(under subclass 68) Subject matter wherein an additional electrical means is provided for resetting the valve and/or trip.
(1) Note. A usual arrangement is one wherein the additional electrical means draws the valve head back against the biasing means and wherein the latch then engages to hold the valve in the biased position until the trip is actuated.
SEE OR SEARCH CLASS
137, Fluid Handling,
66, for thermoelectric control of resetting for combustion failure responsive fuel safety cut-offs for burners and subclasses 456+ for safety cut-offs which must be reset by external means, many of these devices being of the trip type.
