US1293806A - Sewing-machine. - Google Patents

Description

J. KORNAS SEWING MACHINE,

"APPLICATION FILED JULY 1, I916.

Patented Feb. 11, 1919.

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J. KORNAS.

SEWING MACHINE.

APPLICATION FILED 1UL'Y1,19!6.

Patented Feb. 11, 1919.

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J. KORNAS.

SEWING MACHINE.v

APPLICATION FiLED1ULYI,l916.

1,293,806., Patented Feb. 11, 1919.

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JOSEPH KOBN'AS, 0F LINDEN, JERSEY, ASSIGNOR T0 FELDMAN MACHINE WORKS,

INC., A CORPORATION OF NEW YORK.

SEWING-MACHINE.

Application filed July 1. 1916.

To all whom it may concern Be it known that I, JosnPH KoRNAs, a citizen of the United States, and resident of Linden, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification.

My invention relates in general to a sewing machine of the class usually used in factory work and particularly relates to the frame and coacting parts of such machines.

It is a usual practice in factory work to have the different sewing machines constructed with work supporting plates designed to fit the particular kind of work upon which it is desired to operate. This practice, of course, necessitates a separate machine or group of machines for each character of work performed and with the known types of such machines there is but little possibility of adapting all of the machines for their most effective operation thus resulting in some of the machines remaining idle for part of the time.

Accordingly one of the objects of my invention is to provide a single standard type of sewing machine frame designed to accommodate different characters of work supporting plates, so that one form of machine inay be utilized to operate economically upon the different characters of work performed by the factory. This object may be obtained merely by providing a standard form of plate supporting bed to the machines together with a set of the different characters of work supporting plates usually employed in devices of this character, each plate designed to fit the standardized bed.

Another object of the invention is to design a sewing machine frame, so that the space surrounding the work supporting plate or its bed, shall be substantially free from any projecting parts of the machine, thus insuring the maximum possible work space beneath the arc or arm, between the machine head and arm-supporting-standard and in advance of and in rear of the work supporting plate or bed.

Incidental to this last mentioned object it is an incidental desideratum to provide a simple form of machine with the actuating mechanism in compact form and mounted to work as close as possible to the work supporting plate or bed and further to mount Specification of Letters Patent. Patented Feb. 11, 1919.

Serial No. 106.991.

all gages and auxiliary parts so that the space about the work supporting plate may be substantially maintained clear of any obstruction to the movement of the material being sewed.

Still another object of the invention is to provide a construction which will insure a secure support for the different work supporting plates when positioned on the bed and a final object is to provide a simple, compact and inexpensive form of machine of the class described with the least possible number of additional parts or extra machine Work necessary to accomplish the objects suggested.

Various other objects and'advantages of the invention will be in part obvious from an inspection of the accompanying drawings and in part will be more fully set forth in the following particular description of one form of mechanism embodying my invention, and the invention also consists in certain new and novel features of construction and combination of parts hereinafter set forth and claimed.

In the drawings:

Figure 1 is a view in horizontal section through the upper frame of the machine and showing the lower portion of the machine designed to illustrate a preferred embodiment of my invention;

Fig. 2 is a front elevational view of the device shown in Fig. 1;

Figs. 3 and 4 are respectively a plan and a front elevational view of one form of work supporting plate and plate carrying parts shown fragmentarily;

Fig. 5 is an end elevational view looking at the left side of the machine shown in Figs. 1 and 2;

Fig. 6 is a plan view of another form of.

work supporting plate;

Fig. 7 is a transverse sectional view taken on the line 77 of Fig. 6;

Fig. 8 is a perspective view of the supple mental prop shown detached from the manames for convenienceof expression but they are intended to be as generic in their application to similar parts as the art will permit.

In the several figures, there is shown a sup.- porting base 12, extending upwardly from one side of which is a standard 13 designed to support a head 14 by means of the usual arch arm (not shown). The head carries a presser foot bar 15 and needle bar 16 actuating the needle 17. A work plate supporting bed 18 projects upwardly from the base l2c0nstitut1ng,an extension thereof and supports the feeder mechanism 19. The shuttle 19 of this mechanism is actuated by an ec: centric feeding shaftQO journaled in the bed 18 and in the base 12.and driven from a hand or pulley wheel 21, all as is usual with devices of this character. The feeding mechanism 19, is operated by a conventional form of feeder actuating mechanism 2 2, including a known form 'of T-shaped feeder bar 23, but in this disclosuredesigned so that one arm 24 extends rearward'ly of the bed plate and is pivoted to a rocking frame 25 positioned back of the standard 13 and the other arm 26 of which extends parallel to the length of the machine and relatively close to the bed so to permit a free work space about the bed 18 unobstructed by the feeder bar mechamenu as sual with known forms of such evi One or more locating studs 28 project upwardly from the flat surface 27 of the bed and this fiat surface contains one or more screw ho'les 29. Preferably this fiat surface is of relatively small dimensions in plan, but if desired, the bed may be provided with an extension 30 for the purpose of providing an additional plate supporting area to the bed. This .bed is designed to receive any one of a series of work supporting plates, one-of which, known as a cloth plate 31., is shown in Fig. 6. This type of plate is relatively wide extending in all directions in plan from the sewing mechanism and particularly' designed to support the fiat work fed to the sewing mechanism. Another form of plate identified a throat plate 82, two modificationsof whichare shown in Figs. 3, 4, 5, 10 and 11, is particularly designed to be used inconnection with round work such as hats. This type of plate is substantially U-Shape in-cBQSS-Section and fits over the bed, as shown more particularly in Fig. 5,. This plate hasa material dimension lengthwise of the, machine preferably so as to reach from, the upright standard to a position well beyond the feeding mechanism, as shown in Fig. 4. This type of plate gives a relatively longcurved working surface well ,known in some types of sewing machines. Plates of this character are usually equipped with some .form of ,gage, one vtype of which is identifiedas a'lininggage 83and is adjustably mounted thereon and set in position by a set screw 34. These work supporting plates may contain an opening 35 located to have the feeding mechanism project therethrough when in set position on the bed and may also contain a needle opening 36 designed to receive the needle on its down stroke. The two last named openings may be contained in a replaceable needle plate 38 (Fig. 6) as is usual with some form of plates of this character. The plates also contain stud apertures 39 designed to contain the studs 28 and also contain screw holes 40 designed'to register with the corresponding screw holes in the stud plate and coactively designed to receive screws 41 for fastening the work supporting plate in its set operative position on the bed. The plates may also be provided with oil vents 42.

With some types of plates, aS for instance, with the broad flat plate shown in Fig. 6, it is desirable, not necessary, tosupport the same at points remote from the support provided by the relatively small bed and for this purpose the device illustrated is provided with a supplemental prop 43 designed to be moved from an inoperative position, such as that shown in Figs. 1 and 2, into an operative position engaging the underside of the plate as shown in Figs; 7 and 9. In the form disclosed the prop is a wide U-bar, the crotch portion 44 of which is pivotally mounted in the bed and extends transversely of the length-of the machine so as to position the arms 45 some material distance from the bed. These arms are designed to be rocked into raised position to support the plate by engaging the underside thereof. If desired, the arms may be demountably fastened to the plate and for this purpose the plate is provided with screw holes 46 and the ends of the arms are countersunk and tapped to receive screws 47 inserted from the top of the plate through the screw holes into the tapped ends of the arms.

By means of a construction of this kind the broad plate may be supported adjacent its center by the bed and the wide spreading arms may be caused to engage the plate at points remote from the support provided by the bed, thus insuring a. well braced work support free from any rattle or abnormal torsional strains thereon caused by pressure on the plate adjacent its edges. The prop may be secured in its operative, supporting position, or in its inoperative position moved out of the way, and for this purposea spring 48 is fastened to the underside of the bed plate and is caused to bear upon one or the other of flat faces 49 or 50 formed at an angle to each other in the crotch 44 for the purpose of holding the arms securely in the position shown in full line or in the position shown in'dotted lines in Fig. 9.

The throat forms of work supporting plates are frequently provided with movable types of set guides and gages, two forms of which are shown in Figs. 10 and 11. These figures illustrate one form of edge guide 51 and a common form of braid gage 52. The braid gage illustrated includes a rack 53, which in the device illustrated, is designed to mesh with a pinion 54: journaled in the bed plate and arranged to be actuated manually when in operative engagement with the braid gage.

This pinion and any actuatin mechanism for the same, may be mounte upon the frame of the machine as a permanent fixture thereto and the different gages used on the supporting plate, or used as separate attachments to the machine, may be standardized so that their movable elements may all be actuated from this pinion carried by the frame.

It will be seen that another feature of this disclosure is to provide a standard form of gage actuating mechanism as a permanent part of the machine proper and to arrange the different gages so that they may fit on the machine and be actuated all from the same actuating mechanism.

A work gage 55 in the form of an L-rod has a long reaching longitudinally extending stem portion56 slidably mounted in a bracket 57 extending rearwardly from the standard 13 and the gage is fastened in position by a thumb-screw 58 threaded through the bracket and having a working head 59 accessible from the-front of the machine.

This long gage includes a transversely disposed work engaging finger 60 fixed to the forward end of the stem and arranged to engage the work in order to hold the same in position on the work supporting plate and in position to be engaged by the sewin mechanism. Supporting this gage in the standard at one side of the work space permits of a construction whereby the gage may be readily moved into inoperative position thus permitting the free unrestricted space about the work supporting plate or bed characterizing the device disclosed.

In operation it is to be understood that this machine works in a manner similar to known machines now on the market, except that for the different character of work to be sewed, the difierent plates now known may be inserted on the bed plate which in this form of machine is designed toaccommodate these different characters of plates. By loosening and removing the holding screws the plate in position on the bed may be lifted clear of the studs and another plate may be inserted in place of the removed plate. By resetting the screws in their positions in the alined screw holes, the new plate is securely fastened in position with the feeder opening in proper position uncovering the feeding mechanism and with the needle opening 36 in position to receive the needle on its down stroke.

If the character of plate used requires supplemental supports, the prop may be swung from its inoperative position into position engaging the underside of the plate and if desired, this support may be fastened in fixed supporting position. Should a type of plate be used provided with a rack form of setting gage, the rack will be caused to mesh with the actuating pinion and a type of sewing machine will be formed which utilizes this feeding rack form of gage.

In those cases where the long gage is not needed, it may be grasped with one hand while the set screw is loosened with the other at the front of the standard and the gage slid in its bracket into an inoperative position or it may be demounted entirely from the machine in each case insuring a clear unobstructed space beneath the arms for bulky work fed to the sewing mechanism.

It is obvious that by means of a device of this character a simple form 'of machine is provided which will give its maximum available amount of work space without interruption by any of the actuating mechanism or by the gages commonly found in devices of this character. As any number of work supporting plates may be designed and arranged to be supported from the bed disclosed, it is obvious that as many different machines may be formed as there are different work supporting plates available so that the one standard form of machine may be utilized to construct different types of sewing machines.

While I have shown and described, and; have pointed out in the annexed claims, certain novel features of my invention, it'will be understood that various omissions, substitutions and changes in the form and details of the device illustrated andin its operation may be made by those skilled in the art without departing from the spirit of the invention.

Having fully described my invention, I claim:

' 1. In a sewing machine, the combination with a supporting base and a sewing needle, a plate bed projecting from said base and provided with a setting stud and with a screw hole in the face thereof and adapted to receive one of a plurality of work supporting plates of different characters, provided with a needle receiving opening, with a screw hole designed when the plate is mounted in position on the base to register with the screw hole in the base and also provided with an aperture designed to contain the setting stud, said screw holes and said stud and coacting aperture designed to locate the plate in set position relative to the needle and its needle receiving opening.

2..In a sewing. machine, the combination of a supporting base, a feeder actuating mechanism including an arm positioned close to the base, a relatively small plate bed projecting forwardly from said baseto provide a support for a work plate with an unobstructed space about the same and to the outside of the mechanism arm for the material to be sewed, said plate bed provided with means for demountably attaching a work supporting plate to said bed and a work supporting plate adapted to be positioned on said bed and designed to extend into said unobstructedspace about the bed and' overlapping said mechanism arm.

3. In a sewing machine, a supporting base, a relatively small plate bed projecting forwardly from said base to provide a support for a materially larger work plate with an unobstructed space about the same for the material to be sewed, said plate bed provided with means for demountably attaching a work supporting plate to said bed.

4. In a sewing machine, the combination with a sewing needle, a horizontally disposed plate bed, said bed provided with means for locating a work plate in set position thereon relative to the needle, said bed provided with a small extension for providing an additional plate supporting area, said extension provided with a screw hole, of a Work plate designed to be positioned on said bed and provided with means designed to coact with the correlated means on the bed and the screw hole in the extension for fastening the plate in position.

5. In a sewing machine, the combination with a sewing needle and a supporting base, said base having a plate bed extending therefrom and positioned adjacent the needle, said bed provided with means for setting a work supporting plate in position relative to the needle, and a supporting prop carried by the base and designed to be moved from an inoperative position into position to provide a supplemental support for certain types of work supporting plates carried by the bed.

6. In a sewing machine, the combination with a sewing needle and a supporting base, said base having a plate bed extending therefrom and positioned adjacent the needle, said bed provided with means for setting a work supporting plate in position relative to the needle, a supporting prop carried by the base and designed to be moved from an. inoperative position into position to provide a supplemental support for certain types of work supporting plates carried by the bed and means acting on said prop for holding the same in-its operative position.

7. In a sewing machine, the combination with a sewing needle and a supporting base, said base having a plate bed extending therefrom and positioned adjacent the needle,

said bed provided with means for setting a work supporting plate in positionrelat-ivc to the needle, a U-shaped prop pivoted at its crotch in said base and designed to have its free ends swing up into position to engage the underside of the work supporting plate thereby to support the same at points spaced from the part supported-by the bed.

8. In a sewing machine, means for supporting a Work supporting plate in set position relative to the sewing needle, said means including a plate bed designed to support a plate in position thereon and supplemental supporting means designed to be moved from an inoperative position into a set position to support a plate positioned on the bed.

9. In a sewing machine, a frame including a supporting base and a standard projecting upward from the base, a relatively long narrow bed extending to one side of said base, feeding mechanism carried by the bed adjacent its free end, actuating mechanism having a portion thereof extending from a position in rear of the upright, parallel to the bed and relatively close thereto for actuating the feeding mechanism, said close positioning of the actuating mechanism to the bed providing a free work space about the bed with the least possible interference from the actuating mechanism and a work supporting plate designed to be mounted on the bed to cover the portion of the actuating mechanism adjacent the feeding mechanism.

10. In a sewing machine, a frame including a supporting base having-a plate bed extending therefrom and designed to carry a work supporting plate provided with movable gage mechanism, a manually actuated mechanism carried by the frame as a permanent fixture thereof, and designed to be operatively connected to the gage mechanism carried by the work supporting plate.

11. In a sewing machine, a frame including a supporting base carrying a plate bed, 110 a work supporting plate demountably positioned on said plate bed, a gage for controlling the work material, a manually controlled mechanism carried by the frame as a permanent fixture. thereof, said mechanism 115 designed to be operatively connected to the gage for shifting the same into its several operative positions.

12. In a sewing machine, a frame including a supporting base carrying a .plate bed, 120 a work supporting plate demountably positioned onsaid plate bed, a gage for controlling the work material, said gage including a rack, a pinion mounted in said frame as a permanent part thereof and de- 125 signed, when the plate is in operative position, to mesh with said rack and means for actuating said pinion to move the gage.

13. In a sewing machine a frame including a supporting base carrying a plate bed, 130

a Work supporting plate demountably positioned on said plate bed, a gage for controlling the Work material carried by the demountable plate, said gage including a rack, a pinion mounted in said frame as a permanent part thereof and designed, When the plate is in operative position, to mesh with said rack and means for actuating said pinion to move the gage.

Signed at New York, in the county of 10 New York and State of New York, this 19th day of June, A. D. 1916.

JOSEPH KORNAS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, D. 0.

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