US831581A - Rail-joint. - Google Patents

Description

N0. 831,581. PATENTED SEPT. 25, 1906.

W. P. & S. G. THOMSON. RAIL JOINT.

APPLICATION FILED D110. 28. 1905.

WITNESSES INVENTORS Rm: PETERS cc., wlsmucmu D r:

UNITED PATENT oEEioE.

W'ILLIAM P. THOMSON, OF LANSDOWVNE, AND SAMUEL Gr. THOMSON, OF ALTOONA, PENNSYLVANIA.

RAlL-dOlNT.

Specification of Letters Patent.

Patented Sept. 25, 1906.

Original application filed February 12, 1905, Serial No. 245,683. Divided and this application filed December 28, 1905.

Serial No.

To all whom it may concern:

Be it known that we, WILLIAM I. THOM- SON, of Lansdowne, Delaware county, and SAMUEL G. THOMSON, of Altoona, Blair county, Pennsylvania, have invented a new and useful Rail-Joint, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 and Fig. 2 of the drawings are cross-sections showing different forms of our invention.

Our invention relates to that type of rail-' joints wherein splice-bars are provided with depending flanges which extend below the rail-base, the present application being a division of our application, Serial No. 245,683, iiled February 12, 1.905.

The depending flanges of the splice-bars extend. between the ties and may be of any desired length.

The object of our invention is to increase the moment of resistance and to provide a stifl'er joint and one in which the splice-bars are of such section that they may be readily rolled or otherwise formed; also, to strengthen and improve the shape of the depending flange to prevent buckling under strains.

In Fig. 1 we show the splice-bars 2 as provided with depending inwardly-inclined flanges 3 3, which are gradually increased in thickness toward their lower ends, forming enlargements or heads 4, the increase in thickness being preferably at both sides of the central planes of the flanges.

In Fig. 2 we show the flanges 3 as depending in a vertical direction and as being gradually thickened to form the enlargements or heads 4". In this form the faces of the flanges are shown as being inwardly curved or concave.

The advantages of our invention result from the formation of the enlrrgement or head at the lower portion of the depending flanges by the gradual increase in the thickness of the metal. These heads or enlargements are thus formed with a minimum amount of metal and very lcrgely increase the moment of resistance and give a stifl'er bar for a given amount of metal. The splicebar thus formed has a head along both edges upon the same member, as a T-rail or I- beam, which gives the greatest stifl'ness both vertically and laterally and greatly reduces the liability of buckling under load. The splice-bars are, moreover, of such shape in. cross-section that they may be readily rolled.

Although we have shown our invention as applied to T-rails, it is equally applicable to girder-rails.

l/Vhat we claim is 1. A splice-bar for rails having a freelydepending flange to extend below the base 01' the rail, said flange gradually increasing in thickness toward its lower end.

2. A splice-bar for rails having a freelydepending flange to extend below the base of the rail, said flange being vertical and stiflened at its lower portion and of a different cross-section than that of the splice-bar portion proper.

3. A splice-bar for rails having a freely- (lepending flange to extend. below the base of the rail, said flange having a curvilinear face and stifl'ened at its lower portion by gradually increasing its thickness, uniformly at both sides of its central plane.

4. A splice-bar for rails having a depending flange to extend below the base of the rail, said flange having a curvilinear face and. stifll'ened on the inside at or near its lower enc 5. A splice-bar for rails having a freelydepending flange to extend below the base of the rail, said flange being increased in thickness toward its lower end at both sides of its central plane.

6. A splice-bar for rails having a freelydepending flange to extend below the base of the rail, said flange being thickened toward its lower end uniformly upon both sides of its central plane, and having curvilinear sides.

In testimony whereof we have hereunto set our hands.

WILLIAM P. THOMSON. SAMUEL G. THOMSON. Witnesses as to W. 1?. Thomson:

FEReUs F. INIAOWILKIE, HELEN B. LEnMAN. Witnesses as to S. G. Thomson:

H. H. BAKER, L. B; NOKESTINE.

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