US Patent: 1,309,489
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Double-Gyro Inclinometer
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Patentee:
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Lawrence B. Sperry (exact or similar names) - Brooklyn, NY |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Apr. 18, 1918 |
Granted: |
Jul. 08, 1919 |
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Ralph Brendler
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Description: |
This is an inclinometer that uses a gyroscope to set the level, making it suitable for use in airplanes. |
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