US Patent: 4,559,714
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| Pitch Measuring Apparatus
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Patentee:
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| Randall J. Wright (exact or similar names) - Brookfield, WI |
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Patent Dates:
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| Applied: |
Feb. 15, 1983 |
| Granted: |
Dec. 24, 1985 |
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Joel Havens
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Description: |
| Abstract
A pitch measuring device for measuring the deviation of one line or plane from a referenced line or plane. The device comprises a pitch vial including a cavity containing a liquid and a bubble hermetically sealed therein. Indicia, pre-calibrated to the axis of the vial body, are applied to the vial body to provide a visual display of the amount of pitch of a measured surface by reference to bubble position in the vial cavity in relation to the body indicia. The vial cavity is symmetrically disposed about the vial axis with a larger radius at one end than at the other of the vial to provide pre-selected bubble orientation in response to selected pitch conditions.
This patent and patent #4463501 were found on a Sears Craftsman level model # 9-39882. |
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