An improved steriliser / [Wolf Defries].

  • Defries, Wolf.
Date:
1901
Catalogue details

Licence: Public Domain Mark

Credit: An improved steriliser / [Wolf Defries]. Source: Wellcome Collection.

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    o 15 25 30 35 Defrits and Feeny's Improved Steriliser. tiibution of the liquid, but also insures the continued freedom of the joint of the cap on the tube and its efficiency as a safety valve. 1 he chamber may be fitted with any suitable racks H for carrying utensils I ' v< . 1° llsed in routine sterilisation, and may be provided with a loose cover T\. ;> 1 lie \ essel may be heated by gas, coal, or other suitable means. A connection may be provided on the chamber for the supply of water or disinfectant solution. 1 1h‘ best method which we at present know of operating this apparatus is as follows: — Both valves F and (f are closed and water or disinfectant solution is let or 1 pouied into the chamber B until it rises in the gauge glass b to a fixed point below the level of the perforations in the open communicating tube C. The ^alve b on the second communicating pipe K is then opened and the liquid falls into the vessel A. lhe valve is then closed and the liquid heated. Steam formed on the upper surface of the liquid will force it up through the open pipe C whence it will be projected from the arms c of the cap on to the objects I in the chamber B. A\ hen the steam pressure has risen sufficiently to overcome the weight of the cap 1), the cap will be lifted, and the liquid will escape from the perforations in the pipe C which will be uncovered by the rising of the cap, the proportions of the respective outlets being preferably designed so that 20 the apparatus delivers normally through the arms and the cap is lifted only when the desired maximum in the working pressure is exceeded. If the cap is made solid without arms the liquid will not escape until the cap is lifted, but if desired smaller holes may be provided below the cap, through which the disin¬ fectant will normally escape until the desired pressure is reached. After sufficient of the liquid has been lifted into the chamber to uncover the lower end of the communication tube C, steam will follow, and condensing in the chamber or escaping through its lid, will allow the pressure in the vessel A to fall. T\ hen it has fallen sufficiently, as indicated on the pressure-gauge, the valve F on the connecting tube is opened, and the liquid falls again into the vessel, carry¬ ing with it any solid matter which may have been put into the chamber, and then rises into the upper part of the vessel freed from such lumps as mav be too large to pass through the perforated diaphragm a. The level of the liquid is filled up from time to time according to the indications on the water-gauge, and the vessel is washed out through the draw-off valve G, so that the process of filling and washing out may proceed continuously without letting down the fire. AVe may alternatively piovide two or more chambers fed from the same vessel, as for example for the purposes of slop sinks, and a deodorant may be added to the disinfectant if it has in itself no deodorising capacity. -JO Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is: — » 1. The improved steriliser, combined, constructed and arranged for the purposes and as described and illustrated. 45 2. In a steriliser operating by means of a hot liquid under low pressure intro¬ duced from a heating vessel into a disinfecting chamber, a communicating tube furnished with discharge orifices for the liquid surmounted by other orifices covered by a sliding cap for the purposes and substantially as described. 3. In a steriliser operating by means of hot liquid under low pressure intro- 50 duced from a heating vessel into a disinfecting chamber, a communicating tube with one or more orifices normally covered by a hollow cap fitting over the com¬ municating tube and furnished with discharge orifices, for the purposes and sub¬ stantially as described. 4. In a steriliser operating by means of hot liquid under low-pressure introduced 55 from a heating vessel into a disinfecting chamber, a hollow cap fitting over a