US56641A - Improvement in sewing-machines - Google Patents

Description

2 Sheets-Sheet 1.

1. c. TUCKER.

Sewing Machine.

No. 56,641. Patented luly 24, 186%.

WITNESSES.

@wm. mm. C r fl M (HEW.

- 2 Sheets-Sheet 2.

J. C. TUCKER.

Sewing Machine.

Patented July 24, 1866.

v UNITED STATES PATENT Curios,

JOSEPH TUCKER, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 56,641, dated July 24, 1866.

To all whom it may concern.-

Be it known that I, JOSEPH O. TUCKER, of the city and county of San Francisco, State of California, have invented a new and useful Improvement in SewingMachines; and I'do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference bein g had to the annexed drawings, making part of this specification, in whichlike figures designate like parts.

Figure 1 of the drawings represents a perspective view of a sewing-machine with my improvements attached. Fig. 2 is a perspective view of the back side of the arm which carries the usual presser, with the adjustable presser attached. Fig. 3 is an end view of the working part of the machine under the table, showing the position of the loopers; and Fig. 4 is a plan of the arm which operates the usual looper, with the part attached for operating an additional looper.

I have shown my improvements as attached to a Grover & Baker machine; but it is evident that it may be applied to any machine of the same general construction.

The object of my invention is to adapt the Grover 81; Baker machine for quilting or sewing two or more parallel seams at the same time; and it consists in providing that machine with one or more lower thread-carrying devices, presser-feet, and needlecarriers, each supported in suitable bearings, and capable of adjustment in relation to each other by suitable racks and pinions, so as to vary the distance of one line of stitching from the other.

A is the usual working-arm, which carries the needle, and is operated by a pin, B, on a disk, C, attached to the main driving-shaft, working in an elongated slot, D, in the end of the arm. To the under side of the table F a hanger, G, is secured by screws. The hanger is slotted at g, into which slot projections I I from a vertical hanging frame, G enter. This frame G supports in suitable bearings G which project from it on the rear side, a shaft, G which is provided at its upper end with a looper, such as is ordinarily used in a Grover & Baker machine. To the rocking arm under the table a slotted fI'2I/DJG,.G, is attached with suitable screws. The shaft of the looper is provided with a spiral groove, as is the regular looper E of the machine. The looper-shaft Gr enters the slot in the frame G, and is rotated by the rising and falling of said frame in the same manner that the ordinary looper E is rotated by the rising and falling of the end of the rocking arm. To the hanger G is attached a rack, H, the free end of which is supported by a bearing, H. In this same bearing is supported a short rod or shaft, J, having secured to it between the top of the bearing H and the under side of the hanger G a small pinion, I. This pinion engages with the rack H. The end of the shaft J is provided with a thumb-nut, K, by which the said shaft may be turned in order to adjust the position of the looper-shaft G nearer to or farther from the usual looper E. When the looper is adjusted it is secured in the desired position on the hanger G by the nut Q. Each looper is provided with a thread, and their supplyingspools may be situated in any suitable position and have applied to them necessary tension' devices. The part G is represented in Fig. 4.

To the ordinary feedin g device, having the usual four motions, is secured at right angles thereto a long bar, 1", (shown in red in Fig.1,) provided with a roughened feeding-surface. This bar should be of sufficient length to effectually move the material over the table. The upper portion of the table is removed for this bar to rise up through and seize the material being sewed. On the rocking needlecarrying arm A, above the table, is a projecting rib, M, on which is arranged to slide an extra slotted needle-carrying arm, N, in the lower end of which may be secured by a screw, it, a pertbratingneedle, which needle will pass through the material and interlock its thread with that of the extra looper on the shaft G Projecting from the slotted arm N is a rack, O, the outer end of which is supported by a bracket, 0. In the bracket a shaft, P, rests and turns, having secured to it between the bracket and the side of the arm A, and over the rack O, a pinion, P, which engages with the rack O. This shaft has a thumb-nut, P, by which it may be turned, and consequently the arm N can be adjusted nearer to or far ther from the usual needle-carrier in the end of the arm A; and passing through the slot R of the arm N is a screw, T, by which the latter arm may be secured in position when properly adjusted.

A presser-foot, S, and its bearing S for the same are attached to the rigid arm which carries the regular presser and its slide. This arm is slotted, as shown at Fig. 2, to receive a pin projecting from the back of the presserbearing S, and to the presser-beariug is attached a rack, U, which engages with a pinion, V, on the shaft W, and is moved thereby in the same manner as the needle-arm N and hanger G Each upper needle is provided with a thread, the spools for supplying which may be situated in any suitable place. I have shown them, however, as being supported in a standard, X at the rear of the machine, and the threads passing from these spools may be provided with any suitable tension devices.

I do not limit myself to any specific number of needles and loopers, nor to the precise manner of adjusting them, but desire to use as many as I may deem convenient and adjustable in any equivalent manner, each needle, however, being so arranged that it will operate with its particular looper.

I have not attempted to describe the wellknown parts of the machine, as they are well known to any person conversant with sewingmachines, but have described with sufficient particularity my improvements.

What I claim, and desire to secure by Letters Patent, is

1. The combination of a rocking perforating needle-carrying arm with one or more adjustable perforating needle-carrying arms, substantially as described.

2. The combination of a lower thread-carrying looper, working in fixed bearings, with one or more loopers the bearings of which are capable of being adjusted, substantially as and for the purpose set forth.

3. The combination, with the rocking arm of a sewing-machine provided with a perforating-needle, of one or more adjustable needlecarrying arms above the table, and a looper working in fixed bearings below the table, and one or moreloopers in adjustable bearings, for making parallel lines of stitching, substantially as described.

4. In combination with the rocking arm of a sewing-machine, carrying a perforating-needle and provided with one or more adjustable needle-carrying arms, a stationary arm provided with one presser held in fixed bearings and one or more in adjustable bearings, substantially as described.

This specification signed and witnessed on this 11th day of June, A. D. 1866, in New York city.

J. O. TUCKER.

Witnesses:

J OHN T. CORNELL, GEO. H. HARRISON.

Images