| 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 |  | .~ 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} |
| 591 | DD | .~.~> By closing a contact to ring an electromechanical alarm [G04C 21/20] {4} |
| 596 | DD | .~.~> By closing a contact to put into action electro-acoustic means, e.g., awakening by music, etc. [G04C 21/28] |
| 597 | DD | .~.~> With provision for a number of operations at different times, e.g., ringing the bells in a school, etc. [G04C 21/30] {3} |
| 602 | DD | .~.~> Devices on watches or similar portable timepieces [G04C 21/34] |
| 603 | DD | .~.~> Signal-repeating devices [G04C 21/36] |
| 604 | DD | .~.~> Adjusting the duration of signals [G04C 21/38] |