| 968 / | HD | HOROLOGY |
| 2 | DD | DRIVING MECHANISMS (driving mechanisms for Turkish time subclass 167; driving mechanisms in the hands subclass 396; driving mechanisms for phonographic apparatus G11B 19/00; springs, driving weight engines F03G; driving mechanisms for cinematography G03B 1/00; driving mechanisms; driving mechanisms for time fuses for missiles F42C; driving mechanisms for toys A63H 11/23) [G04B 1/00] {4} |
| 7 | DD | .~ With mainspring (synchronous motors with power reserve subclass 559; springs in general F16F) [G04B 1/10] {6} |
| 18 | | .~.~ Compensation of changes in the motive power of the mainspring (by mechanical shaping of the mainspring subclass 10; automatic regulation of the pendulum subclass 115; of the regulator subclass 211) [G04B 1/22] {1} |
| 19 | DD | .~.~.~> With the aid of an interposed power accumulator (secondary spring) which is always tensioned (winding up several mainsprings or driving weights simultaneously subclass 28) [G04B 1/22B] |