US1213901A - Aspirator. - Google Patents

Description

E. B. PORTER.

ASPIRATOR.

APPLICATION FILED JULY 21.19l5. 121. 8,90% Patented Jan. 30, 1917.

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ASPiRATOR.

APPLICATION FILED mu! '27. \915.

11. 359@ 1!. a Patented J an. 30, 1917.

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r- W H n i ASPIRA'JJOR.

To all whom it may concern:

Be it known that I, ELBERT B. PORTER, a citizen of the United States, and a resident of Penn Yan, in the county of Yates and State of New York, have invented certain new and useful Improvements in Aspira tors, of which the following is a specification.

I have invented an improvement in aspirators or injectors, designed to operate intermittently at intervals that follow each other as often as required, to deliver fluid into a receptacle, such as a conduit; and my primary object is to provide an aspirator so constructed that a suitable agent or medium, which acts to put the aspirator into communication with the conduit, serves to insure the delivery of a suflicient quantity of fluid by the aspirator to enable the same to operate at its full capacity whenever the working parts thereof are actuated.

The above and other obiects and advantages of my invention will be set forth in the following description taken in connection with the accompanying drawings and be fully defined in the appended claims. I wish to have it understood, however, that the disclosure herein is illustrative only and involves but one embodiment of my invention; and that other constructions may contain the principle of my invention as the claims express and specify it. Otherwise stated, differences in the phrasing of the claims are intended to cover actual diiferences in structural details, that, under different conditions, I may find advisable to adopt; provided, of. course, such differences in details come within the scope and spirit of my invention as the claims recite the same. 4

On said drawings: Figure 1 is a side elevation showing a preferred form of my invention mounted in operative position; Fig. 2 is a vertical longitudinal section illustrating the internal construction of my im- Specification of Letters Patent.

Application filed July 27, 1915.

Patented Jan. 3% 1W1 "3.

Serial No. 42,121.

capable of being used in connection with the pressure generator covered thereby.

I employ the numeral 1 to indicate a delivery conduit which leads to a suitable reservoir; and the numeral 2 to indicate a plpe which unites the conduit 1 with a suitable pressure generating chamber, as described in my Patent No. 1,132,381. The conduit 1 and the pipe 2 are joined together by means of a suitable T-coupling 3; upon which is mounted the aspirator structure in position to discharge into the conduit 1 a supply of fluid from a tank or reservoir 4.

The body of the aspirator is indicated by the numeral 5, and it preferably has the form of a hollow cylindrical shell which can be screwed into the coupling 3 at one end, so as to be in line with the conduit 1, The interior of the aspirator body 5 also communicates with the pressure generator to which runs the pipe 2 by means of a pipe 6; the upper end of which is received in a threaded boss located preferably on the under side of the body 5. I also connect the interior of the aspirator with the tank 4 by means of a short length of pipe 7, which is received in the top of the aspirator body near the outer end thereof; and I wish to state here that whenever fluid under pressure is discharged by the pipe 2 into the conduit 1, the aspirator is operated by the action of fluid under pressure flowing through the pipe 6 into the element 5, so that the aspirator is put into communication with the conduit 1 and fluid from the tank 4 is discharged through the aspirator into the said conduit.

-Within the aspirator body 5 and at the inner end of the same is secured a head 8,

which has a hollow shank or tube 9 extend u extends through the tube 9 and projects he yond the outer end thereof. The counterbored opening in the head 8 conforms to the shape of the valve 10 and provides a seat therefor; and the stem 11 is of considerably less thickness than the discharge tube 9., so as to leave an annular discharge r for this valve.

passage or space between the same and the tube over its entire length. At its outer end the tube 9 is contracted slightly to provide a bearing for the stem 11; and is exteriorly threaded to receive a screw cap 12. The outer end of the stem has a head or flange 13 and between this head and the end of the tube 1 locate a spring 14:, which normally holds the valve 10 in closed position.

The tube 9 is provided with. a plurality of perforations or ports 15 inside the body 5 adjacent the pipe 7; and between these perforations and the head 8 is a movable plunger or piston 16 which fits snugly within the body 5 and has a passage through it conforming to the cross sectional shape of the tube 9. This piston can slide in the aspirator along the tube in both directions and it may be provided with ,packing 17 to prevent leakage. Normally this piston is urged toward the head 8 by a coiled spring 18 in the space or chamber between the piston and the end of the aspirator body 5; but is stopped by means of a projection 19, which prevents the piston from moving over to the left far enough to close the end of the pipe 6. The space or chamber in the aspirator around the tube 9 between the stop 19 and the head 8 is therefore always open; and I provide in the head 8 a plurality of passages 20 which surround the tube 9 and lead from the space in question through the seat for the valve 10. Consequently when pressure fluid flows through the pipe 6, such fluid can force the valve from its seat against the compression of the spring 14, by acting through the passages 20 against the inner side of the valve 10.

The pressure generating chamber to which the pipes 2 and 6 are connected will be provided with a water jacket, as clearly disclosed in my above mentioned patent; and from the water jacket to the tank 4 leads a pipe 21. The water or other fiuid used to cool the generator will therefore be heated by the time it reaches the tank and for that reason he more suitable for my purpose. The tank 1 may be provided with an outlet 22 and the pipes 6 and 7 may have controlling valves 23 therein.

Referring to Fig. 3, I show my aspirator mounted on the pressure generator set forth in my aforesaid patent. The numeral 27 indicates a power cylinder, and 28 a hollow piston therein. This cylinder has a water jacket supplied by a pipe 29, and also communicating with the pipe 21; At one end of .the cylinder is a combustion chamber 30,

separated from the cylinder by a wall or partition 31, in which is mounted a valve 32; the wall 31 of course having an opening The valve 32 has a cup 32' fitting into a cup 33 in the chamber 30, and fixed tothe inner wall by means of rigid arms 34. A rod 35 on the valve 32 passes through a perforation at the middle of the arms and the cup or dashpot 33, and outside of the chamber 30. The rod 35 carries collars 37 and 37 on its length outside the chamber 30; and between these collars, and encircling the rod is a cross bar 36 joined to two bars, one on each side of the cylinder 27. One of these bars is illustrated at 86.

They move longitudinally of the cylinder, 1

In practice, fuel is forced into the chamber 30 by causing compressed air to flow into the mixer and carry a predetermined amount of gasolene from the tank 38 into the chamber. The air is supplied by a pump actuated in unison with the piston 27, so that when the piston reaches the end of its instroke, there will be a full charge in the chamber 30. At this time the valve is closed; but before the piston stops its movement toward valve 32, it will strike this valve and move it from its seat. This may occur at the same time that the bars 36, which move in unison with the piston, cause the cross bar 36 to engage the collar 37 on the rod 35 to open the valve. The opening of the valve is preferably effected entirely by the bars 36; and when this happened the bar 36 will force the contacts 39 and L0 together. Hence the igniter will cause the mixture in the chamber 30 to burn, and

drive the piston to the left, away from the valve 32.

The pressure generated by the burning fuel in the chamber 30 will hold the cup 32 in the dashpot 33, till the bars 36, which move now in the opposite direction, with the piston, bring the cross bar 36 into engagement with the other collar 37 and close the valve. Of course the contacts 39 and 40 are normally separated. and as soon as the cross bar 36 is withdrawn, the contacts move apart. This may be insured by making the contact 40 in the form of a fixed leaf spring, as will be understood.

On the outstroke of the piston, the port 6' leading to the pipe 6 will first be uncovered, and some of the gases of combustion will press through the ports 20 and open the valve 10. The pressure of these gases will also impel the piston or plunger 16 rearward, and this plunger, combining with the pressure head of the water in the tank 4, will cause the water in the tube 9 to spurt past the valve 10 in to the pipe coupling 3. About this instant, the piston 28 uncovers the port 2, leading to the port 2, and the great body of the gases of combustion flows into the coupling to the pipe 1. Hence the water from the tank 4 is all vaporized.

The gases do not begin to flow through the pipe 2 till the valve 10 is opened; and then the pressure on the valve 10 will be about equal from both sides. The valve 10 may even close at this time, since it will have performed its function of admitting as much water as required into the coupling 3. The plunger 17 makes the admission of the water to the coupling quick and certain. It will be understood that the tube 9 will always be filled through the holes 15; but when pressure is applied to the plunger 16 through the port 6 being uncovered, the action of the aspirator is sharper, and there is a jet of water at the valve 10 leaping into the midst of the gases as they enter through the pipe 2.

The action of the aspirator is repeated when the piston 27 again moves inward; and the mixture of hot gases and steam is conducted to a reservoir at the end of the pipe 1. From this reservoir the mixture can be taken to power cylinders containing pistons to drive machinery. The water in the tank 4 is pro-heated by the jacket of the cylinder and the vaporization of the water into steam in the coupling 3 therefore takes place so much more rapidly and efficiently.

The connections between the piston 28, the pump which supplies compressed air to the mixer 38' on the instroke of the piston 28, and the bars 36, need not be set forth here, as they are fully described in my aforesaid patent.

My aspirator, when employed in connection with the pressure generator described in my aforesaid patent, enables me therefore to obtain a practically unlimited supply of gas under pressure to be used for power purposes; and the necessity of a boiler and furnace now ordinarily used in the production of pressure gas such as steam is eliminated.

Having described my invention what I believe to be new and desire to secure and protect by Letters Patent of the United States is 1-- 1. The combination of a delivery conduit and an aspirator mounted thereon, said aspirator having means movably mounted therein for putting the aspirator into and out of communication with the conduit, means for connecting the aspirator with a source of fluid to enable said first-named means to be actuated by the fluid to put the aspirator into communication with the conduit, a source of vaporizable liquid connected to the aspirator, and a movable memher in the aspirator operable by said fluid to act upon the liquid and facilitate the passage of the latter through the aspirator.

2 An aspirator comprising a discharge tube inside of the same and a chamber surrounding the tube and communicating therewith, means for supplying fluid to the chamber, a piston surrounding the tube, and means for putting the piston into communication with a source of pressure fluid to cause the fluid to be impelled quickly therethrough and out of the aspirator.

3. An aspirator having a valve and a seat therefor, said seat having one or more apertures leading to the rear face of said valve, and means communicating with said apertures for supplying fluid under pressure to the aspirator, said fluid acting through said apertures to move said valve away from its seat.

4;. An aspirator comprising a valve, means providing a seat for said valve, said means having apertures therethrough, means for conducting gases under pressure to said apertures to open the valve, a piston behind the valve to be also operated by the pressure of the gases, means for supplying water to the opposite face of said piston, and means for conducting said water to the space between the valve and the valve seat when the valve is opened, to cause the same to be vaporized by the said gases.

5. An aspirator comprising a discharge tube extending longitudinally therethrough, a valve at one end of said tube and having a stem projecting from the opposite end to the outside of the aspirator, means for supplying liquid to said tube, and means for supplying fluid to the aspirator and actuating said valve, to permit the liquid to pass the valve.

Signed at Penn Yanin the county of Yates and State of New York this 14th day of May A. D. 1915.

' ELBERT BALL PORTER.

Witnesses:

OLIVER SHEPPARD, H. K. ARMSTRONG.

@optea or this patent may be obtained for five cents each. by addressing the Commissioner of Patents, Washington. E. G.

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