Patent GB-475360-A (GB)
Title: Improvements in and relating to sterilisation and disinfection apparatus
IPC: A61L2/04
Filed: 1936-05-15
Abstract: 475,360. Sterilizing-apparatus; heating water by electricity. LAUTENSCHLAGER, F. May 15, 1936, Nos. 13834, 13835, 13836, 13837, and 13838. Convention dates, May 24, 1935, June 7, 1935, July 5, 1935, Aug. 28, 1935, and Oct. 10, 1935. [Class 81 (i)] [Also in Groups XI and XIII] Sterilization apparatus for medical purposes having a water-filled heating vessel arranged under and connected with the water container is characterized in that the heating vessel is constructed as a pipe having such a large diameter that a plurality of electrical heating elements can be inserted therein from one or both ends and that the pipe is longer than the diameter or width of the water container connected to it. In Fig. 1, a container 1 for bandaging material &c. is disposed in a jacketed water container 2 connected by pipe 5 to a heating pipe 6. Heating units 7 are shown, the terminals 8 being covered by cap 9. A gauge glass 10 is provided. In a similar construction, connecting pipes 5 are provided at each end of the heating pipe, which is surrounded by a steam heating jacket. In another modification, gas burners are disposed under the pipe 6 containing the electrical heating elements and under the container 2. In an instrument sterilizer, Fig. 3, heating elements 7, 11 are inserted from both ends of the pipe 6, and safety fuses 13, e.g. of tin, are provided at the connecting branches .14, 15 between the container 12 and pipe 6. Openings 16 in the jacket 17 allow the pipe 6 to fall if the fuses melt. In a modification, flanges on the connecting branches are joined by soft solder. Fig. 4 shows an instrument sterilizer wherein the steam jacketed heating pipe 6 is connected to the water container 12 by three pipes 23, 24, the latter being in the form of a dip pipe. A solution sterilizer, Fig. 8, comprises inner and outer vessels 29, 30, the water in the jacket being heated by a coil 31 connected by pipes 33, 34 to the heating pipe 6, provided with an auxiliary steam heating jacket. The pipe 6 is connected by pipe 37 to mains water for cooling purposes, a valve 39 being disposed in pipe 34 and adapted to be closed by the pressure of the water, so that the cooling water may through the whole coil, escaping through pipe 35. During the sterilizing operation, valves 36, 38 are closed. In a modification, the water space in the sterilizing jacket is in direct connection with the heating pipe and a separate coil for cooling water is provided. A jacket formed around the heating pipe serves for preheating distilled water which is added to a concentrated solution during sterilization thereof. In another construction, the inner container, for the reception of drums of bandaging material, does not extend to the top of the outer chamber, and is formed with a beaded-over edge upon which are placed dishes for the reception of instruments. The inner container is connected to an air filter for displaced air. The Specification as open to inspection under Sect. 91 comprises also the following subjectmatter : the heating pipe may be heated by steam or by gas. Thus, in Fig. 10 (Cancelled), the electric heating elements are replaced by an internal steam heating pipe 27. The heating coil 31 shown in Fig. 8 is moreover replaced by a water-jacket 40. In another construction, distilled water to be added to a concentrated solution in the sterilizer is preheated by passage through a coil in the heating pipe. Heating up is effected by a steam jacket surrounding the heating pipe, a single electric heating element being provided for maintaining the temperature. This subject-matter does not appear in the Specification as accepted.