Abstract: A switch (13) is provided with a common actuator (38) which is movable through successive discrete positions (47) for effecting successive circuit closures between a common circuit portion (21) and a selectable one of a plurality of conductors (20). In any selected position of the actuator, a deformation of the actuator, without changing its selected position, effects a further discrete circuit closure (58, 57) to indicate that an actuator position has been selected. These closures are advantageously utilized in a telephone station set environment to control a dialed digit display and to enable registration of a sequence of dialed digits for subsequent transmission.

Abstract: A microphone (11) is secured to one end of a unidirectionally flexible tape (12) which is removably storable in a housing (10) after passage through a tracking mechanism (13). That mechanism is part of a further mechanism (26, 37, 41) for holding an exiting portion of the tape in the angular orientation assumed by the tape at the end of a removal operation.

Abstract: Beam machining methods are disclosed for adjusting the inductance of an inductive device having a core that substantially encloses coil means, and establishes a centrally located air gap. The inductance is adjusted by utilizing a high energy beam for machining a terminating end region of an inwardly extending core leg portion, the end face of which in part defines the air gap. By modifying the geometrical dimensions of the leg portion end face, the reluctance across the air gap may be readily changed by an amount that produces the desired value of inductance exhibited by the device when energized. The disclosed methods advantageously obviate the need for a tuning slug associated with the air gap, and eliminate the need for machine grinding the air gap-defining leg portions of the core prior to the assembly of the device.