US137837A - Improvement in carving-machines - Google Patents

Description

H. GRUBENBEGHER.

Carving Machines.

Patentd April 15,, 1873..

AM. PHOTO-UTHOGRAIHIC 00. m4 (osamns moms) UNITED STATES PATENT OFFICE.

HENRY GRUBE'NBEOHER, OF NEW YORK, N. Y.

IMPROVEMENT IN CARVlNG-MACHINES.

Specification forming part of Letters Patent No. 137,837, dated April 15, 1873; application filed October 26, 1872.

To all whom it may concern:

Be it known that I, HENRY GRUBENBEGH- ER, of the city, county, and State of New York, have invented an Improvement in OarvingMachines, of which the following is a specification:

Figure 1 represents a side elevation of my improved carving-machine. Fig. 2 is a top view of the same. Fig. 3 is a detail vertical section on the line 0 c, Fig. 2; Fig. 4, a top View of the frame for holding pattern and block in position for turning; and Fig. 5 a transverse section on the line 70 70, Fig. 4:.

Similar letters of reference indicate corresponding parts.

The invention consists in the improvement of carving-machines, as hereinafter described and pointed out in the claim.

In the accompanying drawing, the letter A represents the supporting frame or table. The same furnishes bearings e for the spindle B of the cutting-tool a, and bearings f for the gage-pin b, and also a support, d, for the sliding carriage G, to which the jointed block and pattern-holding frame D are attached. The spindle B is revolved, by belt or other connection, with a suitable driving-shaft, I. The tool a can be applied to and removed from the spindle, sothat it may be replaced when desired. The gage-pin b is fastened in the support f, which is laterally adjustable on the table A by having its shank enter a sort of sleeve, 9, that is fixed to the table, or by slotting the shank and connecting it by a screw to the table, or by slotting the table, or otherwise. By this adjustability of the support f the pin 1) can be set at any suitable distance from the tool or, according to the dimensions of the articles to be cut. The pin 1) can also be longitudinally adjusted in the support f, so that its point can be set and held exactly in line with the point of the tool. The slide 0 is by preference dovetailed in the support d, so that it can move back and forth, but not sidewise, nor up and. down. To its front end is secured a cross-arm, h, which has projecting cars at the ends, wherein the ends of a rockshaft, 'i, are pivoted, as shown in Fig. 2. Rods j j, which are pivoted to the shaft i, connect the same with a parallel bar, I, and constitute together therewith the joint ed frame D, which is a changeable parallelo- The block E to be carved, and the pattern F to be imitated, are fastened to the faceof a plate, G, which has ears m m at its ends, which are pivoted to the ends of the bar I. The plate G can, on its points n a, be swung to hold the block and pattern at any suitable angle to the tool and gage-pin, and can, by a set-screw, 0, or otherwise, be locked at any desired angle to the bar Z. The whole frame can moreover be vibrated on the pivots p p of the rock-shaft i, so that the block and pattern can be swung on two different curves, both indicated by dotted lines in Fig. 1. A spring or weight, r, connects with the slide D, and tends to draw it back, away from the tool a and pin 1). Another spring or weight, 8, serves to balance the frame D, and to hold it nearly horizontal.

The operator, after the block and pattern have been properly secured to the plate G, and the tool a and pin 12 being adjusted, has only to vibrate the plate G up and down, and draw it back and forth, and swing it sidewise on the pivots of the rod j, so as to bring every part of the pattern in contact with the pin 1), which will cause the tool .to reach corresponding depths and parts of the block, and to reproduce the pattern. When work is to be cut on more than one side-i. 6., when it becomes necessary to turn the pattern, in order to bring all parts of its surface in contact with the pin b-I employ the holder which is represented in Figs.4 and 5, and in which laterally adjustable brackets t, a, and 'u, are fastened to the face of the plate G. These brackets contain center-pins w to, all in line with each other. The block to be cut is centered between the brackets t and a, and the pattern between the brackets to and o. The center pin in the middle bracket to has flattened ends and is swiveled in a, so that when the pattern is turned the block will also be turned in the same manner and degree by Virtue of such swivel-connection.

Having thus described my invention, Iclaim as new and desire to secure by Letters Patent-= l. The plate G that holds the block and pattern combined with. a jointed frame, I),

balanced in a horizontal position by weights with the brackets ta 2:, having centering-pins,

or springs, as and for the purpose described. w, of which the middle one is swiveled, as

2. The combination with plate Gr, supportand for the purpose specified.

ing both block and pattern, of the tool a and HENRY GRUBENBECHER. pin 11, operating therewith, as and for the pur- Witnesses: v pose set forth. (J. SEDGWICK,

3. A block and pattern-plate, G, provided T. B. MOSHER.

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