US Patent: 3,487,306
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| Instrument for Checking Energization of Solenoid Valves and Position of Valve Plunger
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Patentee:
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| William D. Harmer (exact or similar names) - Fond Du Lac, Fond Du Lac County, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 04, 1965 |
| Granted: |
Dec. 30, 1969 |
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Joel Havens
"Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.
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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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