US 2039275 A
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April 28, 1936. E. J. McGRAEL LIQUID SOAP MIXING DEVICE Filed Dec. 29, 1934 Patented Apr. 28, 1936 UNITED STATES LIQUID SOAP MIXING DEVICE Edward J. McGrael, Pittsburgh, Pa., assignor to S. Strum: & Sons, Inc., Pittsburgh, Pa., a corporation of Pennsylvania Application December 29,1934, Serial No. 759,721
My invention relates to apparatus for mixing liquid soap and water and for discharging it' in a directed stream under pressure and for an apparatus wherein the flowing stream of water with which the soap is to be mixed operates to draw the liquid soap into the stream and effect the mixing of the soap and water.
In view of the widespread and extensive use of a mixture of soap and water in automobile establishments and other industrial enterprises,
it is important to provide apparatus for mixing the soap and water in the exact desired proportion without supervision thereof on the part of the user. It is undesirable to allow the unskilled performed.
The present invention provides an arrangement wherein the soap and water are automatically mixed in predetermined proportions and without the loss of any time, whereby the soap may be most efliciently and economically used.
' Moreover, the present invention provides an arrangement wherein the liquid soap is prevented from caking, air-hardening, or otherwise solidifying in the various parts of the apparatus so that the apparatus may be shut down over night, over the week-end, or for indefinite periods without accumulation of soap forming any part thereof where it would interfere with the proper functioning of the device.
The invention also provides a restricted discharge orifice for the mixture of the liquid soap and water so that the mixture discharged into a bucket or other container may be thoroughly mixed and cause the formation of an appreciable amount of suds above the surface of the mixture.
The invention may be readily understood by reference to the accompanying drawing, in which the single figure discloses, more or less diagrammatically, a view partly in section and partly in 45 elevation of one embodiment of my invention.
In the drawing, 2 designates a water supply line, to which is connected an aspirating device or ejector 3 by means of an elbow 4. The aspirating device may be of any one of a number of 50 standard makes or of any preferred construction and comprising the usual elements more or less conventionally shown, these being a cone-shaped nozzle or jet 5, the apex of which is directed into the open end of a venturi 6, there being an an- 55 nular suction chamber I. The venturl leads into a discharge pipe 8 to the end of which is fastened a control valve 9, below which is a discharge tube or spout II), the end of which is restricted so as to cause the mixture to be discharged in a compact stream. Communicating 5 with the suction chamber I of the aspirator 3 is a soap intake pipe II having an extension I2, which extends into the soap container or reservoir I3. The extension I2, which extends almost to the bottom of the container I3, is provided 10 at its lower end with a check valve I4, which allows a liquid soap to pass upwardly through pipe I2 but which prevents a back flow of any liquid. Pipe II has a regulating or needle valve I5 preferably located adjacent the point where 15 with the mixture, once the valve is properly ad- 29 justed the valve handle I6 may be removed or a wrench may be used to set the valve in place of the handle I6.
In the operation of the device, the opening of valve 9 causes water to fiowfrom the supply line 25 2, this being connected to any source of water supply. As soon as the water starts to flow, liquid soap will be drawn from the reservoir I3 through tube I2 and discharged into the suction space I, where it will be drawn into the stream 30 of water.
While the stream of water is flowing, the valve I5 is adjusted to allow the desired amount of soap to be drawn into the water stream. The valve l5 once adjusted need notbe again ma- 35 nipulated unless and until it is desired to change the proportionv of soap in the mixture issuing from orifice, I0. Since the valve 9 is below the aspirator, it is apparent that the pipe 8 and the aspirator will be always filled with water and the soap. intake pipe will be always filled with soap or water or a mixture thereof whether or not water is actually passing through the apparatus, the check valve it effectively preventing any back-flow of soap. The end of pipe I I where it discharges into the suction chamber I, as well as the valve I5, is thus always protected from at atmosphere by means of the water seal in pipe 2, elbow 4, and pipe 8. This prevents the discharge end of pipe II and valve I5 from becoming encrusted with dried or partly congealed soap, so that once the valve I5 is adjusted the amount of soap drawn into the water passing through the apparatus will always remain constant.
It is thus seen that I have provided by my invention a simple apparatus for mixing liquid soap with water in any desired predetermined proportion and one which is extremely simple and requires, after once being adjusted, no further manipulation by unskilled or unauthorized workmen, and no time is lost in mixing the soap and water, as the mixture of the desired proportion may be drawn just as rapidly as the plain water would flow from the usual supply tap. By operation of valve 9, any desired amount of a predetermined mixture of liquid soap and water can be readily obtained. Due to the restriction of orifice III, the water is discharged into the receptacle in such a manner that heavy suds will be formed in the bucket or other receptacle and .a further mingling and agitation of the soap and water will be effected.
I have illustrated and described the present preferred embodiment of my invention, but it will be understood that the invention is not one limited thereto but may be otherwise embodied within the scope of the following claim.
A device for mixing liquid soap and water in predetermined proportions, comprising a soap discharge tube for insertion in a container, a water supply pipe, 8. union between the water supply pipe and the upper end of said soap discharge tube, said union having an interior jet arrangement such that a flow of water through the union induces liquid soap to be drawn from the soap discharge tube into the water, a discharge member on the outlet side of the union having a manually operable valve for controlling the flow of water and soap mixture from the union, the arrangement being such that when the valve is closed water remains in the union to prevent the congealing of the liquid soap, and a check valve in the soap tube to prevent the flow of water from the union back through said tube. 20
EDWARD J. MCGRAEL.