Patent ID: 6588864
Filing Date: 2003-07-08
Classification: B60H,F24F,G05G,Y10T

Abstract:
Tamper-proof apparatus for adjusting the range of settings of a controllable component that includes:a first panel; a control shaft coupled to the controllable component, a distal end of said control shaft passing through an opening in the first panel; a control knob mounted upon the distal end of said shaft for rotation therewith, said knob having a radially extended arm mounted upon a lower section of said knob adjacent to said first panel so that said arm moves over an arcuate path of travel as the knob is rotated; a second panel mounted over said first panel to provide a space between the panels, said second panel having an opening for rotatably containing a body section of said knob, said opening being of a size to prevent the arm from passing through said opening whereby said arm is captured between said panels; a series of holes contained in said first panel, said holes spaced apart along the arcuate path of travel described by said arm; a stop member removably mounted in a selective one of said holes wherein the stop member extends into the space between said panels to intercept the arm as the arm is rotated along said path of travel to limit the range of rotation of said shaft, and wherein the stop member is removable from the selective one of said holes only when said second panel is unmounted from said first panel.