| 摘要 |
A cam feed attachment and a quick space attachment for a code key and key card coded cutting machine enabling a fifty percent time saving in cutting code or master keys with much less effort and with as high a degree of precision. A thread advancing key moving shaft, collar and turn wheel assembly is replaced by a rotational shaft mounting a compound quick action cam manually rotated by a lever mounted on an adjustably position locked cap. The compound quick action cam key moving assembly quickly moves the key clamp vise from the retracted position where the key is clamped in the advanceable machine key vise to a shallow cam drive portion for manual key advancement for key notch cutting to specific card indicated key notch depth cuttings. The pivotally mounted advanceable machine key vise member is extended through a double range where one or the other of two cam sides of the shallow cam drive portion may be used with the manual rotational direction of control reversed one from the other. The cam feed is a constant rate cam that uses less than one sixth of a revolution in the key cutting cycle from the start of the most shallow cut to the full depth of the deepest cut. The machine is further altered by replacing a hand crank wheel key notch cut positioner with a belt and pulley structure requiring crank drive of only two and one half turns in place of ten turns.
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