above for repairing or re-cutting worn-out rasps and files and ren dering them again fit for use and for hardening the surfaces of new flies and rasps substantially as above described. upon the shaft A substantially in the manner and for the purpose herein set forth. and employed for the purpose substantially as herein set forth. Third I claim in revolving rakes the duplicate sliding bolts. I and J arranged relatively to one or Inure pairs of reversed stops W Y and to operate suit vantially as and for the purpose herein set forth. 1 and 2 arranged relatively to bolts 1 and J and to the

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above for repairing or re-cutting worn-out rasps and files and ren dering them again fit for use and for hardening the surfaces of new flies and rasps substantially as above described. upon the shaft A substantially in the manner and for the purpose herein set forth. and employed for the purpose substantially as herein set forth. Third I claim in revolving rakes the duplicate sliding bolts. I and J arranged relatively to one or Inure pairs of reversed stops W Y and to operate suit vantially as and for the purpose herein set forth. 1 and 2 arranged relatively to bolts 1 and J and to the operative, scientific american, 64-08-06

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