US405358A - Support for beams or girders - Google Patents

Description

(No Model.) 2 Sheets-Sheet '1.

P. H. JACKSON.v SUPPORT FOR BEAMS 0R GIRDgRS.

No. 405,358. Patented June 18. I889.

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(No Model.) 2 Sheets-Sheet 2. P. H. JACKSON.

SUPPORT FOR BEAMS 0R GIRDERS.

No. 405,358. Patented June 18, 1889.

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. UNITED STATES IATENT OFFICE.

PETER H. JACKSON, OF SAN FRANCISCO, CALIFORNIA.

SUPPCRT FOR BEAMS OR GIRDERS.

SPECIFICATION forming part of Letters Patent No. 405,358, dated June 18, 1889.

Application filed February 19, 1889- Serial No. 300,453. (No model.)

To all whom it may concern.-

Be it known that 1, PETER H. JACKSON, of the city and county of San Francisco, State of California, have invented an Improvement in Supports for Beams or Girders; andI hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to improvements in supports forbeams or girders, and it is more especially applicable in theconstruction of supports similar to those shown in a patent issued to me January 1, 1884, No. 291,192.

My invention consists in such a construction that I am enabled to dispense with holes (which it was formerly necessary to make) through the beams and diaphragms, and by this construction I avoid the time and expense of handling and transporting these heavy beams from the rolling-mill or place of manufacture to the place where they are to be punched to prepare them for being put together. 7

Referring to the accompanying drawings for a more complete explanation of my invention, Figure 1 is a transverse section taken through 00 y of Fig. 3. Fig. 2 is a section taken through or a, Fig. 1. Fig. 3 is a plan. Fig. 4c is a vertical cross-section showing three beams. Fig. 5 is a horizontal section taken through is Z of Fig. 4. Fig. 6 is a plan view of the structure shown in Figs. 4 and 5. Fig. '7 is a vertical cross-section showing a single beam and girder with clamping-plates on Fig.8 is a section taken through .2 z of Fig. 7. Fig. 9 shows a screwbrace for the girder in place of cams or wedges.

A A is the girder, which may consist of 011e, two, or more beams, and B is the beam abutting against the girder.

C C are independent metal plates extending across the girder and also over the end of the beam 13, above and below, and D are iron bolts which clamp the plates, the girder, and beams together by means of nuts which screw upon the lower or upper ends of the bolts.

E E are cams or wedge-pieces which abut against the bolts D at one end, while the other ends press against the sides of the beams forming the girder A and force the beams together, firmly holding the webs or diaphragms of the beams in position to prevent any lateral movement. It will be seen by the section- Fig. 2 that these cams may be forced against the girder-beams with any needed pressure, or, if desired, they. may be so constructed as to swing into line between the bolts' and the webs of the girder, and wedges may then be driven in to obtain the desired pressure. The lateral movement of the beams is thus prevented, while the plates abeve and below with their connecting-bolts prevent any vertical movement.

The weight of the beam B, abutting against the side of the girder A and resting in the socket formed by the top and bottom plates C O and the bolts at the side of the girder, is supported the same as if the beam were laid over the top of all the beams composing the girder.

At the point where the ends of the beams of one girder join or meet with those of the next a diaphragm Gis introduced, which prevents the ends from slipping past each other; and in order to hold these ends together and prevent their drawing apart the boltrholes through the top and bottom plates 0 are so made that about half their diameter overlaps the edges of the flanges on the girder-beams. The portion which is thus overlapped 1 chip out with a cold-chisel or other suitable tool on both top and bottom flanges, forming a section of a circle which corresponds with that of the bolt-holes in the plates above and below. The bolts then passing through the plates lie in these semicircular notches, half of the diameter of the bolt fitting into these notches, and they thus act to lock and hold the beams and prevent any pulling strain from separating the ends, as is shown especially in sections Figs. 2, 5, 6, and 8.

In order to hold the tail-beams B in the sockets formed by the top and bottom plates and bolts at the side of the girder, the sockets may be filled between the plates and around the end of the tail-beam and bolts on the line with their outside with Portland cement, concrete, and broken stone or brick or any other plastic material which will harden and cement the whole.

It will be manifest that, if desired, a screw E, Fig. 9, could be applied in place of the cams or Wedges which press against the girder-beams, as previously described; but by the use of the cams, eccentrics, or wedges set in such a position that any tension which 5 would act to draw the beams apart would serve to tighten the locking-wedges the most satisfactory result is obtained.

It will readily be seen that the beams may be sent from the rolling-mill or other place of manufacture directly to the building where they are to be used, and may be set up in place without any drilling or punching, and after being set up the semicircular notches may be cut out of the flanges to correspond with I 5 the holes in the top and bottom plates 0, and the bolts then being put through the plates and the nuts screwed up tight, the whole of the beams will be locked together without f u rther work.

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

1. A girder composed of two or more metallic beams and an abutting beam or beams,

2 5 independent metallic plates extending across the girder and above and below the abutting beam or beams, and clamping-bolts or means for securing the end of the abutting beam or beams and the plates together, in combina- 0 tion with wedges or cams whereby pressure is applied laterally to the girder-beams, substantially as described.

2. A girder composed of one or more metallic beams and the abutting beam orbeams,

independent metallic plates extending across 3 5 the girder above and below the abutting beam or beams, and clamping bolts extending through the top and bottom plates upon opposite sides of the girder-beam, in combination with cams or Wedges exerting a lateral 4o pressure upon oneeside of the girder-beam, and a resistant consisting of the clampingbolts upon the opposite side, substantially as described.

3. A girder composed of ametallic beam or beams and an abutting beam or beams, the independent metallic plates extending above and below the girder and abutting beams, and the clamping bolts passing through said plates and also through recesses formed in the flanges of the beams, whereby the beams are held in position between the clampingplates, substantially as described.

4. A girder consisting of a metallic beam or beams and an abuttingbeam orbeams, the independent metallic plates extending above and below the girder and abutting beams, and the clamping bolts and nuts, in combination with a filling of a plastic material which will set or harden around the ends of the abut- 6o ting beams and the bolts between the plates, substantially as described.

In witness whereof I have hereunto set my hand.

PETER H. JACKSON.

Witnesses:

S. H. NoURsE, H. 0. LEE.

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