US2126622A - Nail holding building composition - Google Patents

Description

Aug. 9, 1938,

C. F. DAVIS NAIL HOLDING BUILDING COMPOSITION Filed June 1, 1955 INVENTOR.

ATTORNEY.

Patented Aug. 9, 1938 I g i 2,126,622

UNITED STATES PATENT OFFICE NAIL HOLDING BUILDING COMPOSITION Clarke F. Davis, Short Hills, N. J., asslgnor to American: Cyanamid & Chemical Corporation, New York, N. Y., a corporation of Delaware Application June 1, 1935, Serial No. 24,513

2 Claims. (01. 72-115) The present invention relates to a building In the drawing:

material. Fig. l is a sectional view of a building unit The principal object of the invention is the constructed according to this invention;

provision of a light, cheap building construction Fig. 2 is a partial perspective view showing a a unit, which will have superior nail holding qualimethod of waterproofing a core; 5 ties such as that of wood, although made Fig.,3 is a view similar to Fig. 2 showing an primarily of a cast composition. alternative method of water-proofing.

It has been proposed to make studding of such Referring now to the embodiment illustrated, a cementitious material as gypsum, hydraulic cenail holding core is shown at l which may be m ment, lime or concrete, but experience has shown of any shape and of any material which will have that units made of such composition have very these qualities, although wood is preferred bepoor nail holding qualities and nails driven therecause of its ease of working, availability and into have a tendency to loosen up under any sort cheapness. If the core is of a water absorbent of vibration, while at the same time the cementinature, then it is suitably treated to make its tious material of which the studding is made has exterior water repellant 0r Water-Drool and this 15 a tendency to crack and spall when nailsare treatment is indicated at 2. It maybeimmersed driven thereinto. in a bath of any suitable water repellent com- It has been proposed to imbed wooden slats positions, either with or without heat and either in such composition studdin so as to take the at atmospheric or h h r pr s. i impr benefit of the nail holding qualities of the wood. nation further than at the mere surface is de- 20 Experience in the field has demonstrated that Sired- If Such Water-Proof c p t on as this teaching is not altogether satisfactory due asphaltum are to be Used. mere Surface t to the fact that such wooden inserts have the merit Such as y Painting 0 he l e as e tendency to absorb water from the cementitious fOllhd be Sufliciehtr ,25 mix cast therearound with the result that upon Where Sheet t -p flofl g material is used, drying, such insertsv warp and/or swell with 511611 aswater-prflof D e". eta c s eet consequent cracking of the cementitious exthe like, they y be pp d in he manne terior. as in Fig. 2, where the sheet 3 is wrapped around Experiments over a, long period of ti h the core I and. the loose flap 4 made to overlie demonstrated that a studding of cementitious p 5 and Suitably ted n P ac s y 30 material having a wood core may be very satismeans of asphaltum, water 8 88.0 y Suitable factorily employed which is not subject to the adhesive mediumabove deficiency if the core is treated prior to Thus d, e e ay be then P aced n a casting the cementitious material therearound, Suitable mold and Plastic cementitious mix with a water-proofing composition or material capable of a Set cast therefllouhd to form an 35 to prevent water absorption. terior 6. Due to the fact that the core has been To this end, the invention contemplates treated to prevent water absorption, the core is building unit having a nail holding core of wood, s p ve fr m ro i he xt ri r l y nailable concrete, wood pulp or any composition 6 of its ater dur g its p as Stage, While at 40 which has nail holding qualities more superior the m i he c r is pr vented from swell- 40 than that of the unit itself, coated or lmpreging due to any Water absorptionnated with water repellant material such as Units so constructed should, of coursebe so asphaltum compositions, pine oil, water-proof proportioned as to make the holding core coating compositions of the synthetic resin type, near enough to the surface the as to be watebmoof Cellophane, or other sheet mate reached by the nails driven thereinto and this is rial such as metal foil or the like, the thus waterg g zggg g fg zgi g i zgi ig g 3 g; 5 proofed core being encased in a cementitious v are to be put. material such as gypsum either with with When nails are driven through the cementitious y out fibrous admixtures hyd! 311116 cement. lime material i'into the core I, the fact that the end 50 o c e eof the nail is securely held in the core, makes The invention further consists in the novel available not only such abilities attributable to arrangement d s t n O parts mo the core alone, but also makes available the full fully hereinafter shown and described in the nail holding abilities of the cementitious mateaccompanying drawing. rial. This would not be true if the nail were 55 permitted any amount of movement or vibratlon.

While in the above specification certain cementitious compositions have been mentioned as the encasing material, certain water-proofing treatment has been mentioned. and certain nail holding compositions have been enumerated, yet it is to be understood that the invention is in no wise to be limited to these particular materials as they are mentioned merely as illustrative and the invention is to be construed broadly as directed to the combination of a nail holding core which is water absorbent either due to porosity. absorption, adsorption. or its cellular nature, treated either on its superficial surface or impregnated with a material which will prevent water being taken up by the core, the core and its treatment being encased in any watercontaining plastic mix which will take a set.

In like manner, the unit as a whole is not to be limited to studding. but is to be construed broadly as directed to any type of construction in which the above elements occur.

I claim:

1. As an article of manufacture, a nail holding core having on its superficial surface a sheet metal material impervious to moisture, and a surrounding nail penetrable set cementitious layer.

2. The article of claim 1 in which the encasing cementitious layer is gypsum.

CLARKE F. DAVIS.

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