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US Patent: 3,487,306
Instrument for Checking Energization of Solenoid Valves and Position of Valve Plunger
Patentee:
William D. Harmer (exact or similar names) - Fond Du Lac, Fond Du Lac County, WI

USPTO Classifications:
324/133, 324/258, 324/67

Tool Categories:
electrical devices : electrical measuring apparatus

Assignees:
Giddings & Lewis, Inc. - Fond Du Lac, Fond Du Lac County, WI

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Oct. 04, 1965
Granted: Dec. 30, 1969

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.
Description:
Abstract:

A compact portable instrument for checking the operating condition of solenoid valves without exposing the electrical circuitry of the valve or dismantling the valve.

The instrument includes an indicator meter and a pair of axially aligned pickup coils which may be placed substantially adjacent the valve solenoids, the pickup coils each being capable of utilizing a magnetic field produced by an adjacent energized solenoid to produce a current causing said meter to indicate the location of the energized solenoid and position of the valve plunger.

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