US600111A - Attachment for sewing-machines - Google Patents

Description

N. P. DUNCAN. 'ATTAGHMENT PoR SEWING MAGHIN'BS.

'(NoModel.)

` No. 600,111. Patented Mar. 1.1898.

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UNijTED STATES PATENT OFFICE.

NATHANIEL P. DUNCAN, OF HANFORD, CALIFORNIA.

ATTACHMENT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 600,1 1 1, dated March 1, 1898. Appncflnon nea Juiyzg, 1897. saranno. 646,363. (roma-.1.)

To all whom, t 17mg/ concern:

Be it known that I, NATHANIEL P. DUNCAN, a citizen of the United States, residing at Hanford, in the county of `Kin gs and State of Oalifornia, have invented certain new and useful Improvements in Attachments for Sewing- Machines; and I do hereby declare the following to be a full, clear, and exact description of said invention, such as will enable others skilled in the art to which it most nearly appertains to make, use, and practice the same. v

This invention relates to improvements in hand-operated driving attachments foil sewing-machines; and it consists in the novel arrangement and construction of parts whereby the driving attachment is substituted for the foot-treadle attachment.

In the drawings, Figure 1 isa side elevation of the legs and driving-wheel of a sewing-machine having my attachment applied thereto. Fig. 2 is a front elevation of the legs of a sewing-machine on the one side, together with the driving-wheel and my attachment applied thereto. Fig. 3 isa side view in detail of the hand-operated lever detachedfrom the machine. Fig. 4 is 'a detail view,in side elevation, of the hanger, by means of which the lever is attached to the leg of a sewingmachine. Fig. 5 is adetail view of an alternative form of hanger for the lever. Fig. 6 is a detail view of the screw-threaded conebearing, by means of which the treadle is mounted on a machine and showing the cone end provided for mounting the lever. Fig. 7 is a'detail view of the pitman connection,

- showing the construction by means of which it is adjusted to the various sizes of perforation in different pitmen.

The style of sewing-machines to which my attachment is preferably applied is to what is known as the Singer sewing-machine. In this style of machine the/treadle is mounted in cone-bearings between the one side of the machine removed from the driving-Wheel and a bracketed extension which is thrown out from the other side of the machine and forms a part of the cross-brace. To apply my attachment to this style of machine the screw that carries the cone for the bearing of the treadle on the side next the bracket before mentioned is provided with an outward-extending cone A'. In line with the cone A and extending toward the same is a screw A2, provided with the cone A3 and also with the lock-nut A4. This screw A2 is mounted in the extension A5, suitable thread being provided in the end thereof. The extension A5 is swung on the side of the frame or leg X. This is" accomplished by removing the ordinary bolt provided for the attachment to the cross-brace X' to the frame X and substituting therefor a bolt A6 of greaterlength. The bolt A6 is secured rigidly in position by means of the nut AT and is lready to receive the extension A5, the upper end of which is provided with a perforation adapted to extend over the inner end of the bolt A6 and to rest against the nut A7. When placed over the end of the bolt A6, the extension A5 is secured rigidly in position by setting up the nut A8 firmly against it.

The lever B is formed to the shape shown in Fig. 3 of the drawings, the curve B being given'to avoid the guard on the iiy-wheel of the machine. It is provided on the lower extension with the boss B2, extending to either side therefrom. The boss is provided with inverted conical depressions to receive the cones A A3. In mounting the lever B on the machine thescrew A2 is withdrawn until the whole boss B2 will pass between the ends of the cones. The conical depression on the side next the cone A is then adjusted and the screw A2 driven forward into the conical depression on its side, and when rmly in position the lock-nut A4 is driven against the eX- tension A5 tightly. The cones AA3 are formed of long and sharply-tapered extensions, so that when the lever is mounted between the same it will be held firmly against lateral movement.

In applying this attachment to the sewingmachine the idea is to substitute it for the usual foot-power driving-gear, and with this idea in view the pitman X3 is disconnected from the foot-treadle and into the hole or connecting-aperture left the pin B3 is extended and secured. This arrangement of the parts having been attained, the sewing-machine may be operated by throwing thenpper end of the lever B backward and forward, which, causing the lever to swing on the pivot formed by the cones A A3, produces the reciprocating action of the pitman X3 and causes the iiy-wheel ofthe machine to rotate.

IOO

The upper end of the lever is provided with a handle B4, which is pivotally connected to the upper end of the lever B, as shown in Figs. 1 and 3. By means of the pivotal action on the handle B4 to the lever B the forward and backward movement of the lever may be readily accomplished by the operative withoutfollowing the arch of the movement of the lever about its pivot; also, by thus connecting the handle B4 to the lever the hand of the operative may be maintained at various angles with reference to the end of the lever, and by thus alternating the position of the hand it may be rested.

To prevent the handle B4 swinging against the guard of the fly-wheel or into an inconvenient position, it is provided with an extension B5, so that the handle will not pass the lever when released by the operator.

In the form of the mounting shown in Fig. 5 of drawings there is provided for the style of machines wherein the treadle is mounted 011 a cross-rod that extends between the sides or legs of the machine. This alternation calls for the use of clips C' C', which are mounted on the cross-bar X4 and set in position by the set-screws C. `The clips C are in every other respect similar to the extension A5 and are provided in their ends (which in this form are extended upward instead of downward) with the screws A2, having the cones A3, which are seated in the depressions provided in the boss B2 of the lever B. Vhen the machine is provided with this mounting for the lever, the connection and operation of the lever in its relation to the pitm an X3 are the same as above described.

Having thus described this invention, it is claimed- 1. An attachmentfor sewing-machines,con sisting in the combination of a lever pivotally connected to the pitman of the driving-wheel of the machine and fulcrumed on the frame of the machine and extending above the bearing of the said driving-wheel; with afulcrumbearing for the said lever mounted on the said frame and adapted to be separated laterally to permit the rapid adjustment and removal ofthe lever; and an attaching device adapted to connect the lower end of the said pitman and lever, substantially as described.

2. An attachmentfor sewing-machines conand recede the said side to and from the said' lever; and an attaching device adapted to connect the lower end of the said pitman and lever, substantially as described.

3. An attachment for sewing-machines consisti'n g in the combination of a lever connected to the pitman of the driving-wheel and 'fulcrumed on the frame of the machine and extended forward to above the bearing of the said drivin g-wheel; with pivotal bearings consisting of screw-bolts having conical-shaped ends turned toward each other and adapted to extend into and be withdrawn from suitable sockets on each side of the said lever; brackets secured to the frame of the machine and having threaded perforations to receive the said screw-bolts and an attaching device adapted to connect the lower end of the said pitman and lever, substantially as described.

4. An attachment for sewing-machines consisting in the combination of a lever pivotally connectedto the pitman of the driving-wheel and fulcrumed on the frame of the machine and extended to above the bearing of the said driving-wheel; fulcrumed bearings for the said lever consisting in brackets secured to the frame of the machine and being provided with screw-bolts having conical-shaped ends and mounted in threaded perforations in the said brackets to be advanced to and withdrawn from suitable sockets on each side of the said lever; an elongated handle pivotally mounted on the upper extension of the said lever and adapted to extend toward the front of the machine; and an attaching device adapted to connect the lower end of the said lever to the said pitman, substantially as described.

In testimon'y whereof I have hereunto set my hand this 13th day of July, 1897.

\ NATHANIEL I). DUNCAN.

Witnesses BALDWIN VALE, MAYNARD HARMs.

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