US711671A - Liquid-supply apparatus. - Google Patents

Description

No. 7||,67|. Patented oct. 2|, 1902.

E. T Mluua4 Y y LIQUID SUPPLY APPARATUS.

v l' (Application filed Jau., 2, 19.02,) l (No Model.) l 2 Sheets-Sheet I.

No, 7u,s7|. Patented yorxfzl, 1902.

E. T. Mums.

LIGUID -SUPPLY APPARATUS.v

(Appliation file Jan. 2, 1902.)

2 Sheets-Sheet 2.

f 3% 5 2 j .5' 32 f 5 y Nv y f mi UNITED STATES PATENT OFFICE" EDDY T. MCKAIG, OF CHIOAGQILLINOIS.

LIQUID-SUPPLY APPARATUS.

SPECIFICATION forming part of Letters Patent No. 711,671, dated October 21, 1902. Appnmiov ned January 2,1902. serial No. 88,083. (No modem To all whom t may concern.- Y

Be it known that I, EDDY T. MCKAIG, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Liquid-Supply Apparatus, ofV

which the following is a specification.

My invention relates to a novel apparatus for maintaining a supply of liquid at a constant pressureand while I have shown my invention as applied to maintaining a supply of gasolene or some other liquid hydrocarbon at a, uniform pressure for the purpose of operating a gasolene-engine it will be understood that it is capable of use in any other connection Where it is desired to keep a supply of liquid at a constant pressure.

To illustrate my invention, I annex hereto two sheets of drawings, in which the same reference characters are used to designate identical parts in all-the figures, of which- Figure 1 is aplan view of my invention as applied to a gasolene-engine. Fig. 2 is a side elevation of the same. Fig. 3 is a plan view ofthe pumping mechanism, on an enlarged scale; and Figs. 4, 5, 6, and 7 are vcrticalsections on the lines A A, B 13,0 C, and D D of Fig. 3, respectively. v I have shown my invention as applied for convenience to a gasolene-engine of the type shown in my application, Serial No. 73,353, led August 26, 1901, and by reference to Fig. 2 it will be seen that I have grouped together on the base 10 the engine 11 at one end, the oil-supply tank 12 at the other endyandthe pumping mechanism 13 intermediate. As a matter of convenience I may support the water-supply tank 14 upon a platform -15 over the oil-supply tank, the platform 15 resting on the sills 16 on either side of the oil-supply tank 12. The oil-supply tank 12has the pipe 17 leading from it to the pumping apparatus. 13, by which a constant stream of oilis drawn;

ciprocate in a straight line despite the swinging movement of thelever 23, which .is pivcured to a projection from the cylinder 21 of the engine.

pivotally connected, as at 26, to the link 2,7, which is reciprocated at convenient intervals, such as each revolution of the shaft 28, by means of any suitable mechanism-such, for instance, as shown in my aforesaidI applilcation,` Serial No. '73,358.-

The pumping apparatus proper is in the preferred form of my invention all included in the casting 29, which is preferably of a generally cubical shape and is provided at its lower side with the iiange 30, by which it may be secured to the base 10. The piston 22 reciprocates in the barrel 31, located in the corner of the casting nearest the engine. As shown, the lower portion of `this barrel is formed by the interior. of the casting itself, whilethe upper portion is formed by a tube cap or gland 3la at its upper end to prevent any escape of the oil. To prevent the hydrostatic pressure ofthe oil inthe reservoir 12 from tending to force the oil out through the gland, I locate the gland above the plane of the top of the reservoir. is connected at its lower end by the horizontal channel or passage 32 with the valve-chamber 33, which is similar in shape to the barlvrel 31,V but has its-upper end closed bythe screw-plug 34, which may have the recess'35 thereinto guide the upwardly-proj ecting stem 36 of thevalve 37, which rests on the valvevseat 38, formed between the chamber 33 and the reduced passage 39, forming a downwardly-extending continuation of the cham- :her 33 and opening into the horizontal passageI -40,*into which is screwed the end of the it will be apparent that as thepiston-is raised the horizontal passage. 40, upward through the passage 39 past the valve 37 into the valve-chamber 33,through the horizontal passage 32, and into the barrel 31. As the piston descends the check-valve 37 prevents the return of the oil, so that it is forced downward through the vertical passage 41, form- .ing the reduced extension of the barrel 31,

oted at 24 to a bracket 25, conveniently se- The barrel 31 the oil will be drawn from the pipe 17 throughy elongated slot, so that the piston 22 .can re- The otherendof the'lever 23 is screwed therein and provided with a packing oil-supply pipe 17. With this construction los` through the horizontal passage 42, thence upward through the vertical passage 43, which opens by means ot the valve-seat 44into the enlarged valve-chamber 45,1ocated diagonally Opposite to the valve-chamber The upper end of this valve-chamber 45 is closed by the screw-threaded plug 46, similar to the plug 34, and contains the check-valve 47, cooperating with the valve-seat 44 and similar to the check-valve 37. The oil passing this valve 47 as the pumppiston descends is forced through the horizontal passage 48 across to the chamber 49, which is diagonally opposite to the barrel 31. This chamber 49 has screwed or otherwise secured in the upper end thereofthe outer tube 50 of the standpipe 18, which extends to any height necessary to secure the desired pressure and preferably has its upper end covered, but not closed air-tight, as by the cap 51. The smaller interior pipe of the stand-pipe extends nearly to the pipe 50, has its upper end open, and its lower end is screwed or otherwise secured in the reduced downwardly-extending portion 53 of the chamber 49. This extension 53 is connected by the passage 54 with the passage 40. The chamber 49 has opening into it the oil-discharge pipe 19, which, as seen in Fig. 7, is screwed into a suitable recess leading from the side of the casting into the chamber 49. For convenience in constructing the passage 42 it is bored from one side of the casting, and the portion of the passage thus formed outside of the channel 41 is filled by a plug 55.

The operation of the complete apparatus will now be readily apparent. As the pump is constantly operated while the engine is running, the supply of liquid fuel drawn from the tank 12 is pumped into the chamber 49, where if the pressure exceeds that desired the oil rises in the stand-pipe outside of the inner pipe 52 until it reaches the top, when it overllows and descends through the inner pipe 52 and then flows through the passage 54 back to the oil-supply pipe 17, whence any surplus of oil is immediately drawn back through the pump, so that a constant supply is maintained without the necessity of drawing any more than the amount consumed from the tank l2, and the supply is maintained at the uniforln pressure caused by the height of the column of oil in the stand-pipe 18.

While I have shown my invention as embodied in the form which I at present consider best adapted to carry out its purposes, it will be understood that it is capable of modifications and that I do not desire to be limited in the interpretation of the following claims except as may be necessitated by the state of the prior art.

What I claim as new, and desire to secure by Letters Patent of the United States, is-

1. In a device of the class described, the combination with a supply-reservoir, of a pump, means for operating said pump, connections between said pump and supply-reservoir, a stand-pipe connected to said pump, a discharge-pipe connected to said stand-pipe, and an overiiow-pipe in said stand-pipe opening into the connections between the pump and the supply-reservoir.

2. A pump consisting of the four rectangularly-disposed chambers, check-Valves in two of the diagonally opposite chambers, a discharge-pipe connected with one and a pumppiston in the other of the remaining chambers, passages connecting the pump-chamber with the check-valve chambers, a supplypipe connected to one of the checkvalve chambers, and a passage connecting the other check-valve chamber and the chamber connected to the discharge-pipe.

3. A pump consisting of the four rectangularly-disposed chambers, check-valves in two of the diagonally opposite chambers, a discharge-pipe together with a stand-pipe having an overiow connected with one and a pump-piston in the other of the remaining chambers, passages connecting the pumpchamber with both the check-valve chambers, a supply-pipe connected to one of the checlvalve chambers, and a passage connecting the other check-valve chamber and the stand-pipe chamber.

4. A pump consisting of the four rectangularly-disposed chambers, check-valves in two of the diagonally opposite chambers, a standpipe having an interior overflow-pipe and a discharge-pipe connected with one, and a pump-piston in the other, of the remaining chambers, passages connecting the pumpchamber with both the check-valve chambers, a supply-pipe connected with one of the check-valve chambers and with the overlowpipe, and a passage connecting the other check-valve chamber and the stand-pipe chamber.

5. A pump comprising the casting having the four chambers therein, the first one containinga check-valve and having a supplyopening therein below the check-valve, the second containing a piston and connected with the first by a passage opening above the check-valve, the third containing a second check-valve and connected with the second chamber by a passage opening into it above the second check-valve, the fourth one having a stand-pipe and a discharge-aperture and connected to the third by a passage opening into it above the second check-valve, an overflow-pipe in said stand-pipe open at its upper end and having its lower end passing through the bottom of the fourth chamber, and a passage connecting the lower end of said overflow-pipe with the supply-opening of the first chamber.

In testimony whereof I affix my signature in presence of two witnesses.

EDDY T. MCKAIG.

Witnesses:

JOHN H. MoELRoY, HATTIE O. I-IALvoRsoN.

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