US3872811A

US3872811A - Darning and embroidery attachment

Info

Publication number: US3872811A
Application number: US507325A
Authority: US
Inventors: Karl Weber
Original assignee: Singer GmbH
Current assignee: Retail Holding NV
Priority date: 1974-09-19
Filing date: 1974-09-19
Publication date: 1975-03-25
Anticipated expiration: 1992-03-25
Also published as: JPS5141246U

Abstract

A unitary molded darning and embroidery attachment for a sewing machine. A plastic clamping member suitable for attachment to a sewing machine presser bar, and a plastic darning and embroidery member, including a striker arm acted on by an endwise reciprocating needle bar of a sewing machine over a portion of its endwise reciprocation, are joined by a resilient member integrally molded with the clamping member and darning member. The motion imparted to a darning foot portion of the darning member by the action of the needle bar on the striker arm, which is utilized to lift the darning foot from the work material in order to allow the work fabric to be moved, is effectively isolated from the clamping member and the presser bar by the integrally molded resilient member.

Description

United States Patent [111 3,872,811 Weber Mar. 25, 1975 DARNING AND EMBROIDERY Primary E.\'aminer-H. Hampton Hunter ATTACHMENT Attorney, Agent, or Firm-Marshall J. Breen; Edward [75] Inventor: Karl Weber, Leopoldshafen, Robert Smlth Germany 57 ABSTRACT [73] Asslgnee: ESChbOm/TS A unitary molded darning and embroidery attachment FrankfurtAneet Germany for a sewing machine. A plastic clamping member 22 Filed; S 19 1974 Suitable for attachment to a sewing machine presser bar, and a plastic darning and embroidery member, [2]] Appl. No.: 507,325 including a striker arm acted on by an endwise reciprocating needle bar of a sewing machine over a por- 52 us. Cl. 112/236 tion Of its endwise reciprocation, are joined y a resil- 51 Int. Cl. D05b 29/00, D050 9/02 iem member integrally molded with the clamping [58] Field of Search 112/236, 235, 240, 60, member and daming member- The motion imparted 1 2 1 7 121 151 to adarning foot portion of the darning member by the action of the needle bar on the striker arm, which 5 References Cited is utilized to lift the darning foot from the work mate- 7 UNITED STATES PATENTS rial in order to allow the work fabric to be moved, is effectively isolated from the clamping member and the presser bar by the integrally moldled resilient member.

2 Claims, 4 Drawing Figures 1 DARNING AND EMBROIDERY ATTACHMENT BACKGROUND OF THE INVENTION SUMMARY OF THE INVENTION The invention subject of this patent is a darning and embroidery presser foot which is extremely simple, of rugged construction and low in cost due both to the material used and the method of manufacture. Major portions of the invention are formed of plastic material which are molded in one operation on the extremities of a stamped and hardened metallic spring material to form a strong, one piece attachment not readily susceptible to damage or loss of any component part.

BRIEF DESCRIPTION OF DRAWINGS For a better understanding of the invention and the advantages thereof, reference may be had to the attached specification and accompanying drawings wherein:

FIG. 1 is a side view ofa darning and embroidery foot embodying the present invention partially in section to illustrate detail,

FIG. 2 is a view in plan of the foot shown in FIG. 1,

FIG. 3 is a left side elevational view of a portion of a head of a sewing machine equipped with the darning and embroidery foot shown in FIG. I with the sewing needle shown in the down position, and

FIG. 4 is a right side elevational view of a portion of a head of a sewing machine with the sewing needle shown in the up position to indicate the effect of the position of the needle clamp on the darning and embroidery foot.

Referring to FIG. I is shown a darning and embroidery foot having a clamping member 11 of plastic material, a darning member 12 also of plastic material, joined by a curved resilient beam 13.

The darning member 12 has at the bottom end thereof a darning foot 15 having a large opening 18 therein. The darning foot 15 is joined by a ribbed plastic section 16 to a forwardly extending striker arm 17.

The clamping member 11 is molded with a flat surface 14 for abutment with the customary slabbed surface on a presser bar of family sewing machines, and a slot 19 to accommodate the screw normally used to affix a presser foot to the presser bar.

The resilient beam 13 is fashioned on one end with a right angle bend 20 and on both ends with apertures 21 designed to improve the retention of the resilient beam in the clamping member 11 and darning member 12. In addition, the resilient beam 13 is fashioned with an elongated opening 23 in order to localize bending of the resilient member to an area removed from the plastic material because of the reduced cross section of the resilient beam adjacent the elongated opening. Thus the flexing of the resilient beam 13 has little or no detrimental effect on the retention of the beam in the clamping member 11 and darning member 12.

A partial elevational view of a sewing machine is shown in FIG. 3 and in FIG. 4 in which the darning and embroidery foot 10 is shown fastened to a presser bar 25, by screw 24, adjacent a needle bar 26 carrying a sewing needle 27. In FIG. 3 the sewing needle 27 is shown in a position extending through the opening 18 in the darning foot 15 and through a needle hole 29 in a darning plate 30 of the sewing machine to cooperate with a looptaker (not shown) in. the formation of a stitch. Referring to FIG. 4, an arm 31 of a needle clamp 32 affixing the needle 27 to the needle bar 26, impinges on the striker arm 17 of the darning foot 15 when the needle bar 26 reciprocates upwardly .and the sewing needle 27 is out of the work fabric. The darning foot 15 is thereby elevated by the needle bar so that the work fabric may be moved by the artisan. The resilient beam flexes in the area of the elongated opening 24 to accommodate the relative motion between the darning member 12 and the clamping member 11.

Having thus set forth the nature of the invention, what I claim is:

l. A unitary molded darning and embroidery attachment for a sewing machine having a presser bar and an endwise reciprocating needle bar comprising:

a. a first plastic member including a plastic darning foot and means integral with said darning foot for engagement with and actuation by said needle bar of said sewing machine .over :a portion of its endwise reciprocation,

b. a second plastic member, said second plastic member having means thereon for removably securing said second member to said presser bar of said sewing machine, and

c. resilient means integrally molded with and joining said first and second plastic members whereby said first plastic member may partake of limited motion relative to said second plastic member by reason of said engagement with and actuation by said needle bar over a portion of its endwise reciprocation.

2. A unitary molded darning and embroidery attachment as claimed in claim 1 wherein said resilient means includes a metallic strip, said strip having a reduced member.

Claims

1. A unitary molded darning and embroidery attachment for a sewing machine having a presser bar and an endwise reciprocating needle bar comprising: a. a first plastic member including a plastic darning foot and means integral with said darning foot for engagement with and actuation by said needle bar of said sewing machine over a portion of its endwise reciprocation, b. a second plastic member, said second plastic member having means thereon for removably securing said second member to said presser bar of said sewing machine, and c. resilient means integrally molded with and joining said first and second plastic members whereby said first plastic member may partake of limited motion relative to said second plastic member by reason of said engagement with and actuation by said needle bar over a portion of its endwise reciprocation.

2. A unitary molded darning and embroidery attachment as claimed in claim 1 wherein said resilient means includes a metallic strip, said strip having a reduced cross section area between and spaced from said first plastic member and said second plastic member whereby flexure of said resilient metallic strip is concentrated in said reduced cross section area and away from said first plastic member and said second plastic member.