US1442029A - Lathing - Google Patents

Description

Jan. 9,1923. 1,442,029. l. F. PHILLIPS.

LATHING.

FILED 1uLY-a,192o.

..7 @az 2225/2, wg

MW ma Patented Jan. 9, 1923.

UNITED STATES 1,442,029 PATENT OFFICE.

JOHN `FRANCIS PHILLIPS, OF SPOKANE, WASHINGTON, ASSIGNOR, BY MESNE ASSIGN- MENTS, OF vFOIEt'It'llIVE ONE-HUNDREDTHS TO CHARLES P. OUDIN', OF SPOKANE,

YVASHINGTON. l

LATHING.

Application filed July 8, 1920. Serial No. 394,749.

To all whom/t may concer/rb.'

Be it known' that I, JOHN FRANCIS kan; Lire, a citizen of the United States, residing at Spokane, in the county or' Spokane and State of llashington, have invented certain new and useiul improvements in Lathing` et which the following is a specilication. rlhis invention relates to improvements in building' material and more especially to an improved lath.

My improved material is provided with keyfholes of an improved type which Jfunction with great advantage to retain the plaster or other material at that critical time just previous to hardening when the plaster otherwise has a tendency to fall away from the surface to which it is applied, these holes being ci such a novel formation as to shape the keys -formed thereby in a manner to cause these keys to perform their function with the least possible waste, and to take such form that they will function in the most eilective manner.

My invention has many other features and objects which will be more fully described in connection with the accompanying drawing and which will be more particularly pointed out in and by the appended claims.

In the drawing Figure l, is a face View of the studding against which my improved building ma terial is applied, and before the plaster is put on. l v

Figure 2, is an enlarged sectional view on line 2--2 oi Figure l, showing one view of a key. .A

Figure 3, is an inside view of the key looking in the direction of the arrow of Figure 2.

Like characters of reference designate similar views 'throughout the different gures et the drawing'.

As illustrated, the invention is shown in the form of lathing applied to studding l.

' My improved lathing is preferably formed ot paper or like brous material in sheet form. rllhe paper is eut in units of sheetstrip form, as indicated at 2, oi' a convenient width and length to facilitate handling, and the units are applied to the studding with their lateral and end edges in abutting rei lation to Yform a complete and continuous facing for the` studding thereby greatly adding te the warmth oi the building. Before the paper is ready lor use, it is stifiened and strengthened by being corrugated, as indicated at 3, and l dispose the co-rrugations, in the preferred form, in such a manner that they will extend horizontally. Thus, the plurality of ribs and hollows or hills and 'vales ot' the corrugations will afford the plaster a series of supporting surfaces when the plaster is first applied, which is the critical time, just. prior to setting, when such support is most desired and effective. It is not important whether the corrugations of the abutting strips register at the end portions ofthe strips. In fact, the ends of the strips will, in practice, probably not actually abut in endwise engagement, and they are shown in very slightly spaced relation. The usual shingle nails may be employed to fasten the material, as shown at 4, the nails being driven into the studding.

Either before or after the strips are corrugated, itbeing immaterial to this invention, key holes 5, are formed in the strips. These key holes are of novel formation and are shown to be of half-moon form, the straight edge portions 6, thereof, not only being horizontally disposed but uppermost with respect to the lower arcuate margins 7. These holes are interrupted by a bar 8, which is a part of the material not cut-away and which in fact divides the key hole into two openings 9 and l0. The lower edge 11, likewise forms a cutting or shearing edge after the manner of edge 6. This will result, irrespective of whether the bar 8, or the edge 6, comes at the crown or the hollow of the corrugations, as illustrated in Figure 2. Thus, the plaster will, in the upward stroke of the implement, be forced through opening 10, and subsequently through opening 9, the latter portion of plaster lobbing down about the bar S, as shown at 12, and joining the lower projecting plaster 13, the two forming a key which extends about the bar 8, which may thus be termed a locking bar, because the key is locked t0 Said bar when the plaster dries. Further, while l obtain a most efective key, l avoid waste' of the plaster as would be 'the case il a single large opening or key hole were provided. By means of this construction, a suflicient amount of plaster passes or projects through the key hole to form an effective key and yet I avoid an eX- cess which might drop as it does from between wood lath, such droppings being a total waste. Further, l get a stronger key,

with less plaster than heretofore by reason of the bar lock, the plaster, in forming the key, actually uniting with the lathing. With a single opening, the plaster forming the key, if suiicient, is Wholly dependent on the size of the key and therefore on the amount of plaster or cross section of the key, whereas, with a minimum. of plaster. in this construction, a key of the strongest possible type is formed. lt may be considered that the openings 9 and 10 constitute companion and adjacent openings in such juxtaposition that the intervening bar 8, `causes the plaster to form united keys, such openings, in this form, being in line with the plastering stroke.

After the paper has been corrugated and the key holes have beenformed therein, it is coated, preferably on both sides, with a novel waterproofing and preserving material having the property of not only rendering the paper inaccessible to the moisture of the plaster, and thereby protecting the paper from resulting' rot, but also stiifening the paper and lending to it a rigidity suppleinenting the stiffening action imparted by the corrugations, thereby enabling me to use a 'lighter weight paper than 'would otherwise be possible. In practice, I have found that commercial tar, such as is commonly used on building material, not only performs all the foregoing functions, but in addition, greatly extends the life of the lathing. By applying the tar after the material has been cut to size, corrugated and formed with key holes, all the exposed edges are'coated with tar, and thus the most complete protection of all `parts is afforded. .lt may also be stated that whatever weakening effect the key holes cause, is more than made up and ofl'set by the added strength imp-arted by the coating 0f tar. This fact is emphasized by reason of the relatively small openings necessary because of the locking bar interposed therebetween.

ln order to present a most effective adhering surface to the plaster, the plastering face of the strips, before the tar dries, is spread with a comminuted earthly material, such as relatively fine sand so that when the tar dries, the sand will present a rough and abrasive surface tothe plaster. This is an important feature, especially when the plaster is first put on as it is at this time that it is most important that it should adhere to the lath.

Now it will be clear that my improved lath is sufficiently inflexible to resist buckling under the thrust of the plastering implement, and that it Will present a uniform surface to the plaster applied thereto, making a continuous surface. The strength of the material makes it unnecessary to provide a double sheet or strip, or a composite lath with an intermediate filling, a single sheet being suiiicient.

By havingr the lath waterproof, the moisture of the plaster is not only prevented from entering the lath or travelling toward it, but the moisture is necessarily drawn outwardly through the entire thickness of the plaster, by the air, and consequently, the plaster is completely dry when it does set.

The fact that the plaster is completely dried throughout its thickness, makes the plaster stronger than it otherwise would be. Thus the plaster can never later soak upl any moisture from the lath, which action would weaken the plaster. TWhen the moisture is drawn out through the thickness of the plaster, the latter retains all its setting properties.

lt is believed that my invention will be fully understood from the foregoing, and while I have herein shown one form thereof, I do not wish to be limited thereto except for such limitations as the claims may import.

Iclaimzfl. A lathing sheet composed of a corrugated paper strip having companion key holes located in corresponding' sides of adj acent corrugations with a bar therebetween, whereby the plaster' keys formed by said holes will unite with each other about said bar. .f

2. A lathing composed of a corrugated sheet of material having companion key openings formed in adjacent vales of the corrugations, said openings interrupting the hills of said corrugations to form shearing edges whereby the plaster will be forced through companion openings and will bond about the intervening portion of the sheet and behind the latter.

3. A corrugated lathing sheet having adjacent superposed key openings located in adjacent corrugations and ar locking bar separating said openings, each opening having an upper straight edge shearing margin and the lower opening having a rounded lower margin.

ln testimony whereof l. hereby ai'ix my signature.

JOHN raf/mors r'i-irnrars.

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