Abstract: Scanning apparatus is provided for a movable array of highly focused collimators surrounding a scan field.

Abstract: A device for latching a sliding door member in place against a stationary frame structure includes an elongated hasp mountable on the door and engageable with a keeper secured to a bracket on the frame with which the hasp engages preventing it from moving laterally outwardly. A pair of cam elements are pivotally mounted on the bracket for movement about a common axis above the hasp, and have flat end surfaces directly overlying an end edge of the hasp for latching it against vertical upward movement. A stop pin on the bracket below such common axis engages with the cam elements for permitting one of them to pivot in only one direction while permitting the other cam element to pivot in only an opposite direction so that the hasp remains latched against vertical upward movement by one or the other of the cams even when subjected to forces having a tendency to cause the cams to pivot in either such direction.

Abstract: a latching device includes a pair of spring projected latch bolts located within a housing and movable outwardly of one end wall thereof for engagement with detents of a pair of doors to be latched in a closed position. A rod extending at one end thereof outwardly of an opposite wall of the housing has a handle at such one end and a transverse bar at an opposite end which engages a pair of lugs provided on the bolts, so that the doors may be unlatched as the handle is pulled from inside the housing so as to move the bar toward the opposite end wall of the housing thereby effecting bolt retraction. A notch is provided on the rod for engagement with a portion of the opposite end wall of the housing for maintaining the bolts in an unlatched position, and bolt guides are provided in the housing in the form of passageways of rectangular cross-section for preventing the bolts, having flat outer surfaces lying parallel to the walls of the passageways, from rotating about their central axes.