US340713A - Leather-dressing machine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. J. T. FREEMAN.

LEATHER DRESSING MACHINE.

No. 340.713. Patented Apr. 27, 1886.

2 Sheets-Sheet 2v (No Model.)

J. T. FREEMAN V LEATHER DRESSING MACHINE.

Patented Apr. '27, 1886.

N. PETERS, mnm-mho nwur. Wmhingtm D. c.

UNITED STATES PATENT O FICE.

JAMES T. FREEMAN, OF WOBURN, MASSACHUSETTS.

LEATHER-DRESSING MACHINE.

SPECIFICATION forming part of Letters Patent No. 340.713, dated April 27, 1886.

Application filed April 30, 1885. Renewed March 11, 1886. Serial No. 194,874. (No model.)

To all whom it may concern:

Be it known that I, JAMES T. FREEMAN, of Woburn, county of Middlesex, and State of Massachusetts, have invented certain newand useful Improvements in Glassing-Jacks, of which the following is a specification, taken in connection with the drawings accompanying and forming apart hereof,in which- Figure l is a side elevation. Fig. 2is a plan View. Figs. 3 and 4 are front and rear elevations, respectively. Fig. 5 is a section on line a: 00, Fig. 1. Fig. 6 is a vertical section lengthwise of the table and its supports. Fig. 7 is a top view of Fig. 6, with the table removed. Fig. 8 is a top view of the table with the bolster broken away at one end to show the bolster-clamp and its adj usting-screw. Fig. 9 is a section on line 3 3 Fig. 8.

My invention relates to machines for glass ing leather; and it consists in the peculiarities, hereinafter more fully described, relatiug,chiefly,to the mechanism for operating the tool and the stock-table and its supports.

The invention will be readily understood by those skilled in the art from the following description of a machine embodying it.

The frame of the machine shown and below described is also of peculiar construction and forms the subject-matter of a separate patent of even date herewith.

In the drawings like letters of reference are applied to like parts.

The machine is supported by a frame, A, preferably of cast-iron, which is provided with a brace, B, of the curved shape shown, in Fig. 1, and extending centrally from the forward end of the upper projection of the frame which supports thesliding head a backward and downward to the rear part of the base of the frame. This brace has a set-off, (shown at b, Fig. 2,) to accommodate the balance-wheel O, and at this point the piece d, corresponding to the set-off in the brace, is bolted thereto on the other side of the wheel, and serves to protect the wheel and strengthen the brace. A corresponding set-off in the central upright portion of the frame (shown at c, Fig. 2) is made also to accommodate the balance-wheel and its connecting-rod f. A plate, 9, Fig. 1, corresponding to this set-off, is bolted, as shown, to this part of the frame, and also serves as a protection to the balance-wheel and connectingrod and to strengthen the frame. By this construction I obtain a braced frame of sufficient strength and rigidity to insure the uniform operation of the tool and itsconstant and even pressure on the stock.

A secondary frame, D, Figs. 2, 3, and l, secured at one side of the main frame A, serves to support the drivingshaft h, provided with the fast and loose pulleys i i, and to which is secured the balance-wheel C, so set that its connecting-rod f, which operates the glassingtool, lies centrally in the machine. (See Fig. 2.) This connecting-rod is straight, and is composed of two parallel strips secured to blocks placed between them at either end and at one or two intermediate points, thus leaving a space between the strips which accommodates the set-screw j and surrounding parts as the rod rises, and prevents them from obstructing the movement of the rod. The forward end of this connecting-rod is pivoted to the tool-carrying mechanism 70, which is supported by the sliding head a, which slides on the rods m in the well-known manner. These rods m are secured at either end in the end pieces, a, fast in a projection of the frame.

In order to prevent the upper guide-rod from springing, and thus rendering the pressure of the tool upon the stock uncertain, I provide a block, 1), made with a concave face to fit the round of the rod and set in a recess cut in the frame. This block is connected through a hole in the frame with a set-screw, q, projecting above the frame, and by means of which the block 1) may be set down on the rod m, thus forming a backing for the rod and preventing any upward spring thereof.

As is well known to those skilled in the art, the leather to be glassed is laid on the table 1', and the glass or tool which operates upon the surface of the leather begins to bear upon it at the upper end of the table, and continues to bear upon it throughout its downward movement. It then rises and is moved forward above the leather until it reaches the top of the table again, when the downward stroke is repeated.

- Fig. 1 shows the position of the machine just after the tool has commenced its downward stroke.

' threaded and set in the frame A.

to pressure exerted from above.

It will be obvious that the movement of the glass relatively to the stock must be Very accurate, and the pressure of the tool uniform, and at the same time the machine must be adapted to be run at a high rate of speed. It becomes important, therefore, as the stock varies in thickness and density, that the table which supports it should be capable not only OI positive adjustment relatively to the tool, but that it also be so mounted as to adjust itself automatically to the inequalities of the stock while the machine is in operation. In order to accomplish these ends I mount the table on a part of the frame A, which projects beneath the glassing-tool, and in the following manner: A plate, 0, is supported at either end upon pins t, the lower ends of which are (See Figs. 1 and 6.) Between the plate 0 and the frame are set the spiral springs s, the upper ends of which bear against the plate 0, while the lower ends bear against shoulders on the pins 2. These springs s are compressed and tend to raise the plate 0. At either end of the plates are secured the pins a, two at the forward end of the plate and one at the rear end, (see Fig. 3,) which project through holes in the frame A, and the lower ends of which are provided with check nuts 92. By setting up these check-nuts the plate 0 may be pulled downagainst the resistance of the springs s. and may consequently be made to yield easily or stiffly From the upper side of the plate 0 rise the projections 12, which bear in depressions made on the under side of the table 1'. Between the table 1 and the plate 0 is placed the adj usting-plate w, which is slotted at either end to accommodate the projections 12 and permit of sliding this plate '10 on plate 0. Plate w is provided at either end with blocks a, secured thereto, which have inclined faces, (see Fig. 6,) which bear against corresponding inclined faces, a", at either end of table r. The weight of table r is borne on these inclines, the projections "v acting chiefly to prevent lateral movement of the table. The adjusting-plate w is turned downward at the forward end and is provided in the down-turn with an adjusting -serew, b, which bears against a projection, c, from the under side of plate 0. By turning the set-screw the plate 10 is moved forward, the inclined faces a acting to raise the table 1', thus rendering a delicate adjustment of the table perpendicularly possible, and at the same time rendering it certain that the table will be raised'equally throughout its surface, thus maintaining its parallelism to the line of rub of the glassing-tool.

The table 1, I prefer to make of metal,and I cover it with a bolster, d, of leather or other suitable material. This bolster is secured by screws (shown at 6, Figs. 1 and 6) to the front end of the table, and is provided at the rear end with a clamp, f, screwed to it, and which is provided with projections g, beveled, as shown in Fig. 9, to slide in a corresponding dovetailed groove out on the under side of the table 1. This clamp is also provided with an adjusting-screw, h, which bears in the end of and well known, and I do not claim these features broadly.

What I claim isl. A glassing-jack frame havinga tool-supporting arm projecting forward abovethe table, combined with an upwardly-curved brace eX- tending from the forward end of said arm to the rear portion of the base of the frame, in combination with a glassing-tool and its operating mechanism, the slide rod m, and its adjustable block 10, for the purposes and substantially as described.

2. The combination, with the glassing-tool and its operating-mechanism, of the upper slide-rod, m, and its-adjustable block p, set in the frame, for the purposes and substantially as described.

3. The combination, with the glassing mechanism of a glassingjack, of the table 9 and its bolster (1, provided with an adj usting-clamp, whereby the bolster may be tightened as desired, substantially as shown and described.

4. The combination, with the glassing mechanism of a glassing-jack, of the table 0', provided at either end with the inclined faces a and held in position laterally by the projections 12, and the plate to and its adjustingscrew, said plate to having corresponding inclines a, whereby the table 1" may be raised or lowered, substantially as described.

. JAMES T. FREEMAN.

Witnesses:

WM. A. MAoLEoD, ROBERT W'ALLAon.

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