Abstract: An apparatus for promoting desired sand distribution into a mold flask in a foundry process, comprising a proximal distribution plate mounted subjacent a hopper, a distal distribution plate slidably mounted subjacent the proximal distribution plate, and a masking plate assembly mounted subjacent to the distal distribution plate. The proximal distribution plate includes a series of primary apertures, while the distal distribution plate includes a series of repeating secondary apertures therethrough, with each series of secondary apertures corresponding to one primary aperture. The masking plate assembly includes a masking plate having a series of masking plate bores traversing therethrough, with each masking plate bore corresponding to each secondary aperture. Each masking plate bore includes a principal diameter extending through the masking plate, with the principal diameter determining the flow rate of sand through the masking plate.

Abstract: A sand level sensing and distribution apparatus for monitoring and controlling the quantity of sand distributed from a batch hopper into a mold flask includes a sensor assembly connected to a level actuating assembly via a carriage assembly. A window is mounted within one wall of the batch hopper such that the sensor assembly may be used to monitor the level of sand within the batch hopper. The level actuating assembly is proximate the batch hopper, and the sensor assembly is therefore proximately positioned by said window. A control unit is included to receive the monitored signal from the sensor assembly, and, using such information, to control the operation of the level actuating assembly in positioning the sensor assembly to distribute the desired amount of sand into the mold flask.

Abstract: A back rest construction which may be incorporated into an upholstered chair or recliner, or which may be used in a portable back rest either alone or in combination with a seat. The construction includes a frame with a vertical track carried on it and which in turn carries a lumbar support that may be moved up and down on the track. The lumbar support not only may be moved vertically to adjust its height, but in addition, it may be moved toward and away from the plane of the frame so as to decrease or increase the support provided by it.