US1549328A - Thread-deflector mechanism - Google Patents

Description

Aug. 11, 1925.

1,549,328 RMIPLUMLEY THREAD DEFLECTOR MECHANISM Filed Aug. 2, 1925 Patented fitug. 11, 1925.

UNITED ST ATES.

intents Parnu-'r orifice.

RAYMOND L. PLUMLEY, F BROOKLYN, YORK, ASSIGNOR 'O` FREDERICK OSA-NN COMPANY, OF NEW YORK, N. Y., A CORPORATON OF NEW YORK.

THREADeDEFLECTOR IVIECHANISM;

Application filed Augusta, 1923.

To all whom may concern Be itv known that 1, RAYMOND L. PLUM- LEY, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New` York, have invented new and useful mprovements in ThreadDeflector Mechanism, of which the followingV is a specification.

rhis invention relates to-mechanism particularly intended for use with single thread sewing machines for engaging and deflecting the loop of thread from the needle as presented to the looper so that successive passes of the needle may cause stitches to be formed. Vilhile in many respects not limited to such use, the mechanism of this invention has been particularly designed for button sewing machines of that type disclosed in the application for patent filedby Robert L. Lyons, Serial No. 633,625 for button sewing machine. The thread deflector is movable parallel to the looper shaft into and out of position to engage the loop and when in loop-engaging position is movable'laterally of the shaft, both motions being effected by a double cam carried by the looper shaft.

rThe present invention further comprises a novel construction of one of the followers for the cam, and other details of construction as will later appear.

For a more complete understanding of this invention reference may be had to the accompanying drawings in which Figure 1 is a fragmentary vertical section through a button sewing machine containing the mechanism of this invention, the section being parallel to the looper shaft.

Figure 2 isa transverse section on line 2 2 of Figure 1.

Figure 3 is an inverted plan of. a portion of the mechanism detached.

Figures 4 and 5 are detail sections onlines and 5 5, respectively, ofV Figure 3.

Referring to these figures, 1 indicates` a portion ofthe worlr. carrying frame arm of the machine having a work plate 2 on its upper face on which the cloth is supported and in Figure 1 is also shown a button clamp 3 and a needle bar 4 carrying the needle 5. The needle is adapted to be given its sewing and retracting strokes through an opening 6 in the worlr plate and the upper face of the frame arm into cooperative relation to a looper 7 of any suitable description which is xed at the end of a looper shaft 8.

Serial No. 655,280.

This looper shaft is journaled adjacent the l'ooper in a bearing partition 9, extending laterally of the arm 1, and has fixedthereto rearwardly of this bearing a cam block 10 for actuating the thread deflector finger.

Supported above this block 10 is a plate 12 having a gu-ideway 13 cut in its under face, this guideway extending longitudinally of the plate and of the frame arm 1. As shown more clearly in Figure 2 this plateis supported on the upper face ofthe arm 1, the work plate 2 overlying it, the guideway 13 being downwardly disposed. Reciprocable in this guideway is a plate member 14, which is held in position therein by a strip 15 engaging under one marginal-edge thereof, and a pair of strips 16 and 17, which bridge the guideway 13 adjacent opposite ends. The slide plate 14 is laterally extended at one side, as shown at 18, this extension riding ina recess 19 in the plate 12, this recess forming in eifect a continua: tion laterally of the guideway 13.r Pivoted at one end on this extension 18 on a pivot screw 2O is the loop deflector linger 21. This dei'iector finger projects between the guide strip 17 and the lower face of the plate 12, this guide strip being cut away for a por tion of its length to provide a passage 22 within which the deflector finger rides, this guideway permittingthe finger to have a limited pivotal movement about the screw 20. The slide 14 has depending therefrom a post 23 serving as a cam follower and riding in a cam groove 24 in the cam block 10. r:his groove is formed in the periphery of the cani block so that. the cam positively controls the lengthwise'position of the member 14 and slides it in the guideway 13properly timed with relation to the rotation of the looper. The deflector finger 21: has depending therefrom a cam follower post which isadapted to ride against the sideiof anelongated cam hub 31. on' the camblock 10. The elongation of this` cam portion is for the purpose of insuring actuation of the follower thereby in all lengthwise positions of the slide 14. This hub portion 31 acts to move the thread nger positively in one direction only, it being necessary to hold the follower up aga-inst the cam in order to control its position. As shown this is accomplished by means of a spring wire 32 slidably engaging the opposite side of the follower 30 from the hub 31, this wire as wus-...wg

shown being coiled about one of the fastener screws 83 employed to retain the bridge strip 16 in position and the opposite end of this spring wire is shown as attached to the screw fastening 84 by which the opposite end of the strip 16 is made fast. This spring wire, therefore, urges the deflector finger toward one limit of its pivotal motion, which is substantially in line with the slide 14, while the cam4 hub 31 at the proper time imparts lateral motion thereto in the other direct-ion.

The cam follower 30 is of considerable length and in order that it may be properly i fixed to the finger 2l and yet present a hardened surface to contact with the hub 31, the construction best illustrated in Figure 5 is provided. Referring to this figure it will be seen that the follower 30 comprises a hardened bushing or sleeve 40 through which passes a'relatively soft rivet member il having a head 42 at its outer end seated in an enlarged portion of the bore of the sleeve 4i() and 'having its other end passed through a perforation in the finger 2l and headed over as shown at 48.

Having thus described an embodiment of this invention it should be evident that various changes and modifications might be made therein without departing from its spirit or scope as defined by the appended claims.

I claim:

l. In combination with a looper shaft having a looper thereon, of a member reciprocable parallel to said shaft, a deflector finger pivoted to said member, a cam block having a pair of cam portions carried by said shaft, a follower for one of said portions carried by said member, and a follower for the other of said portions carried by said finger.

2. In combination with a looper shaft having a looper thereon, of a member reciprocable parallel to said shaft, a deflector finger pivoted to said member, acam bloclr having a pair of cam portions carried by said shaft, a follower for one of said portions carried by said member, a follower for the other of said portions carried by said finger, and a spring for urging said finger toward one limit ofits pivotal motion.

3. A mechanism of the class describedy comprising a plate having a guideway therein, a member slidable in said guideway, a

defiector finger pivoted to said member, a post depending from said member by which it may be slid in said guideway, and a post depending from said finger by which it may be swung laterally .of `said member.

t. A mechanism of the class described comprising a plate having a guideway in one face thereof, strips bridging said guidcway adjacent opposite ends, a member slidable in said guideway and held in position by said strips, a defiector finger pivoted at one end to said member and having a limited swinging movement between said plate and one of said strips, a cam follower projecting from said finger and by which it may be swung, and a spring fixed at one end to one of said bridge strips and engaging said follower for urging said finger to one limit of its swinging motion.

5. A mechanism of the class described comprising a plate having a guideway in one face thereof, strips bridging said guideway adjacent opposite ends, a member slidable in said guidewayand held in position by said strips, a defiector finger pivoted at one end to said member and having a limited swinging movement between said plate and one of said strips, a cam follower projecting from said finger and by which it may be swung, and a cam follower carried by said member and by which it may be reciprocated.

6. A mechanism of the class described comprising a plate having a guideway `in one face thereof, strips bridging said guideway, means at opposite ends of one of said strips for fastening it to said plate, a member slidable in said guideway and held in position by said strips, a deflector finger pivoted at one end to said member and having a lim ited swinging movement between said plate and one of said bridge strips, a cam follower projecting from said member and by which said member may be reciprocated, a cam follower projecting from said finger and by which said finger may be swung, and a spring wire made fast to one of said strip fastening means, coiled about another strip fastening means and engaging one side of said finger cam follower for urging said finger toward one limit of its swinging movement.

In testimony whereof I have affixed my signature.

RAYMOND L. PLUMLEY.

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