US998801A - Valve mechanism. - Google Patents

Description

.i will i rllmll ...in ll wat ornithine VALVE Meenemen.

-anisin for use in interim/l combustion engines; andan object of this invention to provide a valve niechanisi'u in which the de* grec of opening and the dwell in open position of the valve may he varied oy very small amounts; that is, finely adjusted.

Another object of this invention is to pro vide a valve mechanism operated troni the crank-shaft of the engine without the use of a special cam-shaft, the valve-coiitrolling caniv being mounted within the crank-casing.

A further object of iny invention is to provide a Valve mechanism which will prove simple in construction and e'llicient in operation In the drawings illustrating the principle of this inventioi'i and the host inode new hnown to ine oir` :'ipplyingl that principle, Figure l a central vertical section through one of the cylinders ot an engine equipped with iny new vulve ineclninisin., a pertof the cylinder-head being shown in full; and Figs. 2, 3 and 4: are details which illustrate the adjusting mechanism et my new valve mechanismM Referring to Fig. l, in nach cylinder ne et the engine u, is slidahly tilted a piston j which is connect-ed liy a pitn'nin or connectingfod 'c with the crank-shaft g of the engine. Upon the' shaft g is mounted a cainn disl` having; a'nose or cuni-lug 2. Each. cylindr 1 formed with a central Vertical hole-'or p cewhich extends through troni top to bottom of the cylinderhead and in the lower end of which is seated a nozzle g. Theinner end of the latter projects into the recess e formed in the lower face oi the cylinder-head a ne end of the fueldnlet branch-pipe o is inserted' in the outer end of the passage g iorined in the cylinder-head a. in the upper end of the vertical passage e is fitted a plug' fr in which is slidably mounted a needle-valve Specification of Letters Patent.

Patented July 25, 1911.

Application mea mit ie, 191e. serial no. 5673187.

Between the inner end of the plug` r and the top oit the nozzle g is a chamber qgw.ith,

which communicates the inner end of the passage Q". .Tire fuel will obviously be suhjccted to the action of the heat generated by the combustion und absorbed by 'the cyln hitler-head, while it is in the passage g' and the cln'unher y. 'lhe inner end of the needle-vulve fr is seated in its closingv position on the top of the nozzle g and prevents Vthe flow of the tuelroni the passage g and chamber g through the nozzle g. l The outer end of the needle-valve 7" is attached to the .lever a one end oit which is pivotally mounted in the post t fastened to the top of the cylinder-head a und the other or 'free end of which carries a screw-pin s. A coil-spring- 'n is interposed between the lever and the top of the cylinder-head a" and tends to hold the needle-valve 1' firmly upon its seat in the top of the nozzle g The lower end of the screw-pin s bears upon the top oi a slide-rod u the lower end of which is in thel torni of a shoe t formed in its top with a threaded socket 5, whereby the shoe is adapted to be screwed on the slide-rod u. rEhe lower end of the-shoe 4t is loiiiurcated and is ifornied with a centrally-disposed toe i having an edge; that is, the toe is V- shaped. The latterrests upon an arm w which-is pivotally fastened to the enginecasing o at one end and this pivoted arm in turn 'nears upon the outer end of a plungerpin u: which is mounted in a socket zu formed .in :t hess m which projects from the crankcasing y. A coil spring mounted in the socket zr tends to force the plungenpin w outwardly and thereby to press the arm w, shoe t and slide-rod u upwardly, whereby the top of the latter is held in closecontact with 'the screw-pin s on the free end of the lever s.

rllhe inner end of the plunger-pin projects into the crunk-chamber y and the fine adjustment et the position of this inner end is accomplished as follows: A shaft 8 extends transversely of the engine and is supported free to turn in brackets 9. Uponthe shaft 8 is mounted a spiral gear 7 which meshes with a spiral gear 6M keyed upon the slide-rod u. By turning the shaft 8` the slide-rod w will he turned and will be screwed into or out of the socket 5 in the top of its shoe fl, whereby the active length olt the sliderod u will be changed. The spring e is much stronger than the spring toward the peripheral edge of the cam-disk 8. The closer the inner end of the plunger- Em a approaches the latter, the greater Will e the movement of the valve fand the" longer Will that valve dwell in open position,

asivill be readily seen Jrom an inspection oi' Fig. et. rlhe coil-spring e acts to pressvthe top of theslide-rod u against the lower end of the screw-pin s and thereby to prevent any lost motion. lt Will be foundithat, by the arrangement of parte just described, an extremely fine adjustment ofV the degree of opening and the time of dwell in open position ot' the valve r may be obtained. Fnr ther, no special cam-shaft is necessaryy the cam disk 3 is mounted on the crank-shaft g and Within the crank-chamber y and may be made of as large adiameter as the size of the latter Will permit. The cam-nose 2 may be given a long bearing surface and the construction simplified by this arrangement.

I claim l. The combination with a valve;. of a rod connected therewith and adapted to act-uate the same, said rod being provided 'with a shoe havinga socket at one end in ivhich said rod tits rotatively and being bitui'cated at its opposite end; and mechanism for rotating said rod relatively to said shoe.

2.l The combination with a valve; ot' a rod connected therewith and adapted to actuate the same; a pivoted arm; mechanism for swinging the latter; a shoe which engages said pivoted arm; and mechanism for turning saidv rod relatively to said shoe.

' 3. The combination with a valve; of a rod connected therewith and adapted to actuate the same; a pivotcd arm; mechanism esseci for swinging the latter; a shoe which engages said pivoted arm; and mechanism for moving said shoe along said rod, whereby the eii'ective length of said rod between said arm and valve is varied to change the travel of the valve. el. rl`he combination with a valve; of a shaft; a cam-disk mounted thereon; a plunger device adapted to be brought into Contact with said canrdisk; means Ior'gtransmitting the movement of said device to said-valveto open the same; and means t'or varying. the position of said device with respect to said cam-disk.

E5. 'lhe combination with a valve; ofa siaft; a crank-casing in which the latter is mounted; a4 cam-disk mounted on said shaft and Within said crank-casing;l a plunger device which extends through the latter and into close proximity With the edge of said cam-disk; means for transmitting the movement of said device to said valve to open the same; and means for varying the position of said device with respect to said cam-disk.

G. The combination With a valve; of a shaft; a cam-disk mounted thereon'7 a plunger device adapted to be brought into contact with saidcam-disk; a rod provided with a shoe and adapted'to transmit the movement ot said device to said valve to open thesame; and means for varying the active length ot' said rod and thereby changing the position of said device with respect to said cam-disk.

Signed at New York city, N. Y., this litteenth day of June, 1910, in the presence ot the tivo undersigned Witnesses.

^ W'ILLLXM'RABSILBER.

lvYitnesses:

EMMA I. lvloCAn'rr-ir, dunas HAMILTON.

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