Improvements in apparatus for generating and applying fumes, smoke or vapours for disinfecting, deodorizing or fumigating purposes, or for the testing of pipes or passages by what is known as the smoke test, or for analogous purposes / [John Watts].

  • Watts, John.
Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in apparatus for generating and applying fumes, smoke or vapours for disinfecting, deodorizing or fumigating purposes, or for the testing of pipes or passages by what is known as the smoke test, or for analogous purposes / [John Watts]. Source: Wellcome Collection.

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    Watts Apparatus for Generating and Applying Fumes for Disinfecting Purposes, <fc. and passes from the said chamber to meet the smoke, fumes, or vapours, passing from the combustion chamber and carry it, or them down, through a space to the outlet, to which a hose and nozzle, or other suitable device may be attached for leading the smoke, or the like, to the place where it is to be ejected the outlet being 5 provided with a valve which is closed when the apparatus is not in use. The combustion chamber, and air and smoke passages, which are arranged around it, are all covered in by a cover secured in any suitable way for example it may be secured by screws and nuts or for light pressures it may have a rim which enters a groove at the top of the outer casing so as to form a liquid seal for the said cover... 10 In order to explain more clearly the nature of my invention I will describe more particularly with reference to the vertical section shewn in the accompanying drawing an arrangement according thereto ; premising however, that I do not limit myself to the precise details which I have shewn. The apparatus consists of an outer casing A separated into compartments by a 15 diaphragm B the lower compartment C constituting a compressed air chamber, and the upper compartment containing the combustion chamber D in which is the smouldering material. This chamber D is supported upon a tray E which forms its bottom, the said tray having in it a conical orifice, or short pipe E2 which fits oyer a conical piece F2 at the upper end of a pipe F which passes through the 20 diaphragm B and opens into the compressed air chamber C the top of the last pipe F being closed except for a small opening, or openings / of such size as to pass enough air to supply the smouldering material in the combustion chamber D. The pipe F is secured to the diaphragm B by means of the nut f2 and plate or valve seating f3 above. The pipe F at the portion between the bottom of the 25 combustion chamber D and the top of the compressed air chamber C acts as a guide for a weighted ring-valve G which normally covers an opening /4 (or openings), in the diaphragm B and plate or valve seating f3 which, when the air in the compressed air chamber C reaches a sufficient pressure to raise the valve G affords or afford a passage for air which passes up outside the combustion chamber D 30 and then, meeting the smoke, or the like therefrom carries it down to the outlet a from the casing A to the hose A2 and thence to the place where the smoke, or the like, is to be used. To enable this to be done the outer casing A which encloses the space in which the combustion chamber is placed, is covered by a cover A3 which may be provided with a water seal joint A4 as before explained or the cover 35 may be secured in any other way for example by wing nuts and screws. A cylinder H extends from the diaphragm B which forms the top of the compressed air chamber C and this cylinder and the combustion chamber each leave a space between their tops and the cover. The distance between the sides of the combustion chamber D and the inside of the said cylinder H, and between 40 the outside of the said cylinder H and the inside of the casing A are sufficient to form passages for the passage of the air, and the air and smoke or the like to the outlet a which opens into the lower part of the space between the afore¬ said cylinder H and the outer casing A. The outlet a is provided with a valve a2 to be closed or to automatically close when the apparatus is not in use. 45 The air is supplied to the compressed air chamber by means of a fan, bellows, pump, or other air forcing device. I have shewrn a pump consisting of a barrel I situated at the side of and connected to the casing A of the apparatus the lower end of this barrel, above the outlet i therefrom to the air compression chamber C is perforated at i2 and provided with a disc valve i3 which, when the piston I2 of 50 the pump is making its stroke in one direction (its upstroke) closes the said perforations i2 to prevent air passing back from the compression chamber C but opens to allow air to pass from the pump when the piston I2 is making its com¬ pressing (downward) stroke. The piston may be of a cup leather shape as shewn and air may be admitted to beneath it by the said piston, on its up-stroke, passing 55 beyond air openings 24 in the barrel I but any other suitable construction of pump or air forcing device may be used. In using the apparatus the matter from which the fumes are to be generated is lighted and placed in the combustion chamber D