US1120060A - Contour for couplings. - Google Patents

Description

E. P. KINNE & H. BLANGHARD.

CONTOUR FOR COUPLINGS.

APPLICATION FILED AUG. 26, 1912.

Patented Dec. 8, 1914.

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wrmdel m 7711/9/210/1) Kiwi/fa /7/L/@ E. P. KINNE & H. BLANOHARD.

CONTOUR FOR COUPLINGS. APPLICATION TILED AUG. 26.1912.

fatented Dec. 8,1914.

3 SHEETS-SHEET 2.

E. P. KINNE & H. BLANGHARD. CONTOUR FOR COUPLINGS. APPLICATION FILED AUG. 26.1912.

1,120,060. Patented Dec. 8,1914.

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r UNITED" "STATESEPATENTOFFICE EDMUND P. KINNE'ANDHENRY fiANcHAm'), OF-ALLIANCE, 01110, assIGNoRs 'ro AMERICAN STEEL FOUNDRIES, or NEW YO K, N. Y, a conrom'rrou or NEW JERSEY.

conrroua FOR cocrLrNGs.

Specification of Letters Patent. Dec, 8 1914,

Application filed August 26, 1912. Serial No. 716,994.

To whom it concern:

Beit'known thatwe, :EDMQND P. Kmim and HENRY. BLANCHARD, citizens of the United States, residing at Alliance," in the county of Stark and statefzof Ohio, have invented certain newland useful'Improvements in New Contour for Couplers, of which the following is a specification.

Our'invention relates to that class of car couplers knownas the M. (LB. typewhich employ a pivoted knuckle, a'lockther'efor and a lifter for operating the lock; and more particularly relates tojan improvement in the form) of the outline orcontour andthe location. of; thehook or knuckle pivot pin center in relation thereto,

.The principal objects gained by proved contour are as follows: First: increase of strength, U to 41%"over couplers. constructed with the M. C. 13,. standardi'contour jlines) through those sections' defifned by'a straight line pa'ssing transversely-through; the knuckle piv'ot pin cen'ten; Experience has shown that av large portion of the failure of -:carcouplers; has been due to'fracturethrough the lugs or cars of the-coupler head and through the pivot pin hole of-the'lmuckle.

Second: increase of strength-j of wall' through'that portion of head known as the face of the'coupler. Experience has also shown'that a largeproportion of the car coupler failures hasfbeen due to fracture of thernetal at this location. i

Third: greater ease in coupling, either on a straight track with couplers off of center line of cars or while cars are on short curves;

ability-j for coupled cars having this imve coupler to turn curves of shorter radii; T J

Fourth: decreased liability of unintentional disengagement of mating couplers.

Fifth: increased length of useful life of car couplers having our improvements; ex,- perience has shown that many couplers reach the end of their usefulness by-wearing out on the inner 0r pulling face of the hook or knuckle-and at other bearing. points, causing the distance fr0m the face of the hook to the guard arm opposite to increase to such an amount as to'allow two couplers to slip by one another, thus causing unintentional uncoupling. The object here gained is to provide such a shape as to increase the our p v position of two improvedco'uplersjwhen the amoun ng avoid confusion.

period during which the permissible wear will take place.

Our invention willbe stood 'by referencetofth accompanying drawings, wherein Figure 1' shows. in full carfc'ou;

" readily iunder plers having our 'im'provedj contolir, 'the dotted lines illustratin g ithe standard con tour Fig. 2 shows two couplers of improved contour 1n engagementfillustrating the'ex tent of angularamov'e'ment permitted; Fig. 3

shows a coupler of -improved cimtour in full lines in engagement With a'standard M. CJB. coupler, shown in' dotted fuses, and also illustrating in dotand' -dash lines the ex treme angular "movement" permitted, such relation; F 4 shows the} normal coupled center lines coincide and also'shows in-dotted lines the positi'onof maximuin-"lateral displacement when center lines'are parallelz and fifshows' the; relationof a coupler having our improved eontour'when mated with a coupler of standafrd contour, center lines being parallel and displaced laterally In, F g; 1, thef' dimensionand radius lilie have been applied; to only"'one coupler; to

'Referring to'Fig. 1- it will .be Seen that the contour is constructed about the two center lines X- X and set at right angles to each other. The methodof'construc tion is as followsz With radius a'two arcs are drawn tangent 'to'straightline'f Y which passes through intersection of center lines X-X and O() at adangl of 30 to line 0-0; the centers fromiwhich these arcs are struck are placed a distance from line X-X. lVith radius b arcs F and C are struck fromycenter located by dimensions and mandil? and n respectively. Arcs 'E. and Fiind C and D are then joined by tangent straight lines. With radius c arcs-are struck from centers located by dimensions h and 7' and by -2' and k and same are joined up with tangent straight lines. to fares F and C. Arc C whose; center is determined by i and lc joinedby a straight line tangent" to fit which passes through the point located by dimensions f, plus u and 'v to the are passing tour of amounts as indicated at point C and atpoint 1 whereby the transverse dimension through thelugs'or ears of the coupler head and through the pin hole cen ter of the knuckle is increased;'it is further. accomplished by the location of the pivot pin hole center eccentrically with the arcs describing the lugs of the head, this location is such that with the use of thes tandard M. C. B. knuckle pivot pin (1%") the thickness of the wall from. inner edge of pin hole to inner edge of contour at locatmn C exceeds the thickness of the wall from outer edge of pin hole to outer edgeof oontour at I by 21% and affords an increase of &1% in the moment of inertia (referred to pin hole center) of this transverse sectionthrough the pin hole center over the similar moment of inertia of a coupler constructed on the lines of the M. C. B. Association and with the pivot pin hole located concen-.

trically with the arc'defining the lugs of the head; this is illustrated by Fig. 1, where it will be seen that X dimens on for the improved contour exceeds a corresponding or 3/ dimension forthe M. C. B. contour and that the pin center for theimproved contour is located 6 distance from the center from which are is struck by radius Z, defining the ears or lugs of the coupler head, while the center for the pin hole .with the M. C. B. contour is located at the same point as center for enerating are struck by radius Z to de e the ears of coupler heads having the M. C. B. contour lines. Experience has shown that a large proportion oj/th'e knuckles and bars break 'from the pin hole inwardly to inner edge of the contour and to eliminate this and all other breakage of knuckle and head at this general location is the object gained.

' The second object is attained by an addition, as indicated at point B, to enable a thicker face wall to be obtained and thus eliminatethe breakages atthis point; experience shows that failures of car couplers at this location have been very frequent; it is to be noted that this increase is obtained without change in the relative position between the coupling face (inner curve of knuckle contour) and lock of the coupler.

The third object is attained by, first, re-

ducing the length of the point of the knuckle by removing metal as indicated at F to increase the transverse dimension from point of guard arm to point of knuckle, (w Fig. l) to enable the mating coupler to enter the recess between knuckle and head more readily and, second, by the combination of the changes as indicated at points A, D, F, and G, to enable a like improved coupler mating to take a position of maximum angle to 16% as compared with 151} for two mating couplers of the M. C.B. standard contour lines.

The fourth object is attained by metal added at location H which causes this portion of'the closed knuckle of a mating improved coupler to come in contact with the guard arm of mate after a lateral displacement less by "3/32 than the lateral 1 displacmeiit obtained with two mated coupiers of ithestandard Master Car Builders Association lines,- (the measurement in this case-being 9/16" while in the case of two new. improved couplers it is 15/32"), this is illustrated by F1 i and it will be seen that this greatly re uces the liability to become disengaged from the mating coupler.

The fifth object is attained, first; by an addition of an amount at location E which aifords this, increased amount of metal as additional material to be worn away before such an opening between point of knuckle and guard arm (minimum measure ment) is reached that will condemn the coupler from further service, for experience has shown that it is at this location where the greatest amount of wear to the contour takes place. This object is secondly accomplished by removing mm location D an amount of metal exactly equal to that amount added at location E so that the to by means of this increased slope (greater depth to the reentrant curve) there is caused increased liability for two im proved couplers when mated to wear toward each other, thus transferring the point of greatest wear inwardly and increasing the length of useful life of the coupler; this construction has the further advantage that it assists to reduce the liability for couplers to become uncoupled unintentionally as it is evident that-the increased hook shape at this portion of the contour will tend to hold couplers together. By referring to Fig. 4 it will be seen how this increased hook shape as formed by arcs E-D and DE are of Such shapes as to draw two mating couplers together until. their center lines coincide.

Having shownhow the above mentioned ob ects are accomplished a further object of our improvement is that the improved coupiers o the contour described herein couple oining arcs struck with radii a and a -makes with center line 0-0 is increased angle which the short tangent straight line I interchangeably with perfect freedom with couplers of the standard Master Car Builders Association contour lines as is evident from Figs. 3 and 5, and also couple with couplers having the standard Master Car Builders Association contour lines in such a manner that the liability to become uncopled is reduced as compared with two couplers of M. C. B. lines.

of which includes arcs A, B C 1 u E n 4 F a u H n and t I a joined y certain straight lines, substantially as shown and described.

3. A coupling head, the contour of which includes are A, are C struck from centers located by dimensions 2' and k and joined by a tangent straight line, and that are struck by d which passes between points located by dimensions g and p, substantiall as shown anddescribed.

EMUND P. KINNE. HENRY BLANCHARD. Witnesses:

LAURA CARLISLE, J. E. RYAN.

' copies of this patent may be obtained for the cents each, by addressing the Commissioner of Patents,

Wuhlngton, D. O.

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