Hand graphic symbol marking device

Claim 1

A graphic symbol marking device for marking on a linear coordinate surface member comprising: a. a base member having a bottom surface adapted to be placed on the surface to be marked; b. a stamping head supporting structure comprising a rigid member mounted on the upper surface of a first portion of said base member, and a substantially flat spring arm secured at one end to said rigid member and overlying and spaced from said upper surface. c. a stamping head secured to said spring arm at a point removed from said end and being provided with a symbol stamping die on its lower side; d. said spring arm having substantially only one degree of flexibility in a direction at right angles to said bottom surface of said base member and being adapted to be moved manually in said direction whereby said die is also adapted to be moved in said direction; e. said base member being provided with an opening in a second portion of said base member, said opening being disposed in the path of travel of said die, whereby said die is adapted to be moved through said opening to substantially the plane of said bottom surface; f. said second portion of said base being transparent and provided on its bottom surface with two guide lines oriented so that if extended they would intersect substantially at the center of said die as it moves into said plane of said bottom surface of said base member.