TREA

Indicating the time by acoustic means

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Industry

  • CPC
  • G04B21/00
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

GPHYSICS G04Horology G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS

Current Industry

G04B21/00Indicating the time by acoustic means

Sub Industries

G04B21/005Periodical acoustic signalling arrangements G04B21/02Regular striking mechanisms giving the full hour, half hour or quarter hour G04B21/022with saw mechanism G04B21/025with silent saw action G04B21/027with locking wheel G04B21/04Hour wheels Racks or rakes Snails or similar control mechanisms G04B21/06Details of striking mechanisms G04B21/08Sounding bodies Whistles Musical apparatus G04B21/10Releasing or locking the regular stroke G04B21/12Reiterating watches or clocks G04B21/14Winding-up the striking mechanism by the clockwork winding up the clockwork by the striking mechanism
Industries