US26932A - Richard a - Google Patents

Description

UNITED sTAipmsrArENr OFFICE.

RICHARD A. STRATTON, OF PHILADELPHIA, PENNSYLVANIA.

MACHINE FOR POLISHING LEATHER;

Speccaton of Letters Patent No. 26,932, dated January 24, 1860.

To all whom it may concern:

Be it known that I, RICHARD A. STRAT- TON, of the city and county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Leather- Polishing Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had tothe accompanying drawing and to the letters of reference marked thereon.

My invention consists in attaching the agate or other substance used in a leather polishing machine, to a vibrating arm which is so controlled by an eccentric operated by and moving simultaneously with the crank shaft through which the vibrating motionv is imparted to the said arm, that the agate may be depressed to the bed of the machine during the inward movement of the arm and raised from the bed during its outward movement as fully described hereafter, thereby dispensing with the jointed arm which is commonly used in leather polishing machines, and which owing to its liability to get out of order, is very uncertain in its action.

In order to enable others skilled in the art, to make and use my invention, I will now proceed to describe its construction and operation.

On reference to the accompanying drawing which forms a part of this specification, Figure I, is a vertical section of a leather polishing machine, with my improvement. Fig. 2, the same with the working parts in a different position, and Fig. 3, a plan view.

Similar letters refer to similar parts throughout the several views.

A and A are the two frames of the machine each having two projecting arms a, ZJ, secured to a suitable foundation plate w.

In the upper end of the projections a a of the two frames, turns a shaft B, to which is secured a cog wheel C gearing into a similar wheel D, which turns on a pin projecting from one of the frames, and which gears into a third wheel E of similar size, on the driving shaft G, which turns at one end in one of the frames, and at the other end in a standard Y on the base fw. To this sha ft G is secured the crank wheel H having near its edge a pin for receiving one end of the connecting rod I, the opposite end of which is jointed at z' z' to the vibrating arm J. An eye on the upper end of this arm embraces the eccentric K on the shaft B and the lower end of the arm is provided with a sliding bar L fitted to guides m m, in which it may slide to an extent limitedby a. spring of proper rigidity, the usual polishing agate being attached to the lower end of this bar.

rIhe projections .7) of the two frames support the bed M on which the leather to be polished is placed, the curve of the bed forming part of a circle, or approximating to a part of a circle of which the center of the shaft B is the center.

It will be observed that as the shaft is caused to revolve a vibrating motion will be imparted to the arm J on the eccentric K and that simultaneously with this movement an upward and downward movementwill be imparted to the arm by means of the eccentric K. As the latter revolves at the same speed as the crank wheel H, it will be evident that the eccentric may be so adjusted that during the inward movement of the vibrating arm the agate on the bar L shall be in close contact with the bed M of the machine, and that during the outward movement of the arm the agate shall be elevated free from the bed to an extent which depends upon the amount of the eccentricity of the eccentric.

As seen in Fig. l, for instance, the arm has been depressed by the turning of the eccentric, until the agate is in Contact with the outer end of the bed, the arm when in this position having commenced its inward vibration. As the arm makes the latter movement the eccentric will continue to turn downward and maintain the agate in contact with the beduntil it reaches nearly t0 the end of the same. By this time the pin of the crank wheel, as it turns in the direction of the arrow, has reached the position shown in Fig. the eccentric has been turned up so as to elevate the arm I and raise its agate from the bed in which position it is maintained during the outward vibration of the arm. When the latter has reached the limit of its out "ard movement however, the eccentric will have been turned down to an extent sufficient to depress the arm preparatory to a repetition of its inward movement with the agate in contact with the bed. As the arm moves inward the eccentric turns in the direction of this movement and consequently the agate will traverse over the bed in a curve closely approximating to the part of a circle of which the shaft B is the center. When the arm has reached the limit of its inward movement, and commenced its forward movement, the eccentric continuing to move in the same direction, which is contrary to that of the arm, the agate will be suddenly raised from the bed thereby aording ample time for the attendant to alter the position of the leather.

The above described mode of lifting and depressing the vibrating arm with its agate will obviate the necessity of using the knee jointed arm which is generally adopted in leather polishing machines, and which, owing to its liability to get out of order, is very uncertain in its action.

I claim as my invention and desire to secure by'Letters Patent.

R. A. STRATTON.

Witnesses: Y

HENRY I-IoWsoN, CHARLES D. FREEMAN.

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