US Patent: 2,729,458
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| Coupling structure
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Patentee:
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| Elmer P. Sacrey (exact or similar names) - Syracuse, NY |
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Patent Dates:
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| Applied: |
Dec. 22, 1952 |
| Granted: |
Jan. 03, 1956 |
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Jeff Joslin
Vintage Machinery entry for Rockwell Mfg. Co.
Vintage Machinery entry for Porter-Cable Machine Co.
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Description: |
| "This invention relates to coupling structure, and more particularly to a coupling structure for joining two machine elements which rotate at high speed and which have to run true with great accuracy. An example of such an arrangement is the coupling of material cutting bits to the power shaft of routers of the type disclosed in patent 2,613,704..." The proposed "coupling structure", i.e., collet, replaces the usual screw threads with "male and female members having complemental cam surfaces which are particularly economical to machine or form, and which function, when the members are joined, to provide a coupling of great precision, whereby the parts joined by the coupling structure"—the router shaft and the cutting bit—"run true with great accuracy." |
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