US Patent: 2,899,870
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| Metal Planing or Shaping Machine
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Patentee:
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| Ludwig Gack (exact or similar names) - Muhlacker, Germany |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 16, 1954 |
| Granted: |
Aug. 18, 1959 |
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Joel Havens
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Description: |
| Michael J. Striker - patent attorney
The present invention relates to a metal planing or shaping machine in which the reciprocating driving motion is produced by means of an adjustable crank and a rocker arm, and by means of which, it is possible first to carry out a straight cut during the forward stroke of the machine, and then to swivel the tool holder thereof so as to cut a groove or fillet during the first part of the return stroke. Since in planers or shapers of this type, which were known prior to this invention, every adjustment of the stroke length of the tool slide also required a new adjustment of the groove cutting mechanism, it is the principal object of the present invention to provide a machine which obviates such necessity for a separate adjustment of the groove cutting mechanism. According to the present invention, the customary crank-pin for reciprocating the tool slide is associated with a second crankpin which is adjustable simultaneously and together with the first crankpin and within the same radial guide way of a gate-type disk. Through an intermediate connecting rod, such second crankpin is designed to move a cam plate in such a manner that, at any desired stroke length of the tool slide and within a portion of the return stroke of the tool slide which is always of the same length, the cam plate will always turn about an angle of .the same size, the sector of which extends into a cam portion which acts upon an element which turns the tool holder, so that separate adjustments of the groove cutting mechanism will no longer be necessary.
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