Patent ID: 6275160
Filing Date: 2001-08-14
Classification: G08B

Abstract:
A multi-mode flow detection system comprising:first and second power supplying terminals;a first switching element with first and second states responsive to fluid flow to go from the first, no flow state, to the second, flow state;a second, manually settable, switching element having third and forth sates connected in series with at least a portion of the first switching element;a third switching element having fifth and sixth states, wherein a portion of the third element is coupled to one side of the second switching element wherein the first switching element is coupled to the other side thereof;a control element coupled to the first and third switching elements whereby in response to the first switching element going from the first to the second state and remaining there for a pre-determined interval the third switching element goes from the fifth to the sixth state, whereupon a short circuit connects the two terminals, until flow ceases provided that the second switching element exhibits the third state.