Abstract: An apparatus is adapted to prevent the theft of a wheeled vehicle having air brakes (e.g., large trucks and buses). A brake valve is selectively actuated by linear movement of an exposed knob that is located adjacent a supporting structure in the cab, and a valve housing is mounted behind the supporting structure. A new structural base is permanently connected to the valve housing in an exposed position in the vehicle's cab. The base is normally accessible to the driver at all times, but it is thin enough so that it will not interfere with normal push/pull movement of the valve's knob. A rigid and generally hollow cover is adapted to be selectively suspended over and in contact with the structural base. The cover is sufficiently deep as to envelop the valve's knob in order to conceal it and render it inaccessible when the cover is suspended over the base. The cover is selectively removable from the base so as to permit the driver to remove the cover and thereby have access to the knob.

Abstract: A computer-based system is disclosed for monitoring and controlling the takeoff and landing of aircraft from an airport that is large enough to require the services that are routinely associated with operations at a control tower. Individual air traffic controllers continue to have the responsibility for monitoring aircraft that are within the operations zone of their tower. But when responsibility for a given aircraft is to be transferred from one controller to another, an icon in each of two separate arrays on a computer screen is sequentially selected by the transferring controller. The first selected icon represents the aircraft; the second selected icon represents the new controller. Other icons give certain control functions (e.g.

Abstract: A mirror assembly adapted to be rotatably mounted with respect to a support structure such as a wheeled vehicle of the class that includes trucks, tractors, large recreational vehicles, etc. A rotatable housing carries a mirror and there is a fixed mounting bold for supporting the housing. A motor is connected to the housing so as to rotate it when power is applied to the motor. A clutch is associated with the motor in order to preclude damage if power is applied to the motor but the housing is incapable of moving. The clutch includes two pairs of metallic spring washers which are of the Belleville type and which have concave faces. The two washers of each pair are in contact and are oriented in the same direction, so that there is a substantial area of metal-to-metal contact between the washers of each pair of washers. A lubricant such as graphite is interposed between the pairs of Belleville washers.