Modern moulding and pattern-making : a practical treatise upon pattern-shop and foundry work, embracing the moulding of pulleys, spur gears, worm gears, balance-wheels, stationary-engine and locomotive cylinders, globe valves, tool work, mining machinery, screw-propellers, pattern-shop machinery, and the latest improvements in English and American cupolas (1885)
Mullin, Joseph P · New York : D. Van Nostrand · leaf 116
the face c should be struck with a radius equal to the distance from the centre line of the cylinder to the face of the core ; and the inside of the cover P is struck with the same radius, plus the thick- ness of the core. The curve d must be an arc of a circle, struck with radii from the centre… … Fig. 100. the distance from the centre line of the cylinder to the face of the valve-seat ; the bottom is cut back the thick- ness of the metal required between the port and exhaust cores, as shown at Fig. 99. For the better under- standing of this, it will be well to refer to Fig. 102, where the…
Founding · Patternmaking
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
