US709311A - Feeding mechanism for sewing-machines. - Google Patents

Description

Patented Sept. [6, I902. .1. v. EYES. FEEDING MECHANISM 'FOR'SEWING MACHINES.

(Application med-r615; '7, 1002.

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(No Model.)

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FEEDING MECHANISM FOR SEWING MACHINES.

(Application filed Feb. '2', 1902.) (No Model.)

Patented Sept. l6, I902. r

2 Sheets-Sheet 2.

UNITED STATES ATENT @FEICE.

" JosHUA VALENTINE EvEs, OF BELFAST, IRELAND.

FEEDING MECHANISM FOR SEWING-MACHINES.

SFEGIFIGATION forming part of Letters Patent N 0. 709,311, dated September 16, 1902.

duplication filed February 7, 1902. Serial No. 93,096. (No model.)

T0 at whom it may concern.-

Be it known that I, JOSHUA VALENTINE EVES, a British subject, and a resident of Belfast, in the county of Antrim, Ireland, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification.

This invention relates to feeding mechanism for sewing-machines; and the objects and advantages of the same will be set forth in the following description, while the novelty thereof will form the basis of the claims succeeding such description, and said invention is clearly illustrated in the accompanying drawings, forming a part of this specification, and in which- Figure 1 is an elevation of machine, partly in section, showing circular feed with circular top pressers for scalloped work and mechanism below the table to actuate the feed, comprising a differential motion to stop the feed when the needle is in the cloth. Fig. 2 is a section of Fig. 1 on line y y. Fig. 3 is a plan of Fig. 1 with part of machine-bed removed. Fig. tis asectional elevation on line a 2, Fig. 1, showing the differential motion and cam. Fig. 4 is an enlarged side elevation of differential-motion sewing mechanism, whereby the feed-bar is held stationary while the needle is in the goods. Fig. 49 is a side elevation,partly in section,of Fig.4. Fig. 5 is a plan of top pressers, being part plan of Fig. 2. Fig. 6 is a sectional elevation of top pressers. Fig. 7 is an enlarged sectional elevation of top presser and disk upon which it rests.

The frameA and the needle-bar B are of ordinary construction, and the machine is operated in the usual way by mechanism not shown in the drawings. To give a circular or curved feed to the work under operation for scalloped or semicircular edges, the feed motion is arranged or constructed with a pair of circular rotary pressers H H, mounted to engage with a corresponding pair of revolving feed-disks K K, sunk into the feed-plate K The cloth may be held down by either the presser H or the presser H, the one not in use being lifted byafinger-lever h h, pivoted to the frame or bracket 71 The presser is held down by a spring 71. (see Fig. 6,) and the finger-lever h h engages a disk or collar able way, preferably cross-cut to form diamond points. The pressers may be made with or without some friction facing, such as leather, rubber, or paper. The disks K K are each made with a stud 7r projecting through. the feed-plate K each stud being provided with a wheel 10 These wheels and disks are driven by the train of gearing to be now described.

A worm L is fixed to a convenient shaft Z and drives the worm-wheel L. Fixed to the worm-Wheel L and revolving on the same stud is the bevel-wheel Z, gearing into the bevel-wheel Z Fixed to the same stud as the bevel-wheel Z at its other end is the change spur-wheel Z gearing with the spurwheel 1. The rate of feed can be changed by altering the change-Wheel Z the gear being adjusted by moving the bracket M around the shaft land fixing it by means of the bolt m in the circular slot m.

The wheel Z rides loose on the shaft m along with a bevel-wheel m to which it is affixed. The wheel m is fixed to the shaft m and is driven from m by a carrier-bevel m. The bevels m m and m are equal wheels and are for a purpose to be presently described. The shaft m is made with a worm m", which gears with a worm-wheel n. This worm-wheel n is fixed to the lower end of a small upright shaft N, to the upper end of which is fixed the wheel 10., driving the small wheel 70 and the disk K. The disk K is also driven by the wheel 12 through the carrierwheels 72 and "a The mechanism described would give a continuous motion to the feed-disks K K. It is needful, however, to make the feed intermittent, so that the disks are stationary when the needle is in the cloth. This is achieved by interposing the bevel wheels already mentioned, m m m, and imparting to the carrier m an oscillating motion around the axis of the other two Wheels at the rate of one complete oscillation for each stitch of the machine. To effect this, the carrier m is mounted in a frame m, pivoted on the shaft m This frame m is made with a jaw m engaging a cam or eccentric m fixed to the shaft Z, the shaft Z making one revolution for each stitch. The cam or eccentric m is made of such a throw that the feeding is arrested during the time the needle is in the cloth and accelerated during the time it is lifted. Theoretically the eccentric m should be two cams placed side by side, one to work against the upper part of the jaw m and one against the lower part, the upper and lower parts of the jaw being set in different planes. Practically it is preferred to use an eccentric, especially as the error so created is infinitesimal.

Fig. 5 shows a plan of the two top pressers H H and the arrangement for moving one or both away from the needle-bar for any purpose. The bracket hicarrying the presser,is pivoted on the center h", and is secured bya Wing-nut h in a circular slot h By slacking the w ing-nut the bracket k and presser H can be turned back to the end of the slot k The presser is set in position again by bringing the wing-bolt against the front end of the slot 1L8.

Having described the invention, what I claim is 1. In a feeding mechanism for sewing-machines, the combination with a traversing needle-bar and means for operating and controlling it, of a circular rotary presser and a spindle to support it, a rotary disk upon which the presser rests and means for rotating them comprising a driving-shaft Z and worrn L thereon, a worm-wheel L gearing with the worm, a bevel-wheel Z attached to the wormwheel, a bevelwheel 1 gearing therewith and rotating with it, a spur-wheel l rotating with the bevel-wheel a loose spur-wheel Z driven by the spur-wheel Z a bevel-wheel m attached to and rotating with the loose spur-wheel Z, a bevel-wheel m affixed to the shaft m driven from the bevelwheel m by a carrier-wheel m a shaft m carrying the bevel-wheel m on one end and a worm m on the other end, a frame m pivoted on the shaft m to carry the carrierwheel m around the bevels m and m when the needle is embedded in the work, the cam m actuating the frame m the worm-wheel n engaging with the worm m the upright shaft N to which the worm-wheel m is fixed. the pinion n on the upper end of the shaft N and the pinion k on the spindle In of the rotary feed-disk K.

2. In a feeding mechanism for sewing-machines, the combination with a traversing needle-bar and means for operating and controlling it, of a circular rotary presser and a spindle to support it, a rotary disk upon which the presser rests and means for rotating them comprising a driving-shaft l and worm L thereon, a worm-wheel L gearing with the worm, a bevel-wheel 1 attached to the worm-wheel, a bevel-wheel Z gearing therewith androtating with it, a spur-wheel Z rotating with the bevel-wheel Z a loose spur-wheel Z driven by the spur-wheel Z a bevel-wheel m attached to and rotating with the loose spur-wheel l, a bevel-wheel m affixed to the shaft m driven from the bevelwheel m by a carrier-wheel m a shaft m carrying the bevel-wheel m on one end and a worm m on the other end, a frame m pivoted on the shaft m to carry the carrierbevel m around the bevels m and 0% when the needle is embeddedin the work, the cam m actuating the frame m, the worm-wheel n engaging with the worm m the upright shaft N to which the worm-wheel m is fixed, the pinion 'n' on the upper end of the shaft N and the pinion k on the spindle is of the rotary feed-disk K, and the train of gearing 11 n and k to drive a second rotary disk K.

In Witness whereof I have hereunto signed my name, in the presence of two subscribing witnesses, this 24th day of January, 1902.

JOSHUA VALENTINE EVES.

Witnesses: PETER SHAW, GEORGE TWEED.

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