| 968 / | HD | HOROLOGY |
|
| 524 | DD | DRIVING MECHANISMS FOR CLOCKS BY MASTER CLOCKS [G04C 13/00] {2} |
| 525 | DD | .~ Circuit arrangements; electric clock installations [G04C 13/02] {5} |
| 534 |  | .~.~ Master clocks [G04C 13/04] {4} |
| 535 | DD | .~.~.~> Monitoring or controlling master clock or system with more than one master clock, e.g., for switching over to standby motor or power system, etc. [G04C 13/04B] {2} |
| 538 | DD | .~.~.~> Provided with supplementary means for setting or changing the time indication of the slave clocks [G04C 13/04C] {2} |
| 541 | DD | .~.~.~> Arrangements for generating normal driving pulses (generating timing pulses in general subclass 817) [G04C 13/04D] {3} |
| 545 | DD | .~.~.~> Contact devices (for simultaneously winding several clocks subclass 426) [G04C 13/06] {1} |