US Patent: 4,074,177
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| Methods and Apparatus for Automatic Movement of a Member to Precisely Indexed Positions Despite Signal Drift or Offset
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Patentee:
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| Eugene A. Olig (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: |
Jul. 17, 1975 |
| Granted: |
Feb. 14, 1978 |
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Joel Havens
"Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.
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Description: |
| Abstract:
Methods and apparatus by which a member is moved automatically to any one of a plurality of predetermined positions each of which is precisely established by guiding lock-up means such as a shot pin, and characterized in that inaccuracy of a feedback signal representing actual position of the member is determined prior to each movement toward a different position to create a correction signal used during subsequent repositioning so that the lock-up means will engage when such different position is reached. |
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