US604784A - peckham - Google Patents

Description

(No Model. 4 SheetsSheet 1.

E. PEGKHAM.

OAR TRUCK.

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E. PEGKHAM.

UAR TRUCK. No. 604,784. Patented May 31,1898.

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E. PEGKHAM.

GAR TRUCK Patented May 31,1898.

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EDGARPECKHAM, OF NEW YORK, N. Y.

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@PECIJFICATION forming part of Letters Patent No. 604 784, dated ma 31, 1898. Application filed August ti, 1897- Berial No. 847,094. (No model.)

To all whom it may concern:

Be it known that I, EDGAR PECKHAM, a citizen of the United States, and a resident of New York, county and State of New York, have invented certain new and useful Improveinents in Car-Trucks, of which the following is a specification.

This invention relates'to improvements in car-trucks particularly intended for heavy elevated or suburban electric cars, It is also f adapted for cable and other street railways;

The truck relates to the class known as double trucks, employed for supporting long car-bodies, the car-body being mounted upon apair of the trucks, which are equipped with compound brake-lever appliances.

The object of the present improvementsis,

to provideaatruck particularly adapted for supporting h'eavy cars made use of in. highspeed service, and the parts are therefore heavily constructed. a My improvements comprise a certain novel construction of the side frames intended to afiord great strength to the truck and render it capable of sustaining the weight of the carbody mounted upon a center-bearing bolster; also novel means of supporting the. centerbearingswing-bolster on the truck also novel means or obtaining increased traction on the driving-wheels of the truck, and also means for insuring an even application of the brakes when running through a curve.

My present improvements are illustrated in the accompanying drawings, which form part.

of this specification, and wherein like parts are indicated by like numerals of reference in the several views, and wherein-' .Figure 1 is aplan view of the truck embody ing the invention. Fig. 2 is a side elevation of the truck shown in Fig. 1. gitudinal sectional view on the line 3 3-of Fig. 1, certain parts being broken away. Fig. 4 is a transverse sectional viewon 'the line 4 4 of Fig. 1. Fig. 5 is a side elevation of a truck, illustrating certain features hereinafter described. Fig. 6 is a plan view of Fig. 5, and

Figs. 7 to 13 show detailspertaining to Figs.

5 and'6. Referring to the drawings,-1t will be seen that the side frames comprise the yokes or pedestals 14, upper longitudinal beams 15,

preferably duplex, as shown, and which sonof the yokes 14 upward I The truck has a short ster at the center bridge-truss giving to the side frames the req- Fig. 3 is a lonnectthe yokes 14 together-near the center of their vertical height, and lower longitudinal 1 same plane as beams 15, and the under trussbean 1s 18 extending from the outer lower ends to the end bcams'lil. wheel-base, and the side, frames;are;.; constructed to afiord great strength,- the'beams consisting of soft steel hot-riveted to soft-steel pedestals, into which jthe-upper' beams are inlaid before riveting. =Ti1e -jlower ;beam l'li'issecured by rivets in poeketsjcast in the lower, sections of thepedestals. Between the lower and upper beams -15 and "1610f each side frame is secured a bridge-truss '19,

riveted to said beams and braced against the lower sections of the ped- .estals. Theisideframes trussed as shown renders it possible, in a truck having longitudinal beams connecting. the pedestals t0- ge'ther, to locate the carrbody-supporting bolof the wheel-base, the

uisite strength-to sustain the weight ofthe car-body with safety.

' Within the yokes 14 the journal-boxes 20 are arranged to operate in the usual manner,- and above the tops of the journal-boxes are placed spiral springs 21, as shown in dotted lines Fig. 2, the said springs entering recesses in the top member .of the yokes 14 and serving to spring-cushion the truck on the journal-boxes, and thus assist in preventing the pounding of the rail-joints. The axles of the truck are indicated at 22 and the wheels at 23.

At the longitudinal center of the truckframe there is located the swing-bolster 24, composed 'of two channel-bars set on edge and held together by being riveted to the bearing-plates 25, the swivel' plate 26, and the springsockets 27. The bolster 24 is carried upon the spring-plank 28, being supported thereon by a system of springs comprising i the half-elliptic spring 29 and the spiral nest-- springs 30. The half-elliptic spring 29 has its ends loosely seated in pockets 31 and is provided centrally with a strap 32, having'a concave depression in its top, which receives a convex-bearing 33, attached at the bottom of the swing bolster, thus providing a flexible,-

truck-frame in rigid alinement.

connection between the bolster and said spring. Spring-caps 27, to receive the spiral nest-springs, are also provided on the springplank 2S, and are preferably formed integral with the pockets 31 for the half elliptic sprin Th; bolster of the car may be provided with side bearing-plates adapted to rest on the bearing-plates of the swing-bolster 24: to admit of a limited rocking motion of the car, governed by the stillness of the spiral nestsprings 30, and thus add greatly to the ease of riding, since it permits the wheels on one side of the truck to rise independently of the car-body.

The spring-plank 28 is suspended by four links 34, two at each side of the truck, the links being carried by the two transverse bars or transoms 35, which rest in pockets 36" in the side beams 15 of the truck-frame. The transverse bars or transoms 35 are rigidly bolted to the side beams 15, and thus serve to hold the. transverse end beams 36 of the The transverse bars or transoms 35 also serve as a guide for,the swing-bolster 24, preventing it from moving in a direction longitudinal with the ear. To the transverse bars or transoms 35 are also riveted pockets 37,which receive the spiral springs 38, upon which rests the support 39 for the nose of the motor.

The four links 31L have normally aslight outward inclination, as shown in Fig. 4. The effect of this is to raise that side of the carbody toward which the bolster 2; moves when the truck passes onto a curve, thus giving the efiect of an additional superelevation of the outside rail of a curve.

The brake-rigging is fitted with flat brakebeams 40, equipped with the brake-shoes 41.

The brake-shoes 41 are pivoted to links 42,

which are in turn pivoted to brackets 43, supported on the transverse end beams 36. To the inner sides of the brake-shoes at one end of the truck there are pivoted at each side of the truck the upright levers M, and to the heads of these levers is secured the equalizer or floater 45. The floater 4:5 is provided with a segmental piece 46, on which the rod 47 (leading to the sway-bar, secured to the bottom of the car at its longitudinal center) works through a roller 48, journaled in the strap49, embracing the floater and segmental piece 46, the said roller 48 being so mounted with relation to the inner segmental curve of the piece iii as to insure an even application of the brakes when the ear, mounted upon the pair of trucks, is rounding curves.

The means for obtaining increased traction or the two wheels supporting the motor, known as the driving-wheels, will be seen in Figs. 5 to 13. In Figs. 5 and 6 the carbody-supporting springs 50 are of the halfelliptic type and have their ends seated in pockets 51 on the side beams 15 of the truckframe and are connected to the center-bearing bolster 52,. upon which the car-body (inper cent.

Spiral springs may of in lieu of the half-ellipthe bolster on the dicated at 53) rests. course be employed tic springs for supporting truck.

At one end of the truck-frame, preferably the inside end, its transverse beam 36is provided with the bracket 54, having an elongated portion serving as a guide for bolt 55, which is connected by a strap or frame 56 to the half-elliptic spring 57. In the frame 56, centrally over the top of the half -elliptic spring 57, is journaled the roller 5S,which is adapted to come in contaet'with a plate or bolster 58, attached to the under side of the car-body.

The ends of the half-elliptic spring 57 seat iii-pockets 59, riveted to the end beam 36. These pockets 59 may be made in various ways with a view of rendering them adj ust-' able, so that the height of the surface uponwhich the ends of the half -e1liptic springs seat may be increased or decreased, as desired, to increase or decrease the tension upon the half-elliptic spring 57. In Figs. 8 and 9 the pockets 59 are adaptedto receive a series of plates 59, so grooved as to interlock with the inside surface of the pocket and also with one another, and thus prevent their displacement. In Fig. 10 the shank of the pocket 59 isprovid'edwith a series of holes to adapt it to be connected to the end beam 36 at diiferent elevations.

In Figs. 11 to 13 the device is made in two parts, one part 59 being riveted to end beam 30 and adapted to receive the shank of pocket 59 and be secured in place by a bolt, as shown. The pocket 59 thus formed is easily removable, and between it and the fixed part 59" there is placed a washer of indurated fiber 60, as shown. With a series of pockets 59 of varying heights the desired tension on spring 57 may be obtained by selecting a pocket of the requisite height. IVith these several forms of pockets, which are-modifications of one another, the tension onthe half-elliptic spring 57 may be varied, as desired, and thus the tract-ion on the truckwheels regulated.

It will be observed that the trae tion-regulating appliances are located outside the wheels of the truck at the extreme end of the truck. By this arrangement, in a truck equipped with a center-bearing bolster, weight is thrown on the end of the truck outside the wheels, which are between the bearing of the bolster and the end of the truck-frame, thus rendering it possible, by suitable adjustment of the tension of the half-elliptic spring of the traction-regulating appliances, to put about seventy-five of the traction on said wheels and without interfering with the freedom of action of the car-body. It will further be observed that the moter is suspended from the axle of that pair of wheels which is between the center-bearing bolster and that end of the truck upon which the traction-regulating appliances are secured. 'By this arrangement the greatest amount of traction is ob- 1. In a car-truck, the combination with the of a car-body-supporting bolster,

side frames, I a spring-plank suspended by links below the bolster, a half-elliptic spring and a pair of .ing on said plank at or spiral springs arranged and supporting the'bolster, the ends of said half-elliptic spring bearing on the springplank toward its ends and at its middle sup: porting said bolster, and the spiral springs also bearing on the spring-plank near its ends.

2. In a car-truck, the combination with the side frames, of a car-supporting bolster, a plank suspended below the bolster, spiral springs and a half-elliptic spring between the plank and bolster, and a yielding bearing between the bolster and said half-elliptic spring. 3. In a car-truck, the combination with the side frames, of a car-body-supporting bolster, a-spring-plank and two pairs of links whereby said spring-plank is the bolster, and a series of springsall bearnear its ends, a part of said springs directly supporting the bolster at or near its ends, and the rest of said springs supporting the bolster at its center.

4. In a car-truck, the combination with the side frames, of a car-supporting bolster, a plank suspended below the bolster, spiral springs between the plank and bolster, and

"a half-elliptic spring bearing on the vplank near its ends and against the bolster at its center, and apair of transverse bars or transoms one on each side of the bolster and supported by the truck. v

5. In a car-truck, the combination'with the side frames, of a car-body-supporting bolster com posed of two channel-bars set on edge and held together bybearing-plates at their ends and a suitable plate in the middle, two transverse bars or transoms secured in pockets on the side frames of the truck, two pairs of links suspended from said transoms beyond the ends of the bolster, a spring-plank supported by said links beneath the bolster, and a series of springs arranged on said springplank and sustaining the bolster, one of said springs bearing onthe spring-plank near its ends and bearing against the bolster at its center.

(3. in a car-truck the combination, with the side frame, of a bolster, links depending from supports on the truck-frame and having a slight outward inclination from the point of support, a plank supported by the links at their lower ends, and springs bearing on said "bolster by said links,-

on the spring-plank suspended beneath top with a rolling ends of said half-elliptiespring to rest in, and.

plank near its ends, one of said springs supporting the bolster at its center.

7 in a car-truck, the combination with the side frames and transverse bars or transoms 35 seated in pockets on the side frames, of a car body supporting bolster arranged between said transoms, two pairs of links car-.

ried by said transoms beyond ends of the bolster, a spring-plank suspended below the a halt-elliptic spring the ends of which bear on said spring-plank near its ends, the center of the bolster resting on said spring and two spiral nest springs seated in pockets attached to the bolster and the spring-plank near the ends of thelatter. 8. in a car-truck, the combination with the transverse end beam connecting the side frames together, of shalt-elliptic spring suitably mounted on said end beam andprovided on its top with a rolling wheel or the like adapted tocoact with the car-body sill against which said wheel pose set forth. I v

9. In a car-truck the combination with the transverse end beam of the truck-frame, of a half-elliptic spring mounted on said end beam, adjustable pockets for the end of said half elliptic spring and means on top of said spring adapted to coact with the car-body sill as set forth.

10. In a car-truck, the combination with the transverse endbeam of the truck-frame, of a normally bears for the purhalf-elliptic spring suitably mounted on said end beam, adjustable pockets for the ends of said half-elliptic spring, and a rolling wheel or the like journaled on top of said spring and adapted to coact with the car-body sill for the purpose setforth. r

11. In a car-truck, the combination with the end beam, of a half-elliptic spring adj ustably supported on said beam and provided on its wheel, and pockets for the removable portions adapted to fit said pockets to vary the height or their seating-surfaces for the purpose set forth.

12. The combination with a cartruck equipped with a cen tor-bearing car-body-sup= porting bolster, of a spring traction-regulat-= ing appliance located on the end of the truck outside the wheels, whereby increased traction is obtained on the wheels between the bolster and said end of the truck, 7

13. In a car-truck, the combination with a center-bearing bolster and the driving-wheels, of a half-elliptic spring adj ustably'sn pported on the end beam of the truck outside the driving-wheels and provided with a rolling wheel on its top surface for the purpose set forth.

14. In a car-truck, the combination with a center-bearing bolster and a traction-regulatingappliance supported upon the end beam of the 'tmck-frame, of a pair of wheels and their axle between said bolster and traction: regulating appliance on said end beam, and a motor supported on the axle of said wheels,

.15. in a ear-track, the combination with the.

are

driving-wheels and a. motor supported on the Signed at New York, in the county and State axle of said wheels, of a center-bearing b0? of NewYork, this 2d day of August, 1897. sfier supported on the truck-frame and a he elliptic spring adj ustably supported on the EDGAR PECKHAM' 5 end beam of the truck-frame, outside the Witnesses:

drivin -wheels, and provided with a rolling C. L. MALCOLM, Wheel at its top, for the purpose set forth. G. H. BOWERS.

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