Improvements in sterilizing apparatus / [Johann Franz Hugo Gronwald].

  • Gronwald, Johann Franz Hugo.
Date:
1891
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in sterilizing apparatus / [Johann Franz Hugo Gronwald]. Source: Wellcome Collection.

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    Nc 3902 A.D. 1891 Date of Application, 4th Mar,, 1891—Accepted, 23rd May, 1891 COMPLETE SPECIFICATION. Improvements in Sterilizing* Apparatus. We, Johann Franz Hugo Gronwald, Apothecary, of 33 Kaiserstrasse, C„ and Emil Heinrich Conrad Oeiilmann, Engineer, of 70 Dresdener Strasse, S., both of Berlin in the German Empire, do hereby declare the nature of this invention and in what manner the same is to be performed, to be particularly 5 described and ascertained in and bv the following statement:— J o Our improvements relate to that kind of sterilizing apparatus in which bottles or vessels contained in a closed vessel or pan are closed by means of a presser or closing piece inside the closed vessel or pan operated from the outside of the same, and consists in arrangements for bringing said presser or closing pieces into action 10 by means of liquid, steam or air, or other fluid pressure, produced or controlled by outside appliances. On the sheet of drawings appended hereunto two arrangements of apparatus are shown for carrying our invention into effect, Figure 1 showing the application of water or other liquid pressure, and 15 Figure 2 that of liquid steam or compressed air pressure. The tray carrying the bottles or other vessels may be moveable and the presser stationary, or the tray may be stationary and the presser moveable. The lower part of the heating vessel or pan A contains the bottle tray B, provided in the usual way with compartments a for the bottles C. The moveable part, 20 which as hereinbefore stated may be either the tray B or the presser D, is attached by a rod to a piston or plunger E, said rod passing through the bottom of the vessel A, when the tray is moveable (Fig. 1) or through the said bottom and the tray when the presser is moveable (Fig. 2). The piston or plunger moves in a cylinder E1, arranged underneath the chamber A and provided with inlet pipes for 25 the admission of the actuating fluid. The apparatus is worked in the following manner : The heating vessel A is filled with water which is made to boil by means of steam, or is directly heated by steam. The bottles C, filled for instance, with milk, are placed into the vessel A and their stoppers and locking wires placed loosely upon them, so that they can be closed by 30 the presser D. The upper part G of the vessel A is then placed upon the lower part. An air-tight joint is not necessary, as the steam generated inside the sterilizing apparatus will drive out the air contained in the same and effectually prevent the entry of fresh air into the vessel from the outside. When the sterilizing process has been completed, the pressing fluid is allowed to 35 act upon the piston or plunger. In the arrangement shown by Fig. 1 this is done by screwing down a piston h in the cylinder H by means of the hand wheel c, so that the water or other liquid contained in the cylinder H below the piston h is forced through the pipe F into the press cylinder El below the plunger E. rl he bottle tray B is thereby pushed up and the locking wire loops of the bottles are carried 40 against the presser J) and closed as the tray rises higher. The piston h is then screwed back or upwards and the tray B descends in consequence of its own weight and forces back the liquid into the cylinder H. Instead of the cylinder H and piston h a force pump of any ordinary construction may be used. In the arrangement of apparatus shewn by Fig. 2, steam, compressed air, water 45 or other liquid under pressure is used and the presser D moved by it in both directions, i.e. upwards and downwards. For this purpose the pipe supplying the pressure fluid is fitted with a four-way cock K to which a pipe f leading to the underside and another pipe J1 leading to the upper side of the piston E are connected, so that by changing the position of the four-way cock the fluid is 50 admitted to one or the other side of the piston and exhausted from the opposite [Price 6<L]