US980820A - Valve-gear. - Google Patents

Description

M. M. & J. MUL-VHLL & J. P. & M. L. ROONEY.

'VALVE GEAR.

APPLICATION FILED MAY 12, 1910 Patented J an. 3, 1911.

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M. M. & D. J. MULVIHILL ,& J. P. & M. L. ROONEY.

VALVE GEAR.

APPLICATION FILED MAY 12, 1910.

l Patentad Jan. 3, 1911.

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@wi/Mmmm M. M. & D. J. MULVIHILL `z J. P. & L. ROGNEY. VALVE GEAR.

APPLIOTION FILED MAY 12, 1910.

980,820. Patented m1131911.

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MAURICE M. MULVII-IILL, DAVID J. MULVIHILL, JOI-IN P. ROONEY, AND MICHAEL L.

ROONEY, OEl RENQVO, PENNSYLVANIA. L A- VALVE-GEAR.'

Specification of LettersPatnt.

' To all whom 'it maiz/concern' Cil Be it known that we, MAURICE M. MULvi HILL,DAV1D J. MULVIHILL'JOHN P R'ooN'EY, and MICHAEL L.'V Rooney, citizens ofthe United States, residing at Renovo, in the county of Glintonl'and State of Pennsyl va-nia, have invented certain new'andluseful Improvements 1n Yalv'e-Grears,l of which" the following 1s' a specification.

The invention relates to improvements in valve gears. A

The object of tliepresent invent-ion is vto simplify and improve the construct-ion of valve gears for locomotives and other engines, and to provide an inexpensive vand efficient outside valve gear, which may be readily applied at a very small cost to any locomotive, and which when .assembled w-ill be in full view and easily accessible.

A further object of the invention is to provide a valve gear, adapted to be operated without lap or lead, whereby whenV the reversing lever is in .a lcentral position, the valve will be absolutely stationary, thereby preventing the bad effects resulting lfrom the movement of. valves having lap and lead when the steam -is out ott and a locomotive is drifting. 4 of the invention is to dis-z Another object pense ywith cross head connections, and to enable the valve gear to be actuated directly by the inain rod, and tolproduce an early admission of steam and a late cut ott, so that steam will be admitted to the cylinder full ninety per cent. of the stroke, whereby the power of an engine will be materially f increased.

Vany'of the advantages of the invention. Y

In the 'drawingsz-Figure 1 1s a side ele-` vation, partly in section, of a valve gear,

constructed in accordance with this invention and shown applied to a portion of a locomotive. Fig.4 2 is a plan view of the same. Fig,3' is an enlarged side elevation of the valvejgear, partly in section. Fig. 4

Vis aftra'nsverse sectional view on the lineA lf-4 of Fig. 1; Fig 5 is ay sectional view' o'n 'the line 5--5 of Fig. 3. Fig. (i is affreus- "ve'rse sectional view on vthe line (3 6 o'f'Fig. `3. Figa? is a similar view on the line 7-7 of Fig. 3. Fig. 8 isv a detail sectional vieu-vk ontlie line 8-8 of `Fig. 3. 'l

Like numerals of reference designate cor- Y 'responding parts in all the figures of the drawings.

In the embodiment ofthe .invention illus trated inthe accompanying drawings, 1 desc Patented Jan. 3,

ignates a 4main rodoLf a locomotive, connected at its rear'end to the crank pin 2 and at its front endwith the cross head?) of 'a pis` t0n rod 4. The cross head `3 operates in ySuitable guides 5, and the main rod-is provided With a longitudinal guideway, preferably formed by the usual longitudinal groove 6 and a ypair of plates 7, bolted or otherwise secured to the outer face of themain rod above and below the 'groove .6, and extending 4 inwardly over ythe same toform projecting flanges for retain-ingaJ slide block 8 in the groove of thev main rod. The slide block 8, ywhich carries a' pivot 9, is provided with upper and lower-'grooves 10 to rece'iv'ethe pivot 9, vwhich has an intermediate tapered lbearing `portion 11', is provided at its inner end with a head-12, which is countersunk in the inner ac'eof the slide block. The'bear ing portion 11 is tapered outwardly and fitsv ina tapering opening 13fof an upright link 14, secured on the pivot 9 bv a nut v15,-

'which alsov retains a'substantially horizontal link 16 on a vcylindrical bearing portion 1T of the pivot 9. The outer end of the pivot is threaded and the cylindrical bearing portion is located between the threaded portion l and the tapered bearing portion, as clearly. illustrated in Figs. 7 and 8 of the drawings.

The link 14 extends upwardly from, the main rod 1 to a' centrally arranged arm'18 of a reverse link 19, and the upper portion 20 of the upright lin-k is .preferably forked. vas shown in Fig. 4 to straddle the central arm of the reverse link 19. The approxi: mately horizontallink 16 is angularly bent toToH-set its front end from the plane of the rear end to enable its frontend to be pivotedby a bolt 21v toanear 22, extending `fromthe g1 ide yoke 23, which connects the rear ends Aoft? the cross head guides. The link 16 may, f?? course, beV pivoted lto any other vprojecting `-portions of the plates 7. Thev "of spaced supports 26, preferably consisting of arms or portions formed Aintegral with and extending upward from the yoke 23, to which the link 16 is pivoted. The pivots 24:` are preferably formed integral with approximately L-shaped plates or arms 2T, which are bolted to the reverse link at the central portion thereof adjacent to the inner end of the central-arm 18. The reverse link receives a slidable link block 28, which is pivoted to the rear end of a forwardly extending radius rod 29 by a bolt 30, or other suitable fastening device. The

reverselink, the slide block and the radius yrod constitute reverse mechanism similar to that employed in the `VValschaert valve ear, and the front end of the radius rod is pivoted by a bolt 31 to the slide 32 of the valve stem 33, and itis connected atan intermediate point by a lifting link 34 with a lifting arm 35 of a reversing shaft 36. The reversing shaft has an upwardly extending arm 37,-which is connected by a reach rod 38 with the reversing lever (not shown) The mechanism for operating the radius rod to move the same to opposite sides of the pivot of the y reverse link to reverse the engine and at intermediate points. to vary the cut-oif is of the ordinary construction, and it may be modified to suit the'locomotive or engine to which the valve gear is applied.

The valve rod 33 is connected l.with a slide valve 39, which is an ordinary D valve or outside admission valve, but the valve gear is equally applicable to an'inside admission or piston valve and may be employed with equal facility on engines having .either type of valve.

When the main rod is reciprocated, the

. link lll will be moved upward and down,-

ward and the reverse link will beoscillate'd and will communicate its motion to the valve 39 through the radius rod .and the valve rod. This 'movement gives an early admission and a late cut-olf. ln Fig. 3 of the drawings, the full lines show the cross head 3 and piston l() traveling in the di .is not aii'ected. by the angularitv of the ecremains subs'tahn centric rod. The valve is closed by the' ltravel of theV piston from the dotted line position, shown in F ig. 3, to the right hand end of the stroke. The valve is adapted to operate without lap or lead and, therefore, has no motion when the reversing lever is in a central position. Also this obviates the necessity of employing a combined lever,

or other cross head connection for produc-v ing suilicient valve travel to secure ap and lead. The valve gear is an outside `gear and is located above the main vrod and the cross head guides and is in full view and easily accessible. v

Having thus fully described our invention, what We claim as new and desire to secure by Letters Patent, is

The combination of a main rod having a longitudinal guide-way, a centrally pivoted reverse link located above the plane of the main rod and having a centrally arranged arm, a radius rod connected with the reverse link, means for connecting the radius rod with a valve, an upright link pivotally connected at its upper end with the central arm of the reverse link, and an oscillatory link having a fixed pivot at one end and pivotally connected at its other end to the upright link and anranged at an `angle to the same, said upright link being actuated by the main rod and slidably connectedwith the guideway thereof at a the oscillatory link.

In testimony whereof We affix our signatures in presence of two witnesses.

MAURICE M. MULVIHILL. -DAVID J. MULVIHILL.

JOHN P. RONEY. MICHAEL L. ROONEY.

.l/Vitnesses MICHAEL RUSSELL, GHAs. F. OsNER.

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