US1483405A - Ejector - Google Patents

Description

A-SSAGS Feb. 12 '1924.

yH UD. 'YQDER EJECTOR Filed July s. 1.922 i www# Patented Feb. 12, 1924.

UNITED STATES PATENT OFFICE.

HOWARD D. YODER, 0F DETROIT, MICHIGAN, ASSIGNOR TO PENBERTHY INJECTOB COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

EJECTOR.

Application led July 3, 1922.

T0 all, whom it may concern: i

Be it known that I, HOWARD D. YoDEn, a citizen of the United States of America, re vsiding at Detroit, in the county of IVayne and State of Michigan, have invented certain new and useful Improvements in Ejectors, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to ejectors of that type in which water under pressure is utilized for periodically ejecting drainage water from a sump or other receptacle. With such constructions it is usual to turn on or of the actuating water head by the operation of a oat which is located in the sump. Thus the rise of water in thesump, by lifting the float, Will open the supply. valve and cause the operation of the ejector, While the lowering of the water in. the. sump by dropping the float will again close the supply valve and arrest further operation.

One difficulty which has been encountered in the operation of such mechanisms is the tendency for the fioat to assume a position where the supply valve is only slightly opened, thus interfering with the proper operation of the ejector and being wasteful of'the wat-er supply. To avoid this defect, I have provided means for temporarily delaying the movement of the float, both in its rising and falling, so as to secure a more positive action and a complete opening or closing ofthe valve. To this end the invention consists in the construction as hereinafter set forth.

In the drawings:

Figure 1 is a vertical central section through the ejecto`r as arranged in a sump; l Figure 2 is a section on line 2-2 of Figure 1.

A is the sump or other receptacle in which the drainage water collects. B is the discharge conduit which extends centrally down in said sump and is supported by a standard C having a strainer D for protectin@ the inlet and also provided with a foot va ve E for retaining sufficient water in the conduit B t expedite starting of the ejector. F is the ejector connected to the upper end of the conduit B and preferably eX- tcnding laterally therefrom and communicating with an upwardly extending conduit section G, which leads to the point. of dis,

Serial No. 572,661.

charge. The ejector is provided with the usual Venturi shaped chamber H and nozzle I which receives water under pressn'e from the supply conduit J. This supply is, however, controlled by a valve K which is normally closed and is only occasionally opened when actionl of the ejector is required. L is `the float for controlling action of the ejector, which, asshown, is sleeved upon the vertical conduit B. M is a lever for opening and closing the valve K, being pivotally attached to the stem of said valve and having a fulcrum link N attaching it to the ejector casing and a pair of links O for attachment to the float L. The links O preferably embrace the laterally projecting portion of the ejector casing F and are vattached to the float by the pivot P and to the lever M by the The construction as just described is open i to the objection, before referred to, that the float may assume a position where the valve K is only slightly opened, so that the ejector is not efficiently operated whiie the water supply is wasted. To avoid this result, I havemade a simple attachment shown in detail in Figure 2. This consists of a pair of' rollers R mounted in dogs S, which are attached to the opposite links O andproject inward therefrom into interference with the casing F. The dogs S are, however, resil- -ientljT yieldable, beingheld in normal posi tion by the tension of a spring T extending therebetween, .so that when sufficient pres.- sure is exerted by the float in either an up ward or downward direction, the rolls R will be forced by the casingF springing outward the dogs S. As specifically shown, the dogs S have their inwardly projecting portions carrying the rolls R passing through central slots U in the links O, while the lower ends of said dogs are loosely secured by the headed ends P and P2 ofthe y jectingfianges S at the extreme lower ends of the dogs which form fulcrum lbearings on the links O.

The links O are preferably -arranged to embrace the portion of the ejector casing F, which forms the restriction of the Venturi passage, land to give mechanical strength to this portion of .the casing it is provided with ribs F. These ribs cooperate with the rollers R to place a greater obstruction to the movement of the links than would be the ase if they were engaged with a round conuit.

In the complete operation of the device, when the water rises in the sump, the oat L can only rise to a point where the rollers R engage the casing F,4 this being insufficient to lift the valve K from its seat. As the water continues to rise in the sump, it will eventually create suflicient upward pressure on the float to overcome the resistance of the rollers R, whereupon the spring T will yield, the dogs S moving outward and the rollers R passing the ribs F. When the resistance is overcome, the float will quickly rise tothe higher level of water in the sump, in which position the valve K will be fully opened and the ejector set in operation. This will discharge water from the sump, dropping the level, but the float is not permitted to immediately drop with the water, as the rollers R contacting with the ribs F will still hold the float in raised position until the increasing weight again overcomes the tension of the spring T. As shown in Figure 2, the links O are formed from a single bar return-bent at its upper end, as indicated at O. Also, as shown in Figure l, the pivot Q, which attaches the lever M to the links, engages longitudinal slots O2 in said links, permitting a certain amount of lost motion. Thus the float in rising and falling first takes up the lost motion between the links and the lever, after which the dogs S come into action and restrain further movement, functioning in the manner previously fis. accumulated thereon, said means compris- Qing a stationary memberanda cooperating Vmember movable with said `float, and' con necting means-between said valve and-'fleat ,forvtransmittin'g the accumulated pressure on the float to said valve for effecting a full movement thereof.

2. The combination with an ejector, of a valve for controlling the supply of actuating fluid thereto, a float for controlling the opening and closing of said valve, a pair of links for connecting said float to the valve,

a stationary member between said links and spring-pressed dogs for engaging said stationary member to temporarily arrest movement of said links until pressure is accumulated to overcome the tension of the spring.

3. The combination with an ejector having a suction conduit, a' discharge conduit and a supply conduit for the actuating fluid, a float sleeved upon the suction conduit, a valve for controlling tl actuating fluid, a pair of links connected to said float and to said valve embracing a portion of the discharge conduit, and spring-pressed dogs on said links projecting inward therefrom into obstructive relation to said discharge conuit to delay the rising and falling of the oat.

4. The combination with an ejector casing having a suction conduit depending from a portion thereof and a discharge conduit rising from another portion, a supply conduit for', the actuating fluid connected to said ejector, a valve for controlling the fluid supply, a float sleeved upon the suction conduit, a lever for actuating said valve extending above the ejector casing, a pair of links pivotally attached at their lower ends to said float and at their upper ends to saidlever, said links embracing said ejector casing, and spring-pressed dogs engaging said links and extending inward therefrom into obstructive relation to said ejector casing, whereby the rise and fall of said float is delayed.

5. The combination with an ejector casing having a contracted Venturi portion and external ribs for strengthening the same, a suction conduit for said ejector, a supply conduit for the actuating Huid, a valve for controlling said fluid supply, a float sleeved upon said suction conduit, a pair of links connected to said float and embracin the ribbed portion of said -ejector casing, aglever for connecting the upper ends of said links to said valve, dogs secured to said links projecting inward therefrom provided with rollers for engaging said ribbed casing, and a spring for yieldably drawing said dogs inward into obstructive relation to said cas ing, whereby the rise and fall of the float is delayed.

In testimony whereof I aiiix my signature.

HOWARD D. Yonne.

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