US1092357A - Pedestal car-truck. - Google Patents

Description

J. M. HANSEN.

PEDESTAL APPLICATION FILED 00111 1910 CAR TRUCK,

2 SHEET$SHEET 1.

m o w INVE WETN ESSEQ J. M. HANSEN. PEDESTAL CAR TRUCK.

APPLICATION FILED OCT. 17, 1910.

Patented A r; 7, 1914,

2 SHEETS-SHEET 2.

INVENTOHQ WITNESSEfio a F. WM

NrrnD srATEs PATENT OFFICE.

JOHN M. HANSEN, OF PITTfiBURGH, PENNSYLVANIA.

PEDESTAL GAR-TRUCK.

Specification of Letters Patent.

Patented Apr. '7, 1914.

Application filed October 17, 1910. Serial No. 587,437.

proved construction of truck which will to sudden not be subject to breakage due.

' the trackstrains caused by unevenness in way. i

A further object is to provide an improved cast metal side frame constructed along mechanically correct linesto obtain the greatest resistance to working stresses, and thus providing a unitarypedestal side frame having all the advantages of the ordinary diamond side frame truck made up of several bars and separate pieces.

It is well known in railway practice that the two opposite rails of the track seldom have their to surfaces in the same plane for any consi erable distance; and that on account of defects in the road bed, the wheels on one side of a truck are often suddenly. depressed or raised, thus causing jolting and terrific side strains in the truck body. Like strains are caused by lateral inequalities or imperfections in the track, such as in passing around curves, and the lateral and twisting strains continually wrench and often cause the breaking of the rigid pedestal truck bodies where the two side frames are rigidly connected.

By my invention I am enabled to over come this difficulty, and to that end I provide a truck having. side frames of the pedestal type in which spring seats and springs are provided above the journal boxes embraced by pedestal guides or jaws; and the side frames are directly connected by the truck bolster bv means of flexible connections, so providing for flexion in the truck frame itself while properly spacing the side frames, and permitting the truck to better conform to the irregularities and inequalities of the track. I also dispense with the rigid end tie bars and other connections between the side frames and so reduce the cost thereof.- My preferred construction also comprises a pedestal side frame of integral cast metal provided with recesses and braces corresponding to the arch bars and tie'bar of the diamond side frame type.

In the drawings Figure 1 is a plan view partly in horizontal sect-ion of a railroad car truck illustrating my invention. Fig. 2 is a side elevation of the truck illustrated in Fig. 1. Fig. 3 is a transverse vertical section onthe line 3-43 Fig. 2. Fig. 4 is a detail fragmentary horizontal sectional view illustrating the flexible connection between the connecting bolster and the side frame and Fig. 5 is a detail vertical longitudinal section illustrating the integral cast metal journal box guides or jaws.

The side frames 1 of the truck may be of any known form of pedestal truck to obtain the necessary strength. The side frames 1 illustrated are constructed of cast metal such as steel or iron and embody certain detail improvements. Each side frame has the journal box guides or jaws 3, 4 containing the journal .box seats 2. Each journal box seat 2 has an upward extension 2' forming the spring seat in. which the springs'5 of ordinary construction are carried above the journal boxes 6. The upper member 7 of the truck frame 1 is a portion of the entire casting extending longitudinally over the spring seats 2 and downwardly to form the outer box-guides 3. It has the shape of a rolled section, such as the L-bar illustrated in the drawings, and forms in effect the upper arch bar of the truck. The bracin members 9 extend diagonally across the divided recesses 10 in the side frame, joinin the upper member 7' near its juncture wit the interior box-guides 4, and joining the lower member 11 near its juncture with the bolster guides 12. The lower member 11 and bolster guide members 12 are integral with the upper member 7 and diagonal bracmg members 9, but the bracing members 9 correspond mechanically to the lowerv arch bars of the diamond side frame truck and the lower member 11 forms the two pedestal tie bars.

The lower member 11 extends longitudinally to the inner box guides 4 which are provided with the bolt holes 13 in alinement with the corresponding bolt holes .14 in the The members of the side frame proper above separately described form one integral cast metal structure which has all the ad; vantages of lightness obtained by the rolled sections andtie bars of other non-integral trucks. It is truly a pedestal type of truck, however, as the springs are carried above the journal boxes and the connecting bolster in the seat 16. between the bolster guides12- sarily the center bearing 18 on which the I car bolster is swiveled and supported. The brake beams 19 and brake beam hangers 20 also form no part of my invention and like the journal boxes 6, these may be of any suitable construction. The truck bolster 17, however, is directly and flexibly seated in slots or seats 21 in the side frames between the bolster guides 12 thereof. The cross bar 22 connects the pedestal guides 12'and supports the end 23 of the truck bolster at the proper height in the frame forming the lower wall of the slot 21 and having below it a recess 24: for the sake of lightness of construction.

Each end 23 of the truck bolster 17 is flexibly connected to the side frame 1. I prefer to connect the bolster to the side frame as illustrated by providing a reduced end 23 on the bolster of less depth than the depth of the slot 21 and provided with the transverse lower flanges or lips 25, 26, which are adapted to register with and embrace the cross bar 22 when the bolster is adjusted in position. Any other flexible or yielding connection between the truck bolster and the side frame however, is within the spirit of my invention which comprises broadly a truck frame adapted to be hung and cushioned upon the car axles, and having its 0 posite side frames directly joined by a yielding or flexible connection. To provide for centering the bolster longitudinally of the side frames, and permitting easy fiexion between the bolster and frames, I provide the projecting shoulders 28 at the base of the seats 21, and extending up only a short dis-- tance on the sides of the end portions 23 of the bolster, leaving the bolster free to swing or rock in said side frames.

The car axles 25 connecting the wheels 27 suffice to hold the wheels in upright position rigidly, the journal boxes mounted on the axles and in the side frames space the side frames apart and sustain them in roper upright position, and the weight of t e car upon the truck bolster 17 holds it normally in the seats 21 of the side frame. When either of the wheels 27 is raised suddenly by a jolt of traiiic the effect is merely to raise one of the side frames without alsotransmitting a heavy stress to the opposite side .franae. The truck frame can also conform to lateral or twisting strains, by the swinging of the frames onthe ends of the bolster, so permitting the wheels to more easily follow the track, relieving friction between the Wheels and rails, and overcoming liability of breakage from strains of either character. The effect is merely to pivot the connecting bolster 17 at each end slightly about the supporting cross bar 22, the truck returning to normal alinement as soon as the shocks or strains have been absorbed in the springs or otherwise. I

What I claim is:

1. A car truck having side frames, wheel axles joining and supporting the same, each of said frames being provided with a seat,

and having a flexible connectlon therewith comprising downwardly extending lips embracing said seat, said connection permitting vertical rocking movement of said spacing member relatively'tosaid side frames, substantially as described.

2. 'A car truck comprising side frames of the pedestal type, each rovided with a recess and bolster support elow the same, and a truck bolster spacing said side frames having its end portions in each recess of less depth than said recess, resting on said support, and provided wit-h depending lips embracing the same.

3. A car truck comprising side frames of the pedestal type, each provided with a recess and bolster support below the same, and a truck bolster spacing said side frames having itsend portions in each recess of less depth than the same, resting on said support and provided with depending lips embracing the same, said support having upwardly extending shoulders near the base of said recess adapted to center said bolster therewithin.

4. In a pedestal car truck, the combination with side frames each provided with a recess between the journal box guides, and having a supporting cross bar forming the base of the recess, of a truck bolster having its end portions of less depth than the depth of said recesses, and provided with flanges adapted to register with said cross bar.

5. In a pedestal car truck, the combination with side frames each provided with bolster guides, and a support for the bolster connecting the same thereby forming a recess to receive the bolster, of a bolster flexibly mounted in the frames having its end portions of smaller size than said recesses so as to freely enter the same, said bolster guides having lugs at the base thereof extending partway up the sides of the bolster, said bolster forming the only connection be tween said side frames, substantially as described.

A car truck comprising side frames said seats and supporting the frames upon said wheel axles and a single truck bolster spacing said side frames and having a rocka ing bearing on each side frame permitting the vertical rocking of said bolster relative to said frames in a plane at right angles to the planes of said side frames- 7. A car truck comprising side frames, wheel axles joining and su porting the same, each of said frames being provided with a substantially flat bearing surface or seat extending transversely thereof, and a.

spacing member joining said frames and having flexible connectlons therewith comprising a substantially flat bearin face extending longitudinally of the'en s respectively of each spacing member, having shoulders at either end adapted to embrace the sides of the adjacent side frames whereby the spacing member may rock vertically with respect to said side frames and said flat bearing faces will tend to restore and hold the side frames at right angles to the horizontal plane of said spacing member.

In testimony whereof, I the said J OHN M.

HANSEN have hereunto set my hand.

- j JOHN M. HANSEN.

Witnesses; v

ROBERT C. To'rrEN, JOHN F. W111.

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