Abstract: A polish rod jack system for an oil well pumping units that utilizes a sucker rod; incorporating a hollow hydraulic ram to raise and lower the sucker rod string; hoses and tubing to connect the hydraulic ram to a remote manifold and in turn to a hydraulic pumping source; a hydraulic and electric switchgage to stop a prime mover in the event of pumping unit and system malfunctions and or failures; quick-disconnect fittings to facilitate connection and disconnection of the hydraulic ram from the system when the well is being serviced and to allow rapid connection and disconnection of a hydraulic pump at the remote hydraulic manifold to allow the bottom hole pump to be respaced and fine tuned while the pumping unit is in operation to maximize production.

Abstract: A composite carrier bar for oil well pumping units that utilize sucker rod to operate bottom hole pumps, including a recessed cavity for receiving a hydraulic ram to operate as a polish rod jack and also including a secondary carrier bar for receiving a secondary polish rod clamp for use in respacing bottom hole pumps and serve as a safety clamp during operation.

Abstract: A pair of proximally spaced parallel rotors, the proximal area between the rotors defining a center position containing a center line extending through both rotary axes of the rotors, a plurality of circumferentially spaced magnets of alternating polarity around each rotor and a shielded electromagnet having a pole tip in the center position intercepting the center line, and means for alternating the polarity of the electromagnet as each pair of opposed magnets of like polarity on opposite rotors move through the center position, in order to magnetically draw the magnets approaching the center position and repel the magnets leaving the center position.

Abstract: A brush and ring distributor for controlling the primary circuit for distributor ignition systems of internal combustion engines, comprising a rotating segmented slip ring having one contact segment and two breaker segments per engine cylinder, used in conjunction with two carbon graphite type brushes mounted in a brush holder mounted to a conventional type point plate with electrical connections between the bottom brush and the point plate and electrical connections between the top brush and a coil and condenser. The two brushes running on the segmented slip ring contact a common segment and close the primary circuit. As the slip ring rotates the brushes contact separate breaker segments and lose contact with the common segment, opening the primary circuit.

Abstract: A slope landing compensator system for allowing helicopters with air/oil strut type landing gear to land on inclined surfaces while maintaining the air frame in a more upright attitude, comprising two pressure responsive valves, an interconnecting line with a conventional on/off valve between the two valves. A pressure responsive valve is mounted to each of the main landing gear struts with an interconnecting line between the two so that during landing on an inclined surface, as the up slope gear touches the surface and as the strut compresses the internal pressure travels across to the down slope strut until the up slope strut has compressed to a predetermined pressure at which time pressure is sufficient to close the pressure responsive valve of the up slope strut to give firm support and so that all the pressure is not transmitted to the down slope strut and allow the up slope strut to bottom out.