US1235553A - Brake-beam. - Google Patents

Description

A. CHRISTIANSON.

BRAKE BEAM.

APPLICATION FILEDJULY 25,191 6- Patented Aug. 7, 1917.

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ANDREW CHRISTIANSON, 0F BUTLER, PENNSYLVANIA, ASSIGNOR TO STAND ARD' STEEL CAR COMPANY; OF PITTSBURGH," PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

BRAKE-BEAM.

Patented Aug. #7, 191 7.

Application filed July 25, 1916. Serial No. 111,160.

To all whom it may concern:

Be it known that I, ANDREW CHRIs'rIAN- soN, a citizen of the United States, and resident of Butler, in the county of Butler and State of'Pennsylvania, have invented a new and useful Improvement in Brake-Beams; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relatesto brake-beams, one object being to provide a brake-beam where the brake-heads secured thereto maybe of simple form, and if desired, forged of wrought metal; and another object being to provide a wrought metal, brake-beam strut and lever fulcrum between the compression and tension members. The invention is especially applicable in connection with the brake-beams made of wing bars of the type known as the Davis brake-beam. The in-' vention also involves the formation of the brake-beam member itself.

To these ends, it consists of the combination of a wing-bar member having a compression member and one rib sheared longitudinally from the bar between its ends to form a tension member, and the integral end portions of the bar forged down to substantially solid section, and brake-heads secured to such solid end portions. It also comprises the formation of the brake-beam member itself. It also comprises a brakebeam strut formed of two strips engaging the compression member and lapplng aroimd the tension member and twisted a quarter turn to form the brake-lever fulcrum, said strips being riveted together.

In the accompanying drawing, Figure 1 is a view of the invention, one brake-head being removed from the brake-beam; Fig. 2 is an edge view of the brake-beam, Flg. 3 is a cross section on the line 33, Fig. 1; Fig. 4 is a side or edge view of the brakebeam and Fig. 5 is a cross section of the rolled bar.

The brake-beam member or body 2 1s formed of a wing-bar rolled section, being of the section known as the Davis brakebeam, where three, 3, 4: and 5, of the wings are rectangular, while the fourth wing 6 is bulbous, so that when sheared from the other wings at 6 as illustrated in dotted lines Fig. 5, it is round in cross section. In forming the brake-beam, this wlng-bar is sheared longitudinally between the ends forming the compression member 16 1 com posed of thewings 3,4 and" 5, and the;

round tension member 6 so formed is sepaand forged to solid section as'at 8, preferably to"round section, this being thepreferred form for receiving the brake-heads 10 which brake-heads are thus made of simple form having the sockets 11 fitting'over the solid end portions 8 of the brake-beam body. Such a section can be easily forged and finished so that the whole brake-beam can be made of forged metal. The brakeheads 10 can be held in place by suitable bolts 12 passing through the solid ends 8 and secured in place by pins 13, and also by washers 14 secured in place by the cotter pins 15.

The brake-beam strut 17 can also be made of wrought metal and of simple form, being formed of two straps 18, 19 with the hooked end portions 20 conforming in shape to and engaging the T-shaped compression member 16 of the brake-beam body, and lapping around the circular tension member 6 of said body, and then twisted as at 21, and again lapped as at 22, 23 to form the brake-lever fulcrum 24, having the hole 25 at the end thereof. These two straps 18 and 19 are secured in place by rivets, as at 26 and 27 and in the twisted portions at 28. Thus I am enabled to provide a brakebeam which may be composed entirely of wrought metal, decreasing the weight thereof, and increasing its strength. I also provide a simple, strong connection between the ends of the brake-beam member and the brake-heads, doing away with the compli cated shaped socket corresponding in shape to the wing-bar connecting the brake-heads and brake-beam members, as heretofore employed.

What I claim is:

1. The combination of a brake-beam; formed of a wing-member, having a compression member, and one rib sheared longitudinally therefrom between the ends to form the tension member and the integral endportions forged down to substantially solid section, and brake-heads secured to said solid end portions.

2. The combination of a brake-beam formed of a wing member, having a compression member, and one rib sheared longitudinally therefrom between the ends to form the tension member and the integral end portions forged down to substantially round section, and brake-heads secured to said round end portions.

3. The combination of a brake-beam having a compression member and a tension member, and a brake-beam strut formed of two straps engaging the compression member and lapping around the tension member, and twisted a quarter turn to form the brake-beam fulcrum, said straps being riveted together.

4. The combination of a brake-beam having its compression member of T-shaped section and its tension member of round section, and a brake-beam strut formed of two straps having hooks engaging the T- Gopies of this patent may be obtained for five cents each, by addressing the shaped tension member and lapping around the tension member, and twisted to form a brake-lever fulcrum, said straps being riveted together.

5. The method of forming a brake-beam member, consisting in rolling a wing-bar, shearing the same longitudinally between the ends to form a T-shaped compression member and a separate tension member, and reheating the integral end portions of said bar and forging the same down to substantially solid section to receive the brakeheads.

In testimony whereof, I the said ANDREW GHRISTIANSON have hereunto set my hand.

ANDREW OHRISTIANSON.

Witnesses:

RoB'r. D. To'rTnN, JOHN F. WILL.

Commissioner of Patents,

Washington, D. G.

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