US2669207A - Needle-cooling air nozzle supporting means - Google Patents

Description

Feb. 16, 1954 R. HAPPE Filed May 25, 1951 WITNESS NEEDLE-COOLING AIR NOZZLE SUPPORTING MEANS INVENTOR Reynold Hap 0e Patented Feb. 16, 1954 NEEDLE-COOLING AIR NOZZLE SUPPORTING MEANS Reynold Happe, Pittstown, N. J., assignor to The Singer Manufacturing Company, Elizabeth, N. J., a corporation of New J ersey.

Application May 23, 1951, Serial No. 227,821

2 Claims. (Cl. 112-218) This invention relates to nozzles for directing high velocity jets of cooling air against the needles of sewing machines to prevent overheating of the needles and the burning of the thread incident to high needle temperatures induced by high speed sewing of heavy materials;

More particularly, this invention relates to means for adjustably supporting the air nozzles, especially multiple nozzles necessary for multiple-needle sewing machines.

It will be appreciated that many different twoneedle sewing machines are encountered having different sizes and styles of needles and set to difierent gauges and requiring diiierent application of the air jets for optimum cooling.

It is, therefore, a primary object of this invention to provide a support for twin air-nozzles which may be attached to a variety of multipleneedle sewing machines to effect selective individual shifting of the nozzles lengthwise and angularly and, in addition, to effect universal adjustment of the position of both nozzles as a unit.

With 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 prefered 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.

In the drawings:

Fig. 1 is a perspective view of part of the head and bed of a sewing machine showing attached thereto a needle-cooling air-nozzle supporting means embodying the invention.

Fig. 2 is a top plan view, partly in section, of the supporting means of Fig. 1.

Fig. 3 is a side elevation, partly in section, taken on line 3-3 of Fig. 2.

Fig. 4 is an exploded view of the supporting means of Fig. 1.

Referring to Fig. 1, there is shown the head l and bed I l of a feed-off-the-arm sewing machine of the type shown and described in the U. S. Patent No. 2,318,836, May 11, 1943, of A. B. Clayton, to which reference may be had if desired for a more complete disclosure thereof. A vertical reciprocatory needle-bar l2 operates within a bushing l3 and carries a needle clamp M which holds needles l5-l5 in spaced apart relation for double seaming. A presser-bar l 6 is arranged for vertical movement within a bushing l1 secured to the head In and carries a presser-foot I8 which cooperates with the usual of being held securely in this position.

lower feeding mechanism (not shown) to feed material through the machine and past the paths of reciprocation of the needles Iii-I 5.

Air for cooling the needles |5l5 is fed under pressure and at high velocity to nozzles l9-l9 by way of flexible tubes -40 from a source of supply which may be an air-pump driven from the power transmitter, as shown and described, for example, in the co-pending application Serial No. 134,958, filed December 24, 1949, of Reynold Happe.

It will be appreciated that the needles make a small ,target for the air jets, and the nozzles must therefore be directed with great care to efiect the maximum cooling. This requires great flexibility in positioning the nozzles but, when once positioned correctly, they should be capable AD- paratus for accomplishing these desired results will now be described. A

A tube-clamp holder 2| has a split shank embracing the presser-bar bushing l1 and is tightened thereon by taking up. on the screw 22. Formed with said holder 2i, at the end opposite the split portion, are two vertically-spaced and vertically-apertured limbs 23-23 which, together, define a receiving-pocket having a vertical axis. A stud 24 enters the apertures of said limbs 23 and is secured therein by a screw 25 which is threaded into the stud and which, when taken up, clamps the stud securely against the izzsidzeaedges of the apertured portion in the limbs The stud 24 is formed at the lower end with a flattened apertured portion 26 to which is pivotally secured an angle bracket 21 by means of a screw 28 and a circular nut 29. The bracket 21 has a generally horizontally disposed limb 30 which presents a platform for a nozzle-holding split clamp comprising jaw-like members which may be in the form of disks 3|3l placed in opposed relation and adjustably secured in that relation to said platform by means of a screw 32 and a nut 33. The stud 24 and the bracket 21 therefore constitute a support for the disks 3|.

The disks 3 l-3l are identical and each one is apertured and formed in its face proximate to the other disk with a semi-cylindrical groove 34 lying chordwise and to one side of said aperture. On the other side of said aperture and in the same face is a fiat portion 35 cut to approximately the same depth as the groove 34. It will be seen that the disks 3l--3l are placed together such that the grooved portion 34 of the face'of one disk is opposite the shallow fiat portion 35 of the face,

is clear from an examination of Fig. 2.

It will be understood that, by loosening th screw 32 relative to the nut 33,-theclamp pressure of the disks 3I3I on the nozzles I9-'|9 is relieved and said nozzles may..each be freely adjusted about and also.:lengthwise of1;its individual axis or about the vertical axis of the screw 32. This permits eachnozzle to. be oriented with the long axis of 'the'nozzl'e'moutli 36 parallel to the axis of the respective needle l5 and with the nozzle mouth directly opposite a .needle.

j .Theposition of thecommonplane Ofthe nozzles may be changed by loosening. the.v screw 28 and shifting the angleebracket 21 about the axis of-said screw. This is ofv practicalimportance in those cases where to avoidinterference, it is necessary to position the nozzles at aninclination to the bed ll. Vertical .andangularadjustment of the assembly may be readilytakencar'e of by moving th'e'clam'p i l-relative tov thebushing H.

An important feature of theconstruction according to the invention resides in thecompact, small size of thesupport which provides a mini- .mum obstruction to a clear view of the needles by the. operatorand thus facilitates the proper guiding of the work. This is attributed to the special shape of the clampingr'surfaces of the disks 3I.3l wherein a semi-cylindrical groove .on one disk cooperates .with an undercut fiat portion on an opposed disk to .adjustably retain a cylindrical nozzle therebetween.

. Having thus set forth the nature of the inven- Ii/i011, what .I claim herein is:

1. A clamp for 'adjustablyholding a plurality of air-nozzle tubes for use in connection with sewing machines, comprising, complemental opposed centrally-apertured disks having their proximate side faces each provided with a flat wall and a tube-receiving groove disposed at opposite sides of the apertures of said disks, said disks being arrangedvwith the groove of each disk opposed toth'e flatu-wall of the other disk to permit relative rotation between said disks, and

.*a pivot-bolt passing through the disk apertures for removably securing said disks together in "-'.'tube:- clamping relationship after such rotation.

2. An adjustable support for holding cooling- "rair nozzles inthe proper position relative to the lie'needles; of -a"-. rmultiple-needle sewing machine,

.iicomprising iaistud adapted to be secured to the .sewing machine in the vicinity of the needles,

an angle-bracket adjustably secured to said stud .aan'dipresenting a generally horizontal platform,

a nozzle-clamp comprising two separable disk elementsremovablysecured together and to said platform by-a common fastening, each disk element having in one of its-faces, a flat-bottomed .and a round-bottomed groove, said disk elements ;being:positionedin face-to-facerielation so that the cooling-air nozzles-are eachclamped, after relativeadjustment, between around-bottomed and a fiat-bottomedegroove in opposite faces of -said diskoelements.

C ".REYNOLD HAPPE.

" "Referencesflit'ed in the file of this patent "UNITED STATES PATENTS Number '6 Name Date 526,123 Boots et a1 Sept; 18, 1894 544,501 Buffinton 'Aug. 13, 1895 1,074,272 Kline Sept. 30,1913

1,227,258 Godley May 22,1917

. 1,732,670 'Wilmore Oct. 22, 1929 2,080,322 Vesconte May 11, 1937

Images