US Patent: 3,406,595
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| Index Unit
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Patentee:
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| Lyell C. Tullis (exact or similar names) - Janesville, Rock County, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 13, 1967 |
| Granted: |
Oct. 22, 1968 |
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Joel Havens
"Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.
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Description: |
| Abstract:
The index table is carried on a ring gear which is indexed when a rack segment is positioned so an idler pinion on a connecting rod engages the rack and ring gear. On the return stroke and during dwell a cam moves the rack segment to inactive position and a shot-pin gear segment holds the ring. If the ring jams, a spring loaded overload arrangement withdraws the rack segment which will be returned to operation on the next index stroke. The ring gear permits a large center opening and large bearing surfaces. The ratio between the connecting rod shaft and cam shaft speed determines the portion of the cycle for indexing. The stroke of the connecting rod determines the number of indexes. |
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