US823039A - Valve-gear for explosive-engines. - Google Patents

Description

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No. 823,039y PATBNTBD JUNE l2, 1906.

4 F. B. ELLS. VALVE GEAR POR EXPLOSIVE ENGINES.

APPLICATION FILED 5613251904. 3 SHEETS-snm' 2 No. 823,()39v PATBNTED JUNE 12, N306 P. B. ELLS,

VALVE GEAR POR BXPLOSIVE ENGINES.

APPLIATION FILED JULY25.1904.

3 SHEETS--SHEET 3 UNITED STATES i PATENT OFFICE.

VALVEFGEAR Fon ExPLoslvE-ENGINE'S.

Specification of Letters Patent.

Paneele@ :une 12,1906.

Application filed July 26, 1904. Serial NQ. 217,917

To all whom, t may concern:

Be it known that I, FRANK B. Eure, e @iiizen of the United States, residing et Hutchinson, in the county of McLeod and State of Minnesota, have invented certain new and useful Improvements in Valve-Geer for Exlosive-Engines; and I do hereby gleehire the lbllowing to b e a, full, clear, and #ei-reet de Scription of the invention, such :is will enable others skilled in the art to which it :ipperA teins to make and use the seme.

M invention relates to explosive-engines, and as for its object to improve the seme in the several particulars hereinafter noted.

The invention consists of the novel dei-does and combinations of, devices hereinafter doscribed, and defined in the claims.

In. the aooompanyin drawings, which i1ustrete my invention. li ie f "haraictere indicato like parte throughout the se. rel I: ierfs.

Figure 1 is a plan 'View ish. iig en explosi'veengine of the fone-cycle i e lier ing the several features of my ir utioo applied thereto. Fig. i2 is a View' principally in side elevation, but with somo parts sectioned and with others broken away, illustrating the partsshown in Fig. l. Fig. a detail in section illustreting on e. larger scale than in the other views the eonstruijtiou of the pump-plunger. lling, 4 is n View (.iirreszjionding to Fig. 2, brit illustrating fli'll'eient poel" tions of the parte; and Fig. .f3 ie :1 sorti-.iii en the line JY" of Fig. 4.

The numeral l indi-oboe the heee. ize nu merel the eylinder, the mineral gine crank-shalt the nun merel 4. the and the nuzzieml the rraiuierni plosireengine of the 'forumup-li Air is drawn into the eyiiiiler delivery-pipe 6, which, shown. leeds labern the en ine-bese i. The eeuu-l vulve trois t 1e admis-sion of air imo the cylinder from the pipe 6, the seid valve f Whielrwill oper. under suction from the cylinder, but will eine@ under the an explosion.

The numeral 8 indicates the stem of thefrlmuet-vzilvo, which of the nenni unstruction and is subject to e spring Q, whirli musee Suid vulve to ammnetiifally close. 'Thinv me heit-valve when pressed inwnrfi opens: up enoxheuet-I'mrt 10.(ixienili11gIrma ilu. offlinrler, :is Shown in Fig. l. l

A., sparking dnviic of the usual rxonsixlu tion is employed, and for ille purposes@ of this Yi r frmmovable member ofthe paia' of electrodes has e projecting trunnion 1l, to which is secured e. short erm 12, that is subject toe springpreesed bolli 13,' which holt is mounted to slide through seid arm 1'2 end through a. lug projection of a. breeket 14, secured to the side of the oylindenoasting 2. A collar onythe bolt 13 normally presses against the arm 12. To the projecting end of the bolt 13 is pivoted a short arm 16, which in tum is pivotedat 17 to the bracket 14. To .ihre de )ending end of seid erm 16 ie'loosely pivote a. bevel-nosed grevity-he1d dog 18. .A coiled spring 20 on the bolt 13 reacts against the bearing-lug of the breeket 14 and against the coller 15 of seid bolt. 'A coiled spring 2i on said bolt bet-Ween the arme 153 and 16 yieldingly holds the former against the coller 15.

Interposei ih the air-delivery ipe 6 is e. pump of nevel Roost-motion, an vwhioh; ee shown, comprises e cylindrical casing 2, which is divided into upper and lower ei pertmente 'and 24. The u per compartment 23 constitutes a part of t ie aizdelivery passage through the p1 e 6. The lower compartment 24 is kept l ed, approximately to a constant level, with gesolene, which may' be supplied thereto from any suitable source and by any suitable means through an ordi- {1er}- pipe werke rertieelly thrmih the upper Walls of the eileoliz'iinber 24 and upper com ertinent .23 and :it its lower end is biiureate et 2'? to i for e smell oil-cup 2S, which is im ...ieri to the lower portion of seid piston. This 'pivoied oil-eup et' one side has an am vll hen the piston 26 is lowered, ae In Fig. engages the ienged pieton prima@ 24a of the oil-uomperiment 24 and l the said (flip in sin upright position. it?

nee. however. the pump-piston is raised, as

. s o then )per compartment 23, the said f orf-rile :inf-es seni cup and causes the I iig; over and degne-it the oil ce1-fied iiiio the eireupply passage t0 the arenile?. Under the downward movement :al vthe piston 25 ilu* arm 29 will of course gein turn the sup 254 into an upright posii'wm. At, im upper end the piston 26-is eennwfted by eehmt link to one firm of a. bellornnk 3 i which bell-@flink ie uivotally mounted on e stud 32, rejected lrom one Side oi im eylindm 2. 'injecting from the seme sid(- of the cylinder in close proximity to the A Dump pist-on or plunger 26 :o in Fig. 4, and the pivoted cup is` een rob caso iiie only necosssmy lo siete that the l sind 32 is another but heavier stud 33,' andV IXO mounted on this stud is an oscillating arm 34, the free end of which is connected by an eccentric-rod 35 to aneccentric 36, carried by the engine crank-shaft 3. This oseillatin arm 34 carries a tappet-arm 37, the end o which, under a rearward movement of said arm 34, engages the cam end ofthe dog 18, presses the same downward against the stpfpug 19 of the arm 16 and forces said arm,

plunger 20, and the arm l2 of the movable electrode toward the left with respect to Fig. 2. This movement of the arm 12, it may be here stated, forces the movable electrode against the fixed electrode of the electric igniter, and the spark is produced in the usual wa by the separation of the electrodes, whic takes lace when the tap t 37- passes below the eveled end of the ggg 18. Under a movement of the arm 34 forward with respect to Figs. 2 and 4 the dog 18 freely rises to permit the tappet 37 to pass.

A11 oscillating lever 38, which, as shown, is

toward the right curved, is pivotally connected at its upper :to a bracket 46 with its end to the oscillating arm 34 and at its lower end is connected by a link 39 to the depending arm of the bell-crank 31. Loosely mounted on the stud 33 outward of the arm 34 is a ratchet-wheel`40, which carries a plurality of radially and laterally projecting fulcrum-lugs 41, which are adapted to be engaged, as presently described, by the intermediate portion 38 of the lever 38. The oscillating arm 34 carries a driving-pawl 42, that engagesthe teeth of the ratchet 40. A s ring-pressed retaining-pawl 43, which, as s own, is pivoted on the stud 32, o erates on the ratchet-wheel 40 'to prevent ackward rotations thereof. As shown, the ratchetyvheel 40 has eight teeth and four fulcrumith the construction described it is evident that the arm 34 will be iven one complete operation for each comp ete rotation of the crank-shaft. The stroke of said arm is such that for each rotation of the crank-shaft the driving-pawl 42 will move the ratchetwheel 40 a step of movement equal to one tooth-to wit, one-ei hth of a rotation. The ,lower arm of the be -crank 31" is connected by` a rod 44 to one end of a lever 45, pivoted free end pressing `.against the projrecting end of the -exhaustvalve stem 8. he bracket 46, as shown, is ri idly attached to the head of the cylinder 2. i n the position of the partsshown in Fig. 2 o ne of the ulcrum-lugs 41 stands in osition for engagement with the intermedia e bearingfportion 38a of the lever `38, so that the arm 3'4, being then given a movement toward the ritght, sald lever 38 will he rocked on the said ulcrum-lug and its lower end will be caused to move toward the left, and thereby through the connections described positively force the exhaust-valve inward into an open position and the pump-piston 26 downward into the position shown in Fig. 2. Under the next rotation of the crank-shaft the ratchetwheel 40 will be given one step of movement which will carry the space between two of the fulcrum-lugs 41 into line with the bearingsurface 38l of the lever 38, so that the said lever, under the movement of the arm 34 toward the right, will find no fulcrum over which to rock, and hence will simply move pivotall on Athe link 39 and will not operate either the exhaust-valve nor the pump-piston.

The u per end of the pump-piston 26 affords a lock-slioulder with which engages one arm of a two-armed lock 47, the shaft of which is mounted in a bearing 48 on the cylinder 2, and the upper arm of which, as shown, is yieldingly pressed outward by a spring 49. (Shown m Fig. l.) Each time the pumppiston 26 is forced downward into t. e position shown in Fi 2 the lower arm of the lock 47 en ages with the up er end of said istoii, and thereby locks t e same in its owered position and locks the exhaust-valve in open position. This lock is adapted to be released b an automatic governor, a suitable form of which is illustrated in the drawin s. Thegovernor, as shown, isin the form o a wei hted arm 50, which is pivoted to and carriedg by the eccentric-rod 35, and is provided with an arm projection 51, the lower end of which terminates in a depending trip-cam 52 and the u er end of which terminates in a perforaterflhg 53, that overlies the eccentricrod 35. Said rod 35 carries a vertically-pro- `iected bolt 54, that projects through the lug 53 and on its screw-threaded u per end is provided with a-nut 55. 0n tiie bolt 54 are a pair of coiled springs 56 and 57, the former of which is compressed between. the nut 55 and the lug 53 and the latter of which is` compressed between said lug and the eccentric-rod 35. These two springs operating on the governor hold the same in such position that under normal speed the trip-cam 52 will travel such a course that under the movement of said cam downward and toward the left it will engage with a boss 58 on the upper arm of the lock 47, thereby forcing said arm inward and causing the lower arm of said lock to release the pump-piston26. When this release of the pump-piston takes place, the spring 9 becomes operative to uickly close the exhaust-valve and to uickly t row the pump-piston upward, there y delivering the gasolene or explosive liquid into the air-sup y pipe with a dashing action, which great y alds the vaporization thereof. Whenever the s eed of the engine exceeds a predetermined unit, which limit may be varied by adjustments of the nut 55, the weighted arm 50 under downward movement toward the left will so overcome the spring 56 that the trip-cam 52 will be caused to travel (above and c ear of the boss 58 of the upper arm of the lock 47, thereby leaving the pump-piston in a locked and lowered position and the exhaust-valve locked in an ope'n position until the speed of the engine 1s again reduced below the set limit.

The'practicability of the device has been demonstrated in practice. It will of course be understood that the construction illustrated in the drawings is capable of modification Within the scope of my invention as herein set forth and claimed.

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

1. In an explosive-engine, having an exhaust-valve, fuel-oil-supply device, an en# gine-driven lever operatively connected to said exhaust-valve and to said fuei-oilsn ply ,device, and a shifting fulcrum for said eto the exhaust-valve and to an engine-driven part, and a shifting fulcruan for said lever,

normally disconnected therefrom, operated by the engine and arranged to be thrown into action 'on said lever once for each two rotations of the engine crank-shaft, substantially as described.

3. In a four-cycle ex losive-engine, the

l 5combination with an oscl latlng arm, driven from the engine crank-shaft, a ratchetPWheel mounted to rotate at. the pivot of said arm and carrying a plurality of proj ecting-fulcrurnlu s, a paWl carried by said arm for action on sald ratchet-Wheel, and an oscillating lever pivoted at one end to said oscillating arm,

operatively connected at its other Yend to the l exhaust-valve of the engine, and subject, at its intelmediate portion, to said fnern'rnluge, which lugs are brought into action in succession, once for each two rotations of the

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