Within the pages of “The Essentials of Lettering” by Thomas E. French and Robert Meiklejohn (circa 1912) is an example for creating a sans serif alphabet and numerals.
The lesson plate is entitled “Upright Single-Stroke Gothic”; a basic monoline font most useful for architectural and drafting plans because of its easy-to-read properties.
This type design is now available as Drafting Class JNL, in both regular and oblique versions.