Abstract: An indication element driving device is incorporated within a tuning apparatus. The driving device comprises a casing of a substantially cylindrical shape with both end faces covered, a driving shaft is rotatably supported passing through the covered end faces of the casing and is adapted to be selectively shifted in its axial direction to a first and second position, and briefly rotated upon a tuning operation. A flywheel disposed coaxially with the driving shaft inside the casing and supported rotatably with respect to said driving shaft. A pulley disposed coaxially with driving shaft at an extended part thereof extending and projecting outside the casing has fine cord wound therearound. A first clutch is operable when the driving shaft is set to the first position, a second clutch is operable when the driving shaft is set to the second position.

Abstract: An electric locking device comprising a plurality of manipulative control switches, a presetting mechanism having a plurality of variable connecting mechanisms capable of selectively varying and presetting connected states with respect to the manipulative control switches, a relay circuit including a plurality of relays respectively connected to the variable connecting mechanisms and being successively supplied with electric power when the manipulative control switches to which the variable connecting mechanisms are selectively connected are closed in a specific sequence, the relays being so connected that, as a result of energization of one relay, a relay switch of that one relay closes, whereby the succeeding relay in the specific sequence assumes an energizable state, and, at the same time, the relay switch assumes a lock-up state, and a circuit operated by the energization of the final relay in the specific sequence of the relay of the relay circuit to cause a locking mechanism to perform an unlocking ope