Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances (1918)
Keene, E. S. (Edward Spencer), b. 1864 · New York, McGraw-Hill book company, inc.; · leaf 34
® ^ . face removed. the flat elastic tube A, which is bent in the form of a circle. When the pressure of the steam enters atS the air in the tube is compressed and the tube tends to straighten.The movement of the tube caused by the steam pressure is com-municated to the pointer by a link connection… … 24 MECHANICS OF THE HOUSEHOLD released, the tube returns to its original position and the spiralspring C turns the hand back to its first position. The Safety Valve.—All steam boilers should be providedwith safety valves as a safeguard against excessive steam pres-sures. Of the various types of…
Heating · Lighting · Plumbing
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