US1469214A - Formaldehyde fumigator - Google Patents

Description

W. DREYFUS FORMALDEHYDE FUMIGATOR Oct. 2 1923.

Filed May 6, .1922

% IN VEN TOR ATTORNEY Patent @ct teas.

is A ii a ix" hdtdild WILLIAM onerous, on new roan, 1v. .assrenor. T0 when nrsrnrno'rino cone PAIGE, 01 NEW' YORK,

r ooarealrron or new YORK.

Application filed May 6,

To all whom it may] concern 7 Be it known that 1, WILLIAM Dnnvnns, a citizen of the United States, residing New York city, county of h eufYorlt, State of New York, have invented. new andius'eful Improvements in Formaldehyde Fumigators, of which the following is a'spccification. f

My invention-is particularly adapted for vaporizing a body of disinfectant which is inflammable both as to its solid constituent and its vapor. A further object of the in ve'ntionis to provide a wickless burner for solid alcohol, the burner being so constructed hat the area of combustion may hedefinitely gulated. A further object of the invention is to provide a burner of the said type so designed that the flame will remain steady throughout the vaporizing"- operation.

By reference to the drawings it will be seen that the embodiment of the invention therein shown comprises stand A, a container B for the disinfectant, and a burner C.

The stand is formed of a complete sheet of metalrectangularly bent so as to provide the opposite closed sides a, the stand being open at the remaining two sides. The st nd strengthened by means'of the edges Z). At its upper surface the stand is provided with a circular opening); 0., and at the three points 'D. small rectangular sections are cut and bent upwardly so as to provide stops for the side wall of the disinfectant-container 13., so that the latter may readily be placed in its proper position upon the stand.

The burner C. consists of a relatively shallow cylinder formed in its upper surface with the central circular opening E. and with the air ducts F. on opposite sides of the opening.

The burner is particularly designed for vaporization of pa f aldehyde or mixtures thereof, and for such purpose the con tainer 13., stand A. and the burner C. are of fixed relative proportions in accordance with the cubic feet of room space to be disinfected. It is important that the vaporization of paraformaldehyde should proceed in suhstantial volume, and yet not so rapidly as to cause vapor ignition bv the flame. It is evident therefore that the flame must be controlled. For this reason it has not been considered feasible to employ sol1d alcohol as commonly used, that is to say, without a 1922. Serial no. 559,065.

wick. For example, should the container be of such restricted diameter as to enablea flame of the proper size, the burner would he so great in depth,.that as the fuel became consumed, the flame would recede from the disinfectant container to such an extent that no effective result could be obtained. On the other hand, if the diameter of the fuel container was made sufficiently great to negative the effect of the gradual lowering of the fuel surface by combustion, the flame would be so great that the over-rapid vaporization would cause ignition of the vapors and the disinfectant itself.

The burner shown and described herein renders it possiblerto employ a relatively shallow container for the solidified alcohol, and to burn the same with a restricted flame area so that the-exact time ratio of vaporization be gauged in advance and the body of solidified alcohol proportioned exactly in accordance with the quantityrof disinfectant to be vaporized.

It will be noted that the top of thezburner is formed with the air ducts F. N ow when the alcohol is 'ignitedthrough the flame opening E, air will he drawn into the, burner through the said air ducts by the expansion of the air within the burner and its passage through the central opening with the flame. The atmospheric pressure of air entering through ducts l acts as a continuous air cushion upon the surface of the alcohol, and drives the alcohol vapor through the way of least resistance, that is the central flame opening E, the practical result being that the area of combustion of the alcohol is confined to substantially the area of the flame opening. Inasmuch as the radiated heat so softens the solidified alcohol that it flows to maintain a constant level within the fuel container, it is evident that the limitation of the area of combustion will not affect the combustion of the entire quantity of fuel within the container. lhus the interior of the fuel container may bereduced to substantially the same as, or very slightly larger than, the block of solid alcohol which it encloses. Inasmuch as the fuel container may be made quite shallow, while'enclosing the, required quantity of fuel. the'rec'ession of the flame through gradual consumption of the fuel is so slight as to be negligible.

I have found it desirable to employ two air ducts only, and on substantially opposite sides of the central flame opening of the burner, and to form these air ducts of very small and the tendency is for the flame to be driven to the opposite side of the flame opening. It is also highly desirable that the a surface of the burner be smooth, so that the reflected heat from the metal container of disinfectant maybe readily diffused by the passage of air over the surface of the fuel can. In the absence of proper diffusion of this reflected heat, the alcohol will become over-heated and the flame will become too large. lhe proper distance between the upper surface of the burner and the lower wall of the container for the disinfectant, will depend upon the sizes of these units, for example, a burner containing 19; ounces of solidifledalcohol. will be sufficient to vaporize two ounces of formaldehyde, and it is desirable to have a distance of 1 inches between the disinfectant container and the top of the burner. The flame opening should be approximately inches.

It will be understood that various modiflcations may be made in the embodiment shown in the drawings, without departing from the spirit of my invention.

. What I claim, and desire to secure by Letters Patent being i 1. A wickless burner for solidified alco hol, consisting of a fuel container having an upper horizontal wall closed with the exception of a central flame opening of small area relative to the wall and two'opposed air openings each adjacent the flame opening and each of small area'relative to said flame opening, for maintaining a steady flame and preventing flickering thereof.

2. A wickless burner adapted to enclose a quantity of solidified alcohol of a definite combustion-surface area and having a Wall formed with a flame-opening of substantially less area than said combustion surface and means for limiting the area of combusopening, substantially as shown and described.

3. A wickless burner for a body of solidifled, alcohol comprising means for restricting the point of combustion to a predetermined restricted surface area of the alcohol,

said means comprising a horizontal wall enclosing the upper surface area of the body of alcohol except for a centrally disposed flame opening of small area relatively to said wall and opposed air openings each adjacent the flame opening and each of small area relative to said flame opening.

4. A wickless burner for a body of solidified alcohol comprising a container having an upper horizontal wall formed with a centrally disposed flame opening, and two air slots at opposite sides of said flame opening.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses. 7

' WILLIAM DREYFUS. Witnesses: 7

JOHN A. MURCUSE, LEAH FRIED.

tion to substantiallyt-he area of the flame

Images