| 968 / | HD | HOROLOGY |
| 73 | DD | CLICK DEVICES; STOP CLICKS; CLUTCHES (mechanisms for winding up by hand subclass 23; automatic winding up subclass 40;) [G04B 11/00] {4} |
| 74 | DD | .~ Devices in which the motion of a rotating member is limited to one direction [G04B 11/00B] {3} |
| 75 | | .~.~ With a ratchet which makes contact with the rotating member by means of teeth [G04B 11/00B2] {1} |
| 76 | DD | .~.~.~> Rotatable about a fixed axis by means of spring action [G04B 11/B2B] |