US1049629A - Lathing. - Google Patents

Description

A. P. WHITE.

LATHING.

APPLICATION FILED APR. 8, 1910.

Patented J an. 7, 1913.

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ALEXANDER r. WHITE, or CALDWELL, NEW .Haarsma Larme.

" Specification of Letters Ilaitcnt.`4

/ Application med April 8, 1910.- Serial No. 564,168.

To all wlwm, t may concern: n

Be it known that I, ALEXANDER P. Wm'rn, a citizen-of the United States, residing in Academy street, Caldwell, county of Essex, State of New Jersey, have invented a new and useful Improvement in Lathing, of is a specification. This invention re ates to lathing for holdand ceilings and the obing plaster on walls ject of it is to provide an imcproved article hereinafter.

Figure 1 is a perspective view of the im. proved lathing,

'indicating one method b 2 -s an enlarge cross section showing metallic members embedded in the fibrous material. Fig. 3 is a plan view showing openings or hole's forming keys for the plaster. Fi 4 isa cross section on the line 4-4 o Fig. 3, showing depressed lip portions designed to 4 incline the plaster .to .engage the wire memed to form a key bers. The dotted lines in the ligure indicate the plaster body. Fig. 5-is a view in perspective, showing .a modification having a roughened surface to which the plaster can adhere.

Like reference letters refer to like parts in ythe-different figures. l

A represents the sustaining members B the fibrous material; C the openings adaptfor the plaster; D lips, formed by pressing down the portion of the fibrous sheet slitted to make the openings C, andv E the plaster substance.

' At the present time net like structures formed by weaving wires are largely used v to hold plaster. Expanded metal made by mortar must therefore .be of a heavy slitting sheet metal and s reading open the slitted portions into net l1ke fabrics' is also extensively employed forthe same purpose, butin the use of both these articles coni siderable trouble is experienced byl reason of the tendency of the thinfand narrow metallic strands` to cut the mortar. To avoid undue .waste when applied to them the thick consistency, and its application requires slow an reat care. Moreover, even with cautious a plication, it frequently happens that the ight metallic structure early appear will not sustain the burden of an ordinary* iirst layer .or coat of mortar, making it then necessary to create a foundation for the substantial body, by first applying a preliminary thin coatin which on setting prevents any movement o rigidity required. On account of t e value of met-al, and the difficulty of manipulation y when the metal is heavy, it is not practical to make the aforementioned lath fabricsl heavy. Thestrands must be near one another in order that the o It will be seen presently that my invention, however, permits a more eiiicient distribution 'of the metal and which the plaster can e tion against rust. The liability o these metallic lath fabrics to corrode when used in present `forms, constitutes a serious objection. Many of theplaster preparations in common use, ble walls and ceilings, contain ingredients which cause rapid deterioration from rust, especially in spots exposed to the atmosphere. Another .advantage of the new product which is peculiar to this novel of lathing, is that it is possible with its use to protect the plaster wall itself as well as Patented Jan. 7, i913.

the metal and im arts the r penings be of small y dimensions, capable of holding the plaster.

rovides a structure to applied readily and quickly without particular care and skill, and without undue waste. It will be seen, too, that it provides also thorough rotecwhile excellent for making durav the metal from deterioration, due to the condensation of moisture. This result is effected by applying to the reverse side, i. e., the side which does not receive the plaster, a coating ofl waterproofing compound of which there are a number well known, but

it is not desirable to apply the compound on the 'side which receives the plaster, since it would interfere with the tendency of the plaster to adhere to the fibrous material.

In carrying out the' invention, `I prefer form a grid, the 4wires being arranged at suitable distances apart to act as sustainingy members for the plaster. I select a fibrous material, such as paper, and cover one surface of the same with silicate of soda, 0fthe consistency of ordinary mucilage. Between layers of the paper I placethe wires, and pass the paper and wires between mechani` o'f the lathing sheet so as to Aand consolidate, forming a strong, rigid sheet,

as indicated by Fig. 1. V

It is obvious that a' paste made by`boiling 5 a mixture of ryeflour and water, or numerous other adhesive pre arations may y be used, inheu of silicate o soda.

ing, can be adapted to roughenthe surface rovide `for the adhesion of the plaster. T e roughening may consist of suitable indentations or deressions, or instead, the sheet maybe perorated or punctured. The openings are preferable, and it is highly desirable to make the openings near, or adjacent the wire members, especially the heavier members, so as to permit the plaster to engage the Wires as shown in Fig. Li. It is also desirable to make the openings with a lip as shown in Fig. 4, by slitting the paper, and pressing down theslitted portion instead of cutting it away.T The lips are designed to cause the plaster to spread and increase the clench, as

' y25 Well as to. cause the plaster to engage the wires when the openings are adjacent to the Wires.

Since .the fibrous material is thus designed to serveas a vehicle to carry the plaster until place, it is as in the present structures, and that a given 'quantity of metal can be disposed in thick strands or members in this combination imparting much greater strength, than if divided into a larger number of smaller members. I prefer to use at intervals of about seven inches, wires of l2 or 14 gage, U. Si. standard, and to use lighter Wires, about 20 40 gage, about one inch apart, intermediate-the heavier ones. Crossed wires are placed at distances suiiicient to hold ythe other wires in place, or the cross Wires may be entirely omitted. p

AlthoughI have described a simple Way of' making the :material voi the invention, it can be made in other Ways, as for instance,

' by Wholly or partly embedding the wires in the fibrous product While the fibrous mate- '50 rial is in a .plastic state. In such case, it is also desirable to use silicate of soda which can be introduced by mixing it into the plas- -tic mass, before it is rolled or pressed. ',Ihis compound, (silicate of soda) serves not only 5-5 to add greatly to the stiffness of the article Vbut also to give it tire resisting ualities.

It is important to make the brous part of the composite lathing relatively thin so that it will not become a substantial portion \of the Wall body. The fibrous sheet should be no thicker than is necessary toperform the function of rigidly' holding the plaster in place, because the Wall body should be as nearly homogeneous as possible, instead of especially w consisting of vdifferent substances of ent physical properties.

The function of the paper is not to become an integral or permanent part of thewall body, but to serve only temporarily to give formto the plaster and coperate with the metal to hold the plaster in place, until it The rolls or other instruments for press'4 dries and hardens enough, to depend on the metal parts for v permanent support. After the plaster is dry, the pa er may be scraped oli without impairing t e Wall body, but this of course, 1s not necessar and seldom possible except in partition wa s.

It is well known'that a wet body of laster changes its physical conformation .in that the contraction'with theI departure o the moisture, however slight it may be, meets resistance when the Wet mass is against ay solid, inflexible or immovable surface, often causing the plaster to crack, but the paper,

en of an absorbent character, will accommodate'itself to these changes after having, in its capacity as a mold, caused the plaster to take the form desired. I have, therefore, Ain the claims of this specification, employed the term flexible to distinguish the paper in my article from the inflexible slabs and boards which, after a finishing coat of plaster is (applied to them, are intended to continue essential permanent parts of the wall structure. It is of course understood that .the paper must be substantial enough for its purpose, and it is desirable to break the` paper surface with numerous perforation's, so as to diminish liability onthe part of the paper to Warp, or prevent injury, in'

. l. A structure for lathing consisting of a seriesl of metal members embedded in a supporting body of fibrous material, the said fibrous material being depressed between the metal members, thus forming raised ribs or `ridges which project beyond the plane ofY the lathing.

2. A structure for lathing consisting of va series of metallic members and a body of -ibrous material in which the metallic mem bers are embedded forming ribs, said body having openings therein, and the ribs being disposed adjacent the openings to permit the plaster to engage the ribs, and the parts of the said ribs in proximity to said openings being covered with a protective coating of` broiis material.

3. A structure for lathing'consist-ing of a body of fibrous material having openings therein, primary and secondary reinforcing means embedded in said body and dis osed adjacent the openings to permit the p aster to engage said means, the parts of the said reinforcing means in proximity to said openings being covered wlth a protective coating `of fibrous material.

4. A building form consisting of a series' of metallic members and a supportin body therefor of brous material 1n whic said metallic. members are embedded formin ribs, said body having openings therein, an

the ribs being disposed adjacent the opening 10 to permit the plaster to become engaged wit the ribs.

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