Technical drawing and lettering draughting appliance - transfers lines with continuous reduction in size of scanned shapes

摘要

The drawing and lettering copying appliance has a basic frame of four sections (1-4), transverse guides (6, 15) and a U-shaped shoe (5), fastened to a guide (6), which in turn is guided in a groove (9') of a side section (9). A second U-shaped shoe (7) is retained on the guide via spheres, sliding in a groove. A scanning plate (8) fastened on the second guide shoe, can carry out a longitudinal and a transverse movement. An angle (10) fastened on one frame section (3) carries a rectangular plate (10') with a longitudinal groove on its lower surface. A carriage moves on the second transverse guide (15). The carriage consists of a U-shaped guide shoe (17) with projections at both ends, connected by a tube (19) parallel to the shoe. A pen holder (38) is displaceably fastened to the tube.