US1105985A - Ejector. - Google Patents

Description

B. w MQOLYMONT. EJEO'I'OR. APPLICATION FILED BE PT. 11, 1911.

Patented Aug. 4, 1914.

affozncad UNITED STATES PATENT OFFICE.

BRYCE W. MOCLYMONT, OF DETROIT, MICHIGAN, ASSIGNOB T0 PENIBERTHY INJECTOR (10., OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

EJ'ECTOB.

Specification of Letters Patent.

Patented Aug. 4., 1914.

Application filed September I1, 1911. Serial No. 648,640.

To all whom it may concern:

Be it known that I, Baron WV. MCCLY- MONT, a citizen of the United States of America, residing at Detroit, in the county :of lVayne and State of Michigan, have invented certain new and useful Improvements in Ejectors, of which the following 15 a specification, reference being bad therein to the accompanying drawings.

The object of this invention is to produce a lifting ejector capable of a more extended use as a substitute for a pump for draining excavations, cellars and the like and for discharge arm being larger than that of the nozzle through which the motive fluid is introduced in the form of a solid jet cannot fill the whole bore of the discharge arm on account of the comparatively low pressure of the Water usually maintained in city water plants, Therefore there is a space between the wall of the discharge arm and the water jet and this space directly communicates with the suction pipe reaching down into the wall or space fromwhich the water is to be removed. At best only a slight reduction below the atmospheric pressure can thus be obtained especially if the ejector is discharging directly into the atmosphere, where the jet disturbs only that portion of the air directly in front of the nozzle. The air at the discharge end therefore travels back into the suction. pipe by reason of the difference in pressures and destroys any practical lift in an ejector having a straight discharge arm unless the dis charge arm is of such excessive length as to render the manufacture of such ejector costly and impracticable.

In order to get the greatest possible lift from an ejector built within practical proportion it is necessary to use means to disperse and break up the operating jet of water issuing from the power nozzle of the ejector so that it would completely block up the discharge bore of the ejector and thus seal it against the back travel. of air. I accomplish this by means of a bend in the discharge arm which compels the water issuing from the, power jet to spread out and form a curtain across the di charge passage thereby sealing it against the back flow of air into the suction pipe, all as more fully hereinafter described and shown in the accompanying drawings, in whicb Figure 1 is a central longitudinal section through a preferred form of ejector en'ibodying the invention; and Fig. 2 is an elevation of a modified form of construction.

As shown in Fig. 1, the ejector has :1 using formed with a cylindrical portion 1, a conicallv tapering portion. 2, a sinuous neck portion 3 and a. cylindrical end portion 4 offset to one side from the axis of the portions 1 and 2 by the sinuous portion 3. A jet nozzle (5 projects into one end of the casing through the portion 1 and partially into the portion 2 in axial line therewith and is provided with-suitable means such as the coupling member 8 for attachment to a pipe or hose for supplying it with water under pressure as the motive fluid. An arm 5 extends at right angles from the casing and leads into the space surrounding the jet nozzle; it is provided with suitable means for attachment to a hose leading into the sump or well which is to be drained.

In practice the ejector being supplied with the motive fluid, a solid jet of water will be projected from the nozzle directly against the wall 9 to 12 of the sinuous portion of the passage and then be huddled across the passage against the opposite wall 10 to 11. It thereby forms a water curtain across the discharge passage which blocks the same against any inflow of air into the space or vacuum chamber surrounding the nozzle. The power jet is thus enabled to create and maintain a strong enough vacuum to lift the water into the vacuum chamber from a considerable depth and rendering the ejector self starting.

In the modification in Fig. 2 the discharge. arm is provided with a double ogce bend instead of a single ogee bend as in Fig. 1; but its construction and operation is otherwise the same as that in Fig. 1.

While the drawings show an ejector integrally formed in one piece, it may be built lip of separate parts and the proportion ofthe parts may be altered conditions of use.

What I claim is In a lifting ejector, the combination with a power jet, of a casing forming a vacuum chan'iber around said jet and extending beyondthe same in a direction parallel to said jet to provide a discharge arm: forming a discharge passage, said passage being proyided within striking distance of the jet to suit different with an ogee bend having cooperating, de-

fleeting surfaces, one being in the inner end of said discharge arm and alining; with the jet and the other being in the bend of said gles to the line of discharge from said jet, whereby a single aqueous air excluding curtain is formed intermediate the ends of the discharge passage.

In testimony. whereof I aflix'my signature in presence of two Witnesses.

BRYCE W. MCCLYMONT. W1tnesses:-

LEWIs-E. FLANDERS, O'r'ro F. BARTIIEL.

arm and disposed substantially at right an-

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