US1868205A - Cross head guide for engines - Google Patents

Description

'- cnoss HEAD GUIDE FOR-ENGINES Filed Sept. 10, 1928 5W2 4 -1 ssv as wgs ' struction;

Patented July 19, 1932 UNITED STATES PATENT OFFICE JAMES w; HIGW, OI POCLTELLO, IDAHO, A SSIEINOR ONE-BALI TO {LIES G.

1mm, 0! scnncranr, NEW YORK oaoss nun 01mm Ion. Home.

Application filed September 10, 1938. Serial No; 804,899.

This invention pertains to cross head guides intended primaril for use in locomotive engines, though capa le of use in engines of other types. a

The invention consists in a novel expansion joint for connectin the guide bars'at one end to a guide yoke or racket of usual form, and

' at the other end to the bolting flanges carried by the c linder head, in the case of locomotives. 11 other types-of en e the usual supports rovided for the guiii bars will be emplo e instead of the guide oke or bracket 11 bolting flanges above re erred to. i The purpose of the expansion joint is to compensate for expansion and contraction of the guide bars, or of other arts with which they may be connected, an thus to revent transfer of stresses from the guide ars to their supports, or from such supports to the guide bars. a

The invention is illustrated in the accompanying drawing, in which:

.Fig. 1 is a side elevation of my improved cross head guide showing the cross head and tlfiesproximate end of the cylinder and steam Fi 2 is a side elevation of the u per ide bar, roken away at its midlengt an sectioned at its ends to show details of con- Fig. 3 is a bottom face view of the upper guide bar; I

b Fig. 4 is a cross section of said upper guide Fig. -5 is a fractional side elevation of the 'cghnder end of the upper guide bar showing ,t e seat or cavit provided for the sliding plate through which the fastening bolts pass; F1g. 6 1s a lower face view of the sliding ends of the guide bar, and if desired, of both guide bars.

In the drawing the numeral 1 designates the engine cylinder, 2 the cylinder head, 3 the bolting flanges projectin fromthe c linder '0 head, 4 the upper bar of t e cross h guide,

5 the lower bar thereof, and 6 the guide yoke or bracket made fast to the engine boiler and serving as the outer end support for the bars 4 and 5. These guide bars 4 and 5 may be of U5 usual construction except for recesses or cavities 7 and 8 formed in one or both ends of the upper bar 4 or of both bars 4 and '5 to receive sliding .plates- 9 and 10, heremafter more fully described. Passing vertically so through the guide bar 4 and symmetrically arr'an ed within recess or cavity 7 are elongated oles or openings 11 to permit passage of bolts 12 (Fig. 1), the width of the openings 11 bein equal to the diameter of the as bolts 12, an the length of said openings being somewhat eater than such diameter, to permit limite play of the bolts therein. Similarly, the cylinder end of guide bar 4 is provided with elongated openin s 13 to permit the passage through them of olts 14. the location of the opemn 13 within the' recess or cavit 8 and the re ative dimensions of bolts 14, being the same as at the opposite end of the guide bar.

Referring to Figs. 2 and 6, the plate 9 is shown of a width and thickness to fit somewhat snugly at its sides or edges within the cavity 7 of guide bar 4, but of sliorter length than said cavity, to permit a limited longitudinal movement or play of said plate 9 within said cavity. ThlS plate 9 is provided with bolt holes 15 of a diameter suflicient to receive but to closely fit, the fastenin bolts plate employed at theguide yoke end of the-12 which pass through them, and s'ai holes upper guide bar; 4 Fig. 1s a plan view of the sliding plate used at the cylinder end of the guide bar.-

It is to be understood that the sliding plate construct on may be used at either or at both are countersunk on the lower face of plate 9 to receive the heads of said bolts.

The bolt holes 15 are so positioned that their centers will register with the centers of the openings 11 of guide bar 4 whenthe ends W of the sliding plate 9 are equally spaced from the ends of the cavity 7, so that in the event of expansion or contraction causing longitudinal movement of the guide bar 4 relatively to the Iide bar 5 there shall be clearance for the olts 12 sutiicient to compensate for such movement in either direction.

The same construction and relation of parts obtains 'as to recess or cavity 8 and plate 10 except that said cavity is in the upper side or face of guide bar 4 and shorter than cavity 7 and is here shown as provided with two elongated holes 13 instead of four. Furthermore, the bolt holes 16 of plate 10 are not shown countersunk, but may be countersunk if this be deemed desirable. However, owing to the relatively short plate illustrated it'is' preferred to omit the countersinks,.and secure the additional strength incident to the thicker metal afforded.

The parts being constructed as aboveset forth, are assembled as shown in Fig. 1, the

- cylinder ends of bars 4 and 5 being secured to the bolting flanges 3 of the cylinder head by the bolts 14 which pass radially outward through the flanges 3, nuts being-applied to the outer ends of said bolts. Similarly, the bolts 12 are passed outward through the bars 4 and 5 and bracket 6, this being desirable in the case of the bracket ends because of the I passage of the cross head 17 over the heads of the bolts, whereas the nuts would, if the bolts were reversed, interfere withsuch passage.

As above mentioned this construction may,

be applied to both the upper and the lower.

bars 4 and 5, though here shown as applied to the'upper one only. .As. this is a'matter of duplication it is not deemed necessary to illustrate the same. i

- Except as herein set forth the structure may follow common practice in the locomotive 'or engine art.

In assembling-the parts the plates 9 and- 10 are positioned in their respective seats 7 and 8, and bolts 12 and 14 are passed radially outward through the respective opening and equipped with retaining nuts as shown Fig. 1. am nuts may be added if deemedr necessary. The bolts 12 and 14 fitting closely within the o nings 15 and 16 of'plates 9 and 10, and ing drawn-homeby the nuts," produce friction between the bottoms of the seats or cavities 7 and 8 and ,the contacting faces of said plates 9 and 10, proportionate to the adjustment of thenuts. This adjustment will be such as to maintain the parts in relatively fixed position so long as no appreciable or material stress is setup. through expansion or contraction tending to move the I guide bars 4. and 591' their supports relativey toone another, but not suflicient to hold said bars against relativemovement in the event that a dangerous stress incident to expansion or contraction occur,such a stress as would be likely, to strainor distort the guide bars or their supports if not relieved.

By the employment of the plates 9 and 10 tive position yet permit automatic adjustment thereof to compensate for any material expansion or contraction.

In some cases cross head guides employ a single guide bar, the cross head being formed with an opening or with flanges to receive or to engage the guide bar and prevent accidental disengagement therefrom. It is to be understood that the present invention is applicable to cross head guides of this type as well as to the two bar type here illustrated.

I claim:

1. An expansion joint for a cross head guide, comprising fixed end supports therefor; a guide bar having a recess in its bearing face and elongated holes passing through said bar within the bounds of said recess; a plate provided with bolt holes perpendicular to its face and spaced to axially aline with the holes in theguide bar, said plate being shorter than the recess in saidbar; and bolts seated in the bolt holes of the plate, passing through said plate, through the elongated openings in the bar, and secured in holes formed in the support, said bolts serving to maintain the plate in fixed position and to hold the plate and bar in close frictional contact, but to permit longitudinal movement of. e the bar relative to the plate to compensate for expansion and contraction of the bar.

2. In combination with across head guide bar and a support therefor, an expansion joint .comprising a plate seated in a recess in a face of said bar and provided with countersunk bolt holes in. its outer face; bolts passing through said holes and having 'theirheads 7 seated in the countersinks in said holes and their stems passinggthroughelongated open-v ings in the V plied to the threaded ends ofthe bolts and serving to produce a variable friction between the contacting and the plate.

guide bar; and 'fastenings ap-" faces of the guide bar,

3. An expansion joint for cross-head comprising a guide bar provided with openings elongated in the direction of the length of said bar; a plate'placed in face --contact with the portion oi the barcontaining said elongated openings and provided with bolt holes spaced to register axially *with the 1 elongated openings of the bar when the plate is positioned symmetricallyewith reference to said openings; a support for said bar; and bolts assing through said support and throu the penings in' the bar and the bolt holes oi the late, and se to draw to ther and 11015 said parts wit friction su cient to maintain them normally in fixed relation but to permit relative movement of the bar and' plate under forces incident to expansion or contraction acting upon said joint.

In testimony whereof I have signed my name to this specification.

JAMES W.

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