Abstract: A spring-loaded pin-guided magnetic tool which is particularly well adapted for the lifting of hydraulic valve lifters from their bores in an OHV engine. An elongated tube has a magnet affixed to one end and is inserted into the engine block. The magnet is guided into place with spring-loaded, retractable guide pin. By extending the guide pin into the bore and guiding it into a recess on the top of a valve, the magnet can be placed very close to the center of the lifter. The placement of the magnet improves the precision of the tool because a user can be reasonably certain the magnet end of the tool is located at the bottom of a recess in a lifter. An collar is positioned along the tube allowing it to rest against the head and hold the magnetic end of the tool at a proper height.

Abstract: A braking device for an elevator is disclosed. The device may include a motor, a braking system, a first switch, and a second switch. The motor may be capable of generating a counter-electromotive force. The braking system may move to a disengaged position upon being energized and may move to an engaged position upon being de-energized. The first and second switches may have an open state. In the open state, the switches electrically couple the motor to the braking system so that the counter-electromotive force of the motor may energize the braking system.