US Patent: 2,312,839
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| Flame Hardening Of Rack Bars
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Patentees:
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| Alfred Kullman (exact or similar names) - Cincinnati, Hamilton County, OH |
| Thomas A. Waltz (exact or similar names) - Cincinnati, Hamilton County, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 15, 1941 |
| Granted: |
Mar. 02, 1943 |
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Joel Havens
"Vintage Machinery" entry for American Tool Works Co.
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Description: |
| Claim:
This invention relates to the flame hardening of racks or rack bars for the purpose of hardening the teeth which constitute the rack so as to make them more capable of withstanding wear during usage. Racks of the type to which the invention is particularly applicable are those used on lathes and similar machine tools. In a lathe, for example, the rack is used as means for driving the carriage. This invention contemplates a method and apparatus by which the teeth of the racks may be hardened in order that the teeth may be wear resistant, capable of withstanding my abuse to which they may be subjected, so that more satisfactory performance is obtained from the tool or apparatus of which the rack bars form a part. |
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