Recorders wherein there is a record receiver utilizing a time driven element to receive a mark, or wherein a time driven element is utilized to control the application of a mark to the record receiver, with which receiver is adapted to cooperate an implement, normally independent of the recorder, and which implement is solely under control of an operator except that the recorder is provided with an opening over the record receiver to delimit the area in which a record may be made.
SEE OR SEARCH THIS CLASS, SUBCLASS:
19, for autograph recording combined with other recording.
20, and see the notes thereto for timing subclasses in this class.
