Device for counting rotations
AssigneeSappel
InventorsDaniel Brinster, Eric Perrin
Life of this patent
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Abstract
The invention pertains to a rotation gauge for a water meter register where the hydraulic part of the meter rotates a shaft whose revolutions are to be counted. At the other end of the shaft at least one magnet is driven by rotation by the shaft. Outside this hydraulic part, two flexible blade switches are mounted opposite the path of said magnet and connected to an electronic circuit which provides a register with metering pulses. The metering pulses are characterized by the fact that each of triggered by the closing of the first flexible blade switch and stopped by the closing of the second switch. The second switch is closed substantially in the middle of the period during which the first remains closed.
Claims7
A fluid meter comprising, a hydraulic part of a meter and a non-hydraulic part,
- wherein the hydraulic part comprises a shaft connected to a volumetric wheel driven by fluid passing through said meter and by at least one magnet driven by rotation of said shaft, and
- wherein said non-hydraulic part comprises, two flexible blade switches mounted opposite the path of said magnet and connected to an electronic circuit which counts their closings of said switches to provide a register with metering pulses,
- whereby the switches are so aligned that each of said metering pulses is triggered by the closing of a first flexible blade switch and stopped by the closing of the other switch and the other switch is initially closed substantially in the middle of the closed period of the first.
Dependencies are inferred from the claim text.