Flow indicator with weight biasing means

Claim 1

A fluid flow meter adapted to provide a visual indication of the fluid flow rate through said flow meter, said flow meter having a housing and being of the type which imparts a rotation to a shaft in response to a variation in the flow rate through said flow meter, said flow meter further comprising indicator means operably connected to said shaft and adapted to give a visual indication of the rotational position of said shaft; means biasing said shaft in a direction opposite to that produced by fluid flow through said flow meter, said biasing means comprising a pulley mounted on said shaft; a weight, and an elongated flexible member having one end secured to said pulley and the other end secured to said weight, the length of said flexible member being such that said weight is suspended by said flexible member through substantially the entire fluid flow range of said indicator means, a channel guide secured to said housing and adapted to receive the weight therein to guide said weight along a substantially vertical axis, and an electrical switch disposed on a plug, said plug being removably mounted in a bore in said housing at the base of said channel guide and including an abutment surface which cooperates with an abutment surface in said bore to thereby vertically position said plug, and wherein said switch further comprises a first resilient contact and a second contact, said contacts having at least a portion of each contact in vertical alignment with the other, wherein at least one of said contacts is disposed under said weight so that said weight engages said last mentioned contact at the lowermost vertical position of said weight and depresses said last mentioned contact to thereby actuate said switch.