. Optical projection : a treatise on the use of the lantern in exhibition and scientific demonstration. Fig. 50.—Beards Large Regulator Compressed gases 87 The first was invented by Mr. E. Beard, and is shown insection in fig. 50. It screws on to the cylinder at d, from whichthe small orifice is closed at d by the valve /. The gas liftsthis valve and enters the bellows a a, which rise with thepressure, but are weighted above to the pressure desired. Thetop of the bellows has a collar c1 screwed with a very longpitch, in which the screwed pillar f turns easily as the bellowsrises. Below the lon
. Optical projection : a treatise on the use of the lantern in exhibition and scientific demonstration. Fig. 50.—Beards Large Regulator Compressed gases 87 The first was invented by Mr. E. Beard, and is shown insection in fig. 50. It screws on to the cylinder at d, from whichthe small orifice is closed at d by the valve /. The gas liftsthis valve and enters the bellows a a, which rise with thepressure, but are weighted above to the pressure desired. Thetop of the bellows has a collar c1 screwed with a very longpitch, in which the screwed pillar f turns easily as the bellowsrises. Below the long-pitch screw f which is merely to turnthe pillar easily, is a slow-motion screw /, the turning ofwhich in its corresponding collar forces the valve down intoits seat and stops the supply: thus at a given pressure the.
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Keywords: ., bookauthorwrightle, bookcentury1900, bookdecade1900, bookyear1906
