US Patent: 2,295,130
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| Metal Shaper
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Patentees:
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| John H. Scheiber (exact or similar names) - St. Louis, MO |
| Francis H. Dean (exact or similar names) - Normandy, MO |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 14, 1941 |
| Granted: |
Sep. 08, 1942 |
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Joel Havens
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Description: |
| John D. Rippey - patent attorney
This invention relates to metal shapers; and has general reference to machine tools functioning as metal shaping machines. In the chosen embodiment of the invention shown in the drawings, the machine embodies means for varying the stroke length and the number of strokes per minute to suit the size and type of work to be machined. In some instances, it may be desired to machine short pieces, which may be cut at a high rate of speed; and in other instances, it may be desired to machine long pieces requiring a low cutting speed. The selection of the combination of stroke length and stroke cycles to obtain the required cutting speed is usually dependent upon the selective discretion of the operator. This may be undesirable because an error in making the selection, by combining the maximum stroke length and maximum number of stroke cycles per minute, will cause excessive acceleration and deceleration forces to be set up in the mechanism, with consequent serious impairment of the life of the machine, sometimes resulting in complete failure. Objects of the invention are to limit the frequency of reciprocating cycles obtainable in metal working machines to a predetermined maximum, dependent upon the selection of the desired stroke length, thereby confining the reciprocating stresses in the mechanism within safe limits; to limit the cutting tool speed to an allowable maximum consistent with longer tool life; and to provide means for overcoming or preventing error by the operator in making a selective combination of stroke length and stroke cycles.
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