US1025522A

US1025522A - Draw-bar mechanism.

Info

Publication number: US1025522A
Application number: US15353903A
Authority: US
Inventors: George H Forsyth
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-04-20
Filing date: 1903-04-20
Publication date: 1912-05-07
Anticipated expiration: 1929-05-07

Description

Patented May 7, 1912. v s SHEETS-SHEET 1. l

Gr. H. FORSYTH.

- DRAW BAR MEGHANISM,

APPLICATION FILED APB. 20, 1903. 1,025,522.l

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Patented my 7, 1912.

s 'SHEETS-SHEET 2.

G. H. FORSYTH.

DRAW BAR MEGHANISM.'

APPLICATION FILED APR. zo, 1903.

`lwientm May 7, 1912.

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',sitioii.

@EGBGB H. FORSYTH, OF CHGAG-D, ILLINIS.

13B/ATN -BAE MECHANISM.

Application filed April 20, 1905i. Serial No. 153,539.

Specification of Letters Patent.

Patented May 7; 1912.

To all whom it may concern:

Be it known that I, GEORGE H. Foizsvi'in a citizen of the United States, residing at Chicago, in the countyuof Cook and State of Illinois, have invented certain new and useful liiirnoveinents in Draw :lar Mechanism, of which the following is a specilication.

My .invention relates to that class of railway appliances which yrelate to the draft rigging of railway cars, and more particularly such as have to do 'with the centering of the draw-bai' mechanism.

The older forms of draw-bar centering devices consisted essentially of springs located on opposite sides of the draw-bar and operating, when the latter was deflected to one side or theother under the strains of draft, to automatically return the drawbar to .its central or-ot-lierwise noi-mal po- More recent devices of this nature have taken the general .form of a draiv-bai pivotally connected to the car at a point co incident or substantially coincident with the longitudinal axis of the king-bolt, said bar being provided with rod connections from its opposite sides to the truck-bolster' on opposite sides of the king-bolt, whereby the angular movement of the truck-bolster relatively to the car-body in passing around curves transmitted a corresponding angular swing of the draw-bar relatively to the central median line of the car-body` automatically maintaining the draw-bar thus at riglitfangles to the truck-bolster, this latter being a somewhat more favorable position for coupling purposes than that wherein. the draw-bar is always maintained coinci-A dent with the longitudinal median line of the car, when the cars are uncoupled. The last described ii'nprovement however falls short of the most effect-ive arrangement wherein the draw-hars of adjacent. and un `coupled cars would be automatically maintained substantially coincident with the line of draft on all kinds and character of track; and in Patents Nos. 766,610 and 785,9i3, granted to me August 2, 1904 and March '28, 1905, respectively, l have shown, de`

gular swing of the draw-bar greateiin amount than the angular movement ofthe truck-holster, such angular swing heilig proportional to the differences in degrees of curvature `of the trackg, and the essential` elements of such preferred means arep'dis" closed as consist-ing of a pair of pulleys or sprocket-wheels of unequal sizes, thelargcr being rigidly connected to the truck-frame and .the smaller to the carbody in advance While it is a desirable feature of such a j mechanism to thus malte the angular lead, ,l

of the draw-bar over the truck-bolster pre portion-al to ,varying degrees of curvature in the track in maintaining the draw-bar coincident with the line of draft, yet in practice it is not essential to the securing of satisfactory results thatl such exact-ness in the movements of the draw-bai be maintained; and I have found that the mechanisin disclosed in the patents aforesaid may be considerably modified and simplified by eliminating the larger pulley on the truckbolster and iii place thereof connectingthe ends of the chain or other flexible connection directly to the truck-bolster or other element of the truclvframe on oppositel sides of the king-boltand at distances from the lat-ter exceeding the radii of the smaller pulley, such flexible connection beingcapable of attachment to the truck either in advance of or in a line coincident with the pivotal point about which the truck turns. Such a construction produces a lateral swing of the draw-bar which is in excess of the angular movement. of the truck-bolster relatively to the bodybolster, although such excess is not directly proportional tothe varying angular movements of the. truckbolster caused by passing over tracks ofy varying degrees of curvature.

In the accompanying drawings I have CJ i illustrated two slightly modied forms -'of mechanism .in which my invent-ion may be embodied; and referring theretoFigui-e l represents a side elevation of a draft rigging and draw-liar'centering device constructed in accordance with my invention 5f iio Fig. 2 is a top plan view thereof; Fig. 3 is a`transverse vertical section on the line 3 3 of Fig. 1 looking in the direction of the arrow; Fig. l is a view similar lto F 1 '5 illustrating a modiiiedform of the inveni tion. Fig. 5 is a transverse vertical section, similar to Fig. 3, on the line 5 5 of Fig. 4:; Fig. 6 is a' detail perspective View of the draw-bar pivot-bolt; and Figs. 7, 3

and 9 are detail cross-sectional views illusl trating an anti-friction means for supporting the outer end of the draw-bar in the carry-iron.

Referring to the drawings, 1t) designates the bottom or vlicor of the end portion of a railway car, and 11 the draft-timl. ers or beams, 12 the end sill, pendent from which latter is the usual carry-iron 13.

14; designates the truck-bolster, 15 the bottom center-plate mounted thereon, 1 6 the top center-plate, 17 the body-bolster, and 18 the king-bolt passing through said parts and pivotally connecting the center-plates.

19 designates the drawfbar, having extending inwardly from its rear end the usual or bealns 11.

strap or yoke 20. This yoke is surrounded and incased by a'casingformed by a pair of oppositely-disposed channel-beams 2l and 22, the opposite side walls of which are '30 cut out leaving at the opposite ends ot said beams' inwardly extending and .meeting tongues 23 and 2,4, respectively, to the outer faces of which are bolted transverse tieplates 25. The rear ends ot the channel- 35,- beams are continued rearwardly in the form of upper and lower extensions 21au and 22, respectlvely, which embrace the upper-and,

. lower faces ot a support v26 rigidly bolted istering holes in the extensions 21a and 22R.

interposed reinforcing piece attend support 26, said bolt having on its lower end an enlarged head 27a and being retained in place by any suitable means, as, for instance.

: by a collar or washer 2S and a cotter-pin 29.l

30 designates the draft andbuiling spring located within the yoke, and at its opposite .ends abutting against a pair oil what. l term follower-shells 31, these latter being simply castings or short sections of channel-iron cut to a suitable length to fit between the abbreviated side flanges ot the channel-beams constituting the members of the casing, and 32 designates a pair oi follower-blocks which are capable of being inserted laterally. of the casing into operative position within the shells, the ends of said follower-blocks abutting against the inner edges of the tieaplates 25 and the inwardly- 5 extending tongues or flanges of the chan` nel-beams to which said tieplates are secured. The last described. draft-rigging mechanism is not claimed herein, but constitutes in part the subjectjmattm claimed in the aforesaid Patent, No. 735,943.

Referring now to the mechanism 'for automatically positioning the draw-bar, 33 designates a i'iulley, preferably in the nature et a sprocketwheel, rotatably mouniml on the lower end oi the pivot-bolt 27 and rest ing upon the enlarged head ot the latter. Secured to or formed integral with the upper tace of the pulley 33 is a controller herein shown as having' the form of a saddle 3lso disposed. as to lie across and seat the inner or rear end ot the lower extension men'iber of the yoke casing' and haying upwardly-extending wallsl which embrace and guide the sides of the latter. 35 designates a flexible pulley-actuatingmeans,preterably a sprocket-chain, which engages the forward portion of the lperiphery oi the pulley and at its rear ends is connected to the truck-bolster, entering mortises 1l formed therein and engaging eyes or staples 36 so disposed as to be in a straight line with the axis ot the king-bolt. .Elastic sections 37 are preferably interposed in the parts of the chain v35 on either side of the pulley 33 to take up any slack that may be present.

The operation is as follows: When a car is passing from straight to curved track and vice versa, or over track of varying curvature, the truclrbolster 14 undergoes an an'- gular movement relatively to the superposed car-body, whereby one end of the chain 35 is drawn rearwardly 'it' the cardmly relaliv. to Ee transverse plane of the hing-hol airthe other end moves tor- Such longitudiwardly to an equal extent. nal movement of the chain 35 sets up a partial rotation of the pulley 33, which latter, through the saddle 3dr, imparts :1 lateral angular movement to'the draw-bar equal to the extent of angular movement oit the-pul ley itself. 'lhis angular movement thus imparted to the .lraw-bar, by reason of the conn nection oi' the inner ends of the chain 35 to the bolster at radial distances from the center thereof greater than the radii of the pulley 33, causes an angular movement of the draw-bar considerably in. excess pf th angular movement of t-he truck-bolster, which suffices to move the draw-bur Sulliciently to one side of its position at rightangles to the bolster to .bring it substantially into the` line ol draft.. Ot course, the angular lead ol the draw-bar over the truchbolster constantly decreases as the angular travel of said parts is increased, owing to the fact that the effective radial. movement of the inner ends of the chain is constantly decreasing; but this lead is sutlicient for all practical purposes to carry the draw-bar into a position coincident with the line of, draft or substantially so on all degrees and characters of curves which are met with in practice. y

In Figs. t, 5 and (S I have illustrated a slightly imodified form of the inventiom wherein the chain 35a is connected lat its inner ends to eyes or staples 36 on the front face oi the truck-bolster. through the interposition .ot elastic connections 37a. ln this form ot my invention l have also illustrated a modilied means ot' impa-ft-ing to theedrawbar its angular movement from they partial rotation ot' the pulley 33, suoli means consisting in a square bolt 38 passed upwardly through correspondingly shaped apertures in the pulley 33 and the end extensions 21a and 22a of the draw-bar casing, said bolt being rotatably mounted in the upper and lower transverse members of a 'support 26'1 by means of bushings Si) rotatably mounted in said transverse members of the support and having squared bores to receive the bolt. The bolt hasan enlarged head 38 on which the pulley may rest, and secu-red in4 operative posit-ion by any suitable locking means, such as a cotter-pin 40.

My invention also contemplates the employment of means to facilitate the ease of lateral movement of the draivbar in the' form of anti-friction bearings interposed between the under side of the draw-bar and the upper surface ot' the carryiron 13. Such anti-friction devices may take a variety of forms; and in Figs. l., Il, 7, 8 and 9 I have .illustrated three ways in which these. devices may be applied. Referring to Figs. l, and 7, 19a designates a recess termed inA the under side oft' the draw-bar directly above the carry-iron, said recess containing a series of rollers 4l and having both side and end Walls confining said rollers againstescape' in any direction. In Fig. 8 l have shown a plate 4:2 secured to the underside ot' the draw-bar as by a bolt 13, said plate having formed in its under surface a pair of half bearings 42a adapted to seat a pair of rollers 43a. ln Fig. 9 l have illustrated still another form, wherein there employed a saddle 44: having upstanding side flanges 44 embracing the sides of the drawbai", and recessed on its under side to contain and confine a group of rollers 45.

I claim:

l. The combination with a car-body, a tru.cl-'r:.une and a draw-bar pivotally connected to said car-body, of a pulley rotatably mounted on the car-body in advance of the king-bolt, a flexible driving connection engaging the periphery of said pulley and at its ends secured to a member ot 'the truck- ;t'rame on opposite sides ot the king-bolt, and connections between said pulley and the draw-bar for imparting to the latter a lateral movement 'from the rotation of the pulley due to the angular movement 'of the truck-frame relatively to the car-body, substantially as described.

2. The combination with a car-body, a truck-frame and a draw-bar pivotally connected to said car-body in'advance of the lringbolt, of a lpulley mounted to rotate about the pivotal axis ofthe draw-bar, a flexible driving connection engaging the periphery ot said pulley and at its ends secured to the truck-bolster on opposite sides 'of the king-bolt, and connections betweenl said pulley and the draw-bar through which the rot-ation of the pulley effects a sidewise angular lnovement of the draw-bar, substantially as described.

3. The combination with a car-body, a truck-frame anda dravv-bar pivotally connected to said car-body in advance of the king-bolt, ot a pulley mounted to rotate about the pivot-al axis of t-he draw-bar, a flexible and extensible driving connection engaging the periphery of said pulley and at its ends secured to the truck-bolster on :opposite sides oit the king-bolt, and connections between said pulley and the draw-bar through which the rotation ot' the pulley effects a sidewise angular movement of the draw-bar, substantially as described.

.4. The combination With a car-body, a truck-frame and a.' draw-bar pivotally connected to saidl car-body in advance of the king-bolt, of a sprocket-Wheel m-.nmted to rotate about the pivotal axis of the draw bar, a sprocket-chain engaging the periphery of, said sprocket-Wheel and having an elastic extensible section interposed therein7 said chain being connected at its ends to the front face of the truck-bolster 0n opposite sides of the king-bolt, and connections between said pulley and the draw-bar through which the rotation. of the pulley etl'ects a si'dewise angular movement of the draw-bar, substantially as described.

5. The combination with a car-body, a truck-frame and a draw-bar pivotally connected to said car-body in advance of the lling-bolt, of a pulley mounted to 4rotate about the pivotal axis of the draw-bar, a flexible driving connection engaging theperiphery ofsaid pulley and at its' ends secured to a member of the truck-frame on opposite sides of the .king-bolt, and dravbar seating and guiding means carried by and angularly movable ivith said pulley, substantially as described.

6. rllhe combination with a car-body, a truck-frame and a draw-bar and draft-rig'- ging pivotally connected to said car-body in advance of the king-bolt, of a pulley mounted to rotate about the pivotal axis of the draw-bar, a lexible'driving connection engaging the periphery of: said pulley and at its ends secured to a member of the truckframe on opposite sides ot' the king-bolt7 and a saddle moiinted upon and rigidwith said pulley and itself seating' the draft-rigging, substantially as described.

7. rlhe combination with a carry-iron and a draw-bar supported thereby, ot' a plurality of anti-friction devices between said parts,substantially as described.

8. The combination with a carry-ironand a draw-bar supported thereby, of a plurality of anti-friction devices between said parts permitting lateral movement of the draw-bar in a horizontal line, substantially .as described.

9. The combination with a draft-rigging and a support therefor, of a pivotal connection insertible from beneath through said draft-rigging and its support, substantially as described.

10. The combination with a car-body, a truck trame, and a draft-rigging pivotally connected to said car-body in advance of the king-bolt, Oic y flexible connections between said. draft-rigging and an element of t-he truck frame for actuating said dratt-rig` ging from the angular movement of the truck frame relatively to the carbody, substantially as described.

11.The combination with a car-body, a truck frame, and a draw-barand draft-rigging pivotally connected to said car-b0dy in advance of the king-bolt, of flexible con,h nections between said draft-rigging and an element of the truck frame adapted to impart to said draw-bar anddraft-rigging a greater angular movement relatively to the car-body than the angular movement between the latter and the truck, substantially as described.

12. The combination with a car-body, a

truck frame, a draw-bar and a draft-rigging pivotally connected to said car-body in advance of the king-bolt, of flexible connections between said draft-rigging and the bolster of the truck trame for actuating said drawdiar and draft-rigging from the angular movement of the truck frame relatively tO the tar-body, snbstantiallyas described..

13. The combination with a car-body, a truck frame, and a draw-bar pivotally connected to said car-body, Ot a draw-bar controller pivotally mounted on the car-body in advance of the kingbolt, and flexible and extensible connections between said controller and -an element of the truck frame tor actuating said controller from the angular movement of the truck frame relatively tO the oar-body.l

- 14. The combination with a car-body and a truck frame, of a draft-rigging pivotally mounted on said. car-body in advance of the king-bolt, and devices for actuating the draw-bar sidewise connected to an element. of the truck :trame and operatively engaging said draft-rigging adjacent to its pivotal-point, substantially as described.

15. The combination with a car-body and a truck frame, of a draft-rigging pivotally mounted on said car-body in advance of the king-bolt, and. devices for actuating the draw-bar sidewise. connected to an ele ment of the truck frame and operatively engaging the draft-rigging at points diametrically Opposite to the pivotal point when swinging the draw-bar in either direction, substantially as described.

16. The combination with a car-body, a truck trame, and a draw-bar pivotally connected to said car-body on a center in advance of the ling-bolt, of flexible draw-bar operating connections directly attached to an element of the truck frame.

17. The combination with a car-body, a truck frame, and a draw-bar pivotally connected to said car-body On a center in advance Oi the ling-bolt, of flexible draw-bar operating connections directly attached to the truck bolster.

GEORGE H.. FORSYTH.

Witnesses SAMUEL N. POND, FREDERICK C. GOODWIN.