Percentage timer
AssigneeDeltrol Corp.
InventorJoseph J. Mahon
Life of this patent
Estimating the term…
Abstract
A continuous repeat cycle timer in which the on period is externally adjustable. The beginning of the on period is fixed, being started by a cam follower dropping into a notch in the periphery of a cam. The end of the on period is determined by axial movement of a second cam which releases a latch. The point of axial latch releasing movement is set by an adjusting cam which is rotatable by an external knob. The cam shaft for the operating cams extends through the knob and indicates the progress of the time cycle.
Claims10
In a timing device, the combination of, first cam means mounted for rotation, drive means for rotating said cam means about an axis, said cam means having a peripheral surface formed with a peripheral notch, second cam means mounted about an axis for compound rotary and axial movement, means for rotating said second cam means in a predetermined relationship with said first cam means, said second cam means having a side camming surface, a relatively stationary camming surface cooperating with said side camming surface to cause axial movement of the second cam means as it rotates, a control device, a cam follower biased toward the peripheral surface of said first cam means and riding same, said cam follower being arranged to actuate said control device from a first position to a second position when the cam follower drops into said peripheral notch, latch means arranged to hold the control device in said second position, and means actuated by axial movement of the second cam means for releasing said latch means at a predetermined angular position of the second cam means.
Dependencies are inferred from the claim text.