US4587A

US4587A - Machine for lasting shoes and boots

Info

Publication number: US4587A
Authority: US
Publication date: 1846-06-20
Anticipated expiration: 1863-06-20

Description

,UNTTED sTATEs PATENT onirica.

MACHINE FOR LASTING SHOES AND BOOTS.

Specification of Letters Patent No. 4,587, dated June 20, 1846.

T all whom t may concern: movable thereon for the purpose of length- Be it known that I, SILAs HART, of New ening and shortening the screw.

Haven, in the county of Oswego and State L is a screw for holding the tube at any of New York, have invented a new and usedesired position on the shaft. 55 ful Improvement in Machines for Lasting The slide is a piece of metal containing Boots and Shoes, which is described as fola round opening in the center thereof correlows, reference being had to the annexed sponding with the cylindrical portion of the drawings of the same, making part of this male screw made to turn therein. It also Y speciication. contains two openings to admit the arms 60 Figure l is a plan of the machine. Fig. 2 which are `inserted therein, each opening is a plan of the slide detached from the containing an antitriction roller. The slide arms and screw. Fig. 3 is a view of one oi." is connected to the cylindrical part of the the arms and jaws. Fig. 4, section of the screw-shaft by collars and pins and remains extension tube. stationary during the operat-ionof drawing 65 The nature of this invention and improvethe arms through the openings therein.

ment consists in Contracting and expanding Operation: Turn the screw to the left the arms containing thejaws for gripping the until the nut to which the arms are jointed edges of the upper of the boot or shoe, by is near the slide, which at the same time ex means of a slide that embraces or encircles pand the arms; then bring the leather over 70 the arms, said arms being` moved toward or the last and insert the edges in the jaws and 'from the last simultaneously with the opsecure them by the screws ot the jaws. Turn eration of turning the male screw in a the screw to the right. This operation will female screw in the center of the nutl to cause the nutrand arms to recede from the which they are connected by which the angle last and bring the arms against the rollers 75 of the arms with the screw is diminished in the slide causing the arms to close toward in lasting the upper and increased in .unthe screw; at the same time drawing the lasting it by reversing the operation of the leather around the last, the power increasing screw, thus removing the objections existing as the angle decreases of the arms with the in the use Aof the machine where the arms screw until they are nearly parallel with 80 are expanded and contracted by a separate the screw. To unlast the upper it isafonly screw arranged at right angles to the main necessary t0 reverse the motion of the screw screw, and possessing the advantage of which also reverses the mot-ion of the nut drawing the edges of the leather inward toand arms. ward the shank and outward toward the The upper can be lasted more etfectually 85 slide simultaneously at the single operation and more expeditiously with this machine of turning the screw against the last. than by any other known means, one opera- A is the main screw turned against the tion being all that is necessary after the last by means of a crank handle or other leather'is secured by the jaws and the screw means. B the nut to which the arms are is adjusted. 90,

40 attached. C C the arms. D D the jaws. What I claim as my invention and desire E E the screws for closing the jaws. F the to secure by Letters Patent isslide for contracting and expanding the l. Combining the screw and slide with the arms. G a round opening in the center of jaws in the manner and :tor the purpose dethe slide through which the round part of scribed. 95

the screw-shaft passes. H H two antifric- 2. I also claim the movable section K in tion rollers for reducing friction in the opcombination with the screw as described. eration 0f the slide.

I is thelast and J the upper or leather to SILAS HART be lasted. Witnesses:

K is a section of the screw-shaft made WM. P. ELLIOT,

hollow and slipped over the shaft and made ALBERT JOHNSON.