Battery hydrometer with analog output

Patent · Tue Sep 21 04:00:00 EDT 1982

OSTI ID:6590326

Patis, B L

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 electrolyte 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.

• Assignee: Illinois Tool Works Inc
• Patent Number(s): US 4350885
• OSTI ID: 6590326
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250902* -- Energy Storage-- Batteries-- Performance & Testing
440105 -- Radiation Instrumentation-- Radiometric Instruments-- (-1987)
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ANALOG SYSTEMS
BATTERY CHARGING
BEAMS
COMPRESSION
DENSITY
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELECTROMAGNETIC RADIATION
INFRARED RADIATION
MEASURING INSTRUMENTS
MODULATION
PHOTOTRANSISTORS
PHYSICAL PROPERTIES
PISTONS
RADIATION DETECTORS
RADIATION SOURCES
RADIATIONS
RADIOMETRIC GAGES
SEMICONDUCTOR DEVICES
SIGNALS
TESTING
TRANSISTORS