Patent GB-782872-A (GB)
Title: An improved method and apparatus for deodorising the atmosphere
Inventor: OSBORNE EDWARD HENRY
IPC: E03D9/04
Filed: 1955-08-10
Abstract: 782,872. Disinfecting and deodorizing methods and apparatus. CALMIC, Ltd. July 23, 1956 [Aug. 10, 1955; Nov. 16, 1955], Nos. 23004/55 and 32738/55. Class 81 (1). In a method of deodorizing or disinfecting the atmosphere in the vicinity of a deodorizing or disinfecting medium or agent, liquid is allowed to rise and fall from time to time in a container to force charges of air therefrom, and the air thus displaced is conveyed to a second container and allowed to escape therefrom through or past a volatile deodorizing or disinfecting medium. A deodorizing apparatus suitable for carrying out the process as shown in Figs. 1 and 2 (23004/55), comprises a container 10 fixed to a flushing cistern 12 such that after each flushing operation some of the water supplied to the cistern enters the bottom of the container 10 and rises therein to the normal level of the water in the cistern and the volume of air it displaces is forced through an air tube 14 connected at one end to a union 16 secured in the base of a second container 17 and through an upstanding air tube 18 extending from the union 18 and terminating directly behind a block, pad or wad 19 which may itself be of a volatile disinfectant or deodorant or made of a fibrous material impregnated with a volatile disinfectant or deodorant and which is replaceably contained in a cylindrical sleeve 20 detachably connected within the circular flange 21a of a cylindrical cap 21 by means of a bayonet-connection 22, the cap 21 closing a corresponding opening in the sloping upper end wall of the container 17 and being provided with a series of interrupted peripheral slots which provide lateral openings 21b. In a modification (Fig. 3 (23004/55), not shown), the container stands on the bottom of the cistern. In another embodiment shown in Fig. 2 (32738/55), the container 10 is closed on all sides and at the top and bottom except for an aperture 10a in the top wall from which an air tube 13 extends and an aperture 10b in a side wall near the top end thereof through which a siphon tube 15 consisting of an inverted U-tube of appropriate bore is secured in the desired position by a joint 16, the shorter leg 15a of the siphon tube extending down the interior of the container 10 to its bottom end terminating slightly above the floor of the container, whilst the longer leg 15b extends alongside the exterior of the container with its bottom end terminating somewhat below the floor of the container. The air tube 13 leads to a chamber housing the disinfectant &c. as described above. In a modification (Fig. 3 (32738/55), not shown), the siphon tube is wholly contained in the container except for the end of the longer leg which necessarily extends through a hole in the floor of the container, and is soldered or brazed thereto. Instead of providing a deodorizing or disinfecting medium in block, pad or wad form, air displaced through the conduit leading from the cistern container 10 may be caused to bubble through a liquid containing a volatile deodorizing or disinfecting medium or agent in which case, the end of the conduit 14 may be coupled to a suitable union, fitted to the lower end of a receptacle containing a charge of the liquid deodorant or disinfectant and having at least one outlet opening at the top or upper level, a non-return valve being embodied in the union to permit air forced through conduit 14 to bubble through the deodorizing or disinfecting liquid to pass finally through the outlet opening into the atmosphere and to prevent the deodorizing or disinfecting liquid from siphoning back through the conduit 14. An alternative form of second container is shown in Fig. 1 (Comp.), in which the sloping upper end of the container 17 has a central opening which is completely closed by the base 26 of a receptacle 26, 26a which receives the removable pad or wad 19 as previously described and a slotted domeshaped cap or grille 27 on top of the cylindrical wall 26a which may be preforated at 26b. The air tube 18, which communicates with the tube 14 as in the previous embodiments, is extended upwardly through a hole in the base 26, the upper end being disposed directly behind a non-slotted portion of the cap 27 so that a charge of air issuing from the tube 18 will impinge thereon and be dispersed, some of the air being deflected back to flow over and past the upper surface of the pad or wad 19 and then out of the grille 27.