Automatic start and shut-off apparatus for magnetic-tape sound recorder

摘要

In a magnetic-tape sound recorder including mode-selecting and selected mode holding means for selecting a desired mode out of a plurality of modes of operation and holding the selected mode until the mode is to be cleared, an automatic start and shut-off apparatus comprising locking means for holding the operational component parts of the recorder in a locked condition until the locking condition is automatically terminated. Also provided in the apparatus is an unlatching means operative to clear the selected mode in the mode-selecting and selected mode holding means. Motion translating means between the locking and unlatching means holds the unlatching means disengaged from the mode-selecting and selected-mode holding means when the locking means is operative to hold the operational component parts in the locked conditions. Unlocking means connected to the unlatching means and engageable with the locking means is driven in response to (1) a first signal for making the locking means inoperative by the unlocking means and (2) a second signal for clearing the selected mode of operation in the mode-selecting and selected-mode holding means. The operational component parts include a pressing roller associated with the capstan for driving the reels carrying the magnetic tape so that the pressing roller is spaced apart from the capstan when the locking means is held operative.