US2946410A

US2946410A - Brake beam structure

Info

Publication number: US2946410A
Application number: US513235A
Authority: US
Inventors: Irvin J Spaeth
Original assignee: Chicago Railway Equipment Co
Current assignee: Chicago Railway Equipment Co
Priority date: 1955-06-06
Filing date: 1955-06-06
Publication date: 1960-07-26
Anticipated expiration: 1977-07-26

Description

July 26, 1960 J. SPAETH BRAKE BEAM STRUCTURE Filed June e, 1955 2 Sheets-Sheet 1 F G l l4 4 \5 D L J J/ 2* 8 F|G.| z

July 26, 1960 J. SPAETH 2,946,410

BRAKE BEAM STRUCTURE Filed June e, 1955 2 Sheets-Sheet 2 FIGS fflI jF 37d e V 37d United States PatentD BRAKE BEAM STRUCTURE Irvin I. Spaeth, Chicago, 11]., assignor to Chicago Railway Equipment Company, Chicago, 11]., a corporation of Illinois Filed June 6, 1955, Ser. No. 513,235

3 Claims. (Cl. 188219.'6)

The invention relates to railway truss type brake beams on which an end member is seated and interlocked by a detachable element so as to prevent movement of the end member off of the beam. Preferably the end member comprises a replaceable brake head upon which a renewable shoe is separately secured.

The objects of the invention are to utilize an end member with an integral pocket and through passage for receiving the end portion of the beam and to detachably, but firmly, secure the end member on the beam by a removable securing means.

These objects are attained by the structure illustrated in the accompanying drawings, in which:

Figure 1 is a plan view of a beam of the type described with one end of the beam being sectioned horizontally on a plane indicated by line 11 of Figure 2.

Figure 2 is a vertical transverse section taken on the line 2-2 of Figure 1 and drawn to a larger scale.

Figure 3 is a horizontal section corresponding generally to the sectioned portion of Figure 1, but showing the parts in a position during assembly and before they are related as shown in Figure l.

Figure 4 is a detail section corresponding to the right hand end of Figure 1, but illustrating another form of the form of the invention. The figure is, a section on line' 6-6 of Figure 7.

Figure 7 is a vertical transverse section on the line 7--7 of Figure 6.

Figure 8 is a detail of the retaining device shown in Figures 6 and 7.

Figure 9. corresponds to Figures 4'and 6 but illustrates another form of the invention. The figure is, in part, a section on line 9-9 of Figure 10.

Figure 10 is a vertical transverse section on the line 10-10 of Figure 9.

The beam shown in Figures 1-3 includes a compression member 1, a tension member 2, a strut 3 holding the intermediate portions of the compression and tension members apart, the members converging at each end of the beam and there connected by a rivet 4 and forming a seat for an end member here shown as a brake head 5..

Brake head has a through passage 6 slidably receiving the end portion of the beam. Passage 6 is formed by a top wall 7, a bottom wall 8, a-front wall 9, and a rear wall 10. These Walls are integral parts of the end member. Compression member 1 is of a channel cross section with its main web 1a upright and its flanges 1b disposed horizontally. Tension member 2 is of rectangular bar section. Flanges 1b are provided with recesses 11, ex tending transversely of the beam and spaced inwardly from the end of the beam and including shoulders 11a facing towards the middle of the beam. Forward wall 9 on end member 5 is provided with shouldered projections Patented July-26, 1960 9a extending transversely of the beam and adapted to seat in recesses 11 when the end member has been moved lengthwise of the beam until the projections 9a are abreast of the recesses 11, whereupon the end member may be moved transversely of the beam into the position shown in Figure 1.

The end member is here moved rearwardly of the beam by a spring key 12 retained in place by a cotter 13. The width of passage 6 exceeds the width of flanges 1b plus the depth of projection 9a so that when the parts are in the position shown in Figure 3, the end member may be moved freely onto and off of the seat formed on the main longitudinal members. The inner side of the end member is inclined at 14 to abut against the inclined outer face of tension member 2, as indicated in Figure 1, and is held in this abutting position by key 12. 9 abuts against the forward face of the end part of tension member 2. Wall 9 is recessed as indicated at 9b to slidably receive the forward head 4a of rivet 4.

In Figures 4 and 5, the compression member 21 and tension member 22 are similar to the corresponding parts in Figures 1-3. The rivet 24, securing the end portions of the compression and tension members together, has a shouldered head 24a projecting transversely of the beam from the front face of the tension member. The brake head end member 25 is recessed at 26 to receive rivet head 24a when the parts are in the position shown in Figure 4 and the inner end of recess 26 forms a shoulder 26a to oppose the rivet head lengthwise of the beam so as to resist movement of the head from the beam. The head is applied to the beam, as indicated in Figure 5, similar to the application of the head previously described and removable key 27 retains the head in position on the beam with rivet head 24a in recess 26.

Figures 6, 7, and 8 illustrate .a structure similar to that shown in Figures 4 and 5, but the brake head end member 35 is seated solely'upon the end portion of tension member 32, which is parallel to the web of,

key' 37 is bifurcated to form itongues 37a which are spaced apart and receive between them the rear head 41 of rivet 38.

Figures 9 and 10 illustrate another form of the invention in which a one piece casting forms compression member 42 and tension member 43 and the end seat member 44, which is provided with a recess 45 adapted to receive a projection 46 on the brake head 47. Also, the seat member 44 has forward projections 48 adapted to receive them the full width of the brake head wall 49. A narrow key 50 is received in a recess 51 in the rear face of the beam and retains the beam parts in assembled position.

In each form of the invention, there are relatively movable parts, one of which is provided with a projection extending transversely of the beam and receivable in a corresponding recess in an opposing member and retained in shouldered relation to each other to prevent removal of the end member longitudinally of the beam.

The details of the structure may be varied without departing from the spirit of the invention and the exclusive use of those modifications coming within the scope of the claims is contemplated.

At the same time, the outer edge 15 of front wall What is claimed is:

1. In a railway truss type brake beam including a compression member of channel cross section and a tension member of the bar cross section, said members being spaced apart'at the middle of the beam and converging toward. each other at the end of the beam with the end portions of the bar section received between the flanges of the compression member and con tacting end portions of the compression member web and having hook-like ends overlapping the extreme ends of the compression member, a rivet extending through said end portions at, each end of the beam transversely of the length of the beam and permanently securing said end portions tightly together, said end portions forming a seat part integral with the remainder of said members, a head of said rivet projecting from the forward face of said tension member and the other head of said rivet projecting from the rear face of said compression member, a separate brake head part having a transverse passage slidably receiving said seat part and first mentioned rivet head when moved lengthwise relative of each other, there being a pair of spaced shoulders defining a recess on the inner face of one wall of said transverse passage adjacent said first mentioned rivet head when said parts are in a predetermined relative position lengthwise of the beam, said head part transverse passage having upper and lower walls provided with substantially aligned vertical openings and a separate retaining means comprising a bifurcated spring key with spaced tongues insertible downwardly at opposite sides of the second mentioned rivet head in said openings and bowed transversely of the beam to bear against said parts and to shift said parts transversely of the beam when said parts are in said relative position and thereby position said first mentioned rivet head in said recess and between said shoulders to positively retain said brake head part against movement lengthwise of said seat part.

2. In a railway truss type brake beam including a compression member of channel cross section and a tension member of bar cross section, said members being spaced apart at the middle of the beam and converging toward each other at the end of the beam with the end portions of the bar section received between theflanges of the compression member and contacting end portions of the compression member web and having hook-like ends overlapping the extreme ends of the compression member, a rivet extending through said end portions at each end of the beam transversely of the length of the beam and permanently securing said end portions tightly together, said end portions forming a seat part integral with the remainder of said members, a head of said rivet 4 projecting from the forward face of said tension member, a separate brake head part having a transverse passage slidably receiving said seat part and rivet head when moved lengthwise relative of each other, there being a pair of spaced shoulders defining a recess on the inner face of one wall of said transverse passage adjacent said rivet head when said parts are in a predetermined relative position lengthwise of the beam, said head part transverse passage having upper and lower walls provided with substantially aligned vertical openings and a separate retaining means comprising a spring key insertible downwardly in said openings and bowed transversely of the beam to bear against said parts and to shift said parts transversely of the beam when said parts are in said relative position and thereby position said rivet head in said recess and between said shoulders to positively retain said brake head part against movement lengthwise of said seat part.

3. In a railway truss type brake beam of built-up construction including a compression member and a tension member, said members being spaced apart at the middle of the beam and converging toward and contacting each other at the end of the beam, a rivet extending through the contacting portions of said members at each end of the beam with the rivet heads directly engaging and gripping the compression member and tension member respectively, a separate brake head detachably mounted on the portions of the compression and tension members at each end of the beam which are secured together by said rivets, one head of said rivet projecting from the forward face of said tension member, said brake head having a recess receiving said projecting rivet head when the head is in functioning position on the beam and opposing the rivet head lengthwise of the beam to resist movement of the brake head along the beam when said rivet head is in said recess, and a detachable key seated in each brake head and bearing against the rear face of the compression member and holding the brake head on the beam in position with the rivet head and brake head recess in the retaining position.

References Cited in the file of this patent UNITED STATES PATENTS 884,445 Williams Apr. 14, 1908 949,892 Harrison Feb. 22, 1910 955,239 Williams Apr. 19, 1910 996,584 Hoffman June 29, 1911 1,593,765 Huntoon July 27, 1926 2,329,247 Busse et al Sept. 14, 1943 2,493,913 Busch Ian. 10, 1950 2,613,767 Stillwagon Oct. 14, 1952 2,826,279 Busch Mar. 11, 1958