US19945A - Kigidly the ends of metal beams - Google Patents

Description

UNITED STATES PATEN OFFICE.

SAMUEL NOIVLAN, OF NEIV YORK, N. Y.

CONNECTING RIG-IDLY THE ENDS OF METAL BEAIVIS.

Specification of Letters Patent No. 19,945, dated Apri] 13, 1858.

To all whom 'it may concern:

Be it known that I, SAMUEL NOWLAN, of the city, county, and State of New York, have invented certain new and useful Im.- provements in the Method of Jointing or Connecting and Securing the Ends of Metal Beams Together for Building and otherl Purposes; and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings and to the let-ters of reference marked thereon.

The nature of my invention consists in connecting metal beams together by inserting the tongue in the end of one beam into the mortise in the end of its connecting beam and securing the tongue in its position in the mortise, and the beams together by pouring molten metal between the tongue and the mortises to ll the space left between them for that purpose.

Figure l in the accompanying drawings is a perspective View of the mortised beam and Fig. 2 a similar view of its connecting tongued beam. Fig. 3 is a vertical longitudinal section of the beams jointed together, taken through the center of their width and Fig. 4 is a perspective view of the beams jointed together.

A is a section of a cast-iron beam to be applied to building, bridge or other purposes, having upon each of its ends the tongue or tenon B, or having a tongue at one end and a mortise at the other, or having a tongue only at one end as the position -or the purpose to which the beam is to be applied requires. The end (or ends) of the beam has bracketed enlargements projecting above its upper and belowits lower face to meet and fit similar projections upon the mortised beam hereinafter described.

B is a tongue or tenon projecting from the end of, and castwith, the body of the beam, and of a size proportioned to the size of the beam and to the pressure or strain to which the beam is to be subjected. It is made tapering from its base to its end so as to bring its greatest strength and support at its base, and has a projecting catch C upon` its upper side at the end which forms a locking piece to hold the beam from spreading laterally from its connecting beam before the beams are secured together and also to effect the same purpose after the beams are secured together as hereinafter described.

D is a section of a beam of similar eX- ,ternal form to the one before named, but

having a mortise or aperture E formed or cast in either or both of its ends to receive the tongue of the beam A. This mortise has a recess at the upper part of inner end fitted to receive and hold the projection C of the tongue B. The mouth of the mortise is made the base of the tongue B, and its inner end is made of a height suflicient to permit the end of the tongue tobe inserted into it and allow the projection C to slip into its place in the -recess made to receive it. After the tongue is so inserted, and the projection on it is placed in position in the recess named, a space will be left between the lower part of the tongue and the lower part of the mortise (as shown in Fig. 3) in which molten metal-either cast-iron, lead, a miX- ture of lead and tin, or such other metal or mixture of metals as may be found best adapted to the purpose, and be most readily applied-is to be poured through the orifice F formed for that purpose, to iill up the space thus left, and to complete the ligure and shape of the mortise and perfectly fitit to the tongue, and to hold the mortise and tongue in such intimate contact and connect-ion with each other that they cannot be drawn apart and separated. The air which is confined in the space named will be driven out, as the molten metal is poured in, through the orice F or through the interstices between the tongue and mortise, and betwen the ends of the beams that will naturally occur in fitting them together. The end (or ends) of this beam has bracketed 'enlargements the same as those described on the beam A. These enlargements are put on and added to t-he beams to increase the stability and rigidity of them, when joined together, by increasing the leverage distance from the top of the joint to the center of the tongue and by providing a larger bearing face to the ends of the beams.

To increase the stability and permanency of the joint I make corrugations or indentations on the surfaces of the tongue and of the mortise between which the molten metal is to be poured. This feature when combined with the peculiar construction of the tongue and t-he mortise is very important inasmuch as the security of the joint does not entirely depend on the projection C, when submitted to a strain in the longitudinal `direction of the beams, as it is the case when said surfaces' are smooth.

The advantages of my improvement are, that the beams are not weakened by drilling or otherwise forming both holes through them to secure them together, as in the usual manner that the beams are more securely and rigidly jointed together, and have not the opportunity, or the liability, of displacement, as when jointed together by bolts and that the jointing is less expensive, as the tongue and mortise can be perfectly formed in casting, and will require no uture fitting together, while the jointing metal and its application is cheap and ineX- pensive.

I am aware that gas and water pipes are jointed together by pouring in molten metal to conline the ends of the pipes together, and that molten metal has been used to conne bolts and other fastenings in stone and other material, and I do not therefore claim broadly the use of molten metal poured nto a joint to confine and retain it in place,

What I do claim as my invention and desire to secure by Letters Patent is- Forming a rigid joint of two metal beams by pouring molten metal between the tongue of one beam and the mortise of the other, constructed respectively and arranged in the manner described z'. e. when the sides of vthe tongue, which have a latch projection,

fit on to the sides of a similar shaped mortise and socket and when the opposite sides of both, the tongue and the mortise are corrugated and leave a space between themselves, into which the molten metal is to be poured substantially in the manner and for the purposes specied.

y SAMUEL NOWLAN. Witnesses:

SIDNEY Low, FRANCIS T. Low.

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