Abstract: A die cart comprising a carriage adapted to be moved along track means toward and away from a press; a turntable mounted for rotary movement on the carriage and having a first load surface at one end thereof and a second load surface of the opposite end thereof; and a transfer device mounted on the turntable for fore and aft movement over the first and second load surfaces and having coupling means for engaging a die to push or pull a die positioned on either load surface onto or off of the bed of the press. The cart includes a first hydraulic motor carried by the carriage for moving the carriage along the track means; a second hydraulic motor carried by the turntable for rotating the turntable on the carriage; and a third hydraulic motor carried by the turntable for moving the transfer device fore and aft over the first and second load surfaces.

Abstract: A friction clutch for a conveyor roller bearing apparatus wherein a plurality of small thrust springs are disposed between an adjustable nut and a thrust pad to force a drive sprocket against a back-up friction pad connected to the roller axle shaft. Means such as sleeves around the springs or pins between the nut and thrust pad are provided to minimize or eliminate sideloading on the springs. The faces of the thrust and back-up pads are centrally relieved to concentrate the thrust forces in a band which corresponds with the radial locations of the thrust springs. By this arrangement a very uniform breakaway or release torque characteristic is provided about 360.degree. of relative angular travel between the components.

Abstract: A method and apparatus for automatically switching a circuit to regulate artificial light in an area. The artificial light is turned on by a person entering the area and reflecting an ultrasonic wave pattern toward a receiver. The light is turned off by a person moving into contactless proximity of a capacitance comparison circuit which utilizes the capacitance of the human body as one of the circuit elements. The ultrasonic circuit operates at different levels of sensitivity, depending upon the existing available light in the area, such as during daylight hours. Optionally, a capacitance comparison circuit may be utilized for both turning on and turning off of the artificial light.