Abstract: An automotive shifter interlock in which a slidable shift lever release member is mechanically locked in a shift-release-inhibit position by the combination of an electromagnet bolt and an ignition switch bolt. The ignition switch bolt mechanically locks the electromagnet bolt in a position locking the shift lever release member even though no power is supplied to the electromagnet. After the ignition switch is closed and the ignition switch bolt withdrawn, the electromagnet continues to provide an electromagnetic lock until the brake pedal is depressed.

Abstract: A holding device and a transmission shift interlock mechanism employing the holding device. The holding device is intended to immobilize a cable and includes a generally cylindrical electromagnet with a central passageway extending therethrough and a holding assembly comprised of a ferromagnetic body joined to a tubular non-magnetic stem. The ferromagnetic body and stem have a passageway therethrough and the stem passes through the central passageway of the electromagnet. The cable passes slidably through the stem and a stop collar is secured to the cable immediately forwardly of the stem for abutting coaction with the forward end of the stem.

Abstract: A bobbin assembly provides means for mounting two coils in concentric relationship with one another for use in electrical devices such as solenoids, relays, and transformers. The bobbin assembly comprises inner and outer hollow, cylindrical spools each having a coil of wire wound thereon prior to being assembled with one another by moving the inner spool into the hollow interior of the outer spool. Alignment members extending axially from the inner and outer spools engage one another to maintain the spools in their concentric relationship and also provide wire guide means routing the ends of the coil wires away from the spools and terminating them in a manner facilitating connection of the coils to associated electric circuits.

Abstract: An automotive shifter interlock in which a slidable shift lever release member is mechanically locked in a shift-release-inhibit position by the combination of an electromagnet bolt and an ignition switch bolt. The ignition switch bolt mechanically locks the electromagnet bolt in a position locking the shift lever release member even though no power is supplied to the electromagnet. After the ignition switch is closed and the ignition switch bolt withdrawn, the electromagnet continues to provide an electromagnetic lock until the brake pedal is depressed.

Abstract: An electronic transmission shifter interlock system in which an electronic module is mounted directly on a shift lever for pivotal movement therewith. The module contains two electromagnetic devices which operate on the spring-biased, shift lever core rod to control the PARK lock release so as to inhibit and/or enable operation of the shift lever according to the status of the ignition lock and the position of the brake pedal. The interlock module is electrically coupled with the ignition lock to prevent the ignition key from being removed while the shift lever is other than the PARK position.

Abstract: In an electromagnetic interlock of the type in which a pin engages a notched or perforated member, preload releasability is provided by configuring the contacting surfaces of the pin and notch to provide an angle of contact which is always positive. The pin and/or the notch each includes a nonvertical contact surface. In one version of the device, the notch includes an S-shaped contact surface.

Abstract: A holding device for immobilizing a cable includes a generally cylindrical electromagnet with a central passageway extending therethrough and a holding assembly comprised of a ferromagnetic body joined to a tubular stem. The ferromagnetic body and stem have a passageway therethrough and are disposed so that the stem passes through the central passageway of the electromagnet. A cable which passes through the passageway of the stem and affixed thereto is immobilized when the electromagnet is activated.