Abstract: A novel safety lock that includes an activation device and a latching device, these devices cooperating with the cable that passes through the lock. The activation device includes a guide pulley rotatably fixed to a mounting plate, a spring loaded pressure roller adapted to press the cable into operating engagement therewith, and a series of centrifugally activated arms positioned about the axis of the guide pulley. The latching device includes a lock block fixed to the mounting plate, and a spring loaded lock wheel mounted for eccentric rotation, the lock wheel being adapted to lock the cable against the lock block then activated. A separate release lever pivotally fixed to the mounting plate is spring loaded in one direction, and a separate latch lever pivotally fixed to the mounting plate is spring loaded in an opposite direction, the latch lever having a latch pin adapted to interengage with a seat defined by the release lever when the safety lock is in the set or unactivated position.

Abstract: A cable climber safety lock is provided that includes a sensing device. The safety lock is installed above and attached to a cable climber, and the safety lock can also be attached to other types of hoists. The safety lock gradually locks onto the cable as the climber accelerates beyond a predetermined speed down the cable and the unit also senses any climber movement on the cable after power is shut off.