US934750A - Valve-gear. - Google Patents

Description

T. OBRIEN.

VALVE GEAR. Y APPLICATION FILED YEBL 1908.

Patented septh 21, 1909.

VALVE GEAR.

y APPLUATION I'ILIJD 1113.24. 190B.

Patented septh 21. 1909.

2 SHEETS-SHEET 2.

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Y myn/ron YZ0/:zas 0 brzefz B Y Mv ATTUHNEYS- THOMAS OBRIEN, F NEW YORK,4 N. Y.

VALVE-Gans.

Specitlcation o! Letters Patent. .Patpntpd Sept. 215 1909,

v Application led February 24, 1908. Serial No. 417,362.

To r/Il whom it may concern:

Be it known that I, Tnoims O'Bimzx, a

citizen of the United States. and e. resident of the city of New York, boron h of the Bronx, in the county and State of .\e\v York,

have invented a new and Improved Valve- Gear, of which the following is a full, clear, and exact description.

My invention relates tol internal eoiiibus- 10 tion engines, my `.fiore particular object heing to provide a valve gear so constructed as to readily permit- 'the removal and replacement of certain valves and their fittings. More particularly stated my invention comprises a construction whereby certain movable valves actuated periodically by :push rods are readily disconnected from the latter and from their housings. and thus removed from the engine and easily replaced within the engine by reversing the steps neef. essarpsy to remove them.

Reference is to he had to th'e aceoinpanying drawings forming a part of this specilieation. in which similar characters if reference indieate eorresponding parts in all the figures. Figure 1 is a Afragmentary plan ol a gas engine equipped ivith my invention, this view showing in full lines the norrna'l position ot' one of the push rods and ot the valve which it controls, ar,... ,n dotted lines showing how the removal of a valve and its littings is readily accomplished, and to this end showing how the push rod is turned out4 of engagement with the valve; Fig. is a vertical seetion upon the. line 2--2 of Fig. l. looking in the direi'tion of the avi-ou, andshoiving one of the pin-:h rods as released from eeitain looking ineehanisin noriiially holding it. the push rod being in this view turned into an abnormal position in order to diseiigage it from the`l valve; Fig. 3 an enlarged cross section-upon the. lines Il Vl-T of Figs. 1' and 2. looking in the dirention of the ari-mrs. and .shoving hoiv the keys extend through .slots in thi push rods, iherehy preventing he hitter fri-ni tfrning under ordinary conditions to pr-vent their partial rotation upon removal ot' the. keys, thisI view showing one form of spring loi-lv pose of rai tions; and Fig. i is a fragiz'ientari side eh'- vatnnr showing a slightly modifie-fl forni ot' g looking device for holding thekeys in their normal positions, the view showing other g nnoriiial position.

wise substantially the sanie'pai'ts as indicated iii Fig. 2l.

Mounted upon anengine frame is a cylinder 6 provided with ribs 7 for the puriating heat in the usual manner. touneeted with the cylinder (i is a chest 8 provii'led with passages 9, 10, separated by :i partition 4l1. .\t 12 are openings merging into the passages E). 10. A valve easing is shown at 13 and is provided with a portion 13* fitting into one of the openings 12. The valve easing 13 is provided with a portion 14 serving as an inlet pipe.

Another valve casing is indicated by dotted lines at. 15 and is provided with a portion 16 serving as an outlet pipe. Valve stems 17, 18 extend into the 'casing's 13, 15, the latter being provided with necks 19, 20. foi' this purpose. The valves 17 and 18 are rovided with valve members 21, 22. whioli move relatively to theehest- 8 so as to open and close the openings 12. A spiral spi-ing 17 eneireles the valve stem 17 and the neek 19. and a similar spiral spring 17t ent'ii'eles the stem 1S and neck 20. 'Fliese spiral springs abut a't their .smaller ends against eollars 23, 24 secured. in positionhy nuts 25. :26, the latter being heldin position hy'tfuslzion nuts Q". 28, which also serve the purpose ot' holdin, r the nuts 2li firmly in position.

Mounted upon a framework 2t) is a plate 3() provided ivith a bearing 31 iii which is joiiriialed a revohihle shaft 32. This shaft is provided with vains 33. 33. staggered relatively to eat-h other. Tubular easings'iil. 35, 36, 3T are fashioned as hearings and mounted ivithin them are push rods 38, 39;

40. 41. The iush rods are adapted to turn and also lto slide longitudinally within thestl bearings. The push rods 3P.. 39. 4U, 41 are severall)v provided with rollers 42 adapted to he engaged in. the earns 2l.' 33 for the purpose ol' avtizatiiig tupush rods with a minimum m trietioii. The caros mei-elf.' press the push rods away. the aetion of the springs l. lil being relied upon to retraet them atti-r eat-h minst-d movement bj.' the rams. l'ai-h roller '"3 ioiii'asiiei't Nithin a slot 42., 'l'he push rods. 3?* ifi. ll are' for holding the keys in their normal posi- 1 provided with presser ila-t ich 1. li. ti'grai therewith and gage the vushion nots .tti iri- .so arranged as to eniiliori the parts are 'l'lie push rods are-provinwl 'with slots 47,

l screw lposition, therefore, the action of the engine .57 (or 57) and, the shaft 32 being rotate g 48, 49. 50 disposed diametrically, as will be 2 understood from Fig. 2. Keys 51, 52, 53, 54 l extend through the - slots 47, 48,' 4Q. 50 and l are removable. When these keys are in iol siton, the resser feet extend houitihtally, but when t e keys are removed, the presser feetmay be turned vertically, as will be unt dex-stood from Fig. 1. Lugs 55, 56 (sce Fig. 2) support the keys in such position that the latter may be readily grasped and removed. Leaf s rings 57 are revolubly mounted upon lts 5B and are provided with upf turned ends 59.. By grasping these ends the springs 57 may be turned. Normally the,

springs ress upon the keys, but u )on being turned t iis pressure is released an the keys are uncovered. In the form shown in Fig. 4the push rods 38, 41'* are encircled by casings 34. 36, serving as bearings., and keys 56 extend I through the ush rods, substantially as above described) with reference to the other views. In this instance, however, the leaf spring 57' having uptumed ends 59 is not pressed upon directly by the bolt 58", a s iral spring 60 being disposed intermediate t icsehparts. By `burnin the screw bolt a8" when the parts are first p aced in position, the s iral spring G0 presses upon the leaf spring, gi. The spring 57 or 57* is held in position transversely of the casings 34, 35, 36 I and 37 by lugs 61 (see Fig. l). v l- The operation of my device is as follows: The keys 51, 52,153, 54 bein in position and held fixedly by pressure o the leaf sprin the cams 33, 33a press against the rollers 42, thereby causing the push rods 38, 39, 40, 41 to travel each in the longitudinal direction of its own axis so as to actuate this partielllar valve. When the parts are in normal 1s not greatly different from what it has been heretofore. Suppose, now, that the operator desires to remove the valve casing 13, together with all parts accompanying it. l

He turns'the spring 57 into the position ini4 dicated at the center in Fig. 1 and removes the two keys previously held down by this s ring. This leaves the presser feet 44, 46 ree to turn, and the operator, by turning! either of them, can disengage it from its valve mechanism. Then by taking hold of the valve casin 13 (or l5) he can remove the vrtve toget ier with its appurtenances.

To replace these parts he merely places thc casing back in position, turns the presser i action differs slightly from that )ust described. In this instance thespiral spring 60 normally presses the spring 57* into its fixed position, and when the spring 57* is lifted slightly, in order to turn 1t, the spiral spring (S0 is compressed.

ried by tlie push rods are brought into and out of proper working relation to the cam by merelv turning the push rods upon their respective axes.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

The combination of a cam, a roller disosed adjacent to said cam and adapted to e engaor d thereby, a push rod rovided with a s ot and supporting said rallier being disposed adjacent to said cam and supporting 'said push rod so that the latter may turn upon an axis extendin in the general direction of the length o said push rod, said feller being adapted to turn u crossing the neral direction o the axis of said push i' the rotation of said push rod bringing said roller into and out of proper working relation to said cam, a casing provided with a tubular portion encircling said push rodl and 'further provided with a keyway adapted to register with said slot 1n said push rod, a key for extending through said key-way and through said slot, and spring mechanism for normally holding said key in saidkey-way and said slot.

In testimony whereof-I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS OBRIEN. \Vitnesses: I l

WAL'roN HARRISON, EvnRAnn B. Manslnm..

n an avisA In each form of mydevice the rollers car-

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