US1237270A - Roofing-fastener. - Google Patents

Description

bent at irren smarts rara ernten.

HERBERT ABRAHAM, 'or NEW "YORK, N. jY., AssreNon 'ro THE STANDARD PAINr COMPANY, 'a CORPORATION or NEW JERSEY. l

ROOFING-FASTENER.

Maaate. l

To cl3 rwlwm t may concern.' Y

c Be it lmown that I, HERBERT ABRAHAin,

a citizen of the United States, anda resident of the city, county, and State of New York, have invented certain new and useful provements in Roofing-Fasteners, of which the' following is a specification.

My invention relates to devices for fas'- tenin sheets of flexible prepared roofing to the sgeathing of aproof. Formerly roofing sheets were generally fastened by applying cement in lthe lapped seams and then nailing at intervals ods were objectionable inovercome those objectionsby em loyin various forms of arched cleats. uch c however, possess the disadvantage that usually'have a communicating channel1between the various nails so that in case one of the nails becomes loosened, or in case the cleat does not lay perfectly flat, water will gain access underneath the cleat and follow the nail hole through the roofing sheet. Moreover, in certain cases, the roof boards 'i are not all of exactly the same thickness, in which event the cleat, being rigid and inflexible, will be canted, thus permitting water to flowin under its edge and leak through the roof.

The objects of my invention are to lprovide a fastening strip which avoids the objections hereinabove set forth and which is constructed to apply a lirm and uniform pressure on the roofing sheet while having sufficient flexibility to accommodate for eats,

slight irregularities in the surface of the roof caused by uneven thickness of theroof- :5 ing boards.

1 A fastener constructed according to my invention is cheap and simple to manufacture, lightl in weight, and it has the YVfurther advantage that it may be readily right angles without materially either withlarge headed nailsalone, or with small 5 headed nails to ether with metal caps.

the use of cement toy form they l spammen. of Lettersratnt. pat-@med Aug, 219 im?, Application med June 19, 1915. serial Nmeaoav. l,

altering its cross-section so asto adapt it for use for flashing at the edges of the roof. In the accompanying drawings illustrating the invention Figure 1 is a perspective view of a section of a roof showing ,the rooting sheets secured with lfasteners embodying my invention. p

Fig. 2 is a bottom plan view of-a portion of a fastener in full size. Fig. 3 is a longitudinal section through a portion of a fastener and a roof.

Fig. 4 is a cross-section on the line -a ofFigB.-

Y Fig. 5 is a cross-section on the line b-b of Fig. '3. v

Figs. 6 and 7 are detail longitudinal and transverse sections ofa modification'of the fastener, and

Fig. 8 is a bottom plan view of the same. Similar reference characters referl to similar parts throughout the'several views.

Referring to the drawings, 14 indicates a section of a roof having sheets 2 of flexible prepared roofing applied thereon with their adjoining edges overlapped to form the seams. p

3 designates the fasteners which are each made of a rod or strip of wire or other suitable lieXible metallic material having a uniform cross-section throughout its length. The cross-section is such that the lower portion of the strip which presses'against the roofing sheet will have a narrow bearing surface so-that,vwhen the fastener is nailed to the roof the effective pressure of the nails will be uniformly exerted over a single contact surface of narrowl width whereby to firmly bind or press the parts of the seam together. In practice I have found it preferable to employ a round wire in the construction of the fastenersas wit-h such a wire the bearing surfaceis reduced to substantially a single line and I am enabled to obtain a vmaximum binding pressure with a minimum quantity of nails.

At intervals the vertical thickness of the wire is reduced to form a plurality of nailing portions 4 having their lower faces 5 substantially flat and smooth, and arranged in a plane common with the bearing surfaces also having integral that when the strip is applied to a level surface it will contact therewith'throughout its entire length. The flattened portions each have a hole or perforation 6 formed in the center thereof, through which the nails 7 are driven in applying the fasteners to a roof.

The holes 6 are preferably Iliade of a diams" eter just sufficient to permit of the passage of the Shanks of the nails. In the modification illustrated in Figs. 6, 7 and 8 the central part of each of the nailing portions 4 is given a concavo-conveX shape having a surrounding annular flat bearing surface 5.

I f desired the strips `may be entirely covered with a suitable coating to prevent corrosion of the metal, as by being galvanized, sherardized or coppered.

Having reference to the drawings, it will be apparent that when the strip is fastened to the roof each of the nails is entirely surrounded with a metal body 4 having a flat and smooth bearing surface 5 which is pressed tightly against the roofing sheet and acts as a dam or barrier to pre-vent water from reaching thc nail and leaking through the nail perforation in thevsheets even if the nail should become loosened from any cause. Y

The strip is capable of being readily bent at any point between adjacent nailing portions 4, without materially altering its crosssection, so as to adapt it for use for flashing at the edges of the roof as shown in Fig. l of the drawings, or against chimneys, etc.

It is customary in the trade to furnish so called trimmings, consisting of nails or other fastening means, with the rolls of roofing and accordingly it is highly desirable that the fasteners should be light in weight and of a size and shape convenient to handle. My improved fastener complies with these conditions and is adapted to be cut into straight lengths which may be inserted into the hollow core of the roll for shipment.

I am aware that prior to my invention wirefroong fasteners have been devised having loops for receiving the nails and points sharpened accessory to the nails but such fasteners are objectionable in that the holes made by the sharpened points or nails are inadequately protected and water will eventually leak through the roof owing to the enlargement of the holes which is caused by the eXpansion of the roofing.

My improved fastener provides a single bearing surface between nailing points whereby the pressure is concentrated along a line of narrow area thus obtaining a highly effective clamping action on the sheets and firmly uniting the parts of the seams so as to prevent buckling or leakage without the necessity of using cement in the joints. Furthermore as the flattened nailing portions contact with the roofing sheet at all points around the nail holes, which holes are tightly plugged by the Shanks of the nails, leakage at the nailing points is prevented even if the nail perforation in the sheet becomes slightly enlarged.

I claim:

1. A nailing strip for fastening flexible roofing sheets, consisting of a metallic strip having depressed flattened areas at intervals along its length, and having a single narrow bearing surface engaging primarily along its midwidth between the flattenedl vening portions, whereby the strip is adapted to contact with the sheets upon which it is applied throughout its entire length and to bear thereon, along' a single narrow bearing surface, between the nailing points.

2. A nailing strip for fastening flexible roofing sheets, consisting of a metallic strip having depressed flattened areas at intervals along its length, and having a single narrow bearing surface forming substantially a line contact between the flattened areas, the central portions of the flattened areas being upwardly dished and having holes for tightly receiving the shanks of the securing nails, and having their lower faces in the plane of the bearing surface of the intervening portions, whereby the strip is adapted to contact with the sheets upon which it is applied throughout its entire length and to bear thereon, along a single narrow bearing surface, between the nailing points.

A nailing strip for fastening flexible roofing sheets, consisting of a metallic strip having its lower portion transversely conveXed and extending in a straight line, and having perforated widened depressions at intervals, the lower faces of the. depressions being in a common plane with the lowermost line of the intervening portions and being adapted to contact flatly with the sheets upon which the strip is applied to prevent ingress of water at the. nailing points.

4. The combination with a roof sheathing and a il'ilurality of overlapping sheets of flexible roofing material, of nailing strips for securiiig the sheets to the sheathing, said strips having perforated vliattened depressions at intervals, and having a single narn row bearing surface. between the depressed in the perforationso the depressedA areas and having enlarged heads Which abut against the upper facesl of said areas to prevent ingress of Water. around the nail Shanks. v-

' 5. A, naiing strip for fastening flexible roofing sheets, consisting of a wire strip* having attened portions at intervals along its length, said flattened portions being sub'- 10 stantially 'rectangular ,inv transyerse section and perforatedl totightly, recelve the shank Witnesses: v h LESTER F. 'DITTENHOEFER j l..

of securing nails,v one of the perforated sides of said flattened portions being in the same plane with an uniattened portion of 'said strip.

`In' testlmony whereof, -I have lhereunto aixed my signature in the presence oftwo. Y subscribing witnesses.

HERBERT ABRAHAM-.f

GRACE M.

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