US299368A - hsher - Google Patents

Description

. 3 Sheets-Sheet l. (Nomodel') A. A. FISHER an A. HART.

SEWING MACHINE. No. 299,368. Patented May 27, 1884.

(No Model.) 3 Sheets-Sheet 2.

A. A. FSHER 8v A. HART.

SEWING MACHINE. 180.299,888. Patented May 27, 1884.

3 SheetsV--Sheet 3.

(No Model.)

A. A. FISI-IER 8v A. HART.

SEWING MACHINE.

N0.299,368. Patented May 27, 1884.

Darren @trarne arena ALFRED A. FISHER AND ALBERT HART, OF SAN FRANCISCO, CALIFORNIA,

or sAME PLAGE.

SEWING-MACHINE SPECIFICATION forming part of Letters Patent No. 299,368, dated May 27, 1884:.

Application filed June 26, 1883. (No model.)

T all whom 25 may con/cern,.-

Be it known` that we, ALFRED A. FrsHER and ALBERT HART, of the city and county of San Francisco, a-nd State of California, have invented an Improvement in Sewing-Machines, and we hereby declare the following to be afull, clear, and exact description thereof.

Our invention relates to certain new and useful improvements in sewing-machines, and

1o these consistin means operated by the thread of the machine for throwing the power device out of gear with the sewing-machine upon the breaking of the thread, as we shall hereinafter fully explain, reference being made to the accompanying drawings, in which- Figure l, Sheet l, is a perspective View of our improvements. Fig. 2, Sheet 2, iscrosssection through the weight WV and slotted standard C. Fig. 3 is a plan of lever D and a 2o section through the standard C, showing the slotted guide j and showing bolt J. Fig. 4 is a modification showing the means by which the machine is stopped by the attempted passage of a knot. Fig. 5, Sheet 3, showsa power device which is thrown in or out of gear by the lever D.

A is a table upon which the sewi 11g-machine B is secured.

C is a standard secured to the side of table 3o A, and extending downwardly.

.D is a lever connected by means ofthe wire d with any suitable devices below, which, by the movement up or down of said lever D, will be thrown into or out of gear with the sewing-1nachine. InFig.wehaveillustrated a device of this character inorder to show more perfectly the effect of our invention upon the lever D and sewing-machine.

Z is the driving-shaft, carrying a large friction-wheel, z.

` Y is a stand, in which are mounted to oscillate the small bearing-blocks y, in which is journaled the shaft X. This shaft carries a small friction-wheel, a', and a pulley, T, from which abelt, t, extends to the driving-wheel of the sewingdnachine. A lever, fu, is attached to one of the rocking bearingblocks y,

and to the end of this lever the wire d from lever D is secured. A spring, a, is attached to the lever fv and to the stand Y, and operates to draw down upon said lever, thus rocking the bearing-blocks y and holding the friction-` wheel .x away from the frictioirwheel z, in which case motion is not transmitted to the sewing-machine. can only take place when the wire d is slackened by the lowering of lever D above; but when said lever is raised the wire d draws up the lever i), rocks the bearings y, and forces the small friction-wheel against the large one, and thus transmits motion to the sewing-machine. Ve claim nothing forthismechanism, as it is well known 5 but we have described it, as before stated, to show more clearly the operation oi` our invention.

Pivoted at a, in the top of standard C, is an arm, E, the long end of which extends toward and above the presser and needlearms of the machine, but under the thread. b, as shown in Fig. l. Its short end projects beyond the standard a short distance.

XV is a weight guided in the standard C, which is slotted for that purpose, as seen in Fig. 2. The upper end of the weight is adapted to be hung up on the short end of 75 arm E, and to'facilitatetits engagement we secure a slotted springstrip, w, in the top of weight. This strip, beside suspending the weight from the arm, renders it easy to suspend it from a stationary pin, c, in the top of the standard C while the arm E is being adjusted. The weight, being iiXed in guides, cannot move outwardly to be hung over the arm or pin but the spring-strip can easily be pressed out to engage with either. The lower end of weight W is beveled, as shown.

F is the ratchet-lever.. This ispivoted at f to the standard C. Its upper end lies underV the weight and receives it when dropped. Because of the bevel of said weight the top of the ratchet-leveig/when the weight is dropped, is forced to one side. The lower end of this lever is provided with teeth, as shown, lwith which a pin, d, on the lever D engages to hold This effect of the spring 55 i said lever up. Aspring, G, holds the ratchetlever F to its engagement, and a small stop, g, limits itsmovement when released from pin d. 4

The operation of the devices we have described is as follows: The tension of the thread b when the machine is in operation is sufficient to hold. the longend of the arm E down, and thus said arm supports the weight W, which is suspended from its short end, Fig. 1 but when the thread breaks, the arm E being relieved, it trips the weight, which drops down upon the y upper end of the ratchet-lever F, forcing it to one side. This movement throws its lower or ratchet end in an opposite 'directiomwhereby it becomes disengaged from pin d', and the lever D thereupon falls down, slacking wire d, and, as before explained, throws the power de vice out of gear with the machine, which is thus stopped. Upon raisinglever D again, the pin d travels up an inclined edge, f, of ratchet-lever F, forcing it to one side until it engages with its teeth,whereupon the machine is started again. The lever D, in dropping, is received upon a buffer, I-I, as shown.

It is necessary at times to stop the Vmachine for other causes than the breaking ofthe thread, and if no other provision were made it would be difficult to release the pin d from the ratchetlever simply by moving thelever D. To accomplish this we pivot the end of lever D in such manner that it may be moved in a horizontal as well as in a vertical direction. This is shown in Figs. 1 and 3. An eyebolt, I, passes through a cross-base, c, of standard C. The end of lever D is slotted on the eye of said bolt, and is pivoted thereon by a small pin, z'. The eyebolt, which is a pivot, provides for the vertical movement of the lever, while the small pin provides for its side or horizontal movement. In this way the lever D may be released from the ratchet-lever by a side motion when desired. Having such a motion, it becomes,l

necessary'to hold said lever normally against the side of the standard in order to cause its pin dto engage with the ratchet-lever. This is done by a bolt, J, Fig. 3,which passes through the lever and through a slotted bearing or guide, j, on the side of the standard C. It has a spring, K, on its end,which operates against the back of the guide j, and a nut, j', on the bolt to hold the lever D in position.

Having thus described our invention, what we claim as new, and desire to secure by Lettersv Patent, is-

l. In a sewing-machine, a lever by the operation of which a power device is thrown in and out of gear with said sewing-machine, in combination with an arm held in position by the thread of the sewing-machine, a weight sliding in guides and tripped by the release of said arm upon the breaking of the thread, and a means affected by the falling weight for operating said lever to throw the power device out of gear with the sewing-machine, substantially as herein described.

2. In a sewing-machine, a lever by the operation of which a power device is thrown in and out of gear with said sewing-machine, in combination with an arm held in position by the thread of the'sewng-machine, averticallysliding weight tripped by the release of said arm upon the breaking of the thread, and a swinging ratchet-lever engaging with the power-lever and operated by the'falling weight to disengage and release said power-lever to throw the power device out of gear with the sewingv machine, substantially as described.

3. In a sewing-machine, the pivoted lever D, having a pin, d', and connected with the power device, and operating to throw said power device in and out of gear with the sewing-machine, in combination with the standard C, the arm E, pivoted in its top, and having one end extending under the thread of the machine, the sliding weight W in the standard, adapted to be suspended from the other end of said arm, and havinga beveled lower end, and the pivoted ratchet-lever F, adapted to receive the weightW upon its upper end and to engage with vthe pin d ofleverD with its lower end, substantially as'and for the purpose herein described.

4E. In a sewing-machine, the power-lever D and slotted standard C, having a pin, c, at its top, in combination with the pivoted arm E, the weight W, having a slotted spring-strip, w,whereby it is suspended from pin e or arm E at will, and the pivoted ratchet-lever F, all arranged and operatingsubstantially as and for the purpose herein described.

5. In a sewing-machine, the standard C and the power-lever D, having pin d', horizontal pivot I, and vertical pivot z', in combination with ratchet-lever F, substantially as and for the purpose herein described.

6. In a sewing-machine, the standard C, having slotted guide j, and the power-lever D,

having pin cl, horizontal pivot I, andvertical pivot z', the bolt J, passingy through said lever and slotted guide, and having a spring, K,- in combination with the ratchet-lever F, having spring G and the stop g, substantially as and for the purpose herein described.

In witness whereof we have hereunto set our IIO

Images