US11337A - Railroad-cab - Google Patents

Description

2 Sheets Sheet 1.

A. SN YDER.

Car Truck,

Patented July 18. 1854 AM. PHDT -L ITHO. CU. N.Y (USBORNE'S J'ROCESS.)

' 2 Sheet-Sheet 2. A. SNYDER.

I Car Truck.

No. 11,337 Patented July 18. 1854 AM. PHOTO-LITHO. C N.Y. GSBORNE'S FRUCESS.)

ABRAM SNYDER, OF HAVVLEY, BNNSYLVANIA.

RAILROAD-CAR TRUCK.

specification ofLetters Patent No. 11,337, dated July 18, 1854.

To all whom it may concern Be it known that I, ABRAM SNYDER, of

Hawley, in the county of Wayne and State of Pennsylvania, have invented certain new and useful Improvements in Railroad-Cars, of which the following is a full, clear, and eXact description, reference being had to the accompanying drawings, which .form part of this specification, and in which Figure 1 represents a top view of the car showing the position which theseveral parts respectively occupy when the car is running on a curve; Fig. 2 a bottom view of the car in which the parts occupy the rela live positions which they assume in running on a straight line; Fig. 3 a longitudinal section of the car at the line w w of Fig. 2; Fig. 4 a transverse section at the line X X of Fig. 2; Fig. 5 a top View of one of the notched coupling disks; Fig. 6 a. perspective view of thesame, by the pressure of the load upon which a tendency is given to the three pairs of wheels to run upon the same straight line; and Fig. 8, a side elevation of these disks partially turned as when the cars are running on a curve.

The truck represented in the accompanying drawings has three pairs of wheels A, B, and C, respectively mo unted in a frame D, E, and F. These frames are connected to each other and to a frame Gr, upon which the car body is supported in such manner that the three pairs of wheels can move either laterally or up and down to accommodate themselves to horizontal or Vertical curves of the track, and as changes of this kind vary the distance between the several pairs of wheels, a system of levers and connecting rods is not adapted to operating brakes on such wheels, as they do not compensate for variations in the distance between them, I have therefore adapted a system of cords (a and pulleys (Z2) to actuate the brakes H) of these wheels by which I am enabled to surmount all the dif ficulties incident to the use of levers and links.

The frames (D and F) of the front and rear pairs of wheels are each fitted with a pair of strong perch bars and 2') which terminate in coupling plates (m) which are connected by a ball and socket joint, which in addition to allowing flexure in every direction, will also admit of the bars and i) approaching and receding from each other to 'permit the several pairs of wheels freely toconform to the curved and straight portions of the track.

The coupling plates of both the front andrear trucks rest upon the cross bars of the frame (E) of the middle wheels (B) with which frame they are connected by several pins (92-) each passing loosely through a pair of fluted coupling disks (0, 0") which match into .and are the counterparts of each other. The upper disk "(0) of each pair is formed on or secured to the under side of the plate (m) which formsthe junction of the porch bars (21), and the lower disk (0) of each pair is formed on or se cured to theoross bar ofthe frame (E) of (the middle wheels. It is plain that the disks (0, 0) can not turn on each other to permit the wheels to conform to a curve, without tending to separate or expand as shown in Fig. 7 This tendency of the disks to separate is resisted by a spring of india-rubber or other spring (7), placed between the cow pling plate (m) and the nut on the end of the swivel bolt, and the instant the wheels pass any object which either raises or defleets them from a straight line, this spring as well as the weight of the parts resting upon the upper disk will tend to cause the faces of the protuberances of the upper disk to slide down the faces of the indentations in the lower disk to bring the wheels again into line, in this way the oscillating motion from side to side of the track which a too free turning of the disks upon each other would cause is avoided.

A beam (N) is secured across the perch bars (2' and z") of the front and rear frames (A and C) at a point between the axis of the end and middle wheels upon these cross beams (N) the frame (G) is supported and is securely connected with these beams by means of swivel pins (.9) which pass through coupling plates (t) that permit the wheel frames to turn freely beneath this top frame and as the coupling plates (t) protrude from the cross bars to which they are attached the upper and under frames may respectively rock to permit any one of the wheels to rise over an obstruction without disturbing the others. By placing the cross beams (N) farther toward the axis of the.

middle wheels (B) a larger proportion of the load will insist upon the middle wheels and by moving the beams in the opposite direction a larger proportion of the load will be thrown upon the end wheels.

The brake beams (H) are suspended by cords or links from the frames of the wheels and the middle of each beam is fitted with a sheave (41) such as are commonly used for blocks and tackle. The brake beam at the end of the car opposite that at which the brake is worked is fitted with two sheaves. A cord (01,) of suitable strength is taken and a sufficient length at the end (af) at which the brakes are to be operated is left protruding from the brake bar; the opposite end is then passed round the sheave o thence round '0 thence round 0*,thence round 1: and m whence it is carried round 4)", thence round v and back by the opposite side of the pulley to that at which it passed at the commencement, when it terminates at a and is spliced to the cord a, and the end a is carried to a Windlass or other contrivance for windlng it up and letting it out again.

It is plain that by winding up the cord' (a the brake beams (H) of each pair will be caused to approach each other and cause their shoes v(it) to clasp the wheels with a of a long one, and it is also obvious that all the parts of my improvements may be employed in connection or separately as may be deemed expedient.

What I claim'as my invention and desire to secure by Letters Patent is Making the bearing surfaces of the disks on which the load swivels and is supported of an undulating form substantially asdescribed.

In testimony whereof, I have hereunto subscribed my name.

ABRAM SNYDER.

Witnesses:

P. H. WVATsON, P. HANNAY,

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