US Patent: 2,875,629
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| Adjustable Off-Center Drill Holder
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Patentee:
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| John E. Poorman (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 19, 1956 |
| Granted: |
Mar. 03, 1959 |
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Joel Havens
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Description: |
| Claim:
In the usual drill holder for use with turrets of drill presses, the holder comprises a housing having a shank adapted for mounting in the chuck in the turret and journalling a shaft having a drive element such as a bevelled gear at one end and a socket chuck for receiving a tool, such as a drill, at the other end. These holders support the drills in on-center positions only. It is frequently desirable, however, to drill holes in off-center positions and this involves a great deal of adjustment of the drill press or like machine or the work holder or both which is time consuming and often results in inaccurate work. |
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