Патент USA US2126622код для вставки
Aug. 9, ‘1938, C. F. DAVIS ' ‘2,126,622 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. , ’ The principal object of the invention is the provision of a light, cheap building “construction a unit, which will have superior nail holding qualities such as that of wood, although made primarily of a cast composition. It has been proposed to make studding of such cementitious material as gypsum, hydraulic cem ment, lime or concrete, but experience has shown that units made of such composition have very poor nail holding qualities and nails driven thereinto have a tendency to loosen up under any sort of vibration, while at the same time the cementi15 tious material of which the studding is made has a tendency to crack and spall when nailsare driven thereinto. It has been proposed to imbed wooden slats _, in such composition studding so as to take the 20 bene?t of the nail holding qualities of the wood. Fig. l is a sectional view of a building unit constructed according to this invention; Fig. 2 is a partial perspective view showing a method of waterproo?ng a core; 5 Fig.,3 is a view similar to Fig. 2 showing an alternative method of water-proo?ng. Referring now to the embodiment illustrated, a nail holding core is shown at l which may be of any shape and of any material which will have 10 these qualities, although wood is preferred be cause of its ease of working, availability and cheapness. If the core is of a water absorbent‘ nature, then it is suitably treated to make its exterior water repellant 0r Water-Drool and this 15 treatment is indicated at 2. It maybeimmersed in a bath of any suitable water repellent com positions, either with or without heat and either at atmospheric or higher pressures. if impreg nation further than at the mere surface is de- 20 Experience in the ?eld has demonstrated that Sired- If Such Water-Proof compositions as this teaching is not altogether satisfactory due to the fact that such wooden inserts have the asphaltum are to be Used. 8' mere Surface treat merit Such as by Painting 01‘ the like has been tendency to absorb water from the cementitious fOllhd ‘30 be Su?icieht- ,25 mix cast therearound with the result that upon drying, such insertsv warp and/or swell with consequent cracking of the cementitious exterior. ' Experiments over a, long period of‘ time have “ r Where Sheet water-pl‘?o?hg material is used, 25 511611 aswater-pr?of “C8110Dhahe". metallic sheets 01‘ the like, they may be applied in the manner as in Fig. 2, where the sheet 3 is wrapped around the core I and. the loose ?ap 4 made to overlie 30 demonstrated that a studding of cementitious‘ thel?ap 5 and Suitably Cemented in Place as by 30 material having a wood core may be very satisfactorily employed which is not subject to the above de?ciency if the core is treated prior to casting the cementitious material therearound, 35 with a water-proo?ng composition or material to prevent water absorption. ‘ To this end, the invention contemplates 8, building unit having a nail holding core of wood, nailable concrete, wood pulp or any composition 40 which has nail holding qualities more superior than that of the unit itself, coated or lmpregnated with water‘ repellant material such as‘ asphaltum compositions, pine oil, water-proof 45 coating compositions of the synthetic resin type, watebmoof “Cellophane”, or other sheet mate_ rial such as metal foil or the like, the thus water- proofed core being encased in a cementitious v material such as gypsum either with 01' with‘ 50 out ?brous admixtures’ hyd!‘ 311116 cement. lime or concrete- The invention further consists in the novel arrangement and Construction Of parts more fully hereinafter shown and described in the 55 accompanying drawing. means of asphaltum, water 811188.01‘ any Suitable adhesive medium Thus treated, the core may be then Placed in a Suitable mold and 8' Plastic cementitious mix capable of a Set cast there?l‘ouhd to form an 8X- 35 terior 6. )Due to the fact that the core has been treated to prevent water absorption, the core is thus prevented from robbing the exterior layer 6 of its Water during its plastic Stage, While at the same time. the core is prevented from swell- 40 ing due to any Water absorption Units so constructed should, of course- be so proportioned as to make the “an holding core near enough to the surface °f the “mt as to be reached by the nails driven thereinto and this is 45 gnglzgggevglfufge zgitsbgniezgimligego ‘37mg; 511:; are to be put.‘ When nails are driven through the cementitious y material i'into the core I, the fact that the end 50 of the nail is securely held in the core, makes ‘ available not only such abilities attributable to the core alone, but also makes available the full nail holding abilities of the cementitious mate rial. This would not be true if the nail were 55 2 permitted any amount of movement or vibra tlon. While in the above speci?cation certain cementitious compositions have been mentioned as the encasing material, certain water-proo?ng 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 10 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 15 nature, treated either on its super?cial surface or impregnated with a material which will pre vent water being taken up by the core, the core and its treatment being encased in any water containing 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 super?cial 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.