Patent ID: 6513200
Filing Date: 2003-02-04
Classification: G05G,Y10T

Abstract:
An operating knob used to adjust the setting of test and measuring equipment or machines and mounted with its axis of rotation perpendicular to a user's arm, comprising:an upper knob portion being polygonal in shape and defining a first recess in each of a plurality of side edges thereof, the first recesses of the upper knob portion being engageable with two to four fingers of the user, the upper knob portion having a first radius; a lower knob portion connected with and located below the upper knob portion and defining a plurality of second recesses in a side edge thereof, the second recesses of the lower knob portion being engageable with a thumb of the user, the lower knob portion having a second radius shorter than the first radius, the lower knob portion having a common axis of rotation and symmetry with the upper knob portion; and wherein the number of the second recesses of the lower knob portion is more than the number of the first recesses of the upper knob portion.