(under subclass 10) Composite spring motors having means for showing the degree to which the springs of the motors are wound or for operating an indicator when the springs need winding.
SEE OR SEARCH THIS CLASS, SUBCLASS:
6+, for composite weight motors having winding means some of which include indicating means.
36, and 44, for means combined with single weight and spring motors respectively for indicating the need for winding or the degree to which the motor has been supplied with potential energy.
SEE OR SEARCH CLASS
368, Horology: Time Measuring Systems or Devices, 210+, for winding indicators as included in time measuring instruments.
