| 摘要 |
PCT No. PCT/CH81/00130 Sec. 371 Date Aug. 16, 1982 Sec. 102(e) Date Aug. 16, 1982 PCT Filed Nov. 20, 1981 PCT Pub. No. WO82/02101 PCT Pub. Date Jun. 24, 1982.The supply conduits (1, 2) for two different gases to be mixted are each associated to a pressure regulator (3, 4) and lead into two chambers (5, 6) connected by chokes (7, 8) having a variable section area to a mixing chamber (9). A control member (13) allows the cross section area of the chokes (7, 8) to be varied without modifying the ratio between those cross section areas. Another control member (14) allows the ratio between those cross section areas to be varied without modifying the sum. This device allows a mixture of gases of any molecular weight in predetermined proportions.
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