US PATENT SUBCLASS 968 / 115-- .~.~ By displacement of devices carried by the pendulum or by adjusting the pendulum length (pendulums and suspension subclass 105; self-adjustment of the regulating lever subclasses 122, 123, and 509; adjusting the stroke of the pendulum subclass 123; indicating by acoustic means subclass 217; synchronization with a standard clock subclass 509; metronome with a variable length subclass 821) [G04B 17/12B]

US PATENT SUBCLASS 968 / 115
.~.~ By displacement of devices carried by the pendulum or by adjusting the pendulum length (pendulums and suspension subclass 105; self-adjustment of the regulating lever subclasses 122, 123, and 509; adjusting the stroke of the pendulum subclass 123; indicating by acoustic means subclass 217; synchronization with a standard clock subclass 509; metronome with a variable length subclass 821) [G04B 17/12B]

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}
114	DD	.~ Setting the frequency [G04B 17/12] {3}
115		.~.~ By displacement of devices carried by the pendulum or by adjusting the pendulum length (pendulums and suspension subclass 105; self-adjustment of the regulating lever subclasses 122, 123, and 509; adjusting the stroke of the pendulum subclass 123; indicating by acoustic means subclass 217; synchronization with a standard clock subclass 509; metronome with a variable length subclass 821) [G04B 17/12B]