US1248440A - Plaster-screed. - Google Patents

Description

W. H. BMIBH. RLASJIEH Scano.. Armmlow FILED um@ 30. un.

Lmwmm@ Mmm mb. 4, ww.

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W. H. BAUCH. msm, scnEEn.

APPLIEMION FILED IUNE 30. 19H.

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WILLIAM I-I. IBA'UCH, 0F LAPOR'IE, INDIANA, ASSIG-NOR T0 AMERICAN -WAY PRISM CO., OlE LAOItTE, INBIANA, A. CORPORATION OIE' PEN'NS'YLVANIA.

PLASTER-SCILEED.

LZiSAlLO.

Specification of Letters Patent.

Patented Dee.. et, 191th Application ined rune so, i917. semi no. 177372.

To all whom it may concern:

Be it known that I, WILLIAM' I-ll. Banen, a citizen of the Unitedl States, residing at Laporte, in the county of Laporte and State of Indiana, have invented certain n-ew and useful Improvements in Plaster- Screeds, of which the following is a specification.

This invention relates to improvements in plaster screeds, such as are used to gage the plaster-thickness in plastering walls and to provide nail-receiving bodies of wood or other fibrous material to which the trim and wall fixtures may be attached. Such screed's are commonly affixed to the support, such as a cement wall, bya dab of settable plastic, such as plaster of Paris, and are so placed that the wooden blocks have their outer surfaces in a desired plane. In so placing the 'screeds, especially upon an uneven cement or concrete foundation, the thickness of the attaching adhesive-dabs may vary quite materially and in some instances the base of the screed must come flush or very nearly -flush with the foundation wall.

@ne object of my invention is to provide a screed that may be affixed with a minimum adhesive dab and, if need be, with its base flush against or very close to the foundation.

A further object is the provision of such a device in a form which may be manufactured at low cost and which is of sturdy andl rugged construction and efficient in use.

Still other and further objects will become readily apparent to those skilled in the art from the following description taken in conjunction with the accompanying drawings, wherein- Figure 1 is a plan view of a metallic base blank;

Fig. 2 is a side elevation of the completed article;

Fig. 3 is an end elevation thereof;

Fig. 4 is a perspective view of the screed illustrating its method of attachment; and

Figs. 5, 6, 7 and 8 are views corresponding with Figs., 1, 2, 3 and t, but showing a modification.

My improved screed, in common with others heretofore known, comprises in general, a metal base 'structure and a wooden block carried by the base. Distinctively from known practice lf provide special constructions of block and base affording numerous advantages, and more particularly lf provide in the base recesses or chambers, rearwardly opening to afford pockets for the retention of a material amount of the plastic dab between the wall and the screed at selected areas even when the base is jammed against the foundation wall, and also having openings through the metal base communicating therewith through which the plastic may protrude and bond, all insuring against accidental displacement or loosening of the screed before the layer of wall plaster is applied. Also, by this construction, I make the base plate strong and light, enabling very thin gage metal to be effectively used without too great liability to bending, and have simplified the mechanical construction and the assembling operation.

Referring to the embodiment of my invention illustrated in Figs. 1 to 4L, the wooden block 10 is of generally rectangular form in plan, having a fiat outer surface 11 of less area than its bottom, the end walls 12- 12 being inclined and the side walls 13-13 likewise inclined and terminating at laterally extending flanges or wings 111 which run along the sides of the block at the bottom thereof for engagement with lips of the metal base.

As a bla-nk the base is appropriately cut for formation, with end portions to lie in a common plane, a center portion to lie in the same plane, and sideportions to be ribbed so as to form, in the parts that will flank the wood block, bottom opening chambers elevated preferably to about the same extent as the depth of the wood wings 14 of the block and having at their crests inwardly facing lips to over-lie the wood block wings.

In the specific construction shown in Figs. 1 to 4, the thin metal base plate has twotransverse openings 16, 16, separated by an intervening transverse strip 17 that connects the uninterrupted borders along the sides of the blank. Each of these openings 16 is so shaped as to leave along its longer edges baselips 18 and at its ends the inwardly projecting lips 19. rIhe blank is then formed (in practice it may be accomplished by one operation) to shape the metal of the side border beyond each end of each opening 16 into a rib, tapering (or curved) outwardly thereby to form in the plate four rearwardly opening pockets, 20, each pocketforming rib having its crest bearing the i11- wardly projecting retaining lip 19 positioned fiat in parallelism with the base-end and suitably spaced therefrom snugly to receive a block-wing 14. In this formation of the blank, of course, the overall length of the base structure is decreased, the base lips 18 vbeing brought into close proximity for minimum loss of strength, and to give maximum bearing surface to the wood block.

Into the guide way thus formed between the contiguous ends of the ribs the wood block may be slipped endwise for adequate 'retention by the lips 19 overlying the wings of the block.

In the blank apertures 21 are formed at suitable intervals around the border portionpreferably both at the ends and sides-there being preferably certain of these apertures, 21, so locatedas to open through the sides of the chambers 20, preferably close to, or insecting, partially, the horizontal bottom of the base.

`As shown in Fig. 4 the plaster of Paris dab Q2 is applied to the bottom side of the plate filling the chambers 2O and protruding through the openings 21 and 21a so that even if the screed be pressed so hard against the supporting wall 23 as to squeeze the plastic into a very thin layer or practically squeeze it all out beneath the fiat portions of the base, ribs of the plastic remain in the bottom opening pockets or chambers to cause adequate adhesion of the metallic base to the supporting wall.

In theconstruction shown in Figs. 5 to 8 AI have illustrated a modified embodiment of 'the invention wherein the wooden 'block is the same, but the base is so constructed that when completed it provides a single large central chamber 20 on each side of the wood block in lieu of the two narrower channels 20, and correspondingly a single wide lip 19 to overlie the block wing in lieu of the two separated wings 19 of Fig. 4. 'In the blank for this form of construction, as illustrated in Fig. 5, the central opening 16 lies between the base lip 18 at its sides and the lips -19 at its ends, suitable cuts 17 effecting the desired severance between lips 18 and 19 to permit thev formation of the desired broad chambers 20. T he openings 21 and f2.1a perform the same functions in this type of construction as in the other.

The construction last described may, of course, be made with a somewhat simpler die than that first described, and offers other advantages, while the greater stiffness and wider separation of the points of retention of the wood block by the lips 19 gives same special advantages to the construction shown in Figs. 1 to 4.

It will be apparent to those skilled in the art that I have illustrated two forms of embodiment of my invention especially with a view to indicating that wide changes in detail may be 'made without departure from the spirit of my invention and it will be apparent that many other and further changes may be made without departure from the spirit of my invention and within the scope of the appended claims.

I-Iaving described my invention, what I claim is 1. A plaster screed comprising a wooden block having side portions shaped for cngagement with lips and a sheet metal plate ribbed outwardly at opposite sides of the block to form bottom opening recesses to receive the plastic by means of which it is attached to a wall and providing at the crests of said ribs lips inwardly projecting to engage the appropriate portions of the block.

Q. A plaster screed comprising a wooden block having projecting wings at its bottom and a sheet metal plate having a eentral portion lying in ay plane to give bearing to the block and flanking portions formed into ribs to provide bottom opening chambers for the reception of plastic, each such rib terminating at its inner end in a projecting lip to overlie a wing of the block.

3. A plaster screed comprising a wooden block having wings 14 near its bottom and a sheet metal plate having a. central portion lying in a common plane to underlie the block and side border portions flanking said block outwardly bent to form ribs, aiording inwardly opening chambers for the reception of plastic, each such rib carrying an inwardly projecting lip to overlie the corresponding wing of the block.

In testimony whereof I hereunto set my hand in the presence of two subscribing witnesses.

WILLIAM II. BAUCH.

In the presence of- C. H. PASCHALL, FLORENCE LINor.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents Y Washington, D. C.

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