TREA

Producing acoustic time signals by electrical means

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Industry

  • CPC
  • G04C21/00
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Parent Industries

GPHYSICS G04Horology G04CELECTROMECHANICAL CLOCKS OR WATCHES

Current Industry

G04C21/00Producing acoustic time signals by electrical means

Sub Industries

G04C21/02Constructional details G04C21/04Indicating the time of the day G04C21/06by striking mechanism G04C21/08with snail G04C21/10with locking plate G04C21/12by electro-acoustic means G04C21/14Electro-acoustic time announcement G04C21/16producing the signals at adjustable fixed times G04C21/18by mechanically unlocking an electro-mechanical vibrator G04C21/185provided with means for sheeting off or temporarity stopping the signal G04C21/20by closing a contact to ring an electro-mechanical alarm G04C21/205by the hand(s) or handlike members closing the contact G04C21/22put into action by the arbor of a mechanical alarm work G04C21/24put into action by the spring of a mechanical alarm work G04C21/26put into action by the vibrations caused by the operation of a mechanical alarm work G04C21/28by closing a contact to put into action electro-acoustic means G04C21/30with provision for a number of operations at different times G04C21/305by the hand(s) or handlike members closing the contacts G04C21/32giving indications at a number of places each at a different time G04C21/323by the hand(s) or handlike members closing the contacts G04C21/326adjustable from the different places themselves G04C21/34Devices on watches or similar portable timepieces G04C21/36Signal repeating devices G04C21/38Adjusting the duration of signals
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