Patent GB-189907667-A (GB)
Title: Improvements in Syphonic Apparatus and Apparatus connected therewith.
Inventor: ADAMS SAMUEL HENRY
Filed: 1899-04-12
Granted: 1900-02-03
Abstract: 7667. Adams, S. H. April 12. Filters, supplying and discharging liquid in.-Relates to siphon and other apparatus for regulating the supply and discharge of filter beds &c. In the apparatus shown in Fig. 1, an air dome C is connected by a pipe L to a rectangular siphon B with a deep trap, and is so arranged in a receptacle A that, when the liquid level in the receptacle rises above the level allowed for free discharge through the trap B, air from the dome C displaces the liquid level in the trap below an edge b, and further discharge through the trap is prevented. the liquid level in the receptacle then rising until it reaches a discharge channel such as D. In a modification of the apparatus of Fig. 1, a round pipe siphon is used with an air dome placed in the tank supplied by the trap. In the apparatus shown in Fig. 2, the air dome C is placed in a receptacle F supplied from the trap B, and the end of the pipe L is sealed by the liquid in the trap. Displaced air from the dome depresses the liquid in the trap below the edge b, and, as long as this air remains pent up in the trap, the supply of liquid to the tank F is stopped. This air is released by opening a tap N, or by emptying another tank R containing an air dome 0 connected by a pipe P to the trap B. In the form shown in Fig. 4, the exit of the trap B is bent round to form a part b<1>, in which air becomes enclosed and finally depresses the liquid level in the trap so that the supply is stopped. In the form shown in Fig. 5, the air pipe L is connected to an air cylinder &c. G in the tank or filter bed F. Liquid from the tank &c. F enters the cylinder G through a trap G', and drives out air through a pipe g, water seal g', and vent pipe g<2>. A pipe J within the receptacle G is provided with an air pipe j<1>, water seal j<2>, vent pipe j<3>, and a second air pipe j connected by a W-shaped pipe K to the siphon apparatus B. A ball float Q<2> in the receptacle G operates an arm Q<1> of a cock Q in the pipe j. When the cock Q is closed, air from the vessel J escapes through the pipe j<1>. When the receptacle G has filled above the end of the pipe g, air is displaced through the pipe L until the supply from the trap B is stopped. The pipe L dips into the liquid in the trap, and to unlock the trap the tank F is emptied, an air pipe Z is opened, and the float Q<2> then releases the cock Q, and liquid is sucked up into an enlargement k on the pipe K, so reducing the liquid level in the central pipe K<1> of the W-pipe that the air confined in the trap B escapes. The pipe J may be used apart from the receptacle G. In Fig. 6 is shown a discharge siphon for the tank F, comprising a deep trap S, a central pipe S', a dome S<2>, an air pipe S<3> with a cock S' actuated by a ball float S<5>, and an outer dome 8<6> with a vent tap S<7>. The rise of the liquid in the tank causes the float S<5> to open the cock S<4> and start the siphon. The air supply in the dome S<6>, and consequently the position of the float, is adjusted by the tap S<7>. In another modification, two apparatuses Band two receiving-tanks F are arranged so that each apparatus B is stopped by an air dome in its own receiving-tank, and started by an air dome in the other receiving-tank. To discharge the receptacle, an arrangement is described in which an air dome in one tank forces out the liquid from a W-tube, and so allows exit of air from a siphon and starts its action.