US718934A - Nail. - Google Patents

Description

No. 718,934. PATENTBD JAN. 20 1903. E. H. IMLAY.

NAIL.

APPLICATION IILIID APR. 21, 1962.

Unrrnn STATES ATENT OFFICE.

EDIVARD II. IMLAY, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE-HALF TO ADELAIDE IMLAY HEWITT, OF MINNEAPOLIS, MINNESOTA.

N Al L.

SPECIFICATION forming part of Letters Patent N 0. 718,934, dated January 20, 1903.

Application filed April 21,1902. Serial No. 103,895. (No model.)

.-.0 all whom it nut/y concern.-

which are circumscribed bya cylinder which 45 Be it known that I, EDWARD I-I. IMLAY, a coincides with the body and point of the nail.

citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Nails; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it apro pertains to make and use the same.

My invention has for its object to provide a twisted nail of improved construction; and to this end it consists of the novel devices and combinations of devices hereinafter described, and defined in the claim.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Figure 1 is a view in side elevation, showing the nail before it has been twisted. Fig. 2 is a section on the line :12" 13 0f Fig. 1. Fig. 3 is a section on the line m 00 of Fig. 1, and Fig. 4 is a side elevation of the completed nail.

The numeral 1 indicates a wire nail which is of ordinary construction except that at its intermediate portion it is flattened and twisted in the following manner: The upper sec- 0 tion of the nail and the point are left intact or of the form given to an ordinary Wire nail, while a very considerable section of the nail is flattened, as indicated at 2. This flattened portion is preferably square in cross-section,

as best shown in Fig. 3. Where the squared portion joins with the short cylindrical section 1 at the point of the nail, there is formed a shoulder 1". (Best shown in Fig. 4:.) The squared or flattened portion of the nail is 40 twisted, as shown in Fig. 4, being preferably given about one complete turn. By reference to Figs. 1 and 2 it will be noted that the flattened or squared portion 2 of the nail has a cross -section the angular projections of In virtue of this construction the twisted or auger-like section of the nail cannot possibly cut a hole which is larger than the body of the nail. This construction I consider very 5o important.

I have found that a nail constructed as above described may be easily driven, but can be pulled out only when great force is applied thereto. When the nail is driven, it is rotated slightly, and to withdraw the same it must be given a reverse rotation. Furthermore, the shoulder 1 makes the withdrawal of the nail more difficult than if the same were not provided. When the wood sets around the driven nail, it will hold the same under very great friction. However, when the nail is driven it does not break the fiber of the wood to any great extent, but has more of a tendency to press the same laterally out of its path.

Nails may he formed as above described at small cost, and I have found in practice that such nails have greater holding efficiency than wire nails differently constructed.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

The wire nail 1 ,the body and the end portion 1 formed cylindrical and having the intermediate fiattened and twisted section 2, the cross-section of said flattened twisted portion having its corners circumscribed by the cylindrical surface coinciding with the body and end portions of the nail, said nail having also the shoulder 1 at the junction of said sections 1 and 2, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD H. IMLAY.

WVitnesses:

ELIZABETH KELIHER, F. D. MERCHANT.

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