Automatic siphonic apparatus as used in sewerage systems and in sewage purification plants . *The water in the tank has previously risen to a height above thelower bed of the siphon leg equal in amoimt to the depth of waterin the tilting pan and thus the two coliams of water were keptin equilibrium. The sudden opilling of water from the tiltingpan destroys tJiis equilibrium and causes the long leg of thesiphon to become filled wit-h water under a slight head. Thisbrings the siphon into full operation and it continues to di8«charge tan til the water is drawn from the tank down to thebottom of t
Automatic siphonic apparatus as used in sewerage systems and in sewage purification plants . *The water in the tank has previously risen to a height above thelower bed of the siphon leg equal in amoimt to the depth of waterin the tilting pan and thus the two coliams of water were keptin equilibrium. The sudden opilling of water from the tiltingpan destroys tJiis equilibrium and causes the long leg of thesiphon to become filled wit-h water under a slight head. Thisbrings the siphon into full operation and it continues to di8«charge tan til the water is drawn from the tank down to thebottom of the short leg of the sijjhon. When it reaches thispoint air is admitted and the action ceases. The pressure beingremoved the tilting pan returns to its horizontal position andthe operation is repeated at the next rise of water in the form of siphon was found to work well for a certain periodof time; but it was discovered that even though the tilting panwere constructed of cast iron it would sooner or later rust upand the siphon would be rendered useless. VAK VRANKIIP«f THE RHOADS WILLIAM SIPHON. The Rhoads-Wi3liam is the oldeet and perhaps the beet ofwhat is knowi as the double trap siphons. As finally perfectedand as it is still made, the Rhoads William siphon consists ofbut two castings, the bell and the main trap. Between the twolegs of the main trap is cast an auxiliary blow off trap havinga depth of seal two or three inches less than that of the maintrap. See Plate III. The operation is simple. The rise of water in the tankcompresses the air in the bell and so forces the water in bothtraps down. This continues until the water level stands at thelevel of the bend A in the auxiliary blow off traps. Any addi-tional pressure forces some of the air around this bend and outinto the sewer. At the same time the water is forced out of theblow off trap thus quickly releasing all the air confined in thebell} this destroys the equilibrium and brings the siphon into
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectsewerage, bookyear190
