US PATENT SUBCLASS 968 / 590
.~.~.~ Provided with means for sheeting off or temporarily stopping the signal [G04C 21/20F]


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968 /   HD   HOROLOGY

580  DD  PRODUCING ACOUSTIC TIME SIGNALS BY ELECTRICAL MEANS (for mechanical clocks or watches subclasses 225 and 243) [G04C 21/00] {3}
588  DD  .~ Producing the signals at adjustable fixed times [G04C 21/16] {7}
589  DD  .~.~ By mechanically unlocking an electromechanical vibrator, e.g., actuated by the leakage flux of the electric driving means, etc. [G04C 21/18] {1}
590.~.~.~ Provided with means for sheeting off or temporarily stopping the signal [G04C 21/20F]