US739771A

US739771A - Car-truck.

Info

Publication number: US739771A
Application number: US11258802A
Authority: US
Inventors: Walter S Adams
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-06-21
Filing date: 1902-06-21
Publication date: 1903-09-22
Anticipated expiration: 1920-09-22

Description

rim-739,711. P'ATENTED SEPT. 22, 1903. J

w. s. ADAMS,

um TRUCK.

APPLIQTIOF YILED JUNE 21, 1902. F0 NOBEL. 5 SHEETS-SHEET l.

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No. 739,771. PATENTBD SEPT. 22, 1903.

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CAR TRUCK.

APPLICATION IILHD .TUNE 21, 1902.

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UNITED STATES" intenten september e2, 1903".

'PATENT OFFICE.

WALTER S. ADAMS, OF PHILADELPHIA,PENNSYLVANIA, ASSIGNOR TO JOHN A. BRILL, F PHILADELPHIA, PENNSYLVANIA.

CAR-TRUCK.

SPECIFICATION forming partici Letters Patent No. '739,77' 1, dated September 22, 1903.l

l Application led June Z1. 1902. Serial No. 112,588. (No model.) p

Improvements in Oar-Trucks, of which the following is a specication.

My invention has relation to pivotal cartrucks adapted to be employed in connection with electric motors, and it has more especial relationship to trucks wherein the bolster is supported upon longitudinally-disposed upwardly-arched semi-elliptic or leaf springs,

arranged at each side of the truck below the top bar of the side frames.

- The object of my invention is to simplify and reduce the cost of construction and maintenance of trucks of this kind and atthe same time preserve a great many of the features of trucks of this c1ass-namely, better equalization of the load under varying conditions of service, to produce an easy-riding truck both with reference to the superposed car-body and the action of the truck on the track-rails, to enable the axles of the wheels to be brought comparatively close together to produce what is known as a short-wheelbase truck, and to secure many other de-` sirable features hereinafter referred to.

My invention resides inthe novel construction and combination of parts hereinafter described, and further pointed out in the claims.

In the drawingsv forming part of this speciiication, Figure 1 is a side elevation of a truck made in accordance with my improvements. Fig. 2 is a plan view of the same. Fig. 3 is a transverse sectional elevation on the line n: no, Fig. 2. Fig. 4 is a side elevation showing the bolstervin a modified form, and Fig. 4t is a perspective view of the spring-plank hanger. Fig. 5 is a side elevation of a further modification; andFig. 6 is a transverse section of the same ou the line 6 6, Fig. 5. Fig. 7 is a side elevation of a further modification, and Fig. 8 views of several of the parts employed therein. Fig. 9 is a side elevation of a further modification, and Fig. 10 is a plan view of the link-hanger and spring-cap.

My invention is illustrated herein in con` vthe top ybars 9.

nection with an otherwise conventionally-oonstructed truck', which except for those features hereinafter more specifically described and claimed are not new with me.

Referring to Figs. 1, 2,and 3,1 represents the axles; 2, the wheels; 3, the axle-boxes. The truckV comprises the axle-box yokes or pedestals 4, having the innerand outer arms 5 6, extensions 7 from the outer arms connected transversely by cross-bars 8, the inner arms being connected by the top bars or chords 9, and between'the tops of the axleboxes 3 and the axle-box yokes extend the vusual axle-box springs l0. From the inner `angle-iron with their inner. vertical faces 16 opposed to each other and theirhorizontal flanges 17` secured to inwardlyextending bracket-like Webs18,extendinginwardly from At 19 are the upwardlyarched semi-elliptic or leaf springs arranged longitudinally of the truck beneath or adjacent the top of the bars and having their ends 2O loosely supported upon the lugs 1l between the danges 12, so as to permit them to slide when being lengthened or shortened under pressure. VIn this form of truck the bolster'21, of any desired form and located between the transoms, is not supported directly upon and connected to the springs 19,

gether by the headed cross -bars 28, upon` which rests a casting 29, whichlat'ter in turn IOC supports the spring-plank, to which it is fixed. The spring-plank supports the pair e'f short elliptic spring 22 (which may be transversely disposed, if desired) adjacent the links 24, and upon these elliptic springs rests the bolster, and which may be provided with center and side bearings in the usual manner. A thrust-spring may be employed, as shown, which extends between the top bar 9 of the truck-frame and the ends of the bolster and which may be supported in place in the usual way. By this construction the bolster and spring plank and the interposed bolstersprings may have the usual transverse or lateral swing without involving the longitudinal semi-elliptic springs to any undesirable extent, if at all. While the latter are so su pported they may be lengthened without involving strains upon themselves other than the support of the load. The links 24 may have, if desired, a slightlongitudinal swingthat is, a swing in the direction of the length of the semi-elliptic springs-so as to provide sufficient longitudinal flexibility between the bolster and the semi-elliptic springs to permit the bolster to engage the transoms, and thereby relieve the springs 19 of any undue strain due to the movement of the truck when being propelled or the converse movement of the bolster should the truck be employed under a car which is drawn. The connection of the cross-bars 28 with the links 24 may be rounded to allow forl this play.

Instead of'employing the form of springplank construction shown in Figs. 1, 2, 3 I may employ that shown in Figs. 4, 4, in which the spring-plank consists of a T-iron 3l, with the flange 32 vertically disposed and seated in a V-shaped cross-bar 33, having enlarged heads 34 at the ends of the arms 35, which receive the ends of the links 23, the vertical flange 32 of the T-iron resting in the'slot 36 of the bar and the horizontal web within a recess 37, formed upon arms, the parts being connected together by bolts, as desired.

My invention also embraces the form in which semi-elliptic springs 19 rest upon other and preferably spiral springs 38, the lower ends of the spiral springs being received in cups 39, resting upon the lugs 40, extending from the inner arms 5 of the axle-box pedestals, the ends of the semi-elliptic springs resting upon restraining-caps 4l, which in turn rest upon the spiral springs, the latter affording by their flexibility sufticientside motion to permit the semi-elliptic springs to elongate when in use, the ends of the semi-elliptic springs resting upon the caps. The bolster 42, of any desired form, is supported upon the semi-elliptic springs, so as to allow a transverse swing thereof without involving these springs, by means of the links 43, which are seated upon the recessed plate 44, secured on top of the band of the semi-elliptic springs, the links resting in the grooved recesses terminating in the bibs 46, which'keep thelinks in place, and upon the lower portions of the l links rests a casting 47, likewise recessed and bibbed, which in turn supports the ends 4S of the bolster, which passes between the links and under the springs, as shown in Fig. 6, the flange 49 of the casting being secured to the bolster ends. In this construction the springs 22, illustrated in connection with the preceding embodiment of my invention as being interposed between the bolster and the spring-plank, are eliminated, and the bolster rests upon and 4substantially ties the semielliptic springs together. The spiral springs 38V at the ends of the semi-elliptic springs resiliently support them, and by the difference in rhythm between the semi-elliptic springs and the spiral springs at their ends entirely absorb the jars and other undesirable effects of spring action and more perfectly equalize the load of the car while in action or during the application of the brakes to the truck, at the same time permitting perfect iiexibility between the bolster and transom and the semielliptic springs.

In the embodiment of my invention illustrated in Figs. 7, 8 I may employ either of the bolster constructions and supports therefor on the semi-elliptic springs, as previously described. However, I prefer that in this construction, for reasons which will be apparent hereinafter, the bolster 50, with the usual side and center bearings 51 52, be secured directly and rigidly to the semi-elliptic springs and that no intermediate bolster-springs be employed. This may be done, as indicated,

by the bolts 53 passing aroundpthe springs adjacent the band 54 and bolted to the ends 55 of the bolster. In this construction the inner arms 5 of the axle-box pedestals are provided with inwardly-euctending lugs 56, having a double aperture, the upper one, 57, to receive the hemispherical head V5S of a supporting-link 59, the lower aperture being larger and outwardly fiared to allow the stem of the link to play either transversely or longitudinally, the end of the link being provided with aneye 61 to receive the ends of the semi-elliptic springs 19, to which is secured the pin 62, passing through the eye, the connection being pivotal with relation to the eye. Thesemiellipticspringbeingconnected by the bolster, the latter is thereby free to swing transversely or longitudinally and to flatten upon thelink-support. Thislatter being located nearer the centers of the axles, as is the support of the ends of the springs 19 in all theother forms, reduces the leverage of the truck-frame in rising due tothe application of the brakes or from jolts or jars incidental to the riding of the truck. To make the connection between the semi elliptic springs and the links more flexible, the pin G2 may take the form of a seat 63, having a top recess 64, which receives a rounded lug 65, formed on the bottom of a guide-plate 66, having a groove 67, in which the ends of the semi-elliptic springs are located and which IOC IIO

of the springs may be secured directly to this seat by a pin 68, which latter should preferably be a pivotal connection. The seat is provided with rounded lugs 69, which may pivotally engage the eye 61, as does the pin 62.

In Figs. 9, l is illustrated a further modification of the link support. In this construction the lugs 70 support spiral springs 7l, on the top of which rests acap 72, having an aperture 73 through its center and grooves 74 in its top extending from said aperture. In these grooves isseated a longitudinallydisposed pin 75. This pin pivotally supports a two-part bolt, through the eye 75a of which the pin passes, the upper part 76 of which passes through the aperture 73 in the cap 72 and an aperture 76a in the lug, which latter i should be sufciently large to allow of the free swing of the links either longitudinally or transversely, the lower end 77 of the link being provided with an eye 78, supporting a pin 79, the pin supporting the upper part of a stirrup 80, having eyes 8l, through which passes a pin S2, and to this latter pin is socured the ends of the semi-elliptic springs 19. The intermediate joint of the link permits' the springs on both sides of the truck and the bolster to remain in a horizontal position without bringing any lateral or torsional strains on the semi-elliptic springs when the latter swing, the lateral swing of the semielliptic springs and bolster being had bodily from the top of the springs 7l, While iilexure of the spring 7l permits ot' suflicient longitudinalswing-thatis, thelink can swing bodily upon the pin transversely, while longitudinal swing may be provided for by the iiexure of the upper portion of the spiral springs.

The result of the construction shown in Figs. 1, 2, 3, and 4 is that the springs cop-.

erate together, so that vibrations of the carbody are irst taken by the elliptic bolster springs and then transmitted horizontally to the semi-elliptic equalizer-springs and thence vertically to the spiral axle-box springs, so that all act together in breaking up the primary rhythm of each kind of spring and produce a maximum effect to reduce the said vibrations and at the same time efticiently support the car-body. In the other 'modifications herein shown and described a similar effect is produced in a dierent way.

From the foregoing it will be clear that the support of the semi-elliptic springs from the axle-box pedestals can be accomplished in a variety of Ways in accordance with my in vention and considerably modied without departing from the spirit thereof.

Having described my invention, I claim- 1. The combination in a truck having side frames with top chords and axle-box pedestals with projectionsextending from said pedestals below said chords, longitudinally disposed semi-elliptic springs with ends adapted to longitudinally slide upon and to extend above said projections, and a bolster support- 'ed by and transversely connecting said semielliptic springs below the top chords.

2. The combination in a truck having a frame and axle-box pedestals, the longitudinally-disposed semi-elliptic springs movably supported upon the inner arms of the axlebox pedestals, and a bolster supported by said springs and adapted to swing therefrom.

3. The combination in a truck having a frame, and axle-box pedestals provided with. inwardly-extending lugs, upwardly-arched and semi-elliptic springs supported by said lugs, and a bolster extending between and adapted to swing from the arches of said semielliptic springs.

4. The combination in a truck, having a frame comprising a top bar and connected axle-box pedestals, lugs extending inwardly from the axle-box pedestals, longitudinallydisposed semi-elliptic springs under said top bar and having their ends supported bysaid lugs, and a bolster extending between the transoms, its ends being supported on the said springs.

5. The combination in `a truck having a frame and axle-box pedestals provided .with inwardly-extending lugs, longitudinally-disposed and upwardly arched semielliptic springs supported by said lugs, swing-links supported on the semi-elliptic springs, and a bolster pivotally supported by said links.

6. The combination in a truck having a frame and axle-box pedestais provided with inwardlyextending lugs, upwardly-arched semi-elliptic springs supported by said lugs, links resting upon the semielliptic springs, and adapted to have longitudinal and transverse swing, and a'bolster pivotally supported by said links.

7. The combination in a truck having a frame and axle-box pedestals provided with inwardly-extending lugs, the longitudinally- IOO disposed and upwardly-arched semi-elliptic springs supported by said lugs, a spring-plank` suported by said semi-elliptic springs, further springs supported on said plank, and a bolster supported on said latter springs.4

" 8. The combination in a truck having a frame, and axle-box pedestals provided with inwardly-extending lugs, upwardly-arched semi-elliptic springs supported by said lugs,

IZO

truck-frame, and the longitudinally-disposed semi-elliptic springs, a cap or cross-bar supported on said semi-elliptic springs, links depending from said cross-bar, a cross-bar connecting the lower ends of said links below said springs, a spring-plank supported on the latter cross-bar below said springs, springs on the spring-plank, and a bolster supported on said latter sprin gs.

11. The combination in a truck, of the truck-xfraniehelongitudinally-disposed semielliptic springs,links supported from the semielliptic springs, a T-iron cross-bar located below said semi-elliptic springs, recessed crossbars receiving the T-iron cross-bars, the T- shaped cross-bars being supported by said links, and a bolster supported upon said T- iron cross-bar.

12. In a car-truck, the combination with the truck-frame, semi-elliptic springs supported by the truck-frame, link-blocks supported on the top of the semi-elliptic springs, links supported by said link-blocks, a crossbar resting upon the bottom of said links and pivotally supported thereon, and a bolster, supported by said cross-bar.

13. In a car-truck, a frame, a bolster, a spring-plank, springsinterposed between the bolsterand spring-plank,semi-elliptic springs supporting said spring-plank, and resilient means for supporting said semielliptic springs.

14. In a car-truck, the combination of a frame, spiral and semi-elliptic springs in the same vertical plane, elliptic springs in transverse alinement with said semi-elliptic springs and a bolster supported by said elliptic springs.

15. In a car-truck, the combination of a frame, spiral and semi-elliptic springs in the same vertical plane, further springs in transverse alinement with said semi elliptic springs, and means for sustaining said springs in the proper positions relative to the frame.

16. In a car-truck,the combination with the spring-supported side frames, the longitudinal semi-elliptic springs supported by the side frames, a spring-plank supported on the semi-elliptic springs, elliptic springs on said plank, and a bolster on the latter springs.

17. In a car-truck, the combination with the spring-supported side frames, the longitudinal semi-elliptic springs supported by the side frames, a transverse spring-plank, links pendent from the tops of the semi-elliptic springs and supporting said plank, longitudinal` elliptic springs on said plank, and a bolster on said latter springs.

18. In a car-truck, the combination with the side frames having spring-supported axleboX pedestals, longitudinal semielliptic springs supported bythe projections below the top of the side frames, links pendent from the semi-elliptic springs,alateral springplank supported by said links, longitudinal elliptic springs on said plank, and a bolster on the latter springs.

Signed in the city and county of Philadelphia, State of Pennsylvania, this 18th day of June, 1902.

WALTER S. ADAMS.

Witnesses:

HENRY C. EsLING, HARRY RMCKILLIP.