US Patent: 2,834,160
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| Grinding machine
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Patentee:
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| Gordon E. Lillie (exact or similar names) - Bellows Falls, VT |
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Patent Dates:
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| Applied: |
May 09, 1955 |
| Granted: |
May 13, 1958 |
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Jeff Joslin
Vintage Machinery entry for Bryant Chucking Grinder Co.
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Description: |
| "Several practical and useful systems of sizing devices for grinding and honing machines are known to the art. One such system, for example, is described in U. S. Patent No. 2,585,533, wherein a sensing element periodically enters the hole to be ground from the side opposite that where the tool enters. Such a method has certain limitations, however, particularly in the case of 'blind' holes or where the workpiece otherwise has such configuration that the gauge cannot enter or be used in the described way. In such cases, another method, commonly called 'diamond sizing,' is resorted to. This latter method is described in, for example, U. S. Patent No. 2,429,830, and is dependent on the relative position between the tool and the workpiece for control of the grinding cycle. That is, when a predetermined amount of feed movement has taken place, a suitable stop actuates, for example, a limit switch, and thereby terminates the grinding cycles and conditions the machine for the next phase of said cycle..." The invention enhances this diamond sizing method by terminating the grinding based on grinding tool pressure against the workpiece. |
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