GB Patent: GB-304,502
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| Improvements in Grinding or Abrading Machines
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Patentee:
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| none listed (exact or similar names) - none listed, |
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Patent Dates:
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| Applied: |
Feb. 25, 1928 |
| Granted: |
Jan. 24, 1929 |
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Patent Pictures:
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1 | 2
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Espacenet patent
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Joel Havens
"Vintage Machinery" entry for Cincinnati Grinders, Inc.
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Description: |
| Abstract:
In a centreless grinding machine the work guide makes contact with the surface of the work along a helical or other inclined line so that the points of contact become progressively nearer the grinding wheel or vary progressively in some other manner as the work is traversed axially through the machine. The machine comprises a grinding wheel 5 rotated by a belt 8 and adjustable jockey pulleys 15 from a shaft 11 and a regulating wheel 19 also rotated from the shaft 11 through gearing 25, 28, flexible shaft 30 and skew gearing 32. The shaft 20 which carries the regulating wheel is supported on a pillar 22 adjustable vertically and angularly to incline the wheel and cause it to feed the work axially through the grinding throat. Two guides are provided for the work, the front one 38 serving merely to keep the work between the wheels whilst the rear one 40 maintains it in proper relation to the grinding wheel. The guides are adjustable to and from the work by hand-operated screws 42, 44 and are mounted on slides 37, 39 carried by a bracket 36 on a slide 33 which is vertically adjustable by a rack 34 thereon and a pinion operated through gearing from a hand wheel 35. The guide 40 has a workengaging surface which changes progressively from the tangent 46, Fig. 3, at the commencement of the grinding operation to the tangent 47 at the termination thereof, the former being inclined to a horizontal line preferably at an angle of 58º whilst the latter is inclined at 39º so that the point of contact with the work becomes progressively nearer to the grinding wheel 5. The line of centres of the grinding and regulating wheels may be horizontal instead of vertical as shown, in which case the second guide 38 is dispensed with. |
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