US 802727 A
Description (OCR text may contain errors)
lilhlITFD STATFE PATIENT UFFICE.
METAL LATl'l CONSTRUCTlQN.
Specification of Letters Patent.
Patented Oct. 24:, 1905.
Application filed November 3, 1904. Serial No. 281,290.
To all 111700111 if; m/uq concern:
Be it known that I, ALFRED S. ALSOHUL'ER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Metal-Lath Construction, of
which the following is a full, clear, concise,
and exact description.
My invention relates to sheet metal lathing designed more particularly for the outer walls of buildings where it is desirable to provide an air-space between the plaster and the brick or other wall which is to be covered.
My metal lath is formed from sheets which may be, for example, from twenty-two to thirty-six inches wide and which, extending from floor to ceiling, are secured by staples, which may be inserted through openings at the lapped edges of contiguous strips and driven into the wall. In case of brick walls, which I have more particularly in mind, the openings will be selected which register or approximately register with the mortar joints.
The best results are obtained by stamping sheets of metal to form tongues upon the rear portion thereof, which tongues are bent back preferably at less than right angles to the general surface of the sheet. It is suflicient if the spaces in the sheet of metal which result from stamping out and bending back the tongue amount in the aggregate to, say, from one-eighth to one-fifth of the entire surface. This permits the mortar to be forced through the openings to form keys to hold the main body of the plaster in place. The tongues, extending backward and preferably, say, [ifteen degrees upwardly from the horizontal, receive the mortar forced through the open ings, and when the same hardens a dead-air space is formed between the wall and the lath. In case the mortar, which is forced through to form keys, touches the wall it will be only at comparatively small points. In this mannor the dead-air space is made practically coextensive with the surface of the wall that is covered.
I n the drawings which are illustrative of my invention, Figure 1 is an elevation showing the lath in place, a portion thereof being covered by plaster. Fig. 2 is a full-sized sectional view on line 2 2 of Fig. 1. Fig. 3 is an iso metric view which may be considered as full size. Fig. t is a sectional view on line 3 3 of Fig. 1, showing the manner of stapling the sheets of lath to the brick wall; and Figs. 5
and 6 are perspective views illustrating modifications in the form of the tongues.
Like parts are indicated by similar letters of reference throughout the different figures.
The sheet of metal a may be quite thin-say one-fiftieth to one one-hundredth of an inch in thickness. The tongues 7) I have made fiveeighths of an inch wide and seven-eighths of an inch long. These dimensions, however, admit of considerable variation, not only as to size, but as to number, within a given area.
As shown in Figs. 1, 2, and 4:, the sheets or strips of lath are placed against the wall with the tongues touching the wall, as shown in Fig. 2. Staples to hold the same securely in place, as shown in Figs. 1 and 4, are driven through the openings in contiguous strips and into the mortar joints of the wall. I consider it sufficient to drive the staples at the joints and edges, as shown in Fig. 1. It is, however, evident that, if desired, staples may be driven at as frequent intervals as may be thought best throughout the surface, the particular openings to be embraced by the staples being selected at points opposite joints in the brick, so that the staples may be driven in to hold the lath with the tongues pressed against or touching the wall.
The preferable position of the tongues is illustrated in the drawings. They are shown with their inner ends touching the brick wall, with their fiat surfaces rising about fifteen degrees from the horizontal to receive the mortar 0, which is forced through the openings and which, resting on the tongues, may project downwardly below the edges thereof. I have shown the first coat of plaster (:Z and a second coat a. By this construction it will be observed that no furring either by wooden or metal strips is required upon the wall, since the staples hold the lath in place, and the tongues touching the wall provide a sufficiently solid support. WVhen the plaster is put on and hardens, the tongues are reinforced by the mortar c, which is forced through the openings and supported upon the upper surfaces of the tongues. In Fig. 5 I have shown the tongues 7" cut narrower at the top than at the bottom, thus restricting the size of the openings. In Fig. 6 I have shown the inner edges g of the tongues bent upwardly to provide a plane bearing-surface to come against the wall and at the same time prevent the mortar from touching the wall, since the mortar which extends through the openings will come against the upturned edges and ordinarily will not extend above the same. With this arrangement dampness which the wall may contain is prevented from reaching the mortar or plaster.
Having thus described my invention, I claim as new, and desire to secure by Letters Patent, the following:
1. The combination with sheet-metal lathing provided with tongues I), of the brick Wall and the plastering, said lathing being stapled to the wall by staples inserted through openings formed in cutting the tongues to press the tongues against the wall, the tongues being attached to the lower edges of the openings, the mortar forced through the openings coming against the tongues and being supported thereby; whereby a dead-air space is formed between the plaster and the wall practically coextensive with the surface of the wall that is covered, substantially as and for the purpose specified.
2. The combination with sheet-metal lathing provided with tongues 6, of the brick wall and the plastering, said lathing being stapled to the wall to press the tongues against the same, the tongues being attached to the lower edges of their corresponding openings respectively and having their inner ends bent upwardly and lying against said wall, the mortar forced through the openings coming against the tongues and being supported thereby; Whereby a dead-air space is formed between the plaster and the with practically coextensive with the surface of the wall that is covered, substantially as and for the purpose specified.
3. The combination of metal strips of lathing With the brick wall of the building, said strips having overlapping edges, staples inserted through openings in the strips and driven into the mortar joints of the wall to secure the strips together and to the wall throughout the extent of the surface covered; the said strips being provided with tongues stamped out from the metal to leave openings therein,
said tongues being attached at the lower edges of the openings and extending rearwardly,
and the plaster' supported by the lath; substantially as shown and described.
at. The combination with the sheet-metal lath provided with tongues formed from the metal sheet and projecting backwardly, of the brick wall, staples inserted through openings in the metal sheet and driven into the mortar joints of the wall to secure the lath in place with the tongues pressed against the surface of the wall, and the plastering covering the face of the lath and having portions thereof forced through the openings to form keys to hold the plastering in place, the tongues having their flat surfaces in position to receive and support the mortar forced through the openings; whereby the plastering is solidly supported, and a dead-air space secured between the face of the wall and plaster substantially as shown and described.
5. The sheet-metal lath provided with the tongues cut or stamped out to be integral with the main sheet and adapted to serve as spacers between the wall to be covered, in combination with the wall, the sheet of metal lath being stapled or secured to said wall, said tongues being flexible and bent slightly to permit them individually to yield to any uneven surface of the wall, and the plaster covering the outer surface and forced through the openings formed by the displacement of the portions of the sheet forming the tongues, the mortar forced through the openings being supported on said tongues; whereby a dead-air space is formed between the plastering and the wall, substantially as and for the purpose specified.
In witness whereof I hereunto subscribe my name this 29th day of October, A. D. 1904.
ALFRED S. ALSOHULER.
GEORGE P. BARTON, IRVING MACDONALD.