| 105 | DD | .~ Oscillators acting by gravity, e.g., pendulum swinging in a plane, etc. (setting the pendulum to the required length subclass 115; temperature compensation for pendulums subclass 128; bearings in general, e.g., knife-edge subclass 271, etc; clocks fitted in pendulums subclass 396; imitation pendulums driven by the clock mechanism subclasses 387 and 388; pendulum ornamentation subclass 389; contacts actuated by a pendulum subclass 546; measurement of force with a pendulum G01V 7/12) [G04B 17/02] {1} |
