US681382A - Feed-cup for explosive-engines. - Google Patents

Description

Patented Aug. 27, |90I.

2 sneefs-snet E. WESTMAN.

FEED CUP FOR EXPLSIVE ENGINES.

@Application led Nov. 2, 1900.\

(No Model.)

Patented Aug. 27, 190i. E wESFMA-.hh

FEED GEHr FDR EXPKQSNEEMGINES.

(Applicatiam ledi Hum, 2.. 1900.1

2 Sheets-Sheet 2.

(No Manel.)

y l lll-...llnmmllli l 1 l I L! UNITED STATES PATENT OFFICE.

EMIL WESTMAN, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO TIIE ENTER- PRISE MACHINE COMPANY, OF SAME PLACE, (PARTNERSHIP COMPOSED OF NVILLIAM KAMPFF AND N. G. SAMPSON.)

FEED-CUP FOR EXPLOSIVE-ENGINES.

SPECIFICATION forming part of Letters Patent No. 681,382, dated August 27, 1901.

Application filed November 2, 1900. Serial No. 35,208. (No model.)

To all whom. t may concern: v Be it known that I, EMIL WESTMAN, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Feed-Oups for Explosive-Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable oth- Io ers skilled in the art to which it appertainsto make and use the same. My invention has for its object to provide an improved feed-cup for explosive-engines. To this end my invention consists of the I 5 novel devices and combinations of devices hereinafter described, and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein like notations re- 2o fer to like parts throughout the several views. In said drawings, Figure 1 is aview, partly in elevation and partly in section, with some portions broken away, illustrating my improved feed-cup as applied in Working position. Fig. 2 shows the feed-cup detached in vertical section on the line x6 c6 of Fig. 1. Fig. 3 is a view of the cup in horizontal section on the line x7 m7 of Fig. 2; and Fig. 4. is a view showing the feed-cup,partly in elevation 3o and partly in section, on line ms x8 of Fig. 3.

The valve-chest 2 is attached to the cylinder-casting 3 in the customary or any suitable way. The valve-chest 2 is tapped by an exhaust-pipe 21. The intake-valve 8 of the 55 engine is seated in the branch 22EL of a suitable casing, the other branch of Which 'is marked 22D. This valve-casing 22a 22b is detachably secured to the valve-chest 2 and is suitably recessed to afford the commingling- `4o chamber for the explosive mixture, which is drawn into the engine under the suctionstroke of the piston. The part 22b of the valve-Casin g projects at right angles from the part 22 of the casing, as clearly shown in Fig. 1, and is tapped by the air-supply pipe 23 and the feed-cup 24, which will new be described in detail.

The feed-cup 24. is preferably formed with a glass body c and metallic ends c c2. The

bottom end c' is preferably made in the form of a casting, having formed integral therewith an inlet-pipe section c3, tapped by the oil-supply pipe 25, leading from the pump or other source, a dischargehead c4, having formed therein a passage c5 for delivering the oil from the feed-cup to the comminglingchamber of the engine, an overflow-pipe section c5, tapped by a return-pipe 26, leading back to the gasolene-tank, (not shown,) and a starting cup or cell c7, tapped by a passage cs, leading to the ou tlet or delivery section of the discharge-passage c5 from the head c4 of the feed-cup 24. Said passage c8 from the starting cup or cell o7 is normally closed by a hand-valve 27. The inlet-pipe section o3 of the feed-cup is shown as plugged or closed at its upper end, but as provided with lateral discharge-openings near its top. The overflow-pipe section c6, receiving from its open upper end, determines the height of the oillevel which is maintained within the feedcup. The discharge-passage c5 Within the discharge-head c4 receives the oil from a point below the oil-level in the cup, preferably from near the bottom of the cup, as shown in Fig. 6, and then rises, as shown, within the cup itself to a point above the oil-level in the cup and is subject to va needle -valve 28, seated in the head c4, and passses thence downward and outward, as shown, through the projecting and screw-threaded end of the discharge-head c4. As shown, the needlevalve 28 has screw-threaded engagement with an internal thread formed in the reduced upper end portion of the discharge-head c4. The needle-valve 28 is provided with an airinlet duct f for a purpose which will presently appear. rlhereduced upper end portion of the discharge-head c4 is screw-threaded on its exterior and is tapped through the cap of the cup and engaged by a draw-nut o9 as aconvenient means for clamping together the ends and the body of the cup. The needlevalve 28 is also screw-threaded on its exterior and is engaged by a set-nut 29 for locking the valve in whatever position it may be set. The lower end projecting portion of the discharge-head c4 being screw-threaded, as

shown, affords a convenient means for ap'- plying the; cup directly to t'ne top of the intake-valve casing, as best shown in Fig. 3.

With this construction and disposition of the parts of the feed-cup the action thereof is as follows: The gasolene or other oil is supplied from the pump orother source to the feedcu p through the inlet-pipe section c3 and will accumulate therein to the level of the overflow-pipe section c6. The oil is drawn from the feed-cup under the suction action from the engine-piston when making the suctionstroke. The oil having been started through the passage c5 by the suction-stroke of the engine-piston would continue to iiow after the piston had completed its Suction-stroke ou the si phon principle, owing to the relative levels of the feed-cup and the point of discharge to the commiugling-chamher of the engine, were it not for the presence of the airduct f in the needle-valve 28. This air-duct f in the needle-valve 28 aords a supply of air to the oil-feed passage c5, thereby preventing the establishment of any siphon action in the delivery-passage from. the feed-cup, and also serving the further important function of introducing a small jet or current of air at the axial center of the moving column of oil within the discharge-section of the deliverypassage c5 from the feed-cup. Hence more or less air will be com mingled with theoil be;= farei@ reaches the Commingliug-chember or main airTsupply pipe of the engine. At the point of delivery to the main air-snpply pipe the inmoving column of oil contains afjet of air at its center or axis and is then en veloped on its exterior by the inrushing body of air from the air-supply pipe 23, thus insuring a most thorough commingling of the air and the oil before reaching the intake-valve 8. The starting cup or cell c7 is of less height than the overflow-pipe section c6, and hence when the engine is running the starting-cell will constantly be full of oil. As the feed-cup stands above the level of the eomminglingchamber in the intake-valve casing, itis of course obvious that the oil will flow by gravity from the starting cup or cell c7 whenever so desired. To obtain a starting charge of oil, it is therefore only necessary to open the passage c8 from the starting-cup c7 by inanipulating the hand-valve 27. This is a great convenience, as' it enables the engine to be started very quickly. In order that the startthe feed-cup 2t by gravity, as is desirable for quick` starting, it follows that the feed-cup 24 must b e above the level of the point of discharge of the oil within the comminglingchamber of the engine. It follows that the delivery-passage c5 for the normal oil-feed from the feed-cup 24 must at some point between the inlet thereto and the discharge therefrom rise above the liquid-level within the feed-cup, or otherwise the, c1111 would empty by gravity. As shown, the delivery or feed passage c5 from the feed-cup rises above the oil-level of ,the cup within the cup itself. The rise, however, might be outside the cup if a suitable pipe were employed. It is convenient that the duct cS from the starting-cell should tap the main or normal feed-passage c5 from the cup. With that construction it follows that the point of discharge into the commingling-chamber must be below the liquid-level of the cup in order to permit the starting charge from the cell c7 to flow by gravity therethrough. Hence a siphon action would necessarily follow were it not for the presence of the supply of air to the said delivery-passage c5 through the ductf of the needle-valve 2S or other means provided for that purpose. Of course the air-supply to the said feed-passage c5 might be otherwise obtained than through the controlling-valve 28,

so far es preventing the Siphon action is con#l c erncd. The needle-valve 28 might also be applied to the delivery-passage cffrom the. feed- Gur at any other convenient point, and nevera theless beprovided with the open airdnctf, as long as the top 0f the duct f was above the Oillevel in the cup.` The construction illustrated is, however, the most convenient. The feed cup as thus constructed is also extremely simple and cheaply made. Without the airinlet to the delivery-passage from the feedcup l found by experience that an excess ive feed of oil occurred under the Siphon action after the suction-stroke of the pistou .had ended. This greatly interfered with the best action of the engine and also Wasted oil. This provision of means for breaking the Siphon or preventing any Siphon action from the feed-cup is one of the most important features of my invention. The gravity-feed starting-cell crl is another.

It will be understood that the details of my invention may be changed without departing from the spirit thereof. s

What I claim, and desire to `Secure by Letters Patent of the United States, is as follows:

1. A feed-cup for explosiveenginesmaving 1 an inlet for receiving the gasolene or other hydrocarbon, from the pump or other source,

an overiiow-outlet from a point above the bottom of the cup, a discharge or engine-'feed passageV which, at some point between its rejceiving and delivery ends, rises above the liquid-level in the cup and delivers to the en; gine below the bottom o f said cup, and which diseharge-passage is provided with an air; ing charge may feed from the cell c" within inlet, whereby any Siphon action from said passage is prevented and a portion of air enters with the hydrocarbon oil, substantially as described.

2. A feed-cupfor explosive-engines having an inlet for receiving the gasolene or other hydrocarbon oil from the pump or other source, an overtlowioutlet from a point above the bottom of the cup, a` discharge or enginefeed pass'ige, which, at some point, between its receiving and delivery ends, rises above the liquid-'level in the cnp and delivers to the engine, below the bottom of said cup, and a IOO needle-valve seated 1n said discharge-passage, for controlling the same, and provided with an axial air-inlet duet, substantially as and for the purposes set forth.

3. In au explosive-engine, the combination with the normal feed devices for the gas or oil, of a gravity-feed starting cell or cup normally charged from said main feed devices and provided with a hand-valve, substantially as and for the purposes set forth.

4. Afeed-cup for explosive-engines,having an inlet for the oil or gas, an overflow-outlet from a point above the bottom of the cup, a discharge-passage for the normal feed to the engine, and a starting cell or cup below the oil-level Within said main feed-cup, and equipped with a hand-valve controlling the delivery-passage therefrom, substantially as and for the purposes set forth.

5. The feed-cup 24, having the oil or gas inlet c3, the overfiow-outlet c, the dischargehead c4 provided with the discharge-passage l EMIL wEs'rMAN.

'Witnessesz GEO. D. SAMPsoN, WM. KAMPFF.

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