US857994A - Valve-operating mechanism for internal-combustion engines. - Google Patents

Description

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G. GREEN.

' VALVE OPERATING MECHANISM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JULYQ, 190s.

2SHE3TS-SHEET 1.

No. 857,994. PATENTED JUNE 25, 1907.

' G.GREEN. VALVE OPERATING MECHANISM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JULY 9, 1906.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT ornion.

GUSTAVUS GREEN, OF BEXHILL-ON-SEA, ENGLAND, ASSIGNOR OF ONE- FOURTH TO FRANCIS PELHAM CLINTON HOPE AND ONF-FOURTH TO JOSEPH MILLER, OF BEXHILIrON-SEA,ENGLAND.

VALVE-OPERATING MECHANISM Specification of Letters Patent.

FOR INTERNAL-COMBUSTION ENGINES.

Patented. June 25, 1907.

Original application filed September 15,1905, Serial No. 278,596. Divided and this application filed July 9, 190Ei. Serial No. 325.384.

To all whom it may concern/.

Be it known that I, GUSTAVUS GREEN, enginee'r,'a subject of the King of Great Britain, residing at 49 Reginaldroad, Bexhillon-Sea, in the county of Sussex, England, have invented a new and useful Improved Valve-Operating Mechanism for Internal- Combustion Engines, of which the following is a specification.

This invention has for its object an improved valve operating mechanism especially applicable to the engines of motor oars but also applicable to internal combustion engines such as are used upon motor launches and the like.

It is the object of the invention to provide a simple and efficient form of valve operating gear for use with valves'arranged in the cylinder head. Whenever engines have been constructed with valves in the cylinder .head it has been the usual practice to arrange a cam shaft for operating the valves across the top of the cylinder or cylinders. This arrangement, however, is inconvenient as it tends to make the valve difficult of access While it would be especially inconvenient in cases-where separable water jackets are used on the cylinders. I

According to this invention an arrangement is provided whereby the cams can all be arranged close together on a short shaft conveniently close to the end of the crank shaft, while the tappets which work on the cams are mounted -on telescoping rods having connections to. the valve operating rods.

- The invention is illustrated in the accompanying drawings in which- Figure 1 illustrates in side elevation a fourcylinder engine having the valve operat ng mechanismconstructed in accordance with the invention. Fig. 2 shows an end elevation thereof and Fig. 3 is a plan thereof.

Referring to the drawings it will be seen that there are four cylinders a, each separately mounted on the engine frame or crank casing 12, each of said cylinders having the usual trunk pistons operating on cranks on the crank shaft in the usual manner. The pistons and cranks are not illustrated. but 0 is the crank shaft;

The engine shown is of the type described in the specification of my patent application filed September 15th. 1905 Serial Number 278,596 from which the present application is divided, and some of the letters and numerals marked on the parts of the engine, e. g., the letter 7" on the water jacket and the reference numerals of the circulation pipes correspond with the letters and nn1ner als used in the specification of the United States patent application above mentioned; these parts will not be further referred to in this specification as the invention is not limited to the application of the valve operating mechanism to this particular type of engine, but said mechanism may be applied to any engine having the valves arranged so that they can be operated conveniently by the valve mechanism about to be described.

Each cylinder has admission and exhaust valves arranged at uu in the cylinder head, and all of said valves are operated by plungers d sliding vertically in guides e mounted at the sides of said cylinders near the heads thereof.

{I is a sleeve free to rotate on the shaft g w ich is fixed inthe casing 12 and issuppopted in bracket h, said sleeve being driven atf'half the speed of the crank shaft by suitably-proportioned gear wheels 'i or by any other well nown means for this object. The sleeve f carries all the cams-k for operating the inlet and exhaust valves, i. e. eight cams in this case. The sleeve may also carry the ignition ,be used.-

Two rods Z, Z are carried in bracket bearings m and extend longitudinally of the engine, one at each side thereof. sleeves or'tubes n fitting ortelescoping one within the other. On each side of the engine the sleje'ven of smallest section fits closely around the rod Z and terminates at the right handend (Figs. 1 and 3) in a tappet 0 operating on one of the cams k; at the left hand end this sleeve n carries a lever p connected by a link rod q to the plunger d of the left hand cylinder a. The sleeve n of the next larger cross section works "around the first sleeve, operates the plunger (1 of the next cylinder (1 by a similar link rod g, and terminates at the right hand end with a tappet lever 0 also 190 On these rods are rods g at the required moment. .i All the "sleves n are loo '0 or an convenient'means or the under surjgllfed to bear the sleeves around the rod 1.

l the sleeves arei-igthus separate one froth another and each can be separately rocked byits tapp'et 0 working oir'its cam k and thereby the .plungers d o' rating the' valves can be drawn downby tne action of lever 12 and link freely sup orted on the rods Z so thatsaid nally without disturbing the sleeves. the rods may: be em suitableapparatus.

. an loyed to operate any bio for all-the ihl'et I the cylinders to be independentlyoperated b cams-,arrangedclose together one short f speed sleeve or shaft, and in this ways heater motif/more compact type oi" enginef-oan be me e.

it easy to adjust the operating mechanismfor' each valve with great accuracy, as the lovers p linked,- to the valve operating plungers may be arran ed to' be clamped on the ends of their be] It is convenient to form the heads-d of the piungei swhich operate the valves'in' snch a way that they can be turned to one side whenrequired in order that access can be readily obtained to the-valves or so that'any one or,

more cylinders can be thrown out of' actionwhen re uired for testin the ignition forenam le. heiheadsof t e plun ers can be ed in their working positions y locknuts faces of the heads d may be slightly hollowed out to engage with the to s of the valve spindles during working, while the frictional theqvalve-plungers em- 1 rods can e moved lon 'tudit'will b'eseen thatthe mechanism aboveexplainedjmakes it/ possi j and exhaust valves ofall ow shafts-so that they canibe inde pendently fixed in the best positions for opera-' tion of the valves. "i

' onebffsaid tappets,

-t1ve valves of t resistance to the turning of the heads d is relied upon to prevent said heads from getting out .of position when not engaging with thevalve spindles.

Wh t} claim is 1,5111 an'intern'ah conibustion engine the combinationof .a short lay-shaft, means for driving the lay-shaftfro'm the niain-shaft of the eng'ina-cams u on said lay-shaft, telescoping rotary 'sh a ts of different lengths eao "car said plungers and connections between the plungers"-: and the respective telescoping shafts 2, in internal combustion engine the combination of a shortlay-shaft and cams "uponsaid shaflgmeansfor driving the shaft *from the' engine,"two sets of telescoping arrenged'oneon either side of the engineytappets' each connected to one teleiiigshaftand bearing on one of the cams,

S00 I p 7 i iil'llf'OOIlllGGliiOIlS betweenthe respective tele- 25". The construction above describediriakesscopingsha'fts and the :valves 0 the engine,

whereby the latter sre operated at the proper time s.-

" .3 En lish-internal combustion-engine, the combination of slay-shaft with cams thereon,

l'tappetshesring on said cams, sets of telescoping/shafts, one set at each side of the engine', eac h= of said telescoping shafts carrying means connecting the respective telescoping shafts with the respec e engine, and rods extending through the res shafts, said rods pendently ofisaid shafts.

In- Itestimony, whereof I have-signed my narneitothis specification in 'thepresence of two subscribing witnesses.

v GUSTAVUS GREEN. Witnesses:

Hunmjr A GILL, Lnonenn E. HAYNES? ective sets of telescoping apted to be moved inde-

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