Abstract The plural speed mechanical transmission system includes a driving shaft rotated at a first speed by a flywheel and a driven shaft coaxially lined with the driving shaft. Clutches having two energized states are disposed adjacent the ends of the shafts, with the clutches operable in a first state to connect ends of the shafts for rotation of the driven shaft at the first speed. An idler gear is disposed parallel to the driven shaft and is operable to transmit motion from the driving shaft to rotate the driven shaft at a second different speed when the clutches are in a second state. Structure is connected between the idler gear and one of the shafts for allowing selective variance of the magnitude of the second speed.
In a press brake system wherein sheet material is pressed, the combination comprising: a. transmission means connected to the press brake for providing different speeds to preselected portions of each press brake stroke, b. sensing means for sensing a physical characteristic of said sheet material, and c. means responsive to said sensing means for varying one of said speeds in dependence upon said physical characteristic.
Claim 2
Dependent Claim
65 words
In a press brake system wherein sheet material is pressed, the combination comprising: a. transmission means connected to the press brake for providing different speeds to preselected portions of each press brake stroke, b. sensing means for sensing a physical characteristic of said sheet material, and c. means responsive to said sensing means for varying one of said speeds in dependence upon said physical characteristic.
Claim 3
Dependent Claim
16 words
The system of claim 1 wherein said physical characteristic comprises the width of said sheet material.
Claim 4
Dependent Claim
23 words
The system of claim 2 wherein a generally constant speed of whipping of the ends of different widths of sheet material is provided.