Collection of drawings of a vertical reciprocating gas compressor

Comprises drawings of a vertical reciprocating gas compressor (3 crank, 2 stage), capable of compressing 1000 c.ft. of free mixed gases per minute to a pressure of 150 atmospheres, speed 200 rpm, c.1918. Also includes a copy sectional arrangement drawing of same showing 'new cylinders etc on existing understructure'; dated 1933.

The compressor was used in ICI pilot ammonia plant from 1923 and converted in 1932-33 for "Drikold" (dry ice) manufacture.