Scale printing instrument

A scale printing instrument which comprises:

• an elongated hand grip having a pair of straight, elongated, parallel, laterally spaced-apart legs extending longitudinally from one end of said hand grip, said legs defining a recess therebetween which is open at the end thereof remote from said hand grip;
• a wheel, said wheel being a planar disc having a multiplicity of uniformly circumferentially spaced-apart, radially outwardly projecting teeth on the entirety of the periphery thereof, said wheel being disposed in said recess so that its plane is parallel with said legs and the periphery of said wheel extending outwardly of the sides and said end of said legs so that the periphery of said wheel is uncovered and exposed except where said legs are joined to said hand grip;
• an axle extending between said legs and passing through a central opening in said wheel so that said wheel is supported on said axle for free rotation with respect to said hand grip and said legs;
• an elongated, straight arm extending longitudinally along one side of said hand grip and thence extending longitudinally alongside of and parallel with one of said legs and thence extending beyond said end of said one leg and beyond the periphery of said wheel, means supporting said arm on said hand grip for slidable movement in a direction lengthwise of said hand grip and said legs and means for releasably securing said arm to said hand grip to hold said arm in an adjusted position;
• and a circular brush mounted on said arm adjacent to the end thereof remote from said hand grip, said brush projecting laterally from said arm to a location adjacent the periphery of said wheel for contact with the apexes of said teeth as said wheel rotates with respect to said hand grip to deposit marking material thereon, said brush being mounted for rotation on said arm about an axis of rotation parallel with the axis of rotation of said wheel.