Abstract: An adjustable tool to reliably retain and accurately align annular seals of varying diameter for installation in a hub, housing, or similar component, at an axle or shaft of a motor vehicle. The tool includes a drive dish upon which a seal is received and to which an impact force is applying by way of an elongated handle, so as to cause the seal to be installed. The tool also includes a seal retaining assembly to be moved radially over the drive dish and into engagement with the seal so that said seal is centered and retained on the tool to facilitate installation.

Abstract: A focusing system for closed circuit video cameras. A carrier block to which the image sensing device is attached is moved parallel to the lens axis for focusing images at close range because of the use of lenses normally focused at infinity or changes of focus required by system tolerances. The carrier block motion is accomplished by the use of two cams on a single shaft. The cams press against the carrier block and move the carrier block on guide rods as the cam shaft is turned. In order to attain two focusing ranges, the cam shaft itself is located within two pivoting saddles rather than being fixed. The saddles pivot on a fixed shaft which permits the entire focusing mechanism to be moved in one step between two preset positions. Each of the two positions is selected to be appropriate for one of two lenses.