Patent ID: 6188030
Filing Date: 2001-02-13
Classification: H01H,Y10T

Abstract:
A rotationally adjustable cam structure comprising:(a) a support structure;(b) an adjustment pinion affixed to said support structure for rotation, said adjustment pinion comprising a plurality of first teeth disposed on a pitch circle thereof, said first teeth being spaced with a given diametral pitch throughout a portion of the pitch circle of said pinion, at least two of said teeth having a smaller diametral pitch;(c) a rotatable hub affixed to support for rotation; and(d) a first cam affixed to said rotatable hub for rotation relative to said rotatable hub, said cam comprising a cam profile disposed on a first circumference of a surface thereof and a plurality of second teeth disposed on a second circumference of a surface thereof, said second teeth positioned to be enmeshed with the teeth of the adjustment pinion;whereby the adjustment pinion ceases to rotate when the teeth with the smaller diametral pitch of the adjustment pinion fail to engage the plurality of second teeth disposed on the cam.