Nibbling machine control device

Claim 2

A nibbling machine including an eccentric shaft rotatably mounted in the machine, a cutting tool operatively secured to said shaft, and feed means for positioning a workpiece in relation to said cutting tool, wherein the movement comprises an electrical circuit operatively connected to said feed means, a switch located in said circuit for starting and stopping said feed means, switch closing and opening means is secured to said shaft and extends outwardly therefrom and is rotatable therewith, said switch closing and opening means arranged in operative communication with a said switch, said switch is located in the path of travel of said switch closing and opening means as it rotates with said shaft so that in each rotational cycle of said shaft said switch is first closed by said switch closing and opening means as it moves along its path of travel for actuating said feed means and then said switch closing and opening means opens said switch for stopping said feed means.

Claim 3

A nibbling machine as set forth in claim 1, wherein said switch closing and opening means are adjustable for varying the period during the rotational cycle of said shaft during which said switch means are closed.

Claim 4

A nibbling machine, as set forth in claim l, wherein said switch closing and opening means comprises a sector-shaped member mounted on said shaft and extending radially outwardly therefrom for effecting the closing and opening of said switch, said sector-shaped member comprises at least a pair of sector-shaped plates each mounted on said shaft and at least one of said plates movably positionable about said shaft relative to the other for varying the angular extent of said sector member in closing and opening relationship with said switch, means for locking said plates together comprising a similarly shaped curved slot formed in each of said plates, said slots arranged to extend in the direction of rotation of said shaft and disposed in curved alignment, and a locking member arranged to extent through said slots for fastening said sector-shaped plates together in the desire angular relationship, and said switch means comprises a magnetic switch with said sector-shaped member arranged to pass in noncontacting relationship with said magnetic switch whereby said magnetic switch is maintained in the closed position during the passage of said sector-shaped member in operative and noncontacting relationship with said switch means.

Claim 5

A nibbling machine, as set forth in claim 1, wherein said switch comprises a support member positioned in the nibbling machine spaced radially outwardly and extending about at least a portion of the circumferential periphery of said shaft, an adjustably positionable circuit closing element and an adjustably positionable breaking element mounted on said support member in angularly spaced relationship relative to said shaft and spaced radially outwardly from said shaft, and said switch closing and opening means comprising a vane secured to said shaft and extending radially outwardly therefrom for actuating said circuit closing element and said circuit opening element as it is rotated past these elements by said shaft.