US1892010A

US1892010A - Sewing machine attachment

Info

Publication number: US1892010A
Application number: US594255A
Authority: US
Inventors: Rudolph J Sailer
Original assignee: Singer Co
Current assignee: Singer Co
Priority date: 1932-02-20
Filing date: 1932-02-20
Publication date: 1932-12-27
Anticipated expiration: 1949-12-27

Description

R. J. SAILER Dec. 27, 1932.

SEWING MACHINE ATTACHMENT Filed Feb. 20, 1952 2 Sheets-5heet Rudy/z J. S'az'ier flaw 1mg Dec. 27, 1932.

SEWING MACHINE ATTACHMENT Filed-Feb. 20, 1932 2 Sheets-Sheet 2 I amen kw jiuaovk J Sazzer R. J. SAILER 1,892,010

Patented Dec. 2 7, 1932 UNITED STATES PATENT QFE EGE RUDOLPH SAILER, or TOWNLEY, new .in-nsny, Ass onon TD run s nonn MANU- FACTUBING oomrena', or nrszannrn, new nns Y, a conronnrron on NEW JERSEY SEWING laIACI-IINE ATTACIQVIENT Application filed February 20, 1 932.

This invention relates to sewing machine parts and attachments which are sh1fta ble from one to another position on the sew ng machine. More particularly, the invent on relates to sewing machine work-guiding attacliments which are shiftable from a normal operative position to an out-of-the-way or inoperative position.

The invention has for an object to provide a sewing machine part or attachment with a simple and effective throw-in and throwoutmechanism which may be readily and quickly operated at the will of the operator and which will properly retain the part or attachment in either of its two positions without further attention of the operator and without the necessity of loosening and tightening fastening screws or of manipulating s ecial locks, catches, or the like.

A further object of the invention is to provide for the ready adjustment of the attachment in its operative position without interfering with the functions or effectiveness of the throw-in and throw-out mechanism.

/Vith the above and other objects in View, as will hereinafter appear, the invention comprises the devices, combinations, and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of two specific embodiments of the invention, from which the several features of the invention and the advantages attained thereby will be readily understood by those skilled in the art.

Fig. 1 is a front elevation of a work-guiding attachment or edge-guide embodying the invention andapplied tothe needle-bar-supporting head of a sewing machine. Fig. 2 is a side elevation of the device from the left of Fig. 1. Fig. 3 is a top plan view of the device shown in Figs. 1 and 2. 4 is a disassembled perspective view of certain of the parts of Figs. 1, 2 and ,8. Fig. 5 is a front elevation of a :worlcguiding attachment or strip-folding guide embodying the invention in a modified form and arranged on the needle-bar-supporting head for movement of the attachment in an up-and-down direction Serial .No. 594,255.

as distinguished from a lateral movement, such as indicated in Fig. 1. Fig. ,6 is a View of the parts shown in dotted lines in Fig. 5. Fi 7 is a perspective view .of the supporting bracket member of the device and Fig. 8 is .a top plan view ,of the device shown in Fig. 5. Referring to Figs. 1, 2, 3 and 4, 1 is the usual head at the end of the sewing machine brack- ,e.t-arm. Secured to the head 1 by screws 2 is the foot-plate 8 of a bracket 4 having an ear 5 bent at right angles to the plane of the body-portion l .of the bracket. The screws 2 pass through vertical slots 6 in the footplate 3 to provide for vertical adjustment of the bracket ,4 and the parts carried thereby. Threaded into the bracket Al is a shouldered pivot-screw 7 which supports a carrier-plate 8 flat against the body-portion of the bracket 4. "The screw 7 also pivotally supports the carrier-lever 9 for the edge-guide 10. The carrier-plate 8 has an car 11 bent at rightangles to it, so as to lie parallel to and spaced from the ear 5 of the bracket 4. There is threaded into the car 11 the stem 12 of an adjusting screw 12, the grooved shank 13 of which passes through the vertical slot 14 in the ear 5 of the bracket .4. By means of the screw 12 a limited adjustment of the carrier-plate 8 may be made relative to the bracket 4; there being sutficient play between the side walls of the groove 13 and the faces of the ear 5 to permit of a limited tilting of the screw 12 from a right-angle position relative to the ear 5 as such screw moves circularly about the pivot-screw? as a center.

Pivotally mounted at 15 on the carrier- .pla-te 8 is an operating lever 16 which is connected by the link 17 -.to the edge-guide carrier-lever 9. The head .of the lever 16 is formed with two angularly related

straight edges

18 and 19 with an intermediate camnose 20. WVhen the edge-guide is in its operative or full-line position, Fig. l, the straight edge 19 of the head of the operating lever 16 is in engagement with theedge-g'uide carrier-lever 9, which latter is in engagement with a stop-shoulder 11 constituted by one side of the ear 11 of the carrier-plate 8. The link 17 is also in ,or near alinement-with the pivot-screw so that the lever 16 and link 17 constitute a toggle-device which looks the edge-guide carrier-lever 9 against accidental displacement from its full line or operative position.

There is a further locking effect of the lever 16 upon the lever 9, independent of the locking effect of the toggle-device, due to the relation of the pivot-screw to the straight edge 19 which latter constitutes a locking shoulder. This relation'is such that a line i-a through the center of the pivot-screw l5 and the cam-nose 20 adjacent the end of the locking shoulder 19 is substantially normal to the locking shoulder, so that any force tending to displace the edge-guide to the right, Fig. 1, is positively resisted or blocked by the portion of the head of the lever 16 directly between the lever 9 and the pivot 15.

By merely swinging the lever 16 upwardly the operator may quickly and easily swing the edge-guide 10 to its out-of-the-way or inoperative position, shown in dotted lines in Fig. 1. There is a distinct binding or cramping action. of the cam-nose 20 upon the lever 9 as the parts approach their dotted line positions. This binding action of the camnose 20 upon the lever 9 at or near its out-ofthe-way position is due to the shaping of the cam-nose 20 which is such that as the parts are approaching their dotted line positions, the movement of the cam-nose 20 toward the right is somewhat slower than the movement of the lever 9 caused by the link 17. The binding or cramping action of the cam-nose upon the lever 9 at the dotted line position of the parts, Fig. 1, prevents accidental displacement of the guide 10 from itsout-of-the-way position.

The edge-guide, as shown in Figs. 1, 2, 3;

' of the sewing machine and is adjustable toward and from the needle n by virtue'of the provision of slots 26 in the shank 24: of the edge-guide 2a. The strip-guide 25 is provided with a block 28 adjustable within and widthwise of its passageway to accommodate sweat-bands of difierent widths; The stripguide 25 is adjustably secured to the cylinderbed 27 by the usual screw-and-sl-ot expedient 29. i

Referring now to Figs. 5, 6, 7 and 3,30 represents the bracket-arm head of a sewing machine having two needles 31, a .presser-foot 32 and a bed 33. Screwed to the head is a bracket 34 on which a carrier-lever 35 is mounted by a pivot-screw 36. The pivotby the screw-and-slot expedient 38 to the bracket 34.

Fulcrumed on the carrier-plate 37 by means of the screw 39 is the throw-out lever 40 which is connected by the link &1 to the carrier-arm 35. The carrier-arm 35 is shown as carrying a strip-folding guide 42 such as is commonly used for shirt front centering operations.

The lever 40 has a straight edge or looking shoulder 43 which clamps the carrier-arm 35 against the stop-shoulder 43 of the carrierp-late 37 with the folding guide 42 in its operative or full-line position, in which position the link 41 is in ornear alinement with the pivot-screw 39 and acts as a locking toggle-device. The'lever 40 is also formed with a cam-nose 14 shaped to bind upon or cramp the lever 40 as the latter approaches its outof-theway position, Fig. 6, (also shown in dotted lines in Fig. 5), to prevent accidental displacement of the guide 12 from such position. This binding action is not so severe that it cannot be overcome by a purposeful downward movement of the lever 40 by the operator. It will be observed that the line 6-5, Fig. 5, through the ,pivot-scew 39 and the end of the locking shoulder L3 adjacent the cam-nose= 44 is substantially normal to. the locking shoulder 43 in the full line position of the parts. Spring washers 7 15, 36

and 39 are preferably provided on the respectivepivot-

screws

7, 15, 36 and 39 to facilitate manufacture by compensating for slight variations in stock thicknesses and screw length dimensions. I

Having thus set forth the nature of the invention, what I claim hereinis j1.- In a sewing machine attachment, supporting means, an arm pivotally carried by said means for movement from operative position to an 'out-of-the-way position, a workengaging device operatively connected to said arm, a manually operated lever fulcrumed on said supporting means, a link-connection between said lever and arm, and a cam-nose on said lever constructed and arranged to wedge against said arm at or near the out-of-the-way position of the latter.

2. In a sewing machine attachment, supporting means, an arm pivotally carried by said supporting means for movement from an operative position to an out-of-the-way position, a work-engaging device operatively connected to said arm, a stop, a manually operated lever having a locking shoulder for clamping said arm in operative position against said step, and a link-connection between said lever and' arm for retracting the latter to its out-of-the-way position, said lever-having a cam-nose adapted to wedge against said arm as the latter approaches its out-of-the-way position.

3. In a sewing machine attachment, supposition of the parts, and a cam-nose on said lever constructed and arranged to wedge against said arm at or near the out-of-thevay position of the latter.

a. In a sewing machine attachment, a bracket, a carrier-plate, a carrier-arm, a common fulcrum screw for said plate and arm, a workengaging element on said carrier-arm, a manually operated lever mounted on said carrier-plate and connected to said carrierarm to rapidly shift the latter from an operative position to an out-of-the-way position, and means permitting said carrierplate to be adjusted about said fulcrum screw for adjustment of said work-engaging element in operative position.

5. In a sewing machine attachment, a support, an arm fulcrumed on said support, a work-engaging element operatively connected to said arm, a stop-shoulder for said arm on said support, a manually operated lever fulcrumed on said support, means on said lever for locking said arm against said stopshoulder, and a link-connection between said lever and arm for retracting the latter from operative position.

In a sewing machine attachment, a pivotally mounted arm, a work-engaging device operatively connected thereto, a pivotally mounted operating lever, a link-connection between said arm and lever, said lever having a cam-nose and a straight locking shoulder in engagement with said arm and substantially normal to a line through the fulcrum of said lever and said cam-nose when said arm is 5 in its normal operative position, said lever being movable to swing said arm out of operative position.

7. In a sewing machine attachment, a sup port, an arm fulcrumed on said support, a work-engaging element operatively connected to said arm, a stop-shoulder for said arm on said support, a manually operated lever fulcrumed on said support, and a link-connection between said lever and arm for retracting the latter from operative position, said link being in or near alinement with the fulcrum of said manually operated lever when said arm is in engagement with said stop-shoulder.

S. In a sewing machine attachment, a support, an arm fulcrumed on said support, a work-engaging element operatively connected to said arm, a manually operated lever fulcrumed on said support and having a shoulder in engagement with said arm when said arm is in normal operative position, and a link connection between said lever and arm for retracting the latter, said link connection being in or near alinement with the fulcrum of said lever in the normal operative position of the parts so as to act as a locking toggle device.

In testimony whereof I have signed my name to this specification.