Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . Piston- Valve, cylinder by which the steam reaches the Talvc-clianiber c. Tlicvalves are on a single rod, and//are the eduction pas,sagf8 In Fig. 3767, the two piston-valves aie on the stem of thepiston, and govern the induction and eduction ports, through IiL. Piston-Rod and Sluffing-Box. Steam-Engine and Pison- Valve. PIT. 1719 PITCHES. which steam is a
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . Piston- Valve, cylinder by which the steam reaches the Talvc-clianiber c. Tlicvalves are on a single rod, and//are the eduction pas,sagf8 In Fig. 3767, the two piston-valves aie on the stem of thepiston, and govern the induction and eduction ports, through IiL. Piston-Rod and Sluffing-Box. Steam-Engine and Pison- Valve. PIT. 1719 PITCHES. which steam is admitted to be conducted from the respectivecylinders. Pit. 1. Tlie shaft of a mine. a. PuiHpiiig-pit; a shaft in which the pumps andliyJraiilic machinery work. 6. Iforking-pit; a shaft in which the mineral ishoisted and the supplies and workmen lowered. c. Emjitic-pit; the sliaft in which the engineworks. 2. (Founding.) A cavity or hollow scooped in thelioor to receive cast-metal. 3. A vat in tanning, bleaching, dyeing, or inwashing aUun earth, etc. 4. A sunken place in whicli charcoal is piled forburnint;. Pitch. 1. {Machinery.) a. The distance be-tween the threads of a screw measured on a lineparallel to the axis. Tlie depth is tlie railial b. The distance between the centers of two adja-cent teeth in a cog-wheel, measured on tlie pitch-line, which is concentric with tlie of revolutionand at such a distance Irom the base of the teeth asto have an eiiual rate of motion
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