Abstract: A rearview mirror positionable by remote control including a housing having a mirror that is held in an open side thereof and that is moveable to desired viewing positions. A plurality of mirror positioning rods displaceable longitudinally relative to the housing have their respective ends connected pivotally with the back of a plate that supports the mirror. Electric motors inside the housing are connected through a compact arrangement of speed reducing gears to drive transmission pinions for displacing each rod and for retaining the rod in adjusted position. Each pinion has a peripheral series of undulations held normally in meshed engagement with a series of undulations along a side of each rod to provide for displacement of the rod upon rotation of the pinion.

Abstract: A liquid measuring device for dispensing measured volumes of liquid from a source of liquid under pressure is disclosed and includes a cylinder, a free piston for reciprocal traveling in the cylinder. In accordance with the present invention, the piston has a specific gravity that is adjusted to approximately match the specific gravity of the liquid thus improving the precision and accuracy of the dispensing device.

Abstract: A nuclear radiation attenuator for providing a test image from a source of radiation is disclosed. The attenuator provides a test image including a plurality of discrete target images located in a background image. Each target image has an intensity that differs from the intensity background image to provide a target to background contrast ratio for each target image. A plurality of the target images each have a different contrast ratio so that the contrast ratios of the target simulate contrast ratios found in clinical testing. The attenuator provides a standardized test image that enables the performance of a scintillation camera to be tested routinely.