US1877964A - Reenforced metal lath - Google Patents

Description

Sept. 20, 1932. W J, PURSER 1,877,964

REENFORCED METAL LA'IH` Filed Oct. 27. 1950 lll@ i l'HC-Mll Patented Sept. 20, 1932 UNITED STATES musei PATENT y OFFICE WILLIAM J. PURsER, OF'MINERAL RIDGE, OHIO, AssIeNoR To THE BosTwICK STEEL LATII COMPANY, or NILEs, OHIO, A CORPORATION or OIIIO REENFORCRD MRTALl LATH Y Application filed ctober 27,1930. Serial No. 491,544.y

This invention relates to improvements in reenforced metal lath of the non-expanded type, and has in View toprovide a non-eX- panded metal lath structure of the corrugated or channeled type including a novel combination and relative arrangement of reenforcing and plaster keying formations designed to impart requisite stiffness to the lath and to effectively hold the plaster thereon, and at the same time to provide for eifecting economy in the use of plaste-r when plastering or covering the lath.

With the fo-regoing and other purposes in view, the invention consists in the novel features of construction and in the novelcombination and arrangement of said features as will be hereinafter more fully described, illust-rated in the accompanying drawing and defined in the appended claims.

In the drawing, wherein like characters of reference denote corresponding parts in the different views Figure 1 is an outer face view of a section of metal lath fabricated in accordance with the present invention.

Figure 2 is a perspective view of a section of the lath.

Figure 3 is a longitudinal section on the line 3-3 of Figure 1.

Figure 4 is a transverse section on the line 4-4 o-f Fig. 1; and

Figure 5 is a transverse section on the line 5-5 of Fig. 1.

The sheetmetal body or base of the present lath, designated in the drawing as A, is o-f corrugated or channel form, or, in other words, is composed of a plurality of parallel ribs 10 and a depression 11 between each adjacent pair ofy said ribs, said ribs and depressions being continuous longitudinally from end to end of thebase kor body A and preferably being of materially greater width than depth, with the ribs slightly exceeding' the depressions in width.

Stiffening beads 12 preferably are formed along the top of each rib- 10 at the ysides thereof, respectively. Preferably, too, transverse Stiifening formations or beads 13 are formed at evenly spaced intervals along each rib 10 between and connecting the beads 12. Thus,

the top of each rib 10 isdivided by the transverse beads 13 intoa plurality o-f shallow depressions or plaster seats 14, each of which, in accordance with the invention, is longitudinally slitted adjacentto the beads12, 12, respectively, as indicated at 15, and has the metal between said slits press-ed together and arched outwardly to provide a so-calleditruss loop16. Y v

Formed at longitudinally spaced intervals along thebottomof each depression 11 are transverse stift'ening ribsv or beads17, and between each adjacent pair of saidl ribs'orV beads the metal of the bottoms of said de pressions 11 is longitudinally slittedy adjacent to the side walls of the depressions, as indicated at 18, to provide, between each pair of said slits, a flat band-like formation 19 which is arched outwardly as shown. f v

Preferably the beads 17 of the several depressions 11 are disposed in parallel rows transversely of the body or base A, as also are the'beads 13 of the ribs 12, and, as shown, the rows of beads 13 preferably are disalined with respect to the rows of beads 17 so that the truss loopsl are staggered with respect to the arched, band-like reenforcing formations 19. Thus, the inherent rigidity and strength of the channeled base or body A is materially enhanced by the trussfloop formations 16 and the'arched bands 19, with the resulty thatl lthe present. non-expanded metalY lathv fabrication*V possesses.l great strength and stiffness both longitudinally and transversely and any possibility of the samer buckling of partaking of an undulating or wave motion when plaster is applied thereto is substantially eliminated.

C When the sections of metal comprising both the truss loop formations 16 and the Hat band-like formations 19 are arched outward it follows that the edges of the .metal adjacent to theslitsl and 18 arespread apart so that the Originally narrow slits take the form'ofgrelatively wide openings through which plaster may pass from one side to the other of the'lath sheet. This is particularly true with respect to the slits at either side ofthe respectivetruss loops 16 dueto pressing togetherfof the metal of said truss loops,

but with respect to the arched bands 19 which are flat, it will be noted that the width of the openings provided by vthe slits 118 to either side of each of said formations is relatively narrow, so that in applying plaster to the lath sheet considerably less plaste-r is permitted to pass through the slits or openings 15. Thus, the present lath provides for effecting a saving in plaster as is manifest, particularly as compared with a lath in which all of the reenforcing or truss loop formations have the form of the truss loop formations 16, and at the same time the present combination of reenforcing formations impart to the lath the desired and requisite stiffness and strength.

Obviously, in view of the foregoing, the arrangement shown might readily be reversed by providing the ribs 10 with the flat band-like formations 19 and providing the depressions 11 with the truss loops 16; or, both the ribs 10 and the depressions 11 might be provided with band-like formations similar to the formations 19 without appreciably sacrificing stiffness and strength of the lath sheet in o-rder to provide for a material saving in plaster.

Without further description it is thought that the features and advantages of the invention will be readily apparent to those skilled in the art, and it will of course be understood that changes in the form, proportion and minor details of construction may be resorted to, without departing from the spirit of the invention and scope of the appended claims.

I claim 1. A metal lath structure comprising a sheet of metal corrugated to provide alternate parallel rib and depression formations, the metal of each of said formations being longitudinally slitted at spaced intervals to provide reenforcing bands, the bands of certain of said formations being arched longitudinally and squeezed together to provide truss loops, and the bands ofl the other of said formations being arched outwardly and being continuously flat throughout their respective lengths.

2. A metal lath structure comprising a sheet of metal corrugated to provide parallel ribs and a depression between each adjacent pair of said ribs, each rib being longitudinally slitted at longitudinally spaced intervals to provide reenforcing formations, said formations being arched longitudinally and squeezed together to provide truss loops, and the bottom of each depression also being longitudinally slitted at spaced intervals to provide other reenforcing formations, the latter formations being arched longitudinally and being transversely flat. v

3. A metal lath structure comprising a sheet of'metal corrugated to provide parallel ribs and a depression between each adjacent pair of ribs, a stiifening formation along the top of each rib at each side thereof, truss loop formations at longitudinally spaced points along the top of each rib between the stiffening formations thereof, and transversely flat longitudinally arched bands pressed from the bottom of each depression at longitudinally spaced intervals.

In testimony whereof I hereunto affix my signature.

WILLIAM J. PURSER.

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