Abstract: An electronic combination lock uses a single pair of contacts which are connected to a door opening actuator such that a code may be input into the electronic combination lock by sequentially moving the door opening actuator in a predetermined pattern. The device is especially suitable for use in car doors such that the appearance of a conventional car door is maintained, but the ease of entry with an electronic combination lock is provided. A detecting circuit detects whether the car door pushbutton or movable handle is moved in the correct timed sequence. The initial movement of the pushbutton or door handle is used for starting a timer running and initiating the supply of power to the detecting circuit. A pulse generator outputs a series of pulses which are fed into a pulse sequencer. The pulse sequencer is used for gating the switch position (open or closed) to one of a number of parallel disposed registers in a latching circuit.

Abstract: A device is used for indicating a preset torque on a conventional torque wrench. The device has a front part and a back part, which are held together by a U-shaped bracket. The bracket serves to secure the front part and back part of the device on opposite sides of the torque wrench's dial. The device includes a battery which is electrically connected to a copper plate on the back part of the device. This copper plate electrically connects to the pointer of the torque wrench by way of the indicating plate and rod. When the pointer is deflected an amount determined by the positioning of the device on the indicating plate, the pointer will contact and electrically connect to a resilient terminal on the device. This contact will connect the battery to a circuit in the device, causing the device to generate an audible and turn on a light. A test switch is included and used for bypassing the pointer arm in determining that the circuit is still operative.