Abstract: A system for controlling the operation of a motor being used for the rotational assembly or dis-assembly of two members, the system comprising means monitoring, and generating a digital or analogue signals representative of the state of the two members and means relaying the representative signal in a digital form to a first processor (6) means relaying the signal in an analogue form to a second processor (11); the first processor comprising a computer which in use, digitally analyses the representative signal and is so programmed as to generate a first control signal in response to the representative signal; the second processor comprising means converting the first control signal into analogue form and means comparing it with the analogue representative signal and generating second control signal representative of the difference between the first control signal and the representative signal; the second processor being so connected as to transmit the second control signal to the motor control means.

Abstract: A dynamic balancing device for the wheel of a motor vehicle, the device comprising flexibly mounted weighting members which are driven outward by the increased centrifugal forces diametrically opposite the nonconcentric mass center to produce the desired balancing effect.

Abstract: A pumping unit for removing oil or the like from a well. The unit comprises a tower, a sump at the bottom of the tower and a reservoir at an elevation above the sump. A liquid, such as oil or water, is pumped from the sump up to the reservoir. A wheel is mounted at the top of the tower above the reservoir for rotation, and a line extends over the wheel for attachment at one end to a polished rod load outside the tower and at its other end to a receptacle inside the tower serving as a counter weight for the polished rod load.

Abstract: A shot peening process is provided for treating elongated oil well sucker rods, drill pipes and the like. In accordance with the process of the invention, the rods or pipes are passed through appropriate shot peening equipment along an arcuate path, and each rod or pipe is simultaneously rotated about its longitudinal axis. This action causes the rods or pipes to be flexed during the shot peening action. The effect of the flexing is to set the inner fibers of the rods or pipes under compression, thereby extending the fatigue resistance of the treated rods.