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G01N 9/18 (2006.01) H01M 10/48 (2006.01)
Patent
CA 1145155
Case 3756 ELECTRONIC BATTERY HYDROMETER W/ANALOG OUTPUT ABSTRACT OF THE DISCLOSURE There is disclosed a battery hydrometer for providing an analog electrical signal having a magnitude related to the specific gravity of a battery electrolyte. The hydrometer includes a source of radiation for providing a detectable beam of radiation and a piston member arranged to be submerged within the electrolyte and to intercept and modulate the beam of radiation in response to the specific gravity of the electrolyte. The piston member is suspended within the electro- lyte by a spring which exerts a compressive force upon the piston member against which the electrolyte must act. The hydrometer further includes a radiation detector aligned with the radiation source for providing an analog electrical signal having a magnitude responsive to the modulated beam of radiation.
385284
Illinois Tool Works Inc.
Meredith & Finlayson
LandOfFree
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