| 968 / | HD | HOROLOGY |
| 103 | DD | MECHANISMS FOR STABILIZING FREQUENCY (magnetic subclass 497; in striking mechanisms subclass 224; stopping and regulating of the running subclass 234; electrical and thermoelectric regulating mechanisms subclass 496) [G04B 17/00] {8} |
| 125 | | .~ Compensation of mechanisms for stabilizing frequency [G04B 17/20] {4} |
| 126 | DD | .~.~> For the effect of variations of temperature (alloys with small expansion coefficient C21C, C22C; adjustment of the regulator dependant on adjustment of the hands subclass 122; depending on the difference in time with a comparison clockwork subclass 509) [G04B 17/22] {3} |
| 130 | DD | .~.~> For the effect of variations of atmospheric pressure [G04B 17/24] |
| 131 | DD | .~.~> For the effect of variations of the impulses [G04B 17/26] |
| 132 | DD | .~.~> For the effect of unbalance of the weights, e.g., tourbillon, etc. (construction of the balance subclass 110; setting the frequency by adjusting devices fixed on the balance subclass 116) [G04B 17/28] {1} |