US2699969A

US2699969A - Variable atomizer

Info

Publication number: US2699969A
Application number: US275584A
Authority: US
Inventors: Stege Willem Cornelis Ter; Meindersma Elize
Original assignee: Hartford National Bank and Trust Co
Current assignee: Hartford National Bank and Trust Co
Priority date: 1951-03-22
Filing date: 1952-03-08
Publication date: 1955-01-18
Anticipated expiration: 1972-01-18

Description

Jan. 18, 1955 w. c. TER sTEGE ET AL. 2,699,969

VARIABLE ATOMIZER Filed March i8,\1952 INVENTORV- AGE T the liquid is also comparatively small.

United States Patent Ofi ce VARIABLE AToMIzER Willem Comels Ter Stege and Elize Meindersma, Dordrecht, Netherlands, assignors to Hartford National Bank and Trust Company, Hartford, Conn., as trustee Application March 8, 1952, Serial No. 275,584` Claims priority, application Netherlands March 22, 1951 3 Claims. (Cl. 299-86) This invention relates to improvements in or relating to variable atomizers for liquids. More particularly, it relates to an atomizer for liquid hydrocarbons which is easily adjusted for varying the atomization.

Liquid atomizers, in which the liquid is atomized with the use of compressed gas, are known. Such atomizers may be constructed to be such that the gas and the'liquid are supplied through separate tubes, both tubes being at an angle with one another., As a rule, the gas supply tube terminates in a tine aperture and the outlet port of The'output may be controlled by means of a needle, which is provided in the liquid port and which permits of wideninglor narrowing this port.` It has been found in practice that such an atomizer has various disadvantages. In the iirst place the liquid port frequently becomes obstructed by soil which is carried by the liquids or air. If the liquid is caused to pass first through a sieve, the meshes of this sieve cannot be chosen to be as small as the smallest liquid port, since then the liquid can no longer be sucked on owing to the excessive resistance to be overcome. In a practical form of the atomizer the diameter of the narrowest passage in the liquid supply pipe was 8 it; the minimum space of the meshes had to be 40 u. Consequently, impurities of less than 40 y. passed through the gauze, but were liable to stop up the passage. It is furthermore difficult to construct such an atomizer to be such that it may be used for various kinds of liquids and for different quantities of liquid. The needle described above permits, as has been stated, controlling the liquid output to a greater or smaller extent, but it does not readily permit the adaptation of the atomizer to different liquids and to maintain the controllability at the same time. Such a needle furthermore increases the risk of obstruction.

The atomizer according to the invention does not exhibit these disadvantages and is characterized in that the liquid supply pipe is closed at the end and is provided at a certain distance from this end with two apertures, one on each side of the pipe, the center of these apertures and the center of the aperture in the gas supply pipe being in line with one another, the aperture nearest to the gas supply pipe preferably being smaller than the opposite aperture and the spacing between the smallest aperture in the liquid supply pipe and the gas outlet port being adjustable. It has been found that with such an atomizer there is no risk of obstruction, since all the apertures may be provided for the greatest quantity of liquid to be atomized. The variation both with the quantity and with the nature of the liquid to be atomized is in the first place effected by the said control of the spacing, so that needles and similar control-members, which permit narrowing the port, are not provided. It has furthermore been found that an atomizer according to the invention can be manufactured in a simple manner.

In one embodiment of the invention the liquid supply tube is preferably rigidly secured at one end to the body of the atomizer, the tube having such a length and being made of such a material that the distance between the tube and the gas outlet port can be varied by elastic bending of the tube, provision being made of means to fix the said spacing each time at a particular measure. The material of the tube may, for example, be nickel or copper. The said embodiment has the advantage that a liquid-tight, rotatable coupling is dispensed with. Particularly in the case of petrol or paraffin oil, such a 2,699,969 Patented Jari. 18., 1955 coupling is difficult to be kept liquid-tight during operation.

' In a furtherlembodiment of the invention the free end of the tube is adapted to be displaced with respect to the body of the atomizer in a direction approximately at right angles to the center line of the tube and parallel to the direction of the gas supply. It is thus ensured that theatomized liquid enters the'burner proper invariably in the center. f

In a further embodiment of the invention the tube is displaced by means of a screw device.

In a further embodiment of the invention it is advantageous that the displaceability of the tube isy limited in an adjustable manner. It is thus possible to adjust the maximum and the minimum quantity of liquid to be supplied bythe atomizer within particular limits. As an alternative, the atomizer may be adjusted to a particular quantity of diiferent liquids.

' lIn a preferred embodiment of the invention, a simple construction is obtained, if provision ismade of an atomizer housing, which is provided with a connecting stub for the liquid supply pipe, oneend of the liquid supply pipe being secured in this stub, the tube being otherwise free in a groove provided in the housing, the other end being supported by a fork', which yforms part of an adjustable screw-provided in the atomizer housing.r Again in a further embodiment of the invention the screw cany be displaced by means of an arrestable nut, which is located in part in the atomizer housing.

In order that the invention may be more clearly underst ood and readily carried into effect, it will now be described more fully with reference to the accompanying drawing, in which one embodiment of the invention is shown and in which: Y

Fig. l is a view of a variable atomizer in the direction of the arrow and Fig. 2 is a sectional View of this variable atomizer taken on the line II--IL Reference numeral 1 designates an atomizer housing provided with two connecting stubs 2 and 3. To the connecting stud 2 is secured a pipe which leads to a liquid container; at the stub 3 a compressed gas is supplied. The liquid may, for example, be gasoline or paraflin oil, while the gas may be air. In the connecting stub 2 is secured a tube 4, for example by soldering. The other end of the tube 4 supports a rubber cap 5, which intimately fits about the tube. The tube itself is located in a groove 6, which is, for example, milled out of the atomizer housing 1. Consequently, with the exception of the fastening to the stub 2, the tube is quite free in the atomizer housing.- The tube has an outlet port 7 for the atomized liquid and, opposite this outlet port 7, is a second port 8, which is smaller than the port 7. The atomizer housing has a port 9, corresponding with the ports 7 and 8, forming the end of a duct 10, which is bored in the atomizer housing and which is closed by a screw 11. This duct 1t) communicates through a duct 12, which is also bored in the atomizer housing, with the connecting stub 3. The duct 12 is bored through and is closed by a screw 13. The ducts ltl and 12 may be cleaned by removing the s crews 11 and 13; the tube 4 may be cleaned by removing the rubber cap 5. The top end of the tube 4 is supported by a fork 14, which is secured to a screw 15. A milled nut 16 is provided around this screw and is located in part in the atomizer housing. The milled nut 16 is engaged by a spring 17, which is held at the other end by the screw 13. The screw 15 is furthermore provided with a nut 18. It is obvious that by turning the adjusting nut 16, the top end of the tube 4 is moved tohthe left, so that the spacing between the ports 8 and 9 is varied. Owing to this variation in spacing the quantity supplied by the atomizer is varied. Thus the atomizer may furthermore be rendered suitable for ilse with different liquids. The adjustable nut 18 limits the spacing between the ports 8 and 9. The tube 4, which is bent when adjusting the atomizer, is made of an elastic or resilient material, such as nickel or copper. The atomizer housing 1 is provided with two holes 19, in which taps can be screwed and with the use of which the complete atomizer may be secured, for example, to a burner.

to soil carried along. It is furthermore found that any air bubbles carried along can readily escape.

What we claim is:

1. A variable atomizer for liquids comprising a housing, a gas supply tube, a llexible liquid supply tube at an angle thereto, said liquid supply tube being rigidly secured at one endV to said housing and loosely supported at its other end, said gas supply tube having an aperture therein smaller than its internal diameter, said liquid supply tube being closed at one end and having two apertures therein, each diametrically opposed to the other in a side of the tube, the centers of each of said apertures in said liquid supply tube and the aperture in said gas supply tube being aligned, the aperture of the liquid supply tube nearest to the gas supply tube being smaller' than the other aperture in the liquid supply tube, and means to displace said liquid supply tube relative to the gas supply tube in a direction approximately at right angles to the center line of the liquid supply tube and parallel to the direction of said gas supply tube.

2. A variable atomizer for liquids comprising a housing, a gas supply tube, a lexible liquid supply tube at an angle thereto, said liquid supply tube being rigidly secured at one end to said housing and loosely supported at its other end, said gas supply tube having an aperture therein smaller than its internal diameter, said liquid supply tube being closed at one end and having two apertures therein, each diametrically opposed to the other in a side of the tube, the centers of each of said apertures in said liquid supply tube and the aperture in said gas supply tube being aligned, the aperture of the liquid supply tube nearest to the gas supply tube being smaller than the other aperture in ther-liquid supply tube,conduit `means between said aperture of the gas supply tube and the smaller aperture of said liquid supply tube, screw means to displace said liquid supply tube relative to the gas sulpply tube and means to limit the spacing between said tu es.

3. A variable atomizer for liquids comprising a housing, a connecting stub secured to one end of said housing, a fork member, a gas supply tube, a flexible liquid supply tube at an angle thereto, said liquid supply tube being rigidly secured at one end in said connecting stub and loosely Vsupported by a fork member at its other end,

' said housing also having a groove therein in which the free part of said liquid supply tube is located, screw means connected to said fork member, and an arrestable nut on said screw means, said gas supply tube having an aperture therein smaller than its internal diameter, said liquid supply tube being closed at one end and having two apertures therein, each diametrically opposed to the other in a side of the tube, the centers of each of said apertures in said liquid supply tube and the aperture in said gas supply tube being aligned, the aperture of the liquid supply tube nearest to the gas supply tube being smaller than the other aperture in the liquid supply tube, and an adjustable nut on said screw means to displace said liquid supply tube relative to the gas supply tube in a direction approximately at right angles to the center line of the liquid supply tube and parallel to the direction of said gas supply tube.

References Cited in the le of this patent UNITED STATES PATENTS 1,891,067 Spira Dec. 13, 1932 2,123,029 Vogel July 5, 1938 2,264,312 Mothersall Dec. 2, 1941