US2087881A - Fastening - Google Patents

Description

July 27, 1937. E. H. BASTABLE FASTENING Original Filed April 5, 1935 //Vl/E/\/ TOR ZM/ ham Patented July 27, 1937 mm STATES Ar r or ies signor to United Shoe Machinery Corporation,

Paterson, N. 3., a corporation of New Jersey Original application April 5, 1935, Serial No. Divided and this application March 13, 1936, Serial N0. 68,736

1 Claim.

This invention relates to fastenings, it being especially adapted for use in the assembly employed in performing the method described and claimed in the application for Letters Patent of the United States for improvements in the Art of attaching heels to shoes, filed in my name on April 5, 1935, and bearing the Serial No. 14,893, of which this application is a division.

In the attaching of shoe-heels, and particularly those of wood, it is a common practice to interpose an adhesive between the heel-seat-surface of a shoe and the cup of a heel which is to be applied thereto, and then to fix the heel temporarily in place by a screw-fastening until said adhesive has set. After this, the temporary fasteningis removed, and permanent fastening means, as a screw or nails, inserted. On account of irregularities of the heel-s'eat-surface, and lack of correspondence between the contours of 2 said surface and the cup of the heel which is to be seated thereon, it is difficult toobtain proper contact between the surfaces and therefore an adequate adhesive bonding. This difficulty is overcome by the improved method above mentioned and by the last-and-screw assembly employed in performing said .method. The present invention has as an object the provision of a screw or like integral fastening so formed as to be capable, in such a connection, of applying to a 30 shoe and its heel forces which will both urge the heel-seat-material into the cup of the heel and at the same time draw together the periphery of said cup and the heel-seat. This fastening has an elongated, cylindrical head, a screwthreaded shank of substantially the same length as the head and an intermediate hub. There are two annular shoulders between the head and shank, the shoulder farthest from the shank being the larger and gradually inclined toward the hub. This last-mentioned shoulder is for engagement with the last, while the other will contact with the inner surface of the heel-seat of a shoe upon the last. The threaded shank co-operates with the shoulders, when the fastening is in use, to draw a heel toward the parts engaged by said shoulders.

In the drawing,

Fig. 1 is a side elevation, with parts broken away and shown in section, of a shoe mounted on a last with which my improved fastening is to be employed;

Figs. 2 and 3 are fragmentary sections showing the rear portion of the last and shoe, the fastening means being associated with them and occupying, respectively, its initial and final positions;

Fig. 4 is an fastening; and

Fig. 5 is a side elevation of a drill suitable for the formation of a hole for the reception of the fastening.

Referring to the drawing, the numeral l designates a last which may be of the usual type, except for such details as are hereinafter described pertaining to the present invention. As shown herein, it has the usual spindle-hole '2 and the nail-clinching plate 3 secured to the heel-seat portion. Upon the last appears a shoe S. 15

In accordance with my invention, the rear part of the last is provided with a substantially vertical bore or passage it, which, for example, may be about 0.31" in diameter. The clinch-plate has a circular opening ii, substantially concentric with the bore it and being somewhat smaller in diameter, for example about 0.21, to provide an annular shoulder l2 which is in effect integral with the last.

enlarged side elevation of the My improved fastening i i preferably consists 2 7 of a unitary piece of case-hardened steel having a cylindrical head it, which is furnished with means, such as a slot 56, for receiving a screwdriver or like tool. The diameter of the head is such as snugly to fit the bore iii of the last, it being greater than the diameter of the opening I I in the clinch-plate 3. The head-diameter may be about 0.30". The inner end of the head terminates in an annular inwardly beveled abutment or shoulder i8 engageable with the shoulder I! of the last, as shown in Fig. 3. The bevel of the shoulder it facilitates the introduction of the fastening into the last-bore and furnishes more extended contact with the inclined surface of the shoulder l2. Next to the head is a cylindrical hub Hi, this being slightly smaller in diameter than the opening in the clinch-plate, for example 0.195" to 0.200", the end 20 of the hub providing a second flat abutment or shoulder to engage the insole of a shoe on the last. The length of the hub maybe varied in accordance with the heel to be attached, the thickness of the clinch-plate, etc. In all cases, it should be such as to project outwardly beyond the clinch-plate a distance suflicient to force the heel-seat material of the shoe S by contact of the shoulder 20 into close engagement with the cup of the heel to be attached. The shank or end 22 of the fastening l4 opposite the head is screw-threaded, the length being substantially that of the head l5 and such as to enter the heel far enough to insure a firm grip, while its pitch may be substantially the same as an ordinary No. 10 woodscrew.

A drill 25 used to form a hole in the work to receive the threaded shank 22 should be of a size which will pass freely through the opening II in the plate 3, for example about 0.185" in diameter. The drill is shown as provided With a shank 2? fitting the bore it of the last. Preferably, the end of the shan'x adjacent to the drill furnishes a shoulder 28 engageable with the last-shoulder l2, thus providing a stop which limits the depth of the hole to be drilled. The drill may project outwardly beyond the shoulder 28 a distance sufiicient to penetrate to a depth of approximately 0.5 into a heel applied to the heel-seat of the shoe S.

My improved fastening may be utilized to perform the method already outlined in substantially the following manner: An insole (iii, outsole 3!, upper 32 and, if desired, a shank piece 33 of the shoe S are assembled about the last i with the margin of the upper turned over on to the under surface of the insole and secured thereto, as, for example, by lasting tacks. The upper 32 may be understood to include an outer element, lining, doubler and counter, if such parts be employed. The shoe S may have the outsole secured in any desired manner to the lasted insole and upper, and the rear part beveled at its edges to provide a suitable heel-seat.

for the cup of the heel 35, as 'is customary. Having prepared the shoe as above outlined, and assuming that it is otherwise ready for the attachment of the heel, a coating of an adhesive to may be applied to the heel-seat-surface of the sole or to the cup-surface of the heel or to both, and having clamped the heel in contact with the heel-seat, the drill 25 is introduced through the bore H3 and rotated to provide a hole 12 which extends through the insole outsole 3i and shank-piece 33 and into the heel as shown in Fig. 1. The engagement of the drill-shoulder 28 with the shoulder E2 of the clinch-plate, because of the substantially unvarying position of the stop which it furnishes upon all lasts, determines accurately the depth of the hole. After the drilling operation has been completed and the drill withdrawn, the fastening M. is inserted, and by means of a screw-driver or other tool is rotated to cause the shank 22 to cut its way into the wall of the heel-opening 32, forming a thread therein. During the movement of the fastening, the heel is drawn toward the last by the engagement of the shoulder l8 with the shoulder l2 of the'last. By reason of the engagement of the shoulder N of the fastening with the insole of the shoe, the heel-seat is simultaneously forced away from the last into close contact with the cupped surface of the heel, as will appear by a comparison of Figs. 2 and 3. As the force exerted by the shoulder 18 of the fastening'is against the clinch-plate, rigidly secured to the last, a very powerful clamping action is exerted and the heel is firmly drawn against theheel-seat with sufiicient pressure to produce a tight crease and to enable the adhesive, while setting, to develop its maximum holding effect. After having maintained the engagement between the heel and heel-seat long enough for the adhesive to set thoroughly, the fastening I4 is removed. 7

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is;

An integral fastening for use in temporarily securing a heel to the heel-seat of a shoe mounted upon a last provided with a clinch-plate, said fastening comprising an elongated, cylindrical head of substantially uniform diameter throughout its length, a cylindrical hub of less diameter and less length than the head and projecting therefrom, the head terminating at its inner end in a shoulder inclined gradually toward the hub and arranged to engage the clinch-plate of the last and said hub having at its inner end a flat shoulder of less diameter than the inclined shoulder and arranged to engage the heel-seat portion of the shoe upon the last, and a. threaded shank of less diameter than the hub and projecting therefrom, the shank and head being of substantially the same length.

EDWARD H. BASTABLE.

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