US1691227A - Metal lath - Google Patents

Description

L. W. CROSS METAL LATH Filed Oct. 12. 1926 S F J INVENTOR 3 f 571% l\ q ATTORNEY$ Fig. 1, Fig.2, however,

Patented Nov. 13, 1928.

UNITED STATES PATENT OFFICE.

LEONARD W. GROSS, OF WHEELING, WEST VIRGINIA, ASSIGNOR TO CONSOLIDATED EXPANDED METAL COMPANIES, OF BRADDOOK, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

METAL LATE.

Applioationlfiled October 12, 1926. Serial No. 141,074.

This invention relates to metal 'lath,t'hat is to say, it relates to that class of expanded metal which is made of relatively light gauge metal expanded substantially by deploying.

in contradistinction to the heavier grades of.

expanded metal made on the guillotine machines.

As an example of a deploying machine for expanding metal fabric, I refer to the Salmon and Booton Patent No. 1,408,647, 1ssued March 7, 1922, which shows a machine of the divergent guide type, and in connection with which my invention is primarily usefuh One of the primary objects of my invention is to make'it possible to make smaller diamond metal lath on a machine such, for example, as the divergent guide machine above referred to.

It is another object of the invention to produce metal lath which is relatively stifl and strong in those regions where stiffness and strength are required, and which is relative- -1 1i ht.

siiill another object of the invention is to provide sheets of metal lath which, considered as a whole, are relatively stiff, although composed of relatively light stock.

' More specifically it is an object of the invention to overcome certain difliculties in expanding the metal which will be more particularly hereinafter set forth, v

I obtain the foregoing, together with such other objects and advantagesas may hereinafter appear, tion, by means of the blank and the lath illustrated in the preferred form in" the accompanying drawings, wherein- Fig. 1 is a plan view of a fragment of a blank suitable for carryingout one form of my invention,

Fig. 2 is a plan viewof a fragment of a sheet of metal lath inade from the blank of being drawn on an enlarged scale, and

Fig. 3 is a view similar to Fig. 1 but showing'the spacing of the slits of the blank slitted in the ordinary fashion, or are incident to my inven-f edges. small diamond metal lath from heavy stock. By the same token I am enabled to produce a smaller diamond metal lath, for; any given in the finished product, the strands 9 and connecting bridges 10. On examination of these figures it will be seen that the rows of slits for a distance. inwardly from the longitudinal edge B of the sheet are more widely spaced from one another than they are toward the middle portion of the sheet or blank. This provides strands and bridges for a longitudinally extending section of the lath which are wider than the remaining strands and bridges. The longitudinal section of the sheet of lath which is composed of these relatively wider strands and connecting bridges is, therefore, stiffer and stronger than the remaining portion of thevsheet It is to be understood that the rows of slits along each longitudinal edge portion of the blank are .made more wide, as above described, so that of the pin wheels 12, such as illustrated in the aforesaid patent will properly enga e the blank.

One of the important advantages of the foregoing is that I am enabled to make a corn mercially satisfactory product on such a machine from heavier stock than would otherwise be the case. If blanks of heavy stock, are expanded on a machine of this general character, there is apt to be a pulling out or breakage or distortion at the .edge 'portions of the sheet which is detrimental. not only from the standpoint of the finished product, but also from the standpoint of cost of manufacture because of the heavy losses involved. Therefore, it has been customary'to make a larger diamond metal lath when usingaheavy stock to avoid breakage in the machine at the By my invention I am able to make weight or grade of stock than was possible heretofore. I

Another advantage of the foregoing are-- rangement is that besides adding general stiffness to the sheet *103 p as a whole, the sheet is strong Where it overlaps the adjoining sheet and also where it is to be nailed to the Woodwork or studding. Ihus, by my invention I can secure adequate strength for nailing or support, while still using a very light gauge metal.

I claim:

1. Metal lath having a number of its strands and connecting bridges, from a longitudinal edge of the sheet inward, wider than the remaining strands and bridges whereby the sheet has a relatively stifi and strong section longitudinally and marginally thereof.

2. A blank for lath adapted to be expanded in an expanding machine of the divergent guide type comprising a metal sheet having rows of slits staggered transversely of the sheets to provide the strands and connecting bridges of the finished product, the rows of slits for a distance inward from a longitudinal edge of the blank being more widely spaced than the other rows. v

3. A blank for lath comprising a metal sheet having rows of slits staggered transversely of the sheets to provide the strands and connecting bridges of the finished prodnot, the rows of slits for a distance inward from a longitudinaledge of the blank being more widely spaced than the other rows.

4. Metal lath having certain of its strands and bridges lengthwise of the sheet wider than the remaining strands and bridges to provide a relatively stiff and strong meshwork section running len thwise of the sheet.

In testimony whereo, I have hereunto signed my name.

LEONARD W. CROSS.

Images