Abstract: A dual chamber orifice fitting comprising a first chamber maintained in fluid communication with a pipeline, a fluid flowing in the pipeline passing through the first chamber; a second chamber selectively maintained in fluid communication with the first chamber; a sealing member selectively rotatable from a first position wherein the sealing member seals the first chamber from the second chamber, and a second position wherein the sealing member permits the first chamber to be placed in fluid communication with the second chamber.

Abstract: A nonconductive holster for use with an electrical meter is disclosed. The nonconductive holster comprises a protective guard for preventing a person who is using the electrical meter from coming into contact with any exposed power sources being measured with the electrical meter. The nonconductive holster is fabricated of a nonconductive resilient material which provides the electrical meter with a protective coating in the event that the electrical meter is accidentally dropped or inadvertently struck.

Abstract: There is provided by the present invention a speed changing apparatus having a housing mounting a plurality of inwardly directed, circumferentially disposed teeth, preferably in the form of a ring gear. The housing has a hub that rotatably receives at least a first shaft that in turn eccentrically mounts a plurality of elongate follower arms. Each follower ann is mounted at one end to the shaft with the other end having at least one tooth configured to engage the circumferentially disposed teeth. The housing further includes a base plate that is rigidly attached to the second shaft. Rotary motion is transferred between the first shaft and a second rotatable member by apparatus that includes a base pin that is rigidly attached to the base plate, an arm pin rigidly attached to a follower ann and a linking ann pivotally attached at opposite ends to the base pin and the arm pin. The second rotatable member may be a second shaft, the housing, or the base plate.

Abstract: There is provided by the present invention a mechanical drive system for driving first and second screw conveyors from a single power source. This system includes a primary drive providing power to the first conveyor from the power source and a secondary drive that includes a pair of gear boxes and that supplies power to the second conveyor from the primary drive.

Abstract: A solid state semiconductor power switch for controlling the application of AC power to a load wherein the power switch employs momentary ON/OFF switches for activating the power switch, and wherein additional circuit means is provided to preserve the ON/OFF condition or state of the power switch during a power-down situation such that upon restoration of the AC power the power switch can be caused to assume the same ON or OFF state it was in just prior to the power-down situation.

Abstract: A self-closing invisible hinge for returning a door to its closed position rom its open position including a self-closing structure in which the closing force can be selectively adjusted externally at the hinge and in which the self-closing structure is compact.

Abstract: A drywall frame compression anchor assembly for use with a sectional metal frame to be mounted in an opening of a wall comprises a restraining bracket having a pair of space support legs and a jamb anchor. The jamb anchor includes a hat section havng a generally U-shaped center portion and a pair of opositely extending wings projecting therefrom. The jamb anchor is moveably mounted between the supports of the spaced support legs to engage the surface of the opening.

Abstract: A low voltage switch without moving elements, uses a triac power switching element in series with the AC load. A flip-flop circuit provides latching operation for On and Off functions. The triac is isolated from low-voltage actuating circuitry by an optoisolator which draws power from a step down transformer. The transformer also isolates the AC line from the manual switch circuits. A metal case is heat sink for the triac switching element. A threaded nipple, an integral portion of the casing, can be inserted through plug openings in standard electrical junction boxes to form a continuous heat flow path from the triac into the juncture box.

Abstract: An apparatus for supportably elevating and lowering material handling apparatus having an elongate member includes two arms radiating upwardly from a base. A lower undercarriage arm is pivotably attached to the elongate member, and the lift arm is attached to a roller support which moves along a rail on the elongate member. The roller support and attached lift arm arm moved by a winch-drawn cable. At least one pair of spaced support sheaves is mounted on the elongate member, and the cable passes under the sheaves. At least one riser post extends upwardly from the base and is attached to the lower undercarriage arm so that it intersects the cable between the spaced support sheaves. A sheave mounted on the riser arm intersects and supports the cable when the elongate member is lowered. As the elongate member is lowered, the riser post supports an increasing portion of the downward load.

Abstract: An apparatus for mixing animal feeds and the like comprises a rotor having two opposing end assemblies connected by a center shaft for rotation within a mixer box. A flighted outer auger is mounted in the terminal portion of each set of corresponding radial arms of each end assembly, parallel to the center shaft. Each outer auger is rotated by drive means within the first hollow rotor end assembly, powered by a high speed drive shaft, and the entire apparatus is rotated by a low speed drive shaft. The drive shafts extend from opposing end assemblies and are coaxial to the center shaft. An optional center auger or optional intermediately spaced augers, parallel to the center shaft, are rotated by drive means within the second end assembly, driven by one or more outer augers.

Abstract: A push-pull door latch having a pivotally secured handle and handle support perative for rotating a cam member via a pinion member in response to pivotal motion of an elongated leg on the handle support and the engagement of a driver tab on the elongated leg with the pinion member, and with the rotational motion of the cam member driving a slide member in translation, with the slide member connected with a bolt of a bolt assembly and with the translational movement of the slide member moving the bolt to a latched or unlatched position and with the slide member moving the bolt to its unlatched position in response to pivotal motion of the elongated leg by either pushing or pulling on the handle.

Abstract: A combination lawn mower cutting blade and removable thatching devices with he thatching devices being selectively adjustable to vary the depth of thatching relative to the depth of cut of the blade.

Abstract: An apparatus for collecting and transporting particulate material from directly underneath the discharge outlet of a vehicle includes a collection chamber for receiving the particulate material. An auger is provided to convey particulate material from the collection chamber to an auger chamber for subsequent discharge of the particulate material into a receiving hopper. An extension mechanism is provided which permits telescopic extension of the collection chamber and auger chamber so that the collection chamber may be placed directly underneath the discharge outlet of the vehicle. A vertical positioning mechanism is also provided which allows the collection chamber to be raised from a lowered position to closely abut the discharge outlet of the vehicle. A swivel base mount is further provided so that the collection chamber and auger chamber may be selectively rotated between a position generally parallel to the vehicle and a collecting position under the vehicle.

Abstract: A duplex strainer having a housing with an inlet port and a outlet port. st and second strainer chambers each have first and second ports which are in separate fluid communication with the housing. An efficient scotch yoke design coverts rotation of a first shaft into reciprocal lateral displacement of first and second disk assemblies to permit either the first or second strainer chambers to be closed off to flow while the other of the first and second strainer chambers remain open to flow.

Abstract: A centrifugal separator for grain and like particulate material utilizing a rotatably driven separator bowl having an outwardly inclined peripheral wall, in combination with a vibrator. Vibration and centrifugal force acting on material deposited in the rotating bowl cause it to move outwardly towards the bowl periphery and up the aforesaid inclined wall for selective discharge of relatively heavy and light particles at vertically spaced exit zones formed by a guide baffle assembly adjacent the upper periphery of the inclined wall.

Abstract: A grapple system is disclosed for mounting on the bucket of a tractor. A pple tooth frame is provided having a plurality of grapple teeth extending in fork-like fashion from a pivot tube. A linkage housing is also provided which contains first and second series connected linkages with a hydraulic extension member pivotally connected between the linkages. The free end of one of the linkages is connected to a first fixed point and the free end of the other linkage connects to a crank arm on the grapple tooth frame. The free end of the hydraulic member connects to a second fixed point in the linkage housing. The linkage housing connects to the grapple tooth frame via the pivot tube. When the grapple teeth are in an upward or open position, the linkage connecting directly to the crank arm is approaching an in-line configuration with the hydraulic member. In a closed or load engaging position of the teeth, the two linkages are approaching an in-line configuration.

Abstract: The invention provides a sealing strip and a frame, for instance a door frame, for use therewith. The frame includes a groove, to receive the strip, which is integrally formed in the material of the frame and which is so positioned and orientated that the strip is retained in an optimum position for firm contact by, and sealing with a closure, such as a door, to provide a barrier against passage therethrough of moisture, foreign matter, sound and heat.