Catalogue and price list of Mackey print paoer co. (1897)
Mackey print paper co., Pittsburg, Pa. [from old catalog] · [Pittsburgh?] · leaf 237
IMPROVED CLAMP AXD TAXGEXT ATTACHED TO THEF. C KNIGHT TRANSITS. … This Clamp is the invention of Mr. Knight and is the result of long andcareful study and much experimenting on his part. In it he has accom-plished the desired end—A Perfect Clamp. This Clamp is attached to and clamps on the large flange of the center; ithas the largest clamping surface of any…
Drawing instruments
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