Abstract: An improved cable control mechanism for releasing a hydraulic locking device by an operator from a remote location is provided with a clamping mechanism for quickly attaching one end at the control cable to the output lever assembly at the proper point for reliable operation of the device without prior measurement of the cable length. The clamping lever also covers the sharp free end of the cable to avoid injury to maintenance personnel. Other improvements disclosed include separate retaining clips for more conveniently mounting the output lever assembly to the locking device and for attaching the cable conduit to the output lever assembly.

Abstract: A mechanical lock normally preventing axial motion of a rod with respect to a housing sleeve that surrounds the rod includes a coil spring whose diameter is slightly less than the diameter of the rod so that the coil spring normally encircles and grips the rod tightly. The coil spring is mounted on the rod between a bushing fixed to the housing sleeve at one end of the spring and a second bushing that is rotatable with respect to the housing at the other end of the spring. The rotary bushing is rotated by an actuating lever to unwind the spring so as to increase its diameter and thereby to release its grip on the rod. Both the fixed bushing and the rotatable bushing include beveled faces which permit the last few turns at both ends of the spring to become cocked on the rod to provide a true locking engagement with the rod.

Abstract: A control mechanism for use with a hydraulic locking device to permit the device to be unlocked under control of an operator. The control mechanism includes a lever assembly fastened to the piston rod of the hydraulic control device and connected by a cable to a remotely located push button assembly. When the operator presses the push button, the cable is drawn causing the lever assembly to move an operating rod of the hydraulic locking device to a release position thereby unlocking the device. The lever assembly can be installed on the hydraulic locking device without the use of tools by sliding a spring clip which is a non-removable portion of the lever assembly. A threaded collar permits the effective length of the conduit to be altered to adjust the stroke of the mechanism. The spring cip is made to serve a dual purpose.