(under subclass 67) Apparatus in which the control means is actuated by a clock mechanism or the like, operated independently of all other parts of the system.
SEE OR SEARCH CLASS
137, Fluid Handling,
624.11+, for a valve controlled by a clock mechanism.
431, Combustion,
86, for a device specialized to combustion, controlled by a manually started timer or retarder or by a time of day device.