US258345A - Needle-threading attachment for sewing-machines - Google Patents

Description

(Model.) 2 Sheets-Sheet 1.y

F. G. ALTMMIN su F. POMME-R'. NEEDLE THRBADING ATTACHMENT-FOR SEWING MACHINES. No. 1258.345. PatentedMay 23 1882.

(Model.) zsheetggsheez 22. F. G. ALTMANN 8v F. POMMER.

NEEDLE TEEEADING ATTACHMENT EOE SEWINGMAGEINES. No. 258,345. Patented MayZB, 1882 W mmm e UNITET)l STATES PATENT OFFICE.

FRANK G. ALTMANN AND FRED POMMER, OF EDINA, MISSORI.`

`rsiEEuLE-Tl-imaaoilve ATTACHMENT Fonl SEWING-MACHINES.

SPECIFICATION forming* part of Letters Patent N0. 258,345, dated May 23, 1882, if

Application filed March 4, 1882.

Toall whom it may concern Be it known that we, FRANK Gr. ALTMANN and FRED POMMER, of Edina, in the county of Knox and State of Missouri, have invented certain new and useful Improvements in Needle- Threading Attachments for Sewi ng-Machines; and we do hereby declare that theiollowing is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanyin g drawings, which form a part of this specifica tion.

' Figure 1 is a perspective view of our improved needle-threadingdevicc for sewin g-machines. Fig. 2 is a vertical sectional view taken through the needle-bar and threadingtube. Fig. 3 is a rear view of the needle-bar, threading-tube carrier, and attachments. Fig. 4 isadetail view, in perspective, of the threading-tube and the lower end of the carrier. Fig. 5 is a vertical sectional View through the spring-catch L. Fig.4 6 is a detail view of the cam-plate N 5 and Fig. 7 is a detail view, in perspective, of the operating Vparts of our in, vention.

Corresponding parts in the several figures are denoted by like letters of reference.

This invention relates to needle-threading attachments for sewing-machines; and it consists in certain improvements in the construction ofthe same which will be hereinafter full y described, and particularly pointed out in the claims.

-In the drawings hereto annexed, A refers to the needle-bar, which is mounted in the usual manner to slide vertically in the frame B of the machine.

C is a vertically-sliding rodJ arranged in suitable bearings in the frame B, adjoiningthe needle-bar A. The rod G has at its lowervend a laterally-proiecting arm, l), provided with a downward-projecting bracket, E, to which is hinged a frame, F, carrying'the threading-tube G, which is preferably of 'the construction described in previous patents to ourselves, and numbered,246,360 and 252,007, respectively. The upper end of the frame F is rounded, as shown at H, so that it will readily enter atriangular notch, I, in a bracket, J, secured at the lower end of the frame-piece B 5 or the said (Model.)

end of frame-piece B, so as to engage the a'rm D of rod C and retain the latter in a raised position. By pressing a stud, L, of catch K the latter is released, and the rod C, which is provided vvith a stud or handle, M, by which it may be conveniently manipulated, maythen4 be lowered. The construction and arrange ment of the spring-catch may be modified Without changing the spirit of our invention.

The needle-bar has upon its front side a pivoted cam-plate, N, provided with a iinger, O, a tooth, P, and a shallow notch, Q. Said camplate is held in its normal position by a sprm g, R, secured to the side of the needle-bar and engaging the notch Q. Spring E has at its upper free end a rounded hook, S, capable of engaging the tooth l? of the camplate.

The threading-tube carrier G has upon its side, near the upper end, a studor pin, T, projecting through a slot, U, in, frame B, so as to be capable of engaging the finger O of camplate N. Stud T also engages a pin, V, projecting laterally from the needle-bar,when the latter is in a raised position and the rod O is lowered, to bring the threading-tube in a line with the eye ot' the needle. The pin V thus serves as a regulator to stop the downward motion ot' the rod C whenn the threadingtube registers with the eye of the needle. To prevent the rod C from sliding down too low when the needle-bar is lowered, it has a stud,W,

Yengaging the upper edge of the socket in which the said rod G slides.

- The operation of our invention is asfollows: The needle-bar being brought to its highest point,or nearly so, the catch K is disengaged from the rod C, which gray then be lowered. As soon as the frame F is clear vof the notchI the weight of the threading-tube causes it to assume ahorizontal position, with its front end in contact with the needle, thus causing it to register with the needle-eye when the stud T of rod C comes in con tact with the pin Vof the needle-bar. The needle may now be threaded by passing the thread through the tube Gr and the eye of the needle. The rod C, with the threadingtube, is automatically returned IOO to its raised position, where it is held by the catch K in the following manner: When the machine is started and theneedle-bar movesin a downward direction the tingerOof cam-plate N strikes the stud T of rod C, which,being stationary, causes the oam-plate to move upon its pivot until the tooth P engages the hook S of spring R. In this position it remains on the upward stroke of the needle-bar, thus causing the finger O to engage the underside of stud T of rod G, which is thereby lifted until said rod reaches itsnormal position, where itis held by catch K. Frame F at the same time engages the triangular notch I, thus causing thethreading-tube `to swing outward from theneedleinto a diagonal position, where it cannot interfere with the operation ofthe needle-bar, and where it forms anincliued guide for the thread, which passes 'through it to the needle. The needlebar in the meantime continues its upward course, when the linger O will bear upon the underside of stud T with sufficient pressure to disengage the spring-hook R S from the tooth P and turn the cam-plate N upon its pivot until it resumes its normal position, with the springR engaging the shallow notch Q.

We would have it understood that, without changing thespirit of our invention, the camplate N,with its attachments, may be mounted upon the rod C, the stud T of which is then transferred to the needle-bar. The slight 'modications in construction which lbecome necessary by such interchange of parts will readily suggest themselves to a skilled mechanic.

Having thus described our invention, We claim and desire to secure by Letters Patent of the United States- 1. In a needle-threadingattachmentfor sewing-machines, the sliding rod C, carrying the hinged frame F, beveled at H, and havingthe threading-tube Gr, in combination With the bracket J, having notch I, as and for the purpose set forth. t

2. The threading-tube carrier C, having pin or stud T,in combination with the needle-bar A, having pin V, as and for the purpose set forth.

3. The needle-bar A, having pivoted caniplate N, provided with the nger O, tooth P, and shallow notch Q, spring R, having hook S, and pin V, in combination with the threadingtube carrier C, having pin or stud T, as and for the purpose set forth.

In testimony that we claim the foregoing as y t

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