Abstract: A deep well pump jack having a walking beam pivotally mounted on a Samson post with sucker rods depending from one end of the walking beam and a counterbalancing weight carried by the other end of the walking beam, and a prime mover is provided to rock the walking beam up and down in operation through pumping cycles. During pumping cycles, the counterbalancing weight is moved or driven in movement relative to the walking beam such that the center of gravity of the counterbalancing weight follows a vertical pattern of movement throughout each pumping cycle wherein the center of gravity travels in a substantially straight line while traveling upward and in a line of curvature directed outwardly away from the Samson pivot while traveling downward to compensate for the varying loads placed on the prime mover during each pumping cycle.

Abstract: A plurality of AC synchronous motors used to drive respective machines in a manufacturing or packaging assembly line or system are driven in speed and phase synchronization. A common AC current supply signal is inverted to provide one polyphase set of series of controlled frequency low voltage DC pulses in a lead inverter. This polyphase set of pulses are amplified and utilized to drive the AC synchronous motor for the lead machine in the system. This same set of polyphase pulses are also transmitted directly to follower inverters respectively and there amplified to drive respective synchronous motors in the system to not only insure speed synchronization but also absolute phase synchronization in driving all machines in the line. When the frequency of the polyphase set of pulses is varied to correspondingly drive the AC synchronous motors at predetermined speeds, phase synchronization of the motors will always be insured.

Abstract: A tower packing element for use in towers for distillations, gas absorptions and related mass transfer operations. The base of the element has a surface contour which is generated by the rotation of a two-dimensional curve having reverse curvature through an approximate angle range of from ten to one hundred and eighty degrees around a straight line which lies within the plane of said curve. The base is further provided with slots and depending tongues.

Abstract: A hauling vehicle, notably for hauling big aircraft, has an elevatable framework provided with a recess extending inwardly from one end with guideways in its side walls, in each of which there is a pair of spaced slides. Mounted in the slides are the axles of elongated horizontal support members or sole-pieces pivotally supporting parallel upper and lower shoes. The recess can be opened to receive aircraft wheels by swinging out the shoes at the outer end of the recess. After the shoes have been swung back into place, the slides in each guideway can be moved toward each other to engage all of the shoes with the aircraft wheels in the recess.

Abstract: A box structure having a light source therein and a light transmission panel on the front thereof to receive X-ray films thereon for viewing with back-light illumination is provided with a horizontal cross bar detachably secured across the light transmission panel at a predetermined vertical position to divide the viewing screen into upper and lower viewing areas. The bottom of the cross bar is provided with a portion for detachably retaining a film edge for viewing of a film in the lower viewing area, and shades are horizontally secured at the top or bottom of the front of the box structure and are vertically drawable to cover at least an underlying portion of the light transmission panel to reduce glare.

Abstract: In a mill roll bearing assembly, wherein a mill roll neck is coaxially received in a bearing sleeve journaled for rotation therewith in a housed bearing, and which further includes a sleeve retainer secured to the annular outside end of the bearing sleeve, an inspection passage is provided through an upper end portion of the bearing housing, which reveals the then rotatably positioned uppermost end portion of the sleeve end retainer where it annularly mates with the bearing sleeve and a removable closure is provided for the passage. A second inspection passage is also provided through the end of the sleeve retainer near the outer peripheral edge thereof, which reveals a portion of the outside ends of the sleeve and roll neck where they annularly mate. A feeler gauge is then inserted through the passages when aligned, to check whether the roll neck is fully seated in the bearing sleeve.

Abstract: A taper journal bearing for rolls for use in rolling mills including a keying arrangement for keying the roll neck sleeve to the roll neck. The bearing includes a bushing housed in a roll bearing chock, a sleeve closely fitted onto a tapered journal or roll neck of the roll, an oil film deposited between the bushing and the sleeve, and a key arrangement for fixing the sleeve to the roll wherein a flat is machined on the outer end of the taper on the surface of the taper journal of the roll in parallel to the taper with this flat underlying one end of the sleeve at the outer end of the load zone of the roll neck. A keyway is provided in one end of the sleeve such that it is open to and in registration with the flat machined on the roll neck taper. A key is slidably received in the keyway and has a tapered flat surface in sliding engagement with the flat on the roll taper to create a wedging action against the flat when the key is urged into the keyway.

Abstract: A double wall sheath for receiving an arm or leg is separated into longitudinally spaced inflatable air cells for encircling the limb. The cells are connected to a source of air pressure by tubes and normally closed valve means that are opened periodically by timing means to inflate the cells and then are closed simultaneously. Pressure regulatory means are connected with the tubes for delivering progressively less air pressure to each successive cell from one end of the sheath to the other to promote flow of body fluid along the limb.

Abstract: A supporting bracket is secured to the housing of a tightener for a load binder used with a truck. The bracket extends outwardly in overlapping engagement with the upper surface of the inwardly projecting flange of a truck bed side rail and is slidable along the rail. A sprocket and ratchet are rigidly mounted on a shaft rotatably mounted in the housing, and a pawl connected to the housing engages the ratchet. When the shaft is rotated a sprocket chain, one end of which is fastened to the load binder, is wound on the sprocket to tighten the load binder. A shock absorber and tension-indicating block is disposed between the housing and the side rail.

Abstract: A gas filter is formed from two uniformly spaced nesting screens extending along a serpentine path, with the space between them filled with granular filtering material. Each screen has laterally spaced areas curved in one direction lengthwise of the serpentine path and alternating with laterally spaced areas curved in the opposite direction and integrally joined thereto to thereby provide the screen with a continuous curvature from end to end of the serpentine path.

Abstract: An injection mold for molding plastic needlepoint sheets which have a plurality of aligned rows of perforations which define plastic threads therebetween in a lattice configuration. The mold has engageable top and bottom mold body halves with open uniform mold channels formed in each half in a lattice configuration wherein the channel lattices of the mold halves cooperatively mate with each other upon engagement to define a mold cavity therebetween for the molding of a needlepoint sheet. The lattice channels in the mold body halves are constructed whereby the lattice channels in one half define a greater total volume than that of the other half, such that the greater volume of plastic to be molded in the mold cavity is received in the ejection half of the mold. In order to facilitate removal of the molded sheet from the mold, the lattice mold channels in the mold body halves are contoured to define a resultant cross section of the thread of a needlepoint sheet to be molded which is polygonal.

Abstract: A filtering respirator in the form of a mask has an outer casing and a filter layer inside the casing. The edge of the filter liner is sealed to the casing and the rest of the filter layer is spaced from the casing to provide an interspace between them which is connected with the outside atmosphere by an opening in the casing so that exhaled air will leave the mask at a velocity sufficient to prevent inhaling of the exhaled air.

Abstract: In a drilling head assembly for rotary well drilling a tubular member has an external screw thread near its lower end, with the outer surface of the member below the thread tapering downwardly to its lower end to form a sealing surface. Screwed onto the thread is a metal ring that extends down past the sealing surface and is provided with an annular recess encircling and facing the sealing surface, from which it is spaced. A resilient sealing member encircles the ring and is secured to it, with the portion of the ring beside the sealing surface and below it embedded in the sealing member which also fills the annular recess in the ring. The sealing member converges downwardly below the ring to a neck portion, and the inner surface of the sealing member converges from above the annular recess downwardly to the neck portion so that the sealing member between the tapered sealing surface and the encircling portion of the ring is compressed by them to form a seal.

Abstract: In a boring machine having an elongated rotating boring bar for internal end boring of elongated workpieces, the boring bar is rigidized during initial internal boring operations by clamping the workpiece in axial alignment with the axially rotating elongated boring bar and the boring bar is radially clamped intermediate its ends with a clamp which rotates with the rotating bar to rigidize the bar during initial boring operations. After initial end boring of the workpiece, the clamp is radially retracted and the boring operation is continued on the workpiece to a depth beyond the position of previous clamping on the boring bar.

Abstract: A sealable container for paint dissolving and cleaning fluids for storing and cleaning a paint roller cover sleeve. A central post having an enlarged foot at the bottom thereof for engaging the inside bottom wall of the receptacle such that a paint roller cover is coaxially received over the post and rests on top of the bottom foot of the post to provide sediment clearance space at the bottom of the container and to additionally provide a handle at the top of the post for removing the post from the container together with the paint roller cover sleeve without having to directly handle the sleeve. A drain position is provided at the upper end of the container so that the foot of the post may rest at the drain position to permit the remaining fluids contained within the roller cover sleeve to drain back down into the container.

Abstract: A portable heater for generating and circulating heat in wearing apparel. The heater consists of a compact insulated case having a cavity therein which is adapted to receive a chemical heat cartridge which gives off heat through an exothermic chemical reaction when an activator or catalyst is added to the chemical content of the cartridge. A liquid reservoir is positioned in the case for radiant heat transfer from the chemical heat cartridge. A flexible liquid conduit has opposite ends thereof connected for circulation of the heated liquid from the reservoir in a closed circuit, and a pump is provided for circulating the heated liquid through the conduit on demand.

Abstract: A mattress pad having a porous aluminum silicone layer for reflection and retention of body heat.

Abstract: A door closing device which is easily mounted on, and easily removed from, an offset pivot hinge. The door closing device has an outer sleeve, an inner member rotatably mounted in the outer sleeve and a coil spring having opposite ends thereof connected to the outer sleeve and the inner member, respectively. The door closing device is mounted on, and operatively connected to, the pivot hinge by non-rotatably fitting the inner member and the outer sleeve with a pivot pin of the pivot hinge and a hinge plate pivoted on the pivot pin, respectively .The door closing device is provided with a door closing speed damping mechanism, a door stopper mechanism, and/or a preset mechanism for the door closing torque, which are assembled within the outer sleeve.

Abstract: An industrial metallurgical delining assembly for dislodging and removing refractory or other material from upwardly open metallurgical process vessels. The assembly includes a spider-leg frame, the feet of which are supported on the upper periphery of the vessel, and supports a turntable over the top of the vessel. An extensible and articulatory boom depends from the turntable and selectively carries working tools at its free end for dislodging and removing material from the vessel. The vertical spacing between the uppermost end of the vessel and the turntable is sufficient to provide clearance for the boom to remove such dislodged material to a location outwardly from the vessel.

Abstract: A golf practice apparatus for indication of the face angle of the impact face on the head of a golf club at the time of ball impact when making a practice swing. The golf club is provided with a light-reflective surface, preferably the ball impact face itself, and a concentrated beam of light coming from a source spaced from the point of ball impact is positioned to direct the beam of light in a path adjacent the point of ball impact for reflection off of the reflective surface on the club head, as it is approaching the point of impact.