US1360877A - Safety draw-bab - Google Patents

Description

E. J. BREWSTER AND 1. MURRIN.

SAFETY DRAW BAR.

APPLICATION F ILED JUNE 7. 1920- 1,360,877. Patented Nov. 30, 1920.

3 SHEETS-SHEET I. W

i i HWIEWW 1 I AM m J0 Nurrin E. J. BREWSTER AND J. MURRIN.

SAFETY DRAW BAR.

APPLICATION FILED JUNE 7. 1920;

Patented Nov. 30, 1920.

3 SHEETS-SHEET 2- "BZQMQ n 1 J M fiW Q W l IQl l l l HU dj I I l l I I Ik ZdZiness E. J. BREWSTER AND J. MURRIN.

SAFETY DRAW BAR.

APPLICATION FILED JUNE 7, 1920.

Patented Nov; 30, 1920.

* 3 SHEETSSHEET 3 fzr'iiiwess 97W fumes STATES PATENT OFFICE.

ELiaEn JfB RE-WSTER AND JOHN MURRIN, or CHICAGO, ILLINOIS.

SAFETY DRAW-BAR.

To all whom it may; concern Be it known that we, ELMER J. Bnnwsrnn and JOHN MURRIN, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in 1 Safety Draw-Bars, of which the following is a specification. 1 I

The invention relates to means for detachably connecting alocomotive engine and a tender, of a type in which a pair of super-imposed bars, consisting of a main draw bar and a safety or supplemental draw bar,

7 are employed in such a manner that the said connection is normally effected and maintained by the main] draw bar, and in the event of the breakage or impairment of said bar, disconnection of the locomotive 1 ends for the reception of draw bar pins suitably supported incastings having longitudinally extended pockets for the end portions of the draw bars, g

This. old style ,or type of construction is faulty and objectionable, for the reason the draw. bars are necessarily weakened by the eyes or openings therein, and to .prevent breakage thereof at their thus weakened parts, as well as breakage, of the saidpins, it is necessary to reinforce the draw bars and to make the pins ofsuch size as. to beboth bars and pins, heavy, cumbersome and difficult to handle or use in the circumscribed or narrow confines of thepockets of the castings.

To overcome thisdefect and objection by furnishing a safety draw bar or connectionof the class above named, in whlch no eyes or openings in the bars 'to weaken them, are employed, but onthe other hand, the same are strengthened at the points where they have heretofore been weak, and todispense with the draw bar pins, above mentioned, is one of the objects of our in vention.

Another object is to furnish a draw bar Specification of Letters Patent.

Application filed June 7, 1929. Serial No. 387,045.

Patented Nov. 30, 1920.

of such construction and operation of its parts as to equalize their movements, thereby maintaining the same distance or relation between the chafing irons on the tender and engine on any curve or side movement, and besides in rounding curves in the track. will automatically move inwardly of the curve and thus reduce or eliminate the excessive side pull on the wheel flanges of the tender and engine. 7

Other objects and advantages of the in vention will be disclosed in the following description and explanation.

The invention consists in certain peculiarities of the construction, novel arrangement and operation of the various parts thereof as will be hereinafter more fully set forth and specifically claimed.

In the accompanying drawings, which serve to illustrate the invention Figure l is a plan view, partly in horizontal section of the middle portion of the adjoining ends of a locomotive and its tender illustrating an application of one form of the invention. 7

Fig. 2 is a view in side elevation thereof.

Fig. 3 is a vertical longitudinal central section taken on line 8-3 of Fig/1 looking in the direction indicated by the arrows. Fig. 4 is a plan view partly in section of the pocketed casting or foot plate of the locomotive showing a modification in the means for connecting the draw bars thereto. Fig. 5 is a crosssectional view taken on line 55 of Fig. 4 looking in the direction indicated by the arrows, and V Fig. 6 is a similar view taken on line 66 of Fig.1 as indicated by the arrows.

v Like numerals of reference designate cor responding parts throughout the different views of the drawings.

7 Referring now more particularly to Figs. 1 to 3 inclusive and Fig. 6 of the drawings, the reference numeral 10 designates as a whole the draw bar receiving casting or member which is mounted on the rear portion of the locomotive and may be of any suitable size, formand construction externally but is, provided with a, horizontally disposed pocket 11 the rear end of which terminates in a flared opening 12 located below the chafing irons 13 and 14 of the casting or member 10 and the draw head 15 of the draw bar receiving casting or member of the tender, which is indicated as a whole by the reference numeral 16. The chafing irons 13 and 14 may have interposed therebetween a floating block 17 adjusted by means of a wedge 18 of the ordinary construction and in the well known way, but of course it will be understood that the above mentioned elements form no part of our invention.

As is clearly shown in Fig. 1 the casting or member 10 is provided at each side of the pocket 11 therein and inwardly of the flaring opening 12 with an inward extension 19 which extends from the bottom or floor 19 to the top 20 of the pocket 11 and each of said extensions has in its inner surface an arcuate recess 21 for the reception and operation of the outer ends of'a pair of dogs 22 each of which has its end adjacent the recess 21 with which it co-acts rounded as shown.

The floor of the pocket 11 of the casting 10 is provided inwardly of the extensions 19 with a transversely disposed slot 23 through which are vertically extended pins or projections 24 one of which is located on the inner end of each of the dogs 22 as will be readily understood by reference to Fig. 6 of the drawings. The pins 24 are connected together by means of a link 25- located thereon within the slot 23 and preferably held in place by means of pins 26 extended through suitable openings in the projections 24 below said link.

The casting or member 16 of the tender may be made of any suitable size, form and material, but as shown, is provided with a horizontally disposed pocket 27 terminating at its end adjacent the casting 10 with an opening 28 in register or alinement with the opening 12 of the pocket 11 in the casting or member 10 of the locomotive. The casting or member 16 is shown as being rigidly mounted on the front end sill 29 of the tender and has on each of the side walls of its pocket 27 near the mouth or opening 28 thereof an inward extension 30 each of which is provided with an arcuate recess 31 for the reception and operation of a dog 22 of the same construction and arrangement of its parts as that employed in the casting or member 10 and above described.

The casting or member 16 is provided in the floor 32 of the pocket 27 with a transversely disposed slot 33 for the reception of the link 25 which unites the pins or projections 24 on said dogs. 7

Mounted on the floors 19 and 32 of the castings or members 10 and 16 respectively is a main draw bar 34 which has longitudinally mounted on its upper surface another or auxiliary draw bar 35 which are of the same construction but of slightly differ ent dimensions, that is, the main draw bar.

34 is by preference shorter than the draw bar 35 as will be readily understood by reference to Figs. 1 and 3 of the drawings. Each of these draw bars is provided at each of its ends with a head 36 somewhatv wider than the main or body portion of the bar. Each of these heads is provided with a rounded or arcuate recess 37 on each side of the main or body portion of the bar for the reception and c0-action with the ends of the dogs 22 which carry the depending pins 24. It will be understood that the recesses 37 on each of the heads 36 of the auxiliary draw bar 35 are located longitudinally at a greater distance apart than the recesses 37 on the main draw bar 34, and consequently, the main draw bar 34 will, after the draw bars have been placed in proper position within the pockets of the castings with respect to the dogs 22, sustain the stress or strain while the auxiliary draw bar will be without such stress or strain, yet in position to assume the same should the main draw bar become broken or impaired.

From the above described construction and arrangement of the parts it will be understood that a rolling action between the dogs 22 and their hearings or the recesses in the heads of the draw bars and in the extensions 19 and 30 of the castings 10 and 16 respectively, with which said dogs co-act,

will be produced and that in the movement I of the vehicles on a curved track, the parts will automatically move toward the inside line of the curve and will thus eliminate the excessive side pull on the wheel flanges of the tender and engine, besides, it will be understood that an equalizing draw bar connection will be afforded which willkeep the chafing irons on the tender and engine in the same relative position on any curve or side movement.

While we have shown the auxiliary or safety draw bar as being located above or on top of the main draw bar 34, yet it will be understood that this arrangement is not essential as their positions may be reversed and the same function attained. As shown, the dogs 22 are of sufficient dimensionsto extend from the floors of the castings or members 10 and 16 slightly above the upper surface of the uppermost draw bar and that as the strain on said dogs will be presented longitudinally thereto that great strength and durability will be afforded. Furthermore, it is apparent that as these dogs are provided on their lower surfaces at one of 7 shown a modification in the construction of l and 16 are of the same construction as shown in Figs. 1 to 3 inclusive and above described, except that the floors 19 'andy32 and the tops of the'pockets 11 and 27 of the castings or members 10'and 16 respectively are provided with vertical openings 38 located near the recesses 21 and 31 of the members 10 and 16 respectively but between said recesses and the slots 25 in the bottoms of said castings or members for the reception of pivot pins 39 which are extended vertically through suitable openings in dogs near their rounded ends which co-act with said recesses. These dogs in the modified construction are substantially the same shape as the dogs 22 above described, and are connected together at their ends adjacent the heads 36 of the draw bars by means of depending projections 24 and links 25 uniting the same in a similar manner to that above described with reference to the dogs of the first described construction. The pivot pins 39 are prevented from displacement downwardly through the openings 38 in which they are located by means of a keeper bar 40 on which they rest at their lower ends and which bar is bolted to brackets 41 depending from the bottom or fioor of the casting or member on which they are mounted.

While we have shown thedevice as employing a main draw bar and an auxiliary or safety draw bar, and will generally use the same, yet we desire it to be understood 7 that one of said draw bars may be omitted,

if desired, without departing from the spirit of the invention.

' Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent is -1. In a device of the class described, the

. combination with a pocketed draw bar receiving casting or nember mounted on a railroad vehicle and having in each of the side walls of its pocket near one end thereof an arcuate recess, of a dog located at one of its ends in each ofsaid recesses and coacting therewith and each having near its other end a projection, a link loosely uniting said projections, and a draw bar having a head wider than its body and provided at its juncture with said body and on each side thereof with a recess for the reception of and co-action with the ends of the dogs adjacent said projections.

2. In a device of the class described, the

combination with a pocketed draw bar receiving casting or member mounted on a railr ad vehicle and having in each of the side walls of its pocket near one end thereof an arcuate recess, of another pocketed draw bar receiving casting or member mounted on a railroad vehicle adapted to be coupled to the first named vehicle, the last named casting or member having in each of the side walls of its pocket near one end thereof arcuate recess, of a dog located at one of .each of said dogs having near its other end .a pro ection, a link loosely unitlng said projections transversely with respect to the dogs, and a draw bar having at each of its ends a head wider than its intervening body, each of said heads provided at its juncture with said body and on each side thereof with a recess for the reception of and coaction with the ends of the dogs adjacent said projections.

3. In a device of the class described, the combination with a pocketed draw bar receiving casting or member adapted to be mounted on a railroad vehicle and having in each of the side walls of its pocket near one end thereof an arcuate recess, of another pocketed draw bar receiving casting or member adapted to be mounted on another railroad vehicle to be coupled to the first named vehicle, the last named casting or member having in each of the side walls of its pocket near one end thereof an arouate recess, of a dog located at one of its ends in each of said recesses of each casting or member and co-acting therewith, each of said dogs having near its other end a depending projection, a link loosely uniting said projections transversely with respect to the dogs for holding the ends of said dogs at a distance apart than their other ends, and a main and safety or auxiliary draw bar superimposed one on the other and each having at each of its ends a head wider than its intervening body portion, each of said heads provided at its juncture 'with said body portion and on each side thereof with a recess for the reception of and co-action with the ends of the dogs adjacent said projections, the said recesses in the heads of the safety or auxiliary draw bar being longitudinally spaced at a greater distance than the recesses in the heads of the main draw bar.

4. In a device of the class described, the combination with a pocketed draw bar receiving casting or member mounted on a railroad vehicle and having in each of the side walls of its pocket near one end thereof an arcuate recess, of a dog located at one of its ends in each of said recesses and co acting therewith and each having near its other end a projection, a link loosely uniting said projections, and a draw bar having a head wider than its body with no eyes or holes therein for pins and provided at the juncture of said body and on each side thereof with a recess for the reception of and coaction with the ends of the dogs adjacent said projections.

5. In a device of the class described, the

. its ends in each of said recesses and coacting therewith and each having near its other end a projection, a link loosely unit j ections.

ing' said projections, and a draw bar having" In each of its sides near one end thereof a recess for the reception of and co-actlon with the ends of the dog's adjacent said 'pro- ELMER J. BREWSTER.

JOHN IVIURRIN.

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