US88735A - Improved shoe-jack for finishing - Google Patents

Description

inl i ,time @stent- @five JOHN PLUMMER, OF BINGHAMTON, NEW YORK.- Lnm Patent No. constructed .rml o, 1869.

IMIPROVD SHOE-JACK FOR PINISHING- SHOES.

To all whom 'it ma/y concern ing cylinder, supporting-arm, and vise, or clamp..

. Figure 3 represents the stationary jaw of the vise.

Figure 4 shows the ratchet and double pawl, for holding the work ill-position for finishing the heel.

Figure '5 is the movable jawof the vise.

Figure 6, the thumb-nut, with the spiral pressurespring projecting from its chamber.

Similar letters of reference indicate corresponding parts in each figure. v

The nature of my invention consists in the construction of a jack, for'holding and finishing shoes, whereby the work may be accomplished with greater facility and precision, and with less liability to derangement, than others now in ordinary use.

AI accomplish this by means of a combination of the ratchet and double pawl, vise and clamp, arranged for changing the work from right to left, thumbnut spring,

for holding the movable working-arm in position, when the screw-nut is loosened, curved arm, for holding the toe-piece, or pad, whereby it may be adjusted to anysized last, and the vertical spiral spring, for holding the Vlast in position.

I mount m'y shoe-jack upon a pedestal, A, of castiron, or other suitable material, which may be attached tothe bench, or left free to be moved from 'one position to another.

To the base of` this pedestal, I attach-an uprightV support, of wood or metal, and to the top of this support, I attach a vise, B, or clamp, with rounded jaws.v

On the lower part of the stationary jaw O, I make a square recess, forthe corresponding part of the movable jaw D to work in, for the purpose of preventing it from moving round, while changing thev position of the last-frame. l' v I then iit the rounded end of the arm E, to the jaws vof the vise, the centre-screw of which forms the axis The last-frameconsists of a revolving cylinder, H, supported by and working in projections I I from the arm E, for the purpose of turning theshoe horizontally.

Ialso `make two projecting arms from the top of the cylinder, which support the last.

The arm J isV made in the form of a curve, to correspond with the curve of the last, from the instep to the toe, for the purpose of adj listing the toe-piece K to anysized last, without changing its horizontal position.

The other arm L is jointed with the lever, which -'connects with the spiral spring M, the lower end of which spring is attached to the ratchet N in the lower end of thecylinder, thereby reversing the 'operation of the spring, from others in use, making it more eiiective, and less liable to derangement.

The ratchet is itted to the lowerv end of the cylinder, `and held in position by the tension ofthe spiral spring, and prevented from turning in the cylinder, by the wings O O, tted into corresponding slots.

For the purpose of holding the work in position for shaving and finishing the heel, I 'make the ratchet and double pawl P I as representedby-fig. 4.

The stop R, as shown by fig; V3, when in contact with the projection S, from the hub, will hold thework in the position represented by the dottedv figure, as shown vertically, on the' axis of the vise'B, or, horizontally,on

the axis of the revolving cylinder H, and forthe purposeof 'holding the work in the required'position for shaving and finishing the heel, I use the ratchet and pawl-N P.' l

If the operator should be left-handed, the operations of the jack may be reversed, by simply changing its position, by detaching from the vise B, changing its front, and reattaching.

If the size of the shoe to-be finished should be larger than usual, the toe piece K' may be moved further out on the arm J, and fv'ioe versa,- and held in position by a thumb-screw.

Having thus described my invention,

What I claim, and desire to secure by Letters Fatent, isp The vise, or clamp B, ratchet N, double-pawl P, in combination with the spiral spring G, in the thumbnut F, curved arm J', toe-piece K, stop R, and projection from the hub S, all being constructed as herein described and represented, for the purpose'set forth.

JOHN E. Pnnnnnnn.

Witnesses SAML W. BUSH, WILLIAM CUNNINGHAM.

Images