US Patent: 2,353,580
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| Metalworking Machinery
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Patentees:
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| David E. Mills (exact or similar names) - Cincinnati, Hamilton County, OH |
| William H. H. Drake (exact or similar names) - Bridgetown, Hamilton County,, OH |
| Howard E. Laubach (exact or similar names) - Cincinnati, Hamilton County, OH |
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Patent Dates:
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| Applied: |
Nov. 24, 1942 |
| Granted: |
Jul. 11, 1944 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for Smith & Mills Co.
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Description: |
| Prior to this patent, shapers typically moved the ram via a mechanism passing through a longitudinal slot in the bottom of the ram. This patent describes a drive mechanism for the ram that avoids the need for that longitudinal slot. Eliminating the longitudinal slot allows the ram to be made 30% lighter in weight while also allowing the V ways to be stiffer and easier to manufacture. The new mechanism uses an external ram carrier to oscillate the ram. The ram adjustment mechanism is assembled into the ram by an opening at the front of the ram plus a small hole for the control shaft.
Claim:
The combination with a shaper including a ram, a rotatable ram screw secured to and carried by said ram, means for rotating said ram screw, a ram. carrier, means for imparting a reciprocating motion to said carrier, of a pair of ram screw nuts threadably engaging said ram screw, a of upstanding spaced abutments secured to and carried by said ram carrier and including a passageway through which the ram screw may slidably extend, said ram screw nuts located between said abutments, means interconnecting said nuts for rotating them in opposite directions into abutting relationship with said abutments, cooperating means on said ram carrier and said nuts for limiting the amount by which said nuts may be rotated relative to said carrier, said nuts adapted to translate rotary motion of the ram screw to a linear motion of the ram carrier relative to said screw for effecting longitudinal movement of the ram relative to the ram carrier, and to automatically lock the ram screw relative to the ram carrier after each rotation of said screw and to impart the reciprocating motion of the ram. carrier to the ram. |
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