US2525034A

US2525034A - Needle threader

Info

Publication number: US2525034A
Application number: US729162A
Authority: US
Inventors: John N Jamo
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-02-17
Filing date: 1947-02-17
Publication date: 1950-10-10
Anticipated expiration: 1967-10-10

Description

Oct. 10, 1950 J, JAMQ 2,525,034

NEEDLE THREADER Filed Feb. 17, 1947 Jahn M Jamo Stream;

Patented Oct. 10,

The present invention relates to needlethreaders'" and'more particularly to a device for threading the needles of sewing machines, and this application is a continuation-impart of mycopending application Serial No. 601,506, filed June I 25, 1945, now matured into Patent No. 2,476,872, dated July 19, 1949.

The primary objects of the invention are to provide a needle threader having a manually operable plungerfor engaging a thread and passing the same through the eye of a needle; to provide such a needle'threader having means for mechanically positioning the plunger opposite the eye ofthe needle with a thread .therebetween thus reducing V eyestrain and time lost in positioning the device by eye; to provide such a needle threader composed of-partswhich can be economically made and assembled; to provide such a needle threader havingan improved plunger for positively, engaging the thread to': pass the same through the needles eye.

An illustrative embodiment of the invention is shown in the accompanying drawing, wherein: I

Figure 1 is a fragmentary perspective viewofcertain parts of a sewing machine with my new;

cluding the needles eye, thread, and the end of the plunger of the device in position for threading the needle, the section being taken on lines 44 of Figures 5 and 6;

Figure 5 is a horizontal sectional view of the same taken on lines 55 of Figures 4 and 6; and Figure 6' is a fragmentary front elevational view of the lower end of a needle including the a claims. (ci ia-225) needles eye, thread, and the plunger of the device in position for threading the needle.

Referring now in detail to 'these drawings wherein like parts are designated by the same numerals in the several views, the needle threader there shown has an elongated body comprising complementary body "members I and [I having.

ends thereof. Adjoining, complementary recesses in the body members l0 and l 1 form a horizontal cylindrical plunger bore l5, a vertical thread seat IS, a vertical needle seat I'l adjacent the thread seat, l6 and conforming to the shapeof a needle,

and a rectangular stop seat 18 which intersects the" plunger boremedially thereof and at righti:..angles thereto. I V '1,

A plunger l9 isreciprocally mounted in the plunger bore I5 of the body, said plunger having a reduced forward end portion 20 extending through a'reduced forward end portion 2| of the plunger bore, said end portions of the plunger and the bore being rectangular in cross-section and being vertically elongated to substantially correspond with the shape-ofa needles eye. The upper side of the plunger is cut away along a portion thereof to form a channel 22 having shoulders-23' and 24 at its opposite ends adapted to contact, a stop 25 which is disposed in the stop .[seat LI and which extends into thelchannel n thus to limit the reciprocating movements of the plunger 19.

The rearward end portion of the plunger I9 extends to the exterior of the body and is pro- .vided with a head 26 on the extremity thereof.

A coiled compression spring 21 circumscribes the rearward end portion of the plunger 19 and is interposed between the plungers head 26 and the body of the device, and said spring serves to normally urge the plunger in a rearwardly direction awayfrom the thread seat I6 so that the reduced forward end portion 20 of the plunger normally lies rearwardly of said thread seat.

The needle threader is adapted to be applied to a sewing machine 28-shown fragmentarily in Figure 1 which has a clamp 29 for retaining the upper end of a needle 30 in such a manner that the measured distance from the clamp 29 to the needles eye 3| is constant. The measured distance from the plunger l9 to the top of the body of theneedle threader is equal to said distance from the clamp 29 to the needles eye 3|, and the threader may by this vmeans be mechanically positioned with the needles eye in alignment with the plunger and with a thread 32 positioned therebetween in the thread seat IS.

The forward extremity of the plungers reduced end portion 20 is bifurcated as best illustrated in Figures 4, 5 and 6. One prong 33 of the bifurcation extends in an upwardly and outwardly direction while the other prong 34 of the bifurcation extends in a downwardly and oppositely outwardly direction. The plungers extremity is thus positively adapted to engage the thread 32 and to pass the thread through the otherwise mounted on a sewing machine and thus incorporated in such machines at the time of their manufacture. While but one specific embodiment of the invention has been herein shown and described, it will be understood that the deq vice may be modified without departing from the spirit of the invention as the same is defined by the following claims,

Iclaim:

1. In a needle threader, a body having a horizontal plunger bore, a vertical thread seat, and a vertical needle seat for seating a needle with the eye thereof in alignment with said plunger bore with a thread therebetween, and a plunger reciprocally mounted in the plunger bore and having an end portion adapted to engage said thread and pass the same through the needles eye, said end portion of the plunger being bifurcated to form a thread-engaging notch, one prong of the bifurcation extendin in an upwardly and outwardly direction, and the other prong of said bifurcation extending in a downwardly and oppositely outwardly direction.

2. In a needle threader, in combination with :a needle having an eye near the point and a clamp for retaining the other end of the needle :and maintaining said needle in a vertical position pointing downward, a body having a horizontal plunger bore, a vertical needle seat, and a vertical thread seat adjacent the needle seat and extending between the needle seat and said plunger bore, measured stop means on the body adapted to engage said clamp for aligning the ,emi l.

needles eye with the plunger bore and with a thread in the thread seat, and a plunger reciprocally mounted in the plunger bore and having an end portion adapted to engage said thread and pass the same through the needles eye, said end portion of the plunger being bifurcated to form a thread-engaging notch, one prong of the bifurcation extending in an upwardly and outwardly direction, and the other prong of said bifurcation extending in a, downwardly and oppositely outwardly direction. i

3. In a needle threader, a body having a horizontal plunger bore, a vertical thread seat, and

a vertical needle seat for seating a needle with the eye thereof in alignment with said plunger bore and with a thread therebetween, and a plunger reciprocally mounted in the plunger bore and having an end portion adapted to engage said thread and pass the same through the needles eye, said end portion of the plunger havingpa greater vertical dimension than horizontal dimension and bein bifurcated to form vertically spaced prongs, said prongs being oppositely later ally bent to engage therebetween a vertical thread.

' JOHN N. JAMO:

REFERENCES CITED 7 The following references are of record, in the file of this patent:

UNITED STATES PATENTS Switzerland 'June 29, 1896