US801152A - Stopping device for sewing-machines. - Google Patents

Description

PATENTED 0013. s

J. L. E. NELSON.

G DEVICE FOR SEWING MACHINES.

STOPPIN APPLICATION FILED MAY 5. 1905.

JULIA L. E. NELSON, OF GENOA, NEBRASKA.

STOPPING DEVICE FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Oct. 3, 1905.

Application filed May 5, 1905. Serial No. 259,000.

To (1/7] whom, it imty concern:

' noa, in the county of Nance and State of Nebraska, have invented certain new and useful Improvements in Stopping Devices for Sewing-Machines, of which the following is a specification.

This invention consists of a novel device designed for use upon sewing machines for stopping the machine with the needle withdrawn from the work. No small amount of inconvenience is often incurred in operating a sewing-machine on account of the fact that ordinarily it is necessary to stop the machine by gradually slowing down upon the treadleaction, and when stopped the needle is often in the cloth, making it necessary for the operator to remove one of his hands from the goods to move the fly-wheel of the needle-bar shaft forwardly or backwardly to raise the needle from the goods and permit the thread to be cut or broken. The machine may also be stopped by grasping the fly-wheel, as is often done; but the above operations are often disadvantageous for obvious reasons.

A stopping mechanism such as embodied in this invention consists mainly of a manuallyoperated pressure device so arranged as to be readily actuated by the knee of the operator of the machine, so as to be caused to cooperate with the fly-wheel of the needle-shaft to stop this wheel at a predetermined point in its revolution, which point is such that the needle will be elevated or raised from the goods.

Simplicity of construction is a feature of the device above mentioned.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and accompanying drawings, in which Figure 1 is a front elevation of a sewingmachine, showing the invention applied thereto. Fig. 2 is a perspective view, parts broken away, showing a portion of the fly-Wheel of the needle-shaft, bringing out clearly the formation of the notch therein and also the form of the pressure-lever cooperating with said wheel. Fig. 3 is a vertical section of the uppermost section of the pressure-lever, showing clearly the telescoping parts composing the same.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

In carrying out this invention an ordinary type of sewing-machine A is illustrated, this machine embodyinganeedle-bar operated by means of a horizontal shaft upon which the fly or hand wheel 1 is mounted. The shaft carrying the wheel 1 is actuated by a belt connection 2 with a crank-wheel 3, connected by a pitman A with the treadle 5, a conventional construction embodied in many machines at present in use. The machine parts above described in the practical adaptation of the invention are unchanged, with the exception of the wheel 1, the latter being provided in its peripheral portion with a notch or recess 6. The notch or recess 6 is adapted to receive the head 7 at the upper extremity of the pressure-lever 8, the latter being so disposed as to be readily operated by means of knee-pressure upon the part of the one who is using the machine. The lever 8 is preferably made in three pivotally-connected sections, (indicated at 8*, 8 and 8,) the section 8 comprising telescoping parts 8 and 8 the part 8 carrying the head 7, before described. The pivots connecting the sections 8, 8 and 8 are indicated at 9, and the pivotally-connected portions of these sections are enlarged and provided with a plurality of openings 11, arranged on the arc of a circle struck from the pivot 9 as a center, set-screws 10 being carried near the upper ends of the sections 8 and 8 to engage in a selected one of the openings 11 to hold the sections of the lever in adjusted positions. The adjustability of the sections 8 and 8 with respect to the section 8 admits of positioning the lever so as to be convenient for operation by the knee of the person using the machine, the sections 8* and 8 being adapted for lateral adjustment in a manner which will be readily apparent. Trunnions 12 project from the part 8 of the section 8 of the lever and are mounted in suitable bearings formed in plates 13, secured to the under side of the top of the stand or table of the machine'A. The lever is thus pivotally connected with the machine in such a manner that when the lower section 8 is forced laterally the head 7 is caused to move toward the outer side of the wheel 1 for engagement therewith. Aspring 14:, however, is connected with the section 8 of the lever and with the stand of the machine A, so that the head 7 is normally held out of contact With the Wheel 1. The head 7 of the lever, Which'directly enmin-A! gages the wheel 1, may be made of friction the combination of a wheel, and a pressure-lematerial or the like, so as to quickly stop the wheel in its revolution, yet without shock to the parts. The head '7 will engage in the notch 6 of the wheel 1 when the latter stops, and as this notch is so located that when engaged by the head 7 the needle-bar of the machine is elevated it will be seen that the needle is withdrawn from the cloth or work to permit breaking or cutting of the thread in a manner which will be obvious. The trunnions' 12 are preferably integrally formed with the part 8 of the section 8 of the lever, this part 8 being of tubular form at its upper end, as shown at 15, so as to receive the lower end of the part 8 the latter telescoping therein. The part 8 of the section 8" is prevented from displacement from the part 8 by means of a small catch 16, the latter being arranged convenient for disengagement from the part 8 Whenever it is desired to remove the latter from the part 8. The catch 16 engages in a recess 17 in the part 8 and the connection of the parts 8 and 8 is such that the device may be applied to a drop-head machine because of the removability of the member 8 from the member 8.

In the practical operation of the invention it will be seen that as the machine is in operation the head 7 01' the lever 8 is held away from the Wheel 1 by the spring let. To stop the machine, the operator forces his knee against the lower section 8" of the lever 8, whereupon the head 7 is caused to engage the wheel 1 and entering the notch 6 stops this Wheel, so that the needle-bar is lifted, as before described. A greater or less pressure may of course be exerted upon the lever 8 as necessary in the actual use of the stopping device.

Having thus described the invention, what is claimed as new isl. Inastoppingdevice forsewing-machines,

ver arranged to coaet with said wheel to stop the same at a predetermined point in its revolution, said pressure-lever embodying a plurality of adjustable sections.

2. In astoppingdevice for sewing-machines, the combination of a support, a wheel, a pressure-lever arranged to coact with said wheel to stop the same at a predetermined point in its revolution, said pressure-lever embodying a plurality of adjustable sections, and a pivotal connection between one of the sections of the lever and the support.

3. Inastopping device forsewing-machines, the combination of a support, a wheel, and a pressure-lever arranged to coact with said wheel tostop the same at a predetermined point in its revolution, said pressure-lever em bodying a plurality of adjustable sections, the uppermost of said sections having pivotal connection with the support, the lowermost of said sections being arrangedconvenient for operation by the knee.

4:. In a stopping device for sewingmachines, the combination of a wheel, a pressure-lever coacting therewith to stop the same, and a member detachably supported by the pressure-lever and provided with a head to engage the wheel.

5. In a stopping device for sewing-machines, the combination of a wheel, a pressure-lever coacting therewith to stop the same, a member detachably supported by the pressure-lever and provided with a head to engage the wheel, and a catch arranged to engage the detachable member aforesaid to hold the same in position.

In testimony whereof I aiiix my signature in presence of two witnesses.

JULIA L. E. NELSON. [L. s]

Witnesses:

H. O. BRATT, 13. 1). FoXMAN.

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