotation with respect to the guide rod about the longitudinal axis thereof, a guide rod holder rotatably received in the end cap for rotation coaxially with the piston and the guide rod, a pin connecting the guide rod and guide rod holder so that the guide rod is locked against rotation with respect to the holder about its longitudinal axis yet is permitted a limited degree of tilting about the end received in the guide rod holder, and a cam lock associated with the end cap for releasably clamping the guide rod holder against rotation.

Abstract: An elongated manually manipulable housing contains a photocell at one end for sensing energy levels in the visible frequency spectrum causing said photocell to correspondingly change in electrical conductivity. A portable power source in the housing is coupled to the photocell to provide an electrical signal corresponding to the change in the photocell conductivity. A comparator circuit in the housing compares that signal with an adjustable reference signal to provide an output signal upon a predetermined ratio between the compared signals. A multivibrator circuit in said housing is coupled to said comparator circuit and to a vibration-generating means which produces signals preferably in the audible range, so that upon the occurrence of an output signal, a user discernible, either audible or tactile, vibratory signal is generated.

Abstract: An upright post is affixed to a vehicle body adjacent a corner of that body. An elongated extensible support strut is mounted at one end in swivelled relation adjacent the bottom of the post. An elongated tube is mounted adjacent the upper tube end in swivelled relation to the upper end of the post. The tube is pivotably attached adjacent its lower end to the other end of the strut so that the tube and strut can swing about the post and towards and away from the post. Conveying means are mounted inside the tube to convey particle matter from the lower end to the upper end of the tube. A hopper is mounted adjacent the lower end of the tube and in particle flow communication with the conveyor. A discharge spout is mounted at the upper end of the tube in particle flow communication with the upper end of the conveyor.

Abstract: A pressure sensitive valve is mounted on the barrel of a magnet wire spool to be closed by wire wrapped on the barrel. Superatmospheric pressure is maintained internally of the barrel which is released upon opening of the valve by removal of the wire from the spool. A pressure-sensing device activates in response to such pressure release to provide a warning signal or suitable control function.

Abstract: A temperature stabilized refrigeration evaporator coil for use with a mechanical refrigeration compressor and condenser is disclosed which gathers and retains its own latent heat sink material to temperature stabilize its air heat exchange surfaces. The evaporator is adapted to condense water from the air it is cooling, and to retain an adequate quantity of that water to employ as a liquid-solid phase change, latent heat sink to temperature stabilize the evaporator, air heat exchange surfaces, so that they do not become excessively cold during the on cycle of the compressor, and so that they do not become excessively warm during extended periods of the off cycle of the compressor.

Abstract: A non-frosting heat absorption system is disclosed for temperature stabilizing the heat absorbing surfaces thereof and includes a heat absorption arrangement such as a refrigeration system evaporator coil having a first series of heat exchange surfaces in good heat transfer relation therewith. A second series of heat exchange surfaces have portions thereof in good heat transfer relationship with a heat load such as air circulated thereby and other portions thereof immersed in and coupled to the first series of heat exchange surfaces by a heat storage arrangement including a phase change material such as water. The phase change material then permits the transfer of heat from the second series of surfaces to the first series of surfaces while allowing the second series of surfaces to be maintained near the phase change temperature of the material during various heat load conditions.

Abstract: A fluid control system for a mobile aerial tower which includes a plurality of positioning elements such as first and second interconnected booms and a turntable for rotating the booms about a vertical axis. The control system comprises first and second variable speed pumps and a bank of three double acting valves operatively connected between the pumps and the positioning elements so as to control the direction of fluid flow thereto, and a pneumatically linked remote control system for selectively controlling the speeds at which the pumps operate and for selectively operating the valves to direct fluid between either of the pumps and any one of the positioning elements, or alternatively between both of the pumps respectively and any two of the positioning elements, or alternatively between the pumps collectively and any one of the positioning elements.

Abstract: This invention relates to a non-rotatable fluid powered nozzle and valve combination which includes a cylinder having a piston reciprocally received therein for movement between two reciprocated positions and which defines two separated fluid chambers therewith. A piston rod secured to the piston is slidably received through one end of the cylinder, the cylinder being provided with two ports communicating with said two chambers, respectively. The piston and piston rod conjointly having a longitudinally extending passage therethrough. A hexagonal pin is disposed in one of said chambers and is slidably received in sealing relation by a hexagonal portion of the aforesaid passage. The pin is secured in the other end of the cylinder for limited radial but against longitudinal movement with respect to the cylinder.

Abstract: A positive feed drill having an elongated spindle mounted for reversible longitudinal motion in a drill housing. The spindle has an hexagonal cross-section with the apices of the hexagon being threaded. A toothed drive gear having a hexagonal aperture centrally thereof has a close sliding fit with the spindle and is mounted for rotating the spindle. A feed gear having a threaded aperture centrally thereof is in threaded engagement with the spindle apices and is selectively rotated at a different rotational speed than the drive gear to longitudinally advance and retract the spindle. A gear for driving the feed gear is pin-slot locked to a motor gear for longitudinal spindle advancement, and is pin-slot locked to the housing for rapid spindle retraction. A pneumatic circuit in cooperation with limit valves and stop members provides completely automatic drilling to an adjustable depth, a dwell, and a positive retract operation with an economy of pneumatic energy.

Abstract: A positive displacement fluid moving mechanism having economical construction features, novel porting provisions and adjustment means which allow it to possess a very high ratio of fluid displaced per unit rotation in relation to the volume of the displacing mechanism, whereas, this feature allows increased performance due to less energy required to operate the unit due to less internal friction.