US362442A

US362442A - Button-hole attachment

Info

Publication number: US362442A
Authority: US
Publication date: 1887-05-03
Anticipated expiration: 1904-05-03

Description

(ModeL) 2 Sheets-Sheet 1.

' J. M. ,GRIEST;

v BUTTON HOLE ATTACHMENT. No. 362,442. Patented May 3', 1887.

gay i 2% N PETERS, Pnuwfim m hur. Wnshinglon. lz'cv (Mode'L) 2 Sheets-Sheet '2.

J, M. GRIE-ST. BUTTON HOLE ATTACHMENT.

No. 362,442. Patented May 3, 1887.

braced by my Patents Nos. 332, 251 and 335,126,

or lever operated by the needle-bar of the ma- JOHN M. GRIEST, OF

BUTTON-HOLE PATE T Orrin.

CHICAGO, ILLINOIS.

ATTAC H M ENT.

SPECIFICATION forming part of Letters Patent No. 362,442, dated May 3, 1887.

Application filed August 21, 1886. Serial No. 211,486. (ModeL) To all whom it may concern:

Be it known that I, J oHN-M. GRIEsT, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements'in Button-Hole Attachments for Sewing-Machines, of which the following is aspecification, reference being had therein tothe accompanying drawings.

My invention relates to that class of buttonhole attachments for sewing machines em in which the longitudinal or feeding movements of the workclamp are effected by a double screw intermittingly rotated from an arm chine, and in which the vibrating or lateral movements of the said clamp are produced by a threepointed cam rotating coineidently with the said feeding-screw, the object of the present invention being to simplify the construction and to render more certain and positive the operation of certain features of the device to which my patents aforesaid relate.

In the drawings, Figure 1 is a plan view of my improved attachment. Fig. 2is a similar View with some of the parts removed. Fig. 3 is a side view of my device. Figs. land 5 are sectional end views thereof. Fig. 6 is a crosssection on line 6 6, Fig. 1. Fig. 7 is a detail perspective view of the sliding bar and its arm and yoke. Fig. 8 is an enlarged sectional detail of the sliding bar and its adjustable arm. Fig. 9 is a detail perspectiveview of the sliding plate, and Fig. 10 a similar view of the retaining-spring for the yoke surrounding the double screw.

A denotes the base-plate of the attachment, said plate having two upwardly-turned or vertical portions, a and a, forming standards to support the operating mechanism for the feedplate B, the forward end, I), of which forms the lower jaw of the work-clamp, the upper jaw, b, of the said clamp being carried by a spring-lifted lever, b pivoted to the plate A and forced against the work in clamping by a cam-lever, b The fulcrum-pin c, on which the feed-plate B swings laterally to produce the necessary side movements for effecting the over-edge stitching of the button-holes, is carried by a plate, O, adjustably secured to the plate A, said pin projecting through a central slot in the plate B and into a slot in the plate A, in which latter slot the said pin is ad ustable, for the purpose of varying the lateral movements of the cloth-clamp to change the bight of the button-hole stitches.

D is a double screw journaled in arms or projections a of the standard a. To the rear end of the said screw is attached the threepointed cam E, working'in a laterally-sliding yoke, e, having steadying lugs or pro ections 6 extending through the standards a and a and connected with the feed-plate B, as will be hereinafter described, so as to impart lateral movements thereto from the cam E. To the forward end of the screw D is attached the ratchet-wheel F,- having six teeth, said wheel being operated .by the spring-presscd pawl g, pivoted to the yoke G, turning loosely on the shaft of the screw D, and having teeth g meshing with similar teeth, h, on the operating-1e ver H, pivoted at its rear end to the standard a, and adapted at its forward end for engagement with a screw or other projection on the needle-bar of the machine.

The parts of my device thus far described are or may be essentially the same as in the attachments described in my patents hereinbefore referred to, and I will now describe the parts to which the present improvements relate. 7

To the feed-plate B is attached a small plate or arm, b*, having an upwardly-projecting portion provided with a slot, b, into which enters a downwardly-extending lug or tail, z, of a yoke, I, surrounding the double screw B and rigidly attached by its shank i to a sliding bar or shaft, J, supported by the arms a of the standard a. The bar or shaft J 15 provided with two curved arms, K and K, the

.latter of which is adj ustably secured to said shaft by a set-screw, k. 'Ihebar or shaft J is preferably provided with a series of holes or recesses, j, the distances between the centers of which are the same as the distances between the centers of the threads on the double screw D, and thescrew k is preferably pointed, as shown in Fig. 8, so that it will readily center itself to any one of the said recesses to which it may be adjusted. The cam E is provided with a pin or project-ion, e", and the ICO ratchet-wheel F also has a similar pin or projection, f. The central opening in the yoke I is somewhat larger than the diameter of the double screw D, so that only one side of said yoke need be in engagement with said screw, and the sliding bar or shaft J, to which the said yoke is attached, is rocked slightly at intervals to bring one side or the other of said yoke into engagement with either the upper or lower side of said screw, for the purpose of reversing the movement of the feed-plate and the work-clamp carried thereby by means of the engagement of one or the other of the arms K and K with the pins or projections f and 0 as will be hereinafter more fully explained.

The yoke I is provided with a lug or project-ion, i which is engaged by a spring, L, attached to the standard a by the pivot screw a for the operating-lever H, said spring having a forked right-angular portion, L, at its forward end to embrace the shaft of the double screw D, and thus prevent the spring from moving vertically when the lug '11 is being moved from one side to the other of the ledge L", pressing against said lug. The office of the spring L, operating in connection with the lug i is to hold the yoke I in either of the positions into which it may be forced by the action of the pins f and c on the arms K and K of the sliding bar or shaft J.

The lateral movements of the sliding yoke c are communicated to the feed-plate B (to vibrate the latter in the formation of the overedge stitches) through the shipper-lever M and screw-pin m, which latter engages the said plate by the slot 71 therein, the said lever be ing normally held rigid with the said yoke, so that the lateral reciprocating movements thereof are imparted to the said plate to vibrate the same on its fulcrum-pin 0 through the said screw-pin m.

The lever M is provided with a slot, m, to admit of the variation of the position of the said screw-pin to increase or diminish the distance between the said pin and the fulcrumpin m by which the said lever is pivotally attached to the sliding yoke e, and by virtue of this construction the ship-over movements of the work-clamp may be varied to change the distance between the rows of stitches on opposite sides of the button-holes. The ship per-lever M is provided with a lug, in, engaging an arm, n, on a sliding plate, N, having arms a ,embrael ng the sliding bar J, which supports the said plate, the latter being provided with a spring or spring arm, a", the free end of which is adapted to engage notches a in the top of the standard a. The plate N is also provided with an arm, M, in the vertical inner portion of which is pivoted a switch, 0, engaging a short section, (I, of the double screw D, which latter is mutilated by the omission of one or more threads for the purpose of separating the said short section (I from the main portion of the screw by which the yoke I is operated. Sufficient space is left on both sides of the short screw-section d, so that when the switch 0 is on either side thereof it will be out of engagement with the threads of the said section until the sliding plate N is moved slightly in one direction or the other by the engagement of one of the arms K or K of the bar J with one of the arms a of the plate N to bring the switehinto engagement with one side or the other of the screwscction d, and the latter will then slowly shift the plate N the distance determined by the length of the said scrcwsection. This movement of the plate N causes the shipper-lever M to turn on its fulcrum-pin m and by its pin on shift the feed-plate to bring the second side of the button-hole beneath the needle after the first side of the hole has been completed. As the shipover movement consumes the time required to form several stitches, the buttonhole will be properly barred at both ends and the barring stitches will he so spread out and disposed as to make a neat finish. During the ship-over movement the lever M (although turning slowly on its fulcrum'pin m") is still practically rigid with the yoke 0, so that the vibratory movements of the feed-plate B (due to the lateral reciprocations of the said yoke and lever) still continue, although the position of the said feed-plate is gradually changed to shift the work and thus cause the bar to be formed while the unworked side of the but ton-hole is being brought over beneath the needle.

Vhen the device is set in operation with the work in the cloth-clamp and the operating-lever in engagement with the needle-bar of the machine, the vibrating movements of said lever will impart an intermittent rotary move ment to the double screw 1) through the pawland-ratchet mechanism above described, and the three-pointed cam E, rotating with said screw,will reciprocate the sliding yoke c, and, through the shipperlever M, cause the feedplate and the cloth-clamp carried thereby to be vibrated to give the proper movements to the work necessary for the formation of the over-edge or button-hole stitches. The rotation of the screw D causes the yoke I, engaged therewith, to move lengthwise of said screw, and the said yoke being connected with the fced-plale, as above described, the latter is caused to travel lengthwise until one or the other of the arms K K, secured to the bar or shaft .l', which travels with the yoke I, comes into position to be engaged by one of the pins or projections f or c", when the said bar or shaft is rocked slightly, and the yoke I is caused to engage the side of said double screw opposite to that which was previously in engagement, so that the movement of the yoke and of the feed-plate operated thereby is re versed. Just prior to this reversal of the feed ing movement one of the arms a of the sliding plate N will be engaged by one of the arms K or K of the bar J, and the ship-over movement of the eloth-clamp is effected in the manner above described. The plate N is reiIO IIS

taiued in either of its stationary positions by the engagement of the end of the spring a in the notches a" of the standard a.

To rock the shaft J, as above described, the arms K and K are moved bythe pins f and c from the position indicated by full lines to the positions shown by dotted lines in Figs. 4 and 5. i

I claim 1. In a button-hole attachment, the combination, with a laterally-vibrating feed-plate and the work-clamp carried thereby, of an intermittingly-rotating double screw, a sliding bar or shaft having arms, a yoke connected with said bar or shaft and feed-plate and embracing said screw, and devices, as pins f 2 e operatively connected with said screw and adapted to engage said arms to change the position of said yoke, substantially as set forth.

2. The combination, with the laterally vibrating feed-plate and its work-clamp, of an intermittingly-rotating double screw, a yoke connected with said feed-plate and loosely embracing said screw, and a sliding bar or shaft by which the said yoke is carried and which is adapted to be rocked slightly to bring the said yoke int-o engagement with the opposite sides of said screw to move the said feed-plate in opposite directions, substantially as set forth.

3. The combination, with the feed-plate and workclainp, of a sliding bar or shaft having two arms, one of which is adjustable, a double screw, a yoke connected with said bar or shaft and feed-p1ate, and pins or projections turning with the said screw and adapted to engage said arms to rock the said sliding bar or shaft slightly and thusv change the position. of said yoke to reverse the movement of the said feedplate, substantially as set forth.

4. The combination, with the feed-plate and work-clamp, of the intermittingly rotating double screw, the sliding bar or shaft having a series of holes or notches, the distances between the centers of which are equal to the dis tance between the centers of the threads of said screw, a yoke carried by said bar or shaft, fixed and adjustable arms attached to the latter, and'a screw for securing said adjustable arm inany desired position, substantially as Set forth.

5. The combination, with the feedplate, work-clamp,and the sliding bar or shaft and its arms, of the yoke connected with said bar or shaft and feed-plate, the intermittingly-rotating double screw, the cam E, provided with the pin or projection e", and the ratchet-wheel F, having the pin or projection f substantially as set forth.

- 6. The combination, with the feed-plate, work-clamp, and double screw, of the sliding bar or shaft and its arms, the yoke connected with said bar or shaft and feed-plate, the shipper-lever, and a sliding plate, N, connected with said shipper-lever and adapted to be engaged by the arms of the said sliding bar or shaft to change its positions, substantially as set forth.

7. The combination, with the feed-plate, work-clamp, and the double screw mutilated to form a short section, d, of the shipper-lever M and the sliding plate N, connected with the shipper-lever, and the switch 0, carried by the said sliding plate, substantially as set forth.

8. The combination, with the feed-plate,

work-clamp, and the double screw D, muti-- lated to form the short section d, of the ship per-lever-M, the sliding plate N, connected with the said shipper-lever and provided with the retainingspring or spring-arm ad, the notched standard a, .with which the said spring-arm engages, and the switch 0, carried by the said sliding plate, substantially as set forth.

9. The combination, with the feedplate, work-clamp, and the double screw provided with the cam E, of the sliding yoke e, operated by said cam, the shipper-lever M, pivoted to said yoke and connected with said feedplate, the sliding bar N, having an arm, a, eugaging the said shipper-lever, and devices for shifting the position of the said sliding plate to operate said shipper lever and thereby effect the ship-over movement of the feedplate and work-clamp, substantially as set forth. 1

10. The combination, with the double screw, of the yoke I, loosely embracing said screw, the sliding bar or shaft J, by which the said yoke is carried, and means by which the said shaft is rocked slightly to bring the said yoke into engagement with the opposite sides of the said screw, and a spring for retaining said yoke in its different positions, substantially as set forth.

1.1. The combination, with the double screw, the sliding and rocking bar or shaft J, and the yoke I, carried by the latter and having the lug or projection i of the spring L, having the ledge L substantially as set forth.

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

7 JOHN M. GRIEST.

Witnesses:

GEORGE L. Form, E. M. Snmns.