US993574A - Trussed-beam construction. - Google Patents

Description

E. C. COVERT. TRUSCBOBEAM CONSTRUCTION.

APPLICATION FILED MAY 12, 1010.

Patented May 30, 1911.

INVENTOR.

p "1b all whom it may concern:

New Kensington,

1 ED srn'rns PATENT onmon.

EDSON' C. COVERT, OF NEW KENSING'ION, PIE,NNSYIIV'ANIA.

TRUSSED-BEAJI CONSTRUCTION.

Specification of Letters Patent.

Patented May 30,1911.

Application filed May 12, 1910. Serial No. 561,022.

'Be it known that I, EDSON C. Covmrr, of county of Westmoreland, and State of Pennsylvania, have invented certain new and useful Improvements in Trussed-Beam Construction, of which the following is a full, clear, and exact description, reference being had to the accompanystresses to which these beams are subjected,

cambering and wall-collapsing with their I consequent destruction of the truss integrity.

In the accompanying drawings my invention is shown as applied to a brake beam although it will be apparent to those skilled in the art that it is applicable to body and truck bolsters.

Figure l is an elevational view of my improved beam; Fig. 2 is a sectional view taken 'on the line 22 of Fig. 1; Fig. 3 is a section taken on the line 3--3 of Fig. 1, and illustrating one manner of'forming the compression member from a rolled conventional channel section; and Fig. 1 is an elevational view of the inside face of the brake shoe head and showin recessed seat for the re ception of the en of the compression memher.

In the-brake beam shown, the reference numeral 2 indicates the U-shaped compression member, 3 the tension member, 4 the strut, and 5 the brake shoe heads; the brake shoe heads being of the type generally identified with the National hollow and Creco brake beams.

In-carryin out my invention I so form the U-shape compression member 2 as to provide the oppositely disposed edge flanges 6 which lie preferably in the same plane, and project in opposite directions, as shown in Fig. 3. These flanges strengthen the member at this point where there is a tendency. of deflection or collapsing of the wall 7 enabling the beam to withstand the maximum stresses to which it is subjected. A

more 131%1d mounting of the brake head 5 is also '0 tainable by my improved construction of the compression member, the projecting flanges 6 taking appropriate recessed seats 8 in the brake heads, serving efi'e'ctually to prevent working of the head on the beam. In Fig. 3 is shown the preferable manner of forming this compression member 52. I take a conventional channel section 9 of suitable dimensions for the beam construction contemplated and then by) ing or pressing bend the web portion t ereof to the U-shape shown and cause-the flanges 6 to project outwardly in opposite directions and in preferably the same plane. The

channel may be heated before the bending operation, or bending may be done without heatin as desired, and the member may be forme to the desired length, either before or after shaping.

The cross sectional distribution of material in the ordinary commercial or conventional rolled channel section renders it peculiar] adaptable to the formation of my improve form of compression member; the

metal lying within the zone of the flanges so 6 being somewhat thicker than the web or body portion 9, thus enabling these flanges 6 to effectually resist collapsing of the walls of the member. This cross sectional distribution of themetal not only enables the wall 7 to withstand collapsing but alsoimparts to the compression member a general rigidity which enables it to resist deflection or cambering of the beam as, a whole on the line of draft of the beam.

The advantages of my invention will be appreciated by those skilled in the art. In my improved beam there is presented a construction capable of receiving without de flection, maximum loads with a minimum amount of metal.

As stated above, while-I have shown and described my invention as applied to a brake beam, it also may be applied to body bolsters and truck bolsters, in which latter cases the members 5 would take the form of a spring seat casting or the like.

It will be apparent that other changes may be made in my improved beam construction without departing from the spirit.105

of my invention.

What I claimand desire to secure by Let ters Patent is:

1. .A. compression member for trussed beams, embodying a conventional rolled 110.

channel section having its web portion substantially U-shaped.

roll- 5 a 2. A compression member for trnssed beams embodying a conventional rolled channel section having its web portion substantially U-shaped and its flanges projecting opposite directions.

3. "A compresslon member for trussed beams, comprising a conventional rolled channel section having its Web portion subtially U-shaped in cross section .and having an angularly disposed edge flange tapering the same plane and projecting inopposite -beams,compris ing a body portion substan- 1 outwardly in cross section.-

5. A compression member for. trussed I vbeams, comprising a body portion'substan tially U-shaped-in cross section and having anangularly disposed edge flange of greater thickness than the-body portion and tapering-outwardly in cross section;-

6. A compression member for trussed beams, comprising a body portion substantially U-shaped in cross section and having: an angularly disposed edge flange joinedthereto by a fillet of greater thickness-than the body portion.

7 In a trussed beam, the combination of a compression member substantially U- shaped in cross section and having an outwardly disposed edge flange adjacentthe ends thereof, a tension member and brake shoe heads carried by the compression and tension members and having recess ed seats adapted to receive the respective flange'ends of the compression member. p

In testimony whereof, I have hereuntoset my hand.

EDSON o COVERT.

Witnesses I PETER H. MURPHY, M. ARTHUR KELLER.

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