US1140335A - Last. - Google Patents

Description

J. W. McDEVlTTI LAST.

APPLICATION FILED 050.12, I913.

Patented May 18, 1915.

5a., PHOTO-LITHCL. WASHINGTON. D. c

PATENT @ldl JAMES W. T'ICDEVITT, CF BRJCKTON, MASSA ASSIGNGE Til ELLERY C. HEIGHT, OF BRGGKTON, MASSACHUSETTS.

LAST.

application filed December 12, 1913.

To all whom it may concern Be it known that 1, JAMES W. MoDnvrr'r, a citizen of the United States, and resident of Brockton, county of Plymouth, State of Massachusetts, have invented an improvement in Lasts, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

In the manufacture of block-lasts, i. 6. solid lasts having a removable instep block, it is customary to insert a fixed wooden dowel in the forepart of the last as a stop and means for holding the instep block in place. Ordinarily this dowel is of wood, and is fitted through a bored hole therefor, by a driving fit, and held in place by glue. This method, however, has been found to be objectionable, because the extreme leveling pressures applied to the bottom of the shoe sole, and through such sole to the last, caused the dowel to be driven or forced still further inwardly, often shearing the hold of the glue between the dowel pin and its socket. The driving fit of such dowel and socket also necessarily stripped ofi the glue from either the pin or the socket, so that an insufficient quantity was left to hold the dowel firmly against the leveling and other pressures received by the bottom of the last, the wooden pin being displaced by such pressures, in use, resul ing in a corresponding protuberance on the sole of the shoe made thereon. Furthermore, the alternate dampening and drying of the wood of the last, due to applying the shoe materials thereon when moist and in temper tended to loosen the hold of the dowel in its socket, as well as loosening the glue. In order to overcome the difiiculties just mentioned, it was necessary to have a blind dowel construction, 2'. e; first making a small bore up through the last from the bottom, in order to get the proper direction, and then counterboring from the top after the instep block had been sawed off. This enabled the dowel to be fitted down into the socket, but was a very expensive method of manufacture.

My present invention provides a blocklast with a wooden dowel which may have the socket therefor bored and the dowel be driven in from the bottom of the last, as in the prior construction above explained, and yet will provide means to prevent the dowel being driven further through its socket dur Specification of Letters Patent.

Serial No. 806,143.

ing leveling, etc, and which will also enable glue to to be firmly lodged within the dowel socket, and protect said glue from all stripping or shearing action.

in my improved block-last, T bore the socket therefore entirely from the bottom of the last, first boring through the same in the same manner as first above outlined, and then counterboring from the bottom, or I may prefer to provide the same bit with one portion to bore entirely through the last, and a second portion to effect the counter boring so that both sockets are made by the same operation, the counterbored socket being slightly larger than the bore going through the last. T then fit in the socket so bored a dowel having a shank portion to fit the through bore and a head of slightly greater diamet r to fit the counterbored portion of the socket and drive the same in from the bottom of the last in the same manner as formerly. The counterboring affords a shoulder within the socket and the enlarged head of the dowel is adapted to fit upon said shoulder, thus affording a firm mortised bearing, and preventing all further riving of the dowel during leveling, etc. Furthermore the head of the dowel acts as a means to hold the glue with which the socket or the dowel may be coated, and force the same in an accumulated amount upon the shoulder in the socket on which the head of the dowel sets. Thus the glue is enabled to secure a firm hold upon the dowel and last and unite the same in firm, solid, and permanent manner.

Other features of the invention, novel combinations of parts, and details of construction, will be hereinafter more fully pointed out and claimed.

Referring to the drawings, Figure 1 is a view of a block-last, partly shown in section; Fig. 2 is a side View of the form of dowel employed; and 3 is an end view of said dowel.

The last comprises the main part 1 and the removable instep block 2. The upper portion of the instep block and last are arranged to be united by the usual spring dowel, indicated in dotted lines at 3, and the lower part of the block 2 is provided with a recess or groove 4: to enable said block to fit upon the projecting portion of the dowel 5. This dowel is fitted firmly and glued into the lower part 1, secured in a bored socket provided therefor, having oneportion of the socket 6 of one diameter and the lower portion 7 of a greater diameter.

These sockets provide a shoulder 8 in the solid central portion of the d f the,

last 1. The dowel 5 is of corresponding form, having its main, or shank portion to lit the bore 6 with a close driving fit, and the head 9 of suitable diameter to fit the socket 7, an annular shoulder 10 being provided between the head 9 and shank of the dowel which fits on the shoulder 8 ofthe last in the socket. r

The bored sockets 6 and 7 of different diameters mav be formed in any suitable manner, as by boring the socket 6 entirely through the last portion 1, and then counterboring the portion of the socket 7 intended to receive the head 9 of the dowel. ,However, I prefer to employ a single bit to form this socket of two diameters, the first portion of the bit being of appropriate diameter to bore the part 6 corresponding to the shank of the dowel and the adjacent portion of the bit of enlarged diameter to form the socket 7 and shoulder 8, so that the entire socket may be formed at a single boring action, as above explained.

In fitting the dowel into the last 1, either the sockets or'the shank of the dowel are coated with glue, and thedowel is then driven into the socket, this action serving to force the glue on the shoulders 8 and 10, so that the dowel and last are firmly, solidly, and rigidly united, and any further driving or leveling action on the bottom of the last against the head 9 of the dowel simply acts to force these parts into closer contact, and cannot dislodge the dowel through any shearing action on the glued joint, as in former constructions. The socket 7 being preferably counterbored a suitable depth to receive the length of the enlarged head of the dowel, enables the latter to be driven in exactly flushwith the bottom of the last, or so nearly flush that in the finishing of the last a perfectly smooth, flush surface is presented. The dowel cannot be displaced or driven into the socket further by any pressures ordinarily applied'to the bottom surface of the last during shoe manufacture, and the provision of the shouldered joint also affords protection to the glue which holds the dowel in its normal position, preventing same from dropping out during the constantly alternating swelling and contracting or give and take of the wood.

Thus the dowel is maintained with its head flush with the bottom surface of the last against any tendency to be driven further in, and make a depression, orworking out and make a protuberance with relation to the last bottom.

Having described my invention, what I claim as new and desire to secure by Letters Patent is: Y I 1. A last having a removable instep block,

and a last-part to receive said instep block,v said last-part being provided with a bored. and counter-bored socket extending from. the bottom thereof and the instep block having a cooperating recess, the counter bore arranged to provide in the last-part an ani nular shoulder in the length of the socket, and a dowel fitting the bored and counterbored parts of the socket and having 'a shoulder bearing upon said firstmentioned shoulder, the dowel being driven in from and flush with the bottom surface of said last-part and projecting above the latter "to cooperate with said recess of the instep block, whereby displacement of the dowel below said surface during leveling machine ing a cooperating recess, the counter bore arranged to provide in the last-part an annular shoulder in the length of the socket, and a dowel fitting the bored and counterbored parts of the socket in both the lastpart and instep blockand having a shoulder bearing upon. said firstmentioned shoulder and glued in place, the dowel being driven V in from and flush with the bottom surface 7 of said last-part and projecting above the latter to cooperate with said recess of the instep block, whereby displacement of the dowel below said surface during leveling machine pressures and loosening of the w glued joint by machine pressures or by al-, ternate swelling and drying of thewood is prevented. V

In testimony whereof, I have signedmy name to thisspecifica'tion, in the presence of two subscribing witnesses.-

AM sw. MoDEVITT.

WVitnesses Gr. V. Soorr,

F. DURANT.

Copies of this patent may be obtained for flve cents each, by addressin g the Commissioner of latents, I Washington, D. G. r

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