US310470A

US310470A - spencer

Info

Publication number: US310470A
Authority: US
Publication date: 1885-01-06
Anticipated expiration: 1902-01-06

Description

(No Model.)

B. E. SPENCER. JACK FOR HEEL BURNISHING MACHINES.

Patented Jan. 6, 1885.

INVENTOR Q Mrwd l. m: mew

WITNESSES:

M ATTORNEYS N. PETERS, mmmunm m p UNITED STATES EDIVARD E. SPENCER,

PATENT OFFICE.

OF NEIV YORK, N. Y.

JACK FOR HEEL-BURNISHING MACHINES.

SPECIFICATION forming part of Letters Patent No. 310,470, dated January 6, 1885.

Application filed October 30, 1884.

- To all whom it may concern:

in jacks of that class which consist of a heelsupport, a clamping-bar, and a cam-lever for actuating the clamping-bar.

Hy improvement consists in the combination, with the heel-support, the clamping-bar, and the cam-lever, of a yielding friction-stop which serves to retain the cam-lever in its locking position against the jar of the bnrnisher.

In the accompanying drawings, Figure 1 is a sectional side elevation of a jack provided with my friction-stop. Fig. 2 is a transverse section in the plane a." x, Figs. 1 and 3. Fig. 3 is a horizontal section in the plane 3 9 Fig. 2.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates the heel-support of a jack, such as is in common use in heel-burnishing machines known as Tapleys heel-burnishers. Bis the clamping-bar, which is exposed to the action of a spring, 0, that has a tendency to throw the clamping'bar back. Dis the cam-lever, which serves to move the clamping-bar forward, so that the same acts upon the heel and presses the same firmly up against the heelsupport A. The lever D has its fulcrum on a pivot, a, which has its hearings in lugs b, secured to or cast on an arm, 0, extending from the heel-support. The cam portion (1 of the lever D is'made in the form of a segment, and it extends through a slot, 0, in the clan'iping-bar. By moving the lever up to the position shown in the drawings the clamping-bar is moved forward so as to clamp the heel; but when the machine is in operation the jar produced by the burnisher isliable to cause the lever to sink down in the direction of arrow 1, Fig. 2, and the heel becomes loose.

(No model.)

7', which formsthe bearing for the clampingbar B, and round it is wound a spring, 70, the tension of which can be regulated by a nut, Z, fitted on the outer end of the pin 1'. The head of the button f is faced with leather or other equivalent material, and by the action of the spring 70 this head is depressed upon the convex surface of the cam (Z. By adjusting the tension of the spring k the pressure exerted by the button f upon the convex surface of the cam d can be so regulated that the cam-lever D is securely retained in its locking position. The pressure of the button f is yielding, so that by applying sufficient force the cam-lever can be moved from its locking position to its unlocking position, and vice versa, without compelling the person tending the machine to raise the button or to perform any motion not required in the ordinary bu wishing-machine.

It will be readily seen by any skilled mechanic that the form of the yielding frictionstop can be changed in various ways, and I do not wish to confine myself to the precise form shown in the drawings.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

The combination, with the heel-support A, the clamping-bar I5, and the camlever D, of a yielding friction-stop adapted to bear against the cam-lever, substantially as described.

In testimony whereof I have hereunto setmy hand and seal in the presence of two subscribing witnesses.

EDIVARD E. SPENCER. [11. s]

IVitnesses:

-'WM. 0. Boris,

Emvn. F. Fanxrxe.