GB Patent: GB-1,155,963
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| Improvements in or relating to grinding machines
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Patentees:
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| John Cyril Jones (exact or similar names) - Altrincham, Cheshire County, England |
| John Derick Barclay (exact or similar names) - Altrincham, Cheshire County, England |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 13, 1965 |
| Granted: |
Jun. 25, 1969 |
Espacenet patent
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Joel Havens
"Vintage Machinery" entry for Churchill Machine Tool Co., Ltd.
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Description: |
| Abstract:
A grinding machine of the type in which a predetermined fall in the grinding wheel motor current produces an infeed of the grinding wheel relative to a workpiece until such reduced current is increased and restored to a predetermined value includes circuit means adapted to control the longitudinal traverse of the grinding wheel relative to the workpiece in response to such an increase in current. Thus, with a workpiece such as a roll has been worn in the middle there is a gradual fall in the grinding wheel motor current as the wheel traverses from the end of the roll to the middle of lesser diameter; when the current has fallen a predetermined amount the control circuit operates causing the wheel to move further in towards the workpiece thus producing an increase in the load current. This increase in current is utilized to stop the longitudinal traverse of the wheel, and then to reverse the direction of traverse. The full sequence of operations required to control the traverse of the wheel first to grind the tailstock portion of the roll and then the workhead portion, whilst maintaining the load on the grinding wheel substantially constant, is described in the Specification with reference to Figs. 1 to 4 of the drawings (not shown) which depict a suitable relay circuit for effecting the desired control. |
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