.~ Synchronizing in response to sensed difference in positions
DEFINITION
Classification: 91/171
(under subclass 170) Apparatus having separate means to control the working fluid to two working members and additional means to sense the difference in distances traveled by the working members from a starting point and to affect the first means in a manner to decrease the difference in said distances.
(1) Note. Means to sense angular displacements between rotating plural shafts driven by separate working members have been excluded and have been classified in subclass 412 as speed sensing devices.
(2) Note. Included are patents claiming structures wherein one working member is controlled to follow-up another.
SEE OR SEARCH THIS CLASS, SUBCLASS:
412, for means (e.g., a differential) to control a working member in response to a sensed difference in angular positions of two shafts, one of which is rotated continuously by said working member.
