Abstract: A pulse sensor clip includes a body member composed of a conductive plastic. The body member includes a pair of parallel ears defining a keyhole-shaped channel therebetween for clipping onto an ignition cable. The distal end of a sensor cable extending from an engine time log is coated with a conductive adhesive, and inserted into a cable-mounting hole on the body member. A pin hole intersecting the cable-mounting hole extends between the cable-mounting hole and an exterior surface of the body member. A retaining pin is positioned in the pin hole, and driven into the sensor cable to secure it. A security wire lock can be installed through a pair of security holes on the ears to resist unauthorized removal of the sensor clip from the ignition cable.

Abstract: An adaptable engine usage meter includes engine monitoring circuitry arranged within a front housing. Three different rear housings can be interchangeably attached to the front housing. A first rear housing includes a concave back portion, so that in conjunction with a complementary concave mounting bracket, it allows the meter to be attached to a round handlebar, such as that on a push mower. A second rear housing is slightly narrower than the front housing, so that a shoulder is formed when they are attached together. The second rear housing allows the meter to be mounted on an instrument panel by fitting it through a cutout until the shoulder engages the panel. When either the first or second rear housing is used, the circuitry in the front housing is connected to the ignition wire and the ground of an engine via a cable extended through the rear housing.