US430756A - Trussed brake-beam - Google Patents

Description

(No Model.) a

H. B. ROBISOHUNG.

TRUSSED BRAKE BEAM. 1 No. 430,756. Patented June 24, 1890.

UNITED STATES PATENT OFFICE.

HENRY B. ROBISCHUNG, OF KALAMAZOO, MICHIGAN, ASSIGNOR TO THE NATIONAL HOLLOW BRAKE BEAM COMPANY, OF CHICAGO, ILLINOIS.

TRUSSED BRAKE-BEAM.

SPECIFICATION forming part of Letters Patent No. 430,756, dated June 24, 1890.

Application filed January 20, 1890- Serial No. 337,524. (No model.)

To all whom it may concern.-

Be it known that I, HENRY B. ROBISOHUNG, a citizen of the United States, residing at Kalamazoo, in the county of Kalamazoo and State of Michigan, have invented certain new and useful Improvements in.Struts or Posts forlrussed Brake-Beams andBushings Therefor; and I hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, wherein Figure 1 is a perspective view of a portion of a trussed brake-beam, the strut or post having my devices applied thereto. Fig. 2 is a plan view of the strut or post and portions of the truss-rod and beam. Fig. 3 is a sectional view of the strut and bushings. Fig. 4 is an end view of the bushing detached; and Fig. 5 is a sectional view of the bushing, Figs. 4 aud o showing the bushing before it has been applied to the strut or post.

' Like symbols refer to like parts wherever they occur.

My invention relates more especially to the construction of struts or posts for trussed beams or like trussed structures used for applying power, and where wear and slack are objectionable features and have to be corrected; but it also embraces certain features of general value where detachable bushings are necessary on moving structures, and where such bushings have to be frequently removed, renewed, and secured against accidental dis placement or loss. In the case of a trussed brake-beam (which has been chosen for purposes of illustration) the strut or post of the trussed structure is slotted or otherwise provided with means for receiving a brake-lever, and has pin-holes or bearings for the pivot of the said lever. As the movement and strain in such structures are continually in one and the same direction, the bearing or pin-hole in the strut or post becomes worn on one side or elongated, so that the lever and its pivot will in course of time have considera ble play, slack or lost motion, which must .be taken up before power can be applied through the beam or equivalent trussed structure. In the case of brake-beams this slack or lost motion is multiplied by the number of beams, and thus increases the distance through which the power mechanism has to move in applying the brakes. In the case of brakes applied by means of a cylinder and piston the movement of the piston is'necessarily limited, and therefore such accumulation of lost motion may resultin practically rendering the brakesinoperative. In the case of trussed structures the present method of repair necessitates the dismemberment of the structures and removal of the entire post. Another difficulty now experienced in the manufacture of trussed brake-beams is the necessity of keeping on hand several sets of patterns for struts or posts to meet the demand for the ditferentsized pivot-pins. To meet and obviate these several objectionable features of the present construction is the object of my present invention; and to this end it consists, first, in combining with the strut or post of a trussed beam or like structure, bushings for the bearings of the lever, pin, or pivot, whereby said bearings may be renewed to take up slack, or changed to suit pivot-pins of difierent size without the necessity of dismembering the structure, and, second, in providing detachable bushings with a projection or lip which may be turned down to lock the bushing in its seat or socket, whereby accidental displacement or loss of the bushingis prevented.

I will now proceed to describe my invention more fully, so that others skilled in the art to which it appertains may apply the same.

In the drawings, A indicates a brake-beam Which occupies the position of the tie-rod in a trussed structure; B, a brake-head; C, the strut or post; D, a truss-rod, and E a brakelover or equivalent lever for applying power to the trussed structure.

The strut or post C is shown as provided at one end with a suitable collar a, through which passes the beam proper A, (or tie-rod,) and at the other with a seat (1 for the truss D. In such structures the strut is commonly provided with a longitudinal slot 0 or equivalent means for the passage of the lever E, the plane of said slot being oblique or angling to the plane of the axis of the beam, so that the brake-lever occupies an inclined position. In said strut or post 0 are pivot-holes or bearings e e for the pivot-pin of the lever E. I form said pivot-holes e e of greater diameter than is necessary to accommodate the largest pivot-pin employed, and provide therefor suitable bushings or bearings G, the inner diameter of which corresponds with the pin to be used. I also provide on the strut or post 0, adjacent to the pivot-holes e 6, undercut shoulders or projections ff, or equivalent means for securing said bushings or bearings to the post 0. These bushings or bearings may be of cylindrical, thimble, or sleeve form, flanged as at g, and provided with a projection or lip h, which can be turned or forced under the shoulder to secure the bushing in the pivot-hole.

For purposes of illustration, I have shown the shoulders f f as straight-edged, and the lips h h as-folded on a straight line, which is one Way of preventing the rotation of the bushings in the pivot-holes; but it is evident that other equivalent constructions for a like purpose will readily suggest themselves to the skilled mechanic.

The trussed beam, of. whatever character or construction it may be, will be formed and set up in the usual manner, and a bushing G, of the desired internal diameter, will then be inserted in the enlarged pivot-holes e e, and secured by folding or bending the lips g g under the shoulders f f. WVhen the bushings G have become so Worn as to allow of slack or lost motion, the lips g 9 maybe turned back or broken off, and the old bushings removed and replaced by new ones without dismempossibility of dispensing with a number of patterns in casting the struts or posts, and the ability to fit up or changea beam or supply it at once with any diameter pivot-pin called for by the specifications of the can builder.

Having thus described the nature and advantages of myinvention, What I claim, and desire to secure by Letters Patent, is-

1. The combination, with the strut or post of a trussed brake-beam, of bearings 0r bushings for the lever-pivot holes thereof, substantially as and for the purposes specified.

2. The combination, with the strut or post of a trussed brake-beam, of removable bearings or bushings for the lever-pivot holes thereof, substantially as and for the purposes specified.

3. The combination, with abearing or pivothole having a rectangular shoulder adjacent thereto, of a detachable bushing having a rectangular lip or projection adapted to look under the said shoulder, substantially as and for the purposes specified.

In testimony whereof I affix my signature, in presence of two witnesses, this 9th day of J anuary, 1890.

HENRY B. ROBISCHUN G.

Witnesses:

E. B. LEIGH, W. F. MACGINNLTIE.

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