US337072A - Expansible gqnnectiniq-pln - Google Patents

Description

'(No Model.) H. M. MONTGOMERY.

EXPANSIBLE GONNEUTING PIN.

No. 337,072. v ?atented Mar. 2,1886}.

" witw-coo as (gm DQ14 606 I 5331 Z1! @Ho nmafMQ livsnssis seer Units *rnfrss l n'rnnr illrnlcni HARRY M, MONTGOMERY, OF BOSTGN, MASSAGHUSETTh.

EXFANSiELE JiENNECTlNG FihiV srncirrcnrron olefin-goes 6531mm Patent No. 331072. dete'd'N'arch a, wee.

Application filed November 17, 1885. Serial No. 183,146. (No model-l To all whom it may concern.-

Be it known that I, HARRY M. Mou'rooti- ERY, a citizen of the United States, residing at Boston, in, the county of Suffolk and State of Massachusetts, have invented. certain new and useful Improvements in Expansible Connecting-Pius; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it cppertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

The nature and object of my invention will he more readily understood upon consideration of some of the difficulties which it is in tended to obviate.

irriocomotiv'e' 'zizid'stati'onary'steain engi nes it is extremely important that the correct distance from the center of the cross-head pin to the center of the crank-pinshould be main-- toined at all timesunchanged. Any alteration of this distance after the engine has been knocking out one of the cylinder-heads.

The usual mode of construction is to make the crank-pin and the crosshead pin solid, end to provide each end of the connectingrod with-blesses, strap, and keys to enable all wear of the pins or of the crosses to be taken up. In setting up the keys for this purpose the effective length of the connecting-rod is liable to be changed-a circumstance which necessitutescnrei'ul and tedious adjustment and readjustment of the hrusses and :eys in order to preserve the correct distunce between crank-pin and cross-heed pin. l urtherniore, the keys in the crosshend end of the connecting-rod are usually dil'licult of access, being situated in the confined space between the walls of the cross-head. This renders their accurate adjustment a matter of much time and trouble. The same difficulties are experienced in direct acting engines wherein the connecting'rod is pivoted directly to the piston, in some kinds of pumps, and in fact may be said to exist in alheases where n connecting-rod is used to transmit motion and force.

My invention is intended to obviate these annoyances and to enable the construction of connecting-rods to be simplified.

To this end my invention consists of an expansible pin which maybe used for connecting together moving parts of machinery oi any kind, but. is especially adapted for uniting; connecting-rods or pitinen to their coacting parts. to be dispensed with, since in lieu of theni'the- COIlHGClJlHg'TOdmHY117N 63 a solid end with e holelv drilled through it to receive the expansihle pin. When the bearing wears loose, the pin is expanded until a close fitis again obtained. As the expansion is substantially radial the eil'ect-ive length of the connecting-rod remains the sense.

Referring now to the drawings forming it part of this specification, Figure 1 represents the usual construction of the moving parts of astenn'i-engine, the cross-head being broken away to show the end of the connecting-rod. Fig. 2 is e crosssectionel view of thecrosshead, taken through the connecting-pin, Fig. 3 is a longitudinal sectional view of my inn proved expunsihle connecting-pin. .Fig, i is e crossscci-iennl View of the same on line :s y, Fig. 3. Fig. 5 is a perspective view of the cxpansible sleeve. Fig. l is a similar vicw of the expending-wedge.

The same letter of reference is used to 5.63- igniite like parts in all the figures.

A A represent plates or lugs, which us supports for the connecting-pin. Through these plates are drilled holes a a. Between these plntcs'is snugly fitted the hollow pin or sleeve 13, which is separate fronrand independentof said plates, merely shutting against .lllOlll at each end without entering them. This It enables expensive brasses and keys v sleeve is supported solely by the wedge C,

hercinnl'tcr described, and is received within the hearing in n connecting-rod or the like. The sleeve is split from end to end on one side, as shown at K. it is cylindrical on its outer its length the central hole is tapering; fitted into is the locking" center pinpll;

surface and its innersurface is of such a conJ formation as to enable the-sleeve to be expandedby suitable devices. For instance, it may, taper gradually from both ends t'o "eoact with-tapering plugs inserted into 'it.,' I- pre-' fer, however, the construction"' shown ,in" the drawings, in which one or more cylindrical portions, b I), alternate with oneor more'frnstoeonical portions, of If] The, number of these frusto-conic'al portions may be varied, as desired,.:an d their pitch orslant-can be made so sharp that a moderatelongitudinal nioveme'ntpfthe wedge will effect a consider; able expansionof the sleeved For the'pnrpose of expanding the sleeve 13, I prefer to-fuse a wedge, G, passing centrally through the same.

and at the smaller end isja similar cylindrical portion fitting the hole a. Thisconstrnction' enables the wedge to.'be' moved lengthwise; without destroying its lit in the holes a' a, Between these two cylindrical portionstl'ie wedge C correspcnds in-shapewith the inte' rior of the sleeve B. Thewedgeisprovided with means for adjusting it longitudinally; ,I have shown its smaller end extending Beyond; the plate A, and screw-threaded n'ut',G and lockout G enable it to be-suitably. adjusted, A washer, F, is interposed between unit G and plate A. t J

I also provide means for lockingthe'wedge C to the plates A A when properly'adj usted. A hole is drilled through its center from end to end,and it is also split iengthwise along one side, as shown. For a greater portion of and This center pin has suitable means for tight" ening it-such as the nut II and lock-nut H i screwed upon its end and bearing against the end of wedge C. The ciiect of tightening the nuts H H is to expand the wedgeC and cause the cylindrical portions at each end of it to become firmly fixed in the holes a a. A spline or key, E, is driven into grooves cut in the plates A A, the sleeve B, and the wedge C to secure these parts in their relative positions, and to resist their tendency to rotate about the axis of the center pin, D, when in active service.

The operation of my device is as follows: W hen it is desired to expand the connectingpiu, the nuts H H are slackcd up, which loosens theccnterpin, D, and allows thewedgc C to contract slightly, so as to rest loosely in the holes a a. Upon turning up the nuts G 1' the wedge O is moved lengthwise, expand in; the slcevcB. NVhenthc required degree of expansion has been reached, the nuts H. H are tightened, causing the center pin, D, tocx' pand the wedge and lock it firmly in place in the plates A A. The several parts are thus iicld compactly and rigidly, forming a strong solid bearing for the connecting-rod. A: the sleeve 13 is capable of increased ex I ain aware that a, solid conical pin has At its 'larger end is acylindrical portion fittingthe holeaiuplute A, I

care by Letters Patent, is- 8";

"the drawings; but I may, modify them somewhat within the scope o'f'myinveution, Thus, for instance, it may sometimes be advisable to make the sleeve B or the wedgeO, or both, in morethan one section. So also slots and ,keys mayiakfetheplaceof the adjusting-nuts. Only one supporting-plate vmay be used instead of two.

f 80 been I used for theYpu'rpOSef taking up the v 5 ,wear in connecting-4nd.brasses, and such I 'do not claim, I

- What I do claim as newyand desire to se- The con binatiom'w'ith a; connecting-rod [and its'coacting 'pajrt, oi' an'expansible pin for joining'the'm togethenfconsisting of a separate and'itidpendent split Sleeve received solely within the member which sustains the ,wear, ulldjIlQdilS for expanding saidsleeve to fcompensate i it 'the'wear, substantially as: and ,for

the purpose set. forth.

.. a An egtpansible connecting-pin, consisting of lthe 'separate' and independent .split 9;

sl eve- 13 m combinatioirw ith thewedge O and means for adjusting the same-,said 'sleeve being supported solely-by said wedgesand capableflof" ncreased, expansion from time t0: time.to'cr the in-pose dl tuhingup wear,'sub-j 0" staniiialiy asshown and described. L, 4 i

T 3. The combination,-;with a supporting plate, of an cxpan'sibleconucctiugpi.n con-, sisting of an enpausibl'e sleeve, B, abutting 'ainst but not entering said plate; ,in' c inbi-p 105 ;n tion'witli suitable means for expanding it, substantially as and for the purpose set forth.-

ii' il e combination, ,with' a, supporting; plate, of an expansible connecting-pin toong sisting of the pin. sleeve B,-abutting.against l i out not entering/said plate, in combination with the wedge O andfmcans for adjusting said wedge, substantially as andii'o'r the par pose set forth.

5. The combination, with a supporting i s plate, of an expansible sleeve, 13, and an adjustahle wedge, 0, having one or more irustoconical portions, Iib, sulrsantiallyas and for the purpose set forth.

6. The combination, with a supporting- 2 plate having an opening therein, of an we pansiblc sleeve, ii, abutting against but not entering said plate,and an adjustable wedge,

0, having a cylindrical end portion fitting the opening in said plate, substantially as and for 5 the purpose set forth.

7. The combination, with a supportingplatc, of an expansiblc sleeve, B, an adjust able wedge, ('7, and means for locking said wedge to the supporting-plaie, substantially 3 as and for the purpose set forth.

8. The combination, with the plates A A of the split sleeve B, the split hollow wedge In testimonywhereof Ialfix my signature in 10 G; the tapering center pin,D, and means for presence of two Witnesses. adjusting said wedge and said pin,substantially as and for the purpose set forth.

9. The combination, with plates A A, of l the split sleeve B, the split hollow adjustable i Witnesses: wedge G, the adjustable tapering center pin, R. S. MOODY,

HARRY Ml MONTQOHERY.

D, and the key E, substantially as and for the l l J AS. P. MANNING. purpose set forth. I

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