(under the class definition) Subject matter wherein the valve is provided with an actuator including a tracer element which is designed to contact a pattern.
(1) Note. This type of actuation is usually used in duplicating machines wherein the pattern is the shape of the article to be made and the valve is the control subcombination of the duplicating machine.
SEE OR SEARCH CLASS
91, Motors: Expansible Chamber Type,
37, for expansible chamber motors controlled by a pattern or template controlled valve.
