US2373734A - Means for cooling sewing machine needles - Google Patents

Description

A 17 1945 A. ALBERO MEANS FOR COOLING SEWING MACHINE NEEDLES lFiled Sept. l, 1942 Patented pr. 17,1945

".UNITED STATES PTENTOFFCE i MEANS Foa COOLING SEWING MACHINE NEEDLES l v :.VAndrew Albero,lDelawareGardena,N. j I 'Appleman september 1,1942, seriainaas'sv 4 claims. A(.01. i12-256) l My invention relates to anew and useful means for. coolingsewing machine needles, andhas for one of its objects toeffect the cooling operations underneath of or beyond the reverse side of the goods or work, for example, under, flush with or contiguousl the throat plate.

Another object'of this invention is to provide means to retain a cooling medium in the path of travel of a sewing machine needle and so lo- .cated as to cool said needle after it has penetrated the work.

Another object of the invention is to attach the holding means for the cooling medium to any suitable part of the sewing machine so that said cooling medium will be in the path of travel of the needle beyond the reverse side of the work.

Another object of the. invention is to attach the holding means for the cooling medium to the feed bar.

It is a well known fact that when a sewing machine needle is operated at high speed through thick, heavy or close material, considerable fric` tional heat is generated which scorches the thread so it becomes weak and. often breaks, and takes the temper out of the needle so that the latter soon becomes useless and also often breaks. When a needle breaks there Iis always the likelihood of ,it causing injury to the operator and frequent breaking of needles causes considerable loss of time since the operator must change and rethread the needles each time. Therefore an object of the present invention is to reduce the heat of the needle to a degree sufficient to eliminate the above mentioned disadvantages.

With the above and other objects in view this inventionconsists of the details of construction and combination of elements hereinafter set forth and then designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same I will describe a number of constructions in detail referring by numerals to the accompanying drawing, in which:

Fig. 1 is a view looking at the end of the bed plate of a sewing machine with portions broken away and shown in section to illustrate the relation of the needle cooling means to certain parts of the sewing machine.

Fig. 2 is a fragmentary plan view of the bed plate with the bobbin or shuttle access plate removed.

Fig. 3 is a fragmentary perspective view of the feed bar with the needle cooling means attached thereto.

Fig. 4 is a perspective view of `the aforesaid needle cooling means detached. s l

In 'carrying out' my invention/'as herein embodied, I0 represents the bedr plate of a sewing 'machine having an access opening II which is partiallyclosed at the inner end by a throat plate I2 held in pl-ace by screws I3 that permit its removal when necessary. The outer endv of said opening lII is temporarily closed by a bobbin or shuttle access plate (not shown).

The feed bar I4 is mounted under the bed plate I0 and carries the feed dog structure I5 which projects through suitable slots in the throat plate I2 for intermittently feeding the work as the feed bar is reciprocated longitudinally and oscillated vertically, as is usual. The feed dog structure is detachably mounted on the feed bar by screws I6 or equivalent fastening devices. Cooperating with the feed ldog structure is theusual presser foot 1 and the needle is designated by the numeral 8 while the rotary sewing hook is represented by the reference 9.

The needle cooling means shown in Figs. 1 to 4 inculsive, and designated as a whole by the numeral I1, comprises a bracket or bracket plate I8, Figs. 3 and 4, that may be secured to ani7 suitable part of the machine. As an example, it

is shown attached to feed bar I4, and in particular it is illustrated as clamped between said feed bar and the feed dog structure so as to be located below the top of said feed dog structure or on the reverse side of or contiguous the throat plate I2 underneath of the position of the work. The under side of the throat plate I2 may have a recess I9, Fig. l, or said throat plate can be thinner than usual to accommodate the cooling means.

'I he bracket' plate I8 carries a head 2D, preferably formed as an integral part thereof, and one portion of said head is shown as bent back upon another portion to form a holder for a piece of wick 2| or other suitable retainer for the cooling medium, such as oil, which retainer and consel quently/ the cooling medium, is in the path of travel of the needle as it reciprocates during the sewing operations. In other words, the cooling means or, more specifically, the cooling medium is in line with the needle hole through the throat plate. f

The ybracket plate is apertured to receive one or both screws of the feed dog structure. and such aperture can be a slot 22 so that said bracket plate can be slipped into place without completely removing the screws I6. In order to properly position the cooling means and also prevent wigkgling. one or two flanges 23 can be formed on adtween the time the needle contacts the cooling medium and said needle again penetrates the work. This allows the needle to further cool oi naturally by radiation in the'surrounding air.`

Of course I do not Wish to be limited to the exact details of construction herein shown and de-A scribed as these may be varied Within the scope of. the appended claims without departing from the spirit of my invention.

Having described my invention what I claim as new and useful is:

l. .The combination with a sewing machine including a feed bar and feed dog structure carried thereby, of a holding means attached to said feed bar and positioned below the top surface of said feed dog structure, and a cooling medium carried by said holding means in the path of travel of a needle, said needle contacting the cooling medium after penetrating Work.

2. A sewing machine needle cooling appliance comprising a bracket plate to be secured to the feed bar of a sewing machine, a head on said plate, a retainer fory a cooling medium carried by said head, and flanges at right angles to one another on two adjacent edges of the bracket plate.

3. A sewing machine needle cooling appliance comprising an apertured bracket plate adapted to be clamped between the feed dog and the feed bar,v a head on said plate, and a retainer for a cooling medium carried by said head and projecting across an aperture.

4. The structure in claim 3 wherein the head is formed of a section of the plate bent back upon a contiguous section thereof.

ANDREW ALBERO.

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