Technical supply co., Scranton. [from old catalog] · Scranton, Pa., Technical supply co · leaf 213
2210 2210. Drawing Board, pine wood, with hardwood ledges, bolted into theboard to allow contraction and expansion, and grooves sunk inone-fourth the thickness of the board, thus allowing the narroww^ooden strips to be still more effectually controlled by the hardwoodledges. Size, in Inches, 31/42… … 2212 2212. Drawing Board, similar to 2210, but of extra fine quality, with screwspassing through the ledges in oblong slots with metal bushings,which allow the screws to move when drawn by the contraction ofthe board. To make working edge perfectly smooth, a strip ofhardwood is let into edge of…
Engineering instruments · Drawing instruments
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
