US549021A

US549021A - Brake-beam

Info

Publication number: US549021A
Authority: US
Publication date: 1895-10-29
Anticipated expiration: 1912-10-29

Description

(No Model.) Y

H. B. ROBISGHUNG.

BRAKE BEAM.

No. 549,021. Patented 001;. 29,1895

UNrrnD STATES PATENT Fries.

HENRY B. ROBISCHUNG, OF KALAMAZOO, MICHIGAN, ASSIGNOR TO THE CHICAGO RAILWAY EQUIPMENT COMPANY, OF CHICAGO, ILLINOIS.

BRAKE-BEAM.

SPECIFICATION forming part of Letters Patent No. 549,021, dated October 29, 1895 I Application filed March 26,189'ir serial 1101 505,164. (No model.)

To all whom it may concern.-

Be it known that I, HENRY B. ROBISCHUNG, a citizen of the United States, residing at Kalamazoo, in the county of Kalamazoo, State of Michigan, have invented certain new and useful Improvements in Brake Beams; and I hereby declare the following to be a full, clear, and exact description of the same, reference being bad to the accompanying drawings, wherein Figure 1 is a top plan view of one end ofa trussed brake-beam, the brake-head and collar-partly in section to show my improvements in method of securing the head to the beam. Fig. 2 is a central section on the line on as, Fig. 3. Fig. 3 is an end view of the beam with head attached, the tension member or truss-rod of the beam broken away. Fig. 4 is a central section of the collar, brake-head, and end cap or sleeve separated on the axial line of the compression member of the beam. Fig. 5 is an end view of the end cap or sleeve. Fig. 6 is an end viewof the collar. Fig. 7is

a sectional view of the head and collar, show ing my improved construction applied directly to the end of an ordinary beam, and also a slight modification in the construction of the head with the bearing-flange therefor on the beam.

Like symbols refer to like parts wherever they occur. 7

My invention relates to the construction of brake-beams in general, and has for its main object to permit an automatic endwise or axial movement of the head on the beam to ease the shock on the head and shoe, due to lateral (or axial) vibration of the beam in curving and under other conditions arising in the use of brake-beams and brake-heads, and also to relieve the flange of the wheel from shock and undue frictional wear; and it has for its secondary object to permit the rotary automatic adjustment of the brake-head to meet any changes in the relation of the brakehead (or brake-shoe) to the wheel, whether the same be due to tilting of thetruck, change of load,change of position of beam to the line of draft, difference in height of beam above the track, (or hanging of beam,) or from any other of several causes well understood b those skilled in the art.

To this end the main feature of my invention consistsin the combination, with a brakebeam, of an automatically-yielding brakehead capable of longitudinal'or axial niovement on the beam to ease the shock due to lateral or axial vibration of the beam.

A second feature of my invention consists in the combination, with a brake-beam having a journal end, of a yielding brake-head capable of rotary and axial movement on the beam, whereby said head can accommodate itself automatically to change of relation of the brake-head (or brake-shoe) to the wheel, as well as to lateral or axial vibration of the brake-beam.

There are other minor features of invention, all as will hereinafter more fully appear.

For purposes of illustration I have chosen to. show the present invention in connection with a trussed brake-beam and an end cap commonly used in connection with hollow beams; but I wish it to be understood that the beam need not necessarily be a trussed structure, nor need an end capbe used, as the particular construction hereinafter specified for the end cap may be formed on or made integral with the end of the brake-beam.

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

In the drawings, A indicates the compression member (or beam proper); B, the tension member, and O the end cap or sleeve of a trussed brake-beam, the compression and tension members A B being united with each other and with the end cap 0 by inserting the end of the compression member A into the end cap C, passing the threaded endof the tension member B through the end cap 0, and adjusting and securing the'parts by a nut c in the usual manner, so that the end cap to all intents and purposes may be considered as a permanent part of the beam proper. This end cap 0 is formed at its inner end with a bearing-fiange 1 for the brake-head D to limit the inward movement ofsaid head, and in the case of a common beam (see Fig. 7) said flange may be a collar formed with or shrunk on the structure. In either case it may be beveled, as at 1, Fig. 7, which will serve to keep out dust and also prevent any lodgment of dust or matter which might prevent the brake-head from resting directly on the bearing-flange 1.

The outer end of cap 0 is provided with a cotter-hole and cotter 2, or equivalent means of securing to the end of the beam an end collar or annulus 3.

The brake-head D, which may be of any approved form, has a suitable opening 4, by which it is applied to the end of the brakebeam, and its inner cross-section exceeds the cross-section of the beam, or other provision is made to house a longitudinally-acting spring or equivalent means for holding the head D up against the bearing-flange 1 with such elastic or yielding pressure as will permit of its movement in the axial line of the beam under sudden shocks, such as the vibration of the beam on an irregular track or in rounding curves.

When, as in the present instance, a rotary motion of the head is desired, the end of the beam or the end cap is of cylindrical crosssection to form a journal, and the opening 4 of the head is of similar cross-section, though of increased diameter to accommodate a spring of spiral form, and is also provided at its inner side with an inwardly-projecting flange 5, which forms a seat or hearing for the spring 6.

6 indicates a spring or equivalent means for seating the head with a yielding pressure, which, if of spiral form, will encircle the journal end of the beam or cap 0, bearing at one end on the flange 5 of the brake-head D and at the other on a collar or annulus 3, which annulus is of less diameter than the opening 4 of the brake-head and is adapted to enter the outer end of the brake-head opening 4 and confine the spring 6, said collar 3 being secured to the end of the beam or cap 0 by a cotter-pin 2 or in other suitable manner. This spring 6 will under any circumstances be of sufficient power to hold the brake-head to its seat on flange 1 under ordinary conditions, and in case the end of the beam is of journal form said spring 6 will be of force sufiticient to exert a pressure and friction on the inner flange 5 of the brake-head to prevent the tipping or rotation of the brake-head by gravity or other accidental force.

The sleeve or end cap 0 (or end of the beam) and the brake-head D being constructed substantially as hereinbefore specified, the head is placed on the cap or end of the beam. The spring 6 is then slipped over the end of the beam within the cavity4= of the head and with its inner end resting on flange 5. The collar 3 is then placed on the end of the beam with its inner end resting on the outer end of spring 6 and compressing the same, and is finally secured to the end of the beam by the cotter 2 or in other suitable manner.

When the parts are thus constructed and combined, the head will be at liberty to yield in the axis of the beam to accommodate any lateral Vibration of the beam and ease both the shoe or head and the wheel-flange, and it will also be at liberty to rotate automatically to adjust itself to any change in the relation of wheel and brake-head, retaining the lastnamed adjustment until the same shall be again altered by the altered relation of wheel and brake-head.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. The combination with a brakebeam of an automatically yielding brake-head arranged to move laterally or in the axial line of the beam, substantially as and for the purposes specified.

2. The combination with a brake-beam of a laterally movable, automatically yielding rotatable head, journaled on said beam, substantially as and for the purposes specified.

3. The combination with a brake-beam, of a spring supported axially movable brake-head, substantially as and for the purposes specified.

4:. The combination with a brake-beam, of a laterally or axially movable brake-head, and a spiral spring housed within the brake-head, substantially as and for the purposes specified.

5. The combination with abrake-beam, of a lateral oraxially movable and rotatable brakehead journaled on the beam, and a spiral spring housed within the brake-head, substantially as and for the purposes specified.

6 The combination with a brake-beam having a journal end, of a brake-head journaled thereon, and having an inwardly projecting flange, a spiral spring housed within the head and encircling the journal end of the beam, and an annulus orcollar of less diameter than the opening of the brake-head which annulus is arranged to bear on the outer end of the spiral spring and is secured to the end of the beam; substantially as and for the purposes specified.

In testimony whereof I affix my signature, in presence of two witnesses, this 22d day of March, 1891.

HENRY B. ROBISCl-IUNG.

Witnesses:

E. BJLEIGH, E. T. WALKER.

IIO