US2742010A - Sewing machine - Google Patents

Description

April 17, 1956 H. RABEZZANA 2,742,010

SEWING MACHINE Filed June 5, 1953 INVENTOR. flemfar 74%:224/14 III BY United States Patent 2,742,010 SEWING MACHINE Hector Rabezzana, Fenton, Mich. Application June 5, 1953, Serial No. 359,894 1 Claim. (Cl. 112-256) The present invention relates to sewing machines and more particularly to an improved sewing machine having novel and improved means for lubricating thesewing machine needle bar and needle bar bearing.

It is an object of the present invention to provide an improved sewing machine having improved needle bar and needle bar bearing lubrication means which are simple in design, inexpensive of manufacture and reliable and eflicient in operation.

A further object of the present invention is to provide improved means for lubricating a sewing machine needle bar and needle bar bearing, which means is adapted to make very efiicient use of the lubricant and which is adapted to provide a proper and adequate but not excessive lubrication of the needle bar and needle bar bearing.

Another object of the present invention is to provide such an improved means for lubricating a needle bar and needle bar hearing which prevents excess lubricant from running down the needle bar to the needle and onto the material being sewed.

Other and more detailed objects of the present invention will be apparent from a consideration of the following specification, the appended claims and the accompanying drawing wherein:

Figure l is an end elevational view of a sewing machine having parts removed and broken away and which embodies the present invention; and,

Figure 2 is a broken, enlarged sectional view of the 7 structure illustrated in Figure 1, taken substantially along the line 22 thereof.

Referring to the drawing, the sewing machine generally indicated at 10 comprises a lower frame 12 upon which is mounted an upper frame 14 which carries a needle bar 16, having a needle 18 mounted in its lower end, and a presser foot mechanism generally indicated at 20 adapted to hold the material during normal operation of the sewing machine. The upper frame 14 also carries suitable means for reciprocating the needle bar 16. This means may be of any suitable design and forms no part of the present invention and accordingly, is not illustrated herein.

The frame 14 carries a vertically disposed sleeve bearing 22 which is removably held in place by a suitable setscrew 24. The bearing 22 slidably receives the needle bar 16 for vertical reciprocatory movement therethrough. An annular member 26 encircles the needle bar 16 and is supported on the upper end of the needle bar bearing 22. This annual member 26 is formed of a suitable material adapted to absorb and be impregnated with a suitable liquid lubricant and may be of any suitable shape. In the preferred embodiment illustrated, it consists of a plurality of washers superimposed one upon 2,742,010 Patented Apr. 17, 1956 2 the other. The member 26 is also adapted to engage the outer surface of the needle bar 16 and spread a suitable layer of lubricant onto the needle bar 16 as it is reciprocated through the member 26. It will be appreciated that in the broader aspects of the present invention the member 26 may be formed of any suitable material adapted to perform these functions and in the preferred embodiment illustrated, the washers comprising the member 26 are formed of a felt material.

Liquid lubricant is supplied to the member 26 by means of a stamping 28 which is mounted on a portion of the upper frame 14 by means of a screw 30 extending through an arm portion 32 of the stamping 28. The stamping 28 also includes a generally horizontally extending portion 34 which is disposed in spaced relation above the upper end of the needle bar bearing 22 and the under side of which is disposed in engagement with the upper surface of the member 26 when the stamping 28 is secured in position by the screw 30. This generally horizontally extending portion 34 of the stamping 28 has a downwardly offset portion 36 having an aperture 38 formed centrally thereof adapted to loosely fit the needle bar 16 and permit flow of a suitable liquid lubricant downwardly through the opening 38 around the needle bar 16 and onto the member 26. It will be noted that this downwardly offset portion 36 defines a recess 40 in the upper surface of the horizontal portion 34 of the stamping 28. This recess 40 surrounds the needle bar 16 and is adapted to receive a supply of a suitable liquid lubricant which will be fed downwardly through the opening 38 onto the member 26.

While only one specific embodiment of the invention has been illustrated and described in detail herein, it will be readily appreciated by those skilled in the art that numerous modifications and changes may be made without departing from the spirit of the invention.

What is claimed is:

A sewing machine comprising a frame, a vertically disposed needle bar, a vertically disposed needle bar bearing mounted on said frame and slidably receiving said needle bar, means mounted on said frame for reciprocating said needle bar in said bearing, a plurality of annular felt Washers incircling said needle bar in engagement therewith at the upper end of said bearing and adapted to absorb and store a quantity of liquid lubricant supplied thereto, and a bracket mounted on said frame and having a horizontally disposed portion the under side of which engages the upper side of the upper of said washers to hold said washers in position at the upper end of said bearing and prevent movement of said washers with said needle bar during reciprocation of the latter, said horizontally disposed portion being provided with a recess formed in the upper surface thereof and having an aperture therethrough disposed at the bottom of said recess and adapted to loosely fit said needle bar so that liquid lubricant received in said recess is fed through said aperture around said needle bar and to said washers.

References Cited in the'file of this patent UNITED STATES PATENTS 831,874 Keith Sept. 25, 1906 1,668,976 Peet et al. May 8, 1928 1,789,202 Thompson et a1. Jan. 13, 1931 1,906,087 Parkes Apr. 25, 1933 2,047,730 Fleckenstein July 14, 1936 2,320,240 Ianiszewski May 25, 1943

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