US1844743A - Sewing machine ventilating system - Google Patents

Description

1932- N. v. CHRISTENSEN 1,344,743

SEWING MACHINE VENTILATING SYSTEM Filed Nov. 20, 1928 mew/ow 1 U'N,I,Ts stares Patented Feb. 9, 1932 eren OFFEQE a g NORMAN onnrsrnnsnn, o1\ CHICAGO, ILLINOIS, ASSIGNOR To UNION SPECIAL MA- CHINE COMPANY, or QHIGAGO, ILLINOIS, A CORIORATION on ILLINOIS SEWING MACHINE 'VENTILATING SYSTEM Application filed I Tovember 20, 1928. Serial No. 320,639.

The invention relates to new and useful improvements infsewing machines and more particularly to aventilating system for sewing machines." J y his well knownthat it is desirable to house the bearingsv and actuating parts mounted therein in a sewing machine structureso as to prevent the lubriacting oil from coming in contact with thefmaterials.

An object of the invention is to provide a machine of the abovetype withmeans for directing air currents through the housing for the actuating parts, which means is so constructed as to prevent any oil thrown by the actuating parts from escaping from the housmg.

In the drawings which show by way of illustration one embodiment of the invention i Fig. 1 is a view partly in sectionand partly in front elevation showing a sewing ma chine havlng the improved ventilating system applied thereto.

Fig. 2 is a sectional View on the line 2--2 of Fig.1. 1

The invention is directed to a ventilating system for a sewing machine which includes a housing for the bearings and the actuating parts. The machine is provided with a suitable bed carrying a standard having an overhanging rocates. The main shaft in the present embodiment oi the invention is mounted in the bed and an eccentric member carried thereby operates through a link the needle lever. The bed, the standard, and overhanging arm are hollow and the eccentric member, link,

. and needle lever are all mounted within this hollow housing or frame structure fior these actuating parts. The Wall of the standard near the bed is provided with an opening which is covered by a series of louvers ar ranged so that any oil thrown against the inner faces by the actuating parts will drain back into the housing. Adjacent the upper end there is another opening which is like wise covered by a series of louvers arranged in a similar manner so that any oil thrown against these members will drain back into the housing. I

arm in which the needle bar recip Referring more in detail to the drawings, the machine as shown includes a supportin bed 1 carrying a work support 2. Mountec l on this bed is a standard 3 carrying an overhanging arm 1 having a needle head 5 at the outer end thereof. A needle bar 6 reciprocates in the head 5) and carries needles 7, 7. V

The needle bar is oscillated by a lever 8 pivoted at 9 and connected by a link 10 with a lug attached to the needle bar. Mounted in thebed 1 is the main actuating shaft 11. Said main actuating shaft is shown as provided with a crank 12. This shaft is mount ed in a bearing-sleeve 13 and also other bear-- ings carried by thebed, one of which is indicated at 14.

Cooperating with the crank 12 is a link 15 and this link 15 is connected to a ball stud at theend ofthe actuating lever 8. The bed, the standard, and the overhanging arm are all hollow and the needle lever and the actuating parts therefor are all mounted within these hollow parts.

Oil is supplied to the connection between the link and the needle lever and also the connection between the link and the crank by means ofan oil reservoir 16. A pipe 17 leading from the oil reservoir carries a wicking from which oil is supplied to the connection between the link15 and the ball stud on the end of the needle lever 8. A pipe 18 with a wicking therein leads from the reservoir and delivers oil to an opening at the upper end of the link which finds its way down through the link to the crank connection 12. This lubricating means forms no part of the present invention, but is shown, described, and claimed in the application filed by Frederick F. Zeiery filed August 2, 1928,-Serial Number 297,053. r I

Any oil working out of the parts which are lubricated and also out of thebearings for the main actuating shaft will gather at the bottom of the well in the bed, and will bekept from contactwith the material. The actuating parts being completely housed may throw oil against the inner walls of the housing, but this lubricatingoil will remain on the inside of the housing and thus the material being operated upon is protected.

lVhere all of the actuating parts are within a housing and the machine is driven at high speeds, there is a tendency, of course, for the movable parts to become heated to a certain extent. The present invention has particularly to do with means for air cooling the movable actuating parts of the machine without permitting any of the lubricating oil to escape from the housing.

To this end, the standard 3 at the front face thereof is provided with an opening 19 (see Fig. 2). This opening is covered by a frame member 20 which is secured to the outer wall of the standard by means of suitable screws 21, 21. The covering frame 20 is provided with a series of louvers 22. These louvers an preferably formed integral with the frame structure and extend horizontally across the frame structure. The inner face 23 of each louver inclines inwardly and downwardly, while the upper face 2a is substantially-horizontal. These louvers are spaced so as to provide openings leadfnginto the housing of the standard. V

At a point higher up on thestandard housing structure there is another opening 25 and this opening is covered by a frame 26 similar to the frame 20 and provided with louvers 27, the inner faces of which incline downwardly and the edges of which are substantially horizontal. This makes a series of passages extending through the wall of the housing. During the operation of the machine the link, the crank, and the lever are all vibrating at a very high speed. These vibrating parts will set up a circulation of air to a certain extent within the housing. Furthermore, the heated air rising in the housing will escape through the louvers 27 near the upper end of the housing while cool air is drawn in through the louvers 24: near the lower end of the standard or housing. The movement of the parts within the housing throws a certain amount of oil and it is possible that oil will be splashed somewhat by the crank in the bed. Any oil thrown by the actuating parts, however, against the louvers will strike the inclined faces thereof which incline downwardly and inwardly and will drain back into the housing.

It will. be apparent from the above description that I have provided a very eflicient means for air cooling the actuating parts of a sewing machine without permitting the oil thrown by the actuating parts to escape through the ventilating openings.

It will be understood, of course, that the entilating system as shown in the drawings,

- is indicated as applied to the machine at the standard and directly above the main hear ing for the actuating shaft. It may be otherwise used in sewing machines and the details Of construction of the ventilating louvers may be widely varied without departing from the spirit of the invention as set forth in the appended claims.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a sewing machine the combination of a hollow housing having actuating parts therein, said housing having openings through which cooling air currents may be passed into, through, and out of the honsing, a d f ame membe hav ng lo v r W their inner faces inclining inwardly and downwardly for covering said openings.

2. In a sewing machine, the combination of a hollow housing having actuating parts therein, said housing having an opening through which cooling air currents may pass into, through and out of the hoi sing, and louvers extending horizontally across opening and inclining inwardly and downwardly for covering the opening so as to prevent the escape of lubricating oil from the housing through the opening,

In testimony whereof, Ialfix my signature.

NORMAN V. CHRISTENSEN.

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