US1347633A - Spot-ground - Google Patents

Description

A. C. HORN.

SPOT GROUND.

APPLICATION FILED MAR.14, 1917.

1,3 33 l Patnted J111yv27, 1920.

UNITED sixfrss .AARON C. HORN", OF NEW YORK, N. Y.

SPOT-GROND.

Application filed March 14, 191'?.

` specification.

This invention relates in general to what is known in the building art as grounds or spot grounds, and in particular to screeds or framing piecesadapted to form a basis for other structure, and which may be effectively and readily attached at any desired point to a wall, partition or floor.

In fire-proof building construction, it' becomes lnecessary to fasten ground strips to a concrete, plaster, tile'or the like wall, partition or Hoor. The usual nail or screw attaching means clearly cannot be availed of with advantage in such cases and the direct attachment of these strips has been limited, as for example, to the location of the joints between blocks. Recourse has been had to several methods for providing suitable-'- points of? attachment for the grounds, but these always involve extra time, labor and material and substantially increase the cost of construction. One method commonly used is kthat of digging outfmortar'joints into which the grounds are driven.V But' this requires muchadditional timeand labor and consequent extra cost.

Cement compositions such as plaster of' Paris have been used'to attach grounds to desired .points on the wall or partition. But for this purpose the grounds-have hitherto been made with av metal base adaptedto be embedded inthe cement. This meta-l construction presents many practical difficulties. Thus, the base having a smooth surface, the bond between it and the plaster is not sufficiently strong.' Furthermore, water is always needed .in building construction to give plasticity to the materials used. Therefore, there is always present in the structure some moisture which together with the oxygen willcorrode the metal plate and cause it to wear away and eventually penetrate-,thewooden ground and cause it to vdeteriorate, while the -bond between the metal Yplate and the adhesive means ultimately Specification of'Letters Patent.

Patented July 27, 1920. serial No. 154,711.

and the plaster by perfor-ating the former and allowing the cement composition to pass therethrough.. But this involves-a material increase in cost of manufacture ofthe metal base, and as a whole the metal backed ground may be said to be too expensive for the -purpose sought to be attained thereby, in view of its aforementioned disadvantages.

@ne object, therefore, of this invention is to provide a spot ground which' shall be effectively and readily attachab'le toany wall,vfloor or partition at any desiredpoint thereon. Y v

Another object ofthis invention is to provide a spot ground of this character which shall be free fromthe disadvantages ofthe meta-l backed ground and yet cheap to manu facture.

A furthert objectl of this invention is to provide a spot ground ofthe character described which shall be durable, neat and compactfand easilyA handled and'shipped.

Further objects and advantages of this invention will appear from the detailed description and the features of-novelty will be particularly pointed out in the claims.

In the accompanying drawings forming a part ofthis specification,

Figure lisa broken away view showing the improved spot ground in use as a framing piece for the attachment'thereto of wooden building-parts, such as moldingand the like structure.

Fig. 2 is an enlarged broken away sectional view of one form ofv the'v improved spot ground.

Fig. shows a modified form of the spot ground in use as on improved f'urring strip for waterproofing.

Figs. 4:, 5, 6 and 7 show further modiied embodiments of this I invention.

Referring particularly to the drawings, my improved ground is seen lto consist of a block 10 madeof any material into which nails or screws may be driven and is formed with a face 11 to which may bey nailed a facing strip, molding or the like wooden building partV 12 after the plastering'l has been applied to the wall. The blockis further formed with an enlarged base 14 to which is attached a strip of some suitable Awaterproofing material 1.5. In the particular construction shown in the drawing, this waterproofing strip is attached to the base ofl the screed by some suitable adhesive means such :as a coating 16 of some asphal tie cement and is composed preferably of several layers 17 of felt or fabric saturated with a hot bituminousy compound and cemented together to secure structural strength. This construction waterproofs the spot ground fromV the wall or other 5 structure 18 to which it is attachedV and thus preserves it from deterioration'. As will be clear ,from the drawing, the outer surface of the waterproofing strip 15 is coated with a layer of quartz or silica preferably made up of pebbles 19, and the screed thus presents a rough irregular Vsurface to the adhesive means 20, such as plaster of Paris, whereby it is secured to the wall -or other structure at any desired point. As will be readily understood, the bond between the cement 2O and the waterproofing strip is materially increased by the irregularities in the surface 19 and thus the screed may be positively and firmly secured at any desired point. v In the modified form shown in Figs. 5 and 6, the waterproofing layer iscircularin form and has portions 21 extending beyond the base Yboth faces of which kare pebbled. lThis construction presents a larger bonding area and permits of the formation of the perforations 22 in said extended portions through which some of the cement may be squeezed when the screed is pressedthereinto, to aid in more effectively securing the screed therein, by the spreading of the ceL ment over the under face of the waterproofing strip. Y

In another modiliedform shown in Fig. 4, the base 12 is circular and has perforations 23 to register with the smaller per- `forations 22 in the circular waterproofing layer attached thereto.

In still another modifiedpform shown in Fig. 7 the sides of the screed are formed with dove-tail recesses 24, into 'which the plastering 13 enters to form a wedge to aid in morefirrnly securing the screed.v In this form the waterproofing layer extends around the sides of the screed up to the dove-tail recesses as shown at 25 in the figure. Y

In Fig. 3 a form of screed is shown which is specially adapted to serve as a furring strip when. it is desired to waterproof inner plastering 26 from an outer exposed wall or other structure 27. The screed for this purpose has additional waterproofing material 28 on its sides and exposes only one face to which the lath or plaster board 29 maybe nailed. Y

A. furring strip constructed inthis way is, of course, more durable and clearly effects better superstructural waterproofing than that hitherto hadV with'the ordinary metal covered wood furring strips to which all the objections raised against Vmetal backed screeds apply with even greater force, due to the presence of moisture in much larger quantities.

I-Iaving thus described my invention, I claim as new and desire to secure by Letters Patent 1.V A spot ground for concrete or similar floor, wall, or partition construction comprising afiber block, -said iiber block formed with a face for nailing wooden building parts thereto, and having an enlargedba'se 75 and a nonmetallic waterproofing strip attached thereto, said strip having an exposed rough pebbled surface.

2. In combination with a concrete or similar supporting structure, and adhesive means disposed at any desired point thereon,

a spot ground adapted to be attached to said' structure by said adhesive means, said spot ground comprising a fiber block and a strip of nonmetallic waterproofing attached thereto along one face of the former, there being a pebble layer attached to the other face thereof whereby the latter presents a rough surface to said adhesive means to form a firm bond therewith,

3. In combination with a concrete or similar supporting structure, and adhesive meansdisposed at any desiredpoint thereon, a spot ground adapted to be attached to said structure by said adhesive means, said spot ground comprising a ber block, said fiber block formed with a face for nailing auxiliary 'building parts thereto and having an enlarged base portion and a nonmetallic waterprooflngstrip attached thereto and ex.- tending beyond the sides of said base, the extended portions of said strip being Vprovided with perforations for the passage of said adhesiveV means therethrough, and .an :1

outer layer of'small hard particles on each 105 face thereof to present an irregular lsurface to said adhesive means for forming a firm bond with Said adhesive means.

4c. In combination with a concrete or simis lar supporting structure and adhesive'means 110 ldisposed at any vdesired point thereon, a spot ground adapted to be attached to said structure by said adhesive means, said spot ground comprising a fiber block, said ber Vblock formed with a face for nailing wooden 1 15 building 'parts thereto and having an enlarged base portion and a nonmetallic waterprooiingstrip attached thereto, said wateri proofing strip and base portion having perx `forations therein for the passage of said adhesive means therethrough, and an outer layer of small hard particles on each face thereof to present an irregular surface to saidadhesive means for forming a firm bond with Said adhesive means.

I superstructural waterproofing, in combination with an exposed structure, an

vintermediate lining strip and an inner plastered layer to be waterproofed from said ex- 1 posed structure by theV furring process, a

urring strip adapted to be secured between said structure and lining strip to form an air space therebetween, said furring strip cornprising a liber block covered with a layer of waterproofing material, the outer face thereof being coated with a layerrof small hard particles to present a rough surface, one face of said block remaining exposed for the attachment of the lining strip and plastered layer thereto in spaced relation to said eX- posed structure.

6. A spot ground for building construction comprising a fiber block formed with a face for nailing wooden building parts thereto and having an enlarged base and a water proof strip attached thereto, said strip vcomprising layers of fabric saturated with a bituminous compound and cemented together, the outer layer having an exposed rough pebbled surface.

Signed at New York city, in the county of New York, and State of New York, this tenth day of March A. D. 1917.

AARON C. HORN.

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