US1135528A - Coupling-knuckle reinforcement. - Google Patents

Description

.IANNEY @L E. P. KINNE yRAL COUPUNG KNUCKL REINFORCENIENT.

"MF'UCATION l'? DCT. 25, 1912.

Patented Apr. 13, 1915.

2 SHEETS-SHBET 24 knuc le reinforcement.

PMTION 0F NEW lIEHSEY.

Specification of Letters Pe tentt lizillented Agn i3, 'i

To uZZ who-m it may concern Be it known that We, ROBERT E. L JAN-- New, of (lineage, in the enunty of Cool: .ind tete of Illinois, and EDMUND P. K1N Nr., of Alliance, in the county et Stark and State of Ohio, citizens of the United States, have invented certain new und useful improve ments in CouplerKnuclile ,Reinfomeinentse of Ywhich the following n speciiieetion.

Ouv. invention relates tu cer couplers zin/.l has articular reference to a nevel coupler The invention more particularly relates to an improvement whereby ineens are previded for reinforcing the usual wearing sur-- faces and relievin the knuckle pivot pin. under pulling und ulmg stresses.

Some of tno objects sought and attained by the present construction are as follows: 1st: Increased strength and length of useful life of car/couplers constructed in inmoralanee with our invention under pullingr and hufling stresses. 2nd.: Increased" strength el the knuckle in a line passing transversely through the center of the pivot pin hole. 3rd: Increase in effective strength mul stillness et the knuckle pivot pin by :relieving it of e pertion of the pulling and bulliinr stresses and yconsequent decrease in the amount Gif 'weer o the piu and the pivot-pin holes beth in the knuckle and in the lugs :if the coupler head. 4th: increase in tomi aren of surfaces un the knuvlfle und heini in Contact during buiiing stresses inni by snuli increase to obtain il greater (listi'iliutieu o( stresses and refluctin ot distoi'tien, M: The construction of certain oi" the reinoreing surfaces in such manner that when the knuckle is opene the surfaces will not lie in Contact and will therefore @iler nu tesis-1f ance to the swinging of theulinuekln. l und further objects are :iltuineil in :i struction such ns shown in'the aufeminin ing drawings, wherein,

n Figure l is u plan View of :i knuckle cnnstrueted in accordance with our invention; Fig. 2 is n plan View of u coupler lug ranged to intel-lit with the knuckley shown in Figw l; Fig. 3 is a plan 'iew of a (simplen: coupler havin our improvements applied thereto, and, ig. 4 is zi side elevation, piubtially broken away, showing the coupler anzi knuckle intertted.

of the (mnu nays er hul; :is uullineil n ille givol, pin www #guai lo tlm Pullis@ 1 fr xiii mm1-s mini@ that line A A is normal to surface o of lug L, and that the Width of lug L along this line is considerable, offering a high resista' ce to shearing during pulling stresses.

By refer-rin to Figs. 1 and it will therefore be seen tiat stresses in the direction ot' line A, A, will be resisted by surfaces u being in contact, and that such stresses will be taken up and distributed by the metal oi' the ears, thus relieving the knuckle pivot pin of the stresses tending to bend it in the direction of A, A', and rendering the cou` pier inoperative. Similarly, by referring to Figs. l and 2, it will be seen that stresses in the direction of line B, B', will be resisted by surfaces e, being in contact. and the sur faces e, are normal to the direction of line of force B, B, and consequently are in the most eifective position; also that a dimension ol' lug L is very considerable measured along the line of force B, B", Therefore the lug L is particularly Well adapted to resist the stresses along this line, and such stresses will be taken up and distributed through the metal of the coupler head, thus relieving the knuckle pivot pin of the stresses tending to bend it 1n the direction of l B. and renderin the coupler inoperative.

Buihng stresses are further alrsorbcd by surfaces and e, of lugr L of knuckle conr ing in contact with similar surfaces oi coupler head, and by this added arca ot contact to reduce the rapidity of wear and conseA quent amount of distortion from the designed lines. The stresses are further taken up by selecting suchv a. radius d, greatly in excess of the normal radius j, (shown in dotted, lines in Fig. l) to describe are c. Normal radius j, to generate an arc describing the boundary of thc hub oi the knuckle is of the same length as distance from center of pivot pin hole O, to point f/ on contour, but radius (l, as will ne seen, is considerably greater than radius j, consequently the extent of surface Z, and the strength of lug L on the line B, B, also the strength on line and direction A., A', is greatly increased.

lTransverse strength is gained by adding lug L to the top and bottom hub surfaces {indicatec at J. Fig. 4.), of the knuckle so that the vertical distance (see Fig. 4) mer sz id lug is increased by the total width of the lugs L. Therefore the strength of the knuckle under pulling stresses through a section Y. Y is greatly increased lt has been slal vr. that in service coupler knuckles br ak very irciniently through this section Y, Yf. and this increased strength will very greatly reduce the failures of car couplers from this cause.

Surfaces a of knuckle and head. coming in contact during pulling stresses, offer an additional bearing and wearing area which serve to further distribute the stresses and to thus maintain the designed contour lines and consequently the useful life for a greater period.

Surfaces f of knuckle and coupler head. coming into contact at the extreme limit. ot the outward or opening movement of the knuckle, otl'er additional striking and bearing area to stop or limit thc opening ot the knuckle. The blow produced by the knuckle striking its stops in opening outward is thus absorbed and distributed through an irrcreased area of surfaces, and thus further insures that the knucklel will not open to a point beyond that desired.

ty constructing the knuckle and coupler head so that arc a is eccentric with the pivot pin hole, the knuckle will swing away from and clear of arc a. of the coupler head during the opening movement and there will be no interference of their surfaces to retard the opening or closing oi the knuckle.

Surface (i, heretofore referred to. assists not only in absorbing shocks duc to hailing but overcomes the tendency of the knuckle to niovc away from the-guard arm under pulling stresses. This explained because of the tendency of the knuckle to rotate around its extreme inner end. which we have marked G. Under pulling :stress and with a loose pin, the resultant `force in the line A', will force the ,surfaces (l into contact thus relieving the pin from all strain. lli der builing conditions. ol' course the. fanfares (l will act to absorb a portion ot the stresfws because of the tendency of the knuckle to rotate on the surface s a 'further protection against distortion due to bufling stress we have prox idr-d the flanges M, extending above and below the hub of the knuckle. these flanges being' intended to contact the lug ol' the coupler when the knuckle is closed. Preferably. the inner surfaces of these lugs are struck from a point eccentric to the pivot pin hole.- in order that they may contact the coupler lugs closely when the knuckle in closed position and be free when swung outwardly.

le claim: i

1. In a car coupler, the combination of a head having lugs, and a knuckle provided with reinforcements extending above and below the hub thereof, said reinforcements consisting of integral lugs, an outer bound ary line c of which x.is located outside of the normal hub contour and a radial boundary' line of which is located outside of a lungi tudinal line/,passed through the pivotal airis of the knuckle, substantially as described.

Q. In a car coupler, the combination oi a head having ears provided with recesses, a knuckl'e interitting,r with said head and having lugs adapted to eoperate with. the reeesses in said ears, said lugs cxtendin i and below the knuckle hub and provi substantial mass of metal outside the non mal hub diameterl which .is` intersected by' of the coupler lili? ilnes indicating the resultants of forces applied in pulling or buiing, substantially as described. v

3. In a car coupler, the combination of a head having ears provided with recesses, a knuckle, substantially arc-shaped lugs on said knuckle abovev and below the hub thereof, said lugs coperating with the recesses in said ears, the arcuate extremities of said lugs forming stops, land being limited by radial lines extending from a point substantially coincident with the pivot pin center, the arc extending over more than 90 of the hub circumference, substantially as described.

.4. In a car coupler, the combination of a head having ears provided with recesses, a knuckle interfitting with said head, lugs in said knuckle extending above and below the knuckle hub and adapted to coperate with the Arecesses in said ears, said lugs providing a substantial mass of metal outside of the normal hub diameter, said mass of metal being so located as to be intersected by lines passing through the pivot pin opening at an angle of @and C respectively from the longitudinal center line ofthe coupler, substantially as described. 1

' 5. In a car coupler, the combination of a head having ears provided with recesses,

-.said recesses forming abutments of substan- "j'tial area, a knuckle provided with integral reinforcing lugs 'above and below the hub thereof, said lugs including a mass of metal outside the normalfhub diameter, the bounding edges of said lugs being fixed by radial y lines'extending from the axis of the knuckle pivot and constituting stops of substantial area, said: stops being adapted to contact said abutments epd relieve the knuckle 'loW the hub thereof, the outline ofthe outer portion of said lugs being formed partl from a radiusl substantially coincident Wit the pivot pin center and partly by a straight line tangent to said curved line, and the inner surface of said lugs being curved on a radius eccentric to the pivot pin center, substantially as described.

8. In a car coupler, the combination of a head having ears provided with recesses,'

and a knuckle having an arcuate surfaced` -andy a substantially plane surface G .co-

operating with correspondingly shaped stops o n the coupler head whereby to re? move strain from the pivot pin by counteracting the tendency of the knuckle-to rotate about a point at or near the locking face of `the knuckle, substantially as described.

ROBERT E. L. J ANNEY. EDMUND P. KINNE. llfitnesses to signature of R. E. L. J anney:

J. F. CRAMER, F. H. RoHLEs. Witnesses to signature of E. P. Kinne:

LAUNA CARLISLE, CLYDE CorrMANi x

Images