(under subclass 47) Control systems including additional means whereby the valve or valves may be manually operated.
(1) Note. Manually operated means to modify the response setting of the speed responsive means or to reset the trip latch, are not deemed to constitute a manual control within the definition of this subclass. However, if the manual reset means also actuates the valve or valves, the device would be considered as being manually operated for classification herein. See the class definition, section 3, for search notes on combined automatic and manual control means for fluid handling systems, and Section 5, for a listing of manual control, resetting and adjusting devices in this class.
(2) Note. The term "manual" as used herein includes both hand and foot actuated means.
(3) Note. This subclass includes manual valve actuating means in which a speed responsive device become effective at a predetermined speed of the engine or vehicle, either (1) to disconnect the mechanical movement of the manual actuator, and in some instances also to operate a trip mechanism to permit a biasing means to close the valve, or (2) to act as a limit stop to prevent further valve opening by the manual actuator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
57, for excess speed responsive control, and see the search notes thereto.
SEE OR SEARCH CLASS 73, Measuring and Testing,
513, for a speed responsive device combined with manual control.
