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US 4,375,789 AGranted
First out indicator
AssigneeB.W.B. Controls, Inc.
InventorNed A. Bergeron
Life of this patent
Estimating the term…
Abstract
Control system for indicating which, of a plurality of sensed functions, first malfunctions. The system includes a plurality of series connected devices, each such device includes a shiftable valve which, in one position activates an indicator, and, in another position deactivates said indicator. Signalling connections link the devices such that all indicators, save the one governing the first malfunction, remain in the indicating condition they were in prior to such malfunction occurring.
Claims4
An indicator comprising:
- I. a housing having bore means substantially there through, said housing also including;
- (a) first fluid inlet,
- (b) first fluid outlet,
- (c) second fluid inlet, and
- (d) first fluid exhaust means, said exhaust means including said first fluid outlet and an exhaust port, each of said inlets, outlets and port being in communicating relationship with said bore means;
- II. Valve means slidable in said bore means between a first position permitting fluid communication between said first fluid inlet and first fluid outlet, and a second position both preventing such fluid communication as well as permitting fluid communication between said first fluid outlet and said exhaust port;
- and
- III. removable barrier means for blocking movement of said valve means from its said second position to its said first position, said barrier means being removable by fluid pressure in said first inlet and said valve means being movable from said second position to said first position upon sufficient fluid pressure in said second inlet to overcome said fluid pressure in said first inlet.
5 more elements
Dependencies are inferred from the claim text.