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 . Gas-Re^tlator. A decrease of press- Fig- 218G. ure has a contraryellect, increasing theopening. The press-ure of gas is beneathboth the valve and thecup, but the latterbeing the larger over-comes the smaller anddrives its edge into thequicksilver. The larger view,Fig. 2186, has also auinverted cylinderwhich is partiallycounterpoised by aweight. As the press-ure
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 . Gas-Re^tlator. A decrease of press- Fig- 218G. ure has a contraryellect, increasing theopening. The press-ure of gas is beneathboth the valve and thecup, but the latterbeing the larger over-comes the smaller anddrives its edge into thequicksilver. The larger view,Fig. 2186, has also auinverted cylinderwhich is partiallycounterpoised by aweight. As the press-ure of gas at the inletincrea,ses, the cylinderlises and carries withit the cone, which con-tracts the area of thegas opening in theplate on the summit ofthe central inlet-pipe; the pipe on the left is the exit. Fig. 2187 shows a rubber diaphragm in a chamberwherein the jiressure of gas ^g 2187. raises the wirei^and with it thelever C on whichis the the extentof pressure in Sdetermines theposition of thevalve relativelyto its seat, andthis graduatesthe area of open-ing to the press-ure. chamber inwhich carbona-ceous matter isdistilled to pro-duce illuminat-ing gas. Dr. Claytondistilled illunii-niiting gas
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