US788363A - Driving-gear for sewing-machines. - Google Patents

Description

No. 788,363. PATBNTBD APR. 25. 1905.

M. MARGOLIN.

DRIVING GEAR FOR SEWING MACHINES.

APPLICATION FILED JAN. 5} 1905.

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NITED STATES Patented April 25, 1905.

PATENT OFFICE.

MEYER MARGOLIN, NEVV YORK, N. Y

SPECIFICATION forming part of Letters Patent No. 788,363, dated April 25, 1905.

Application filed January 5, 1905. Serial No. 239,704.

To all 11/71/0111, it may concern:

Be it known that I, MEYER MARGOLIN, a citizen of the United States,residingat New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Driving-Gears for Sewing- Machines, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

The object'of this invention is to provide improved means for driving sewing-machines, a further object being to provide improved means for driving a large number of sewingmachines secured to a table or other support, as is customary in factories of various kinds or classes, and whereby all belts and similar driving devices are dispensed with and whereby any desired part of a given number of machines may be kept in operation while the other machines are not being driven or operated, a further object being to provide an improved driving mechanism for sewing machines whereby less power is necessary to operate a given number of machines; and with these and other objects in view the invention con sists in a driving mechanism for sewing-ma chines constructed as hereinafter described and claimed.

The invention is fully disclosed in the following specification, of which the accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which Figure 1 is a sectional side viewof my improved driving mechanism for sewing-ma chines and showing a table with one machine mounted thereon and provided with the usual drive-wheel, said drive-wheel being provided with a beveled friction-gear; Fig. 2, a'partial section on the line 2 2 of Fig. 1; Fig. 3,-a plan view of one part of my improved driving mechanism, a part of the support thereof being shown in section; and Fig. 4, a similar View of that part of the driving mechanism which is connected with the sewing-machine.

In the drawings forming part of this specification I have shown at a a cross-section of a table, such as 1s usually employed in garment-making establishments where a large number of sewing-machines are employed, and placed on this table is a sewing-machine 6, provided with the usual drive-wheel b and a beveled frictional gear 6 and it will be understood that in practice a number of the machines b are or may be placed on the table a and secured thereto. The table a is provided .with any suitable framework or support,

which in the construction shown consists of upright members a and horizontal members a and a, the latter of which forms a base, and at any suitable point below the table a and below-the back portion thereof is mounted a main power-shaft 0, having large beveled frictional gear-wheels 0 only one of which is shown, and the gear-wheels in practice will correspond in number with the number of the sewing-machines Z) employed.

The table a is provided rearwardly of the machine 6 with a. bearing d, and passed through said bearing and through the table a at a downwardly and backwardly inclined angle of about forty-five degrees is a tubular casing 6, having a central box-shaped member e and yoke-shaped end brackets e and the tubular casing e. The central box-shaped member 0 and the yoke-shaped brackets e at the end thereof are all composed of two parts, as shown in Fig. 2, secured together at a in the usual or any preferred manner.

Passed longitudinally through the tubular casing e, the central box-shaped member 6 and the yoke-shaped end member 0 thereof is a supplemental drive-shaft f, composed of two parts f and f the adjacent ends of which are overlapped in the central boxshaped members 0 as shown at f* in Fig. 1 and also shown in section in Fig. 2, and as thus constructed and connected the separate parts f and f of the supplemental driveshaft f are free to move longitudinally with reference to each other. The part f? of the supplemental drive-shaftf is provided with a beveled frictional gear 9, which is adapted to operate in connection with the bevel gear wheel Z2 on the machine 6, and the part f of the supplemental drive-shaft f is provided with a bevel-gear which is designed to operate in connection with the bevel gear-wheel c on the shaft 0, and the gear-wheels g and g are preferably provided with a cover 9 of leather or similar material, and the gearwheels 6 and may be similarlyprovided, if desired.

Secured to the end of the part f of the supplemental drive-shaft f within the central box-shaped member 0 of the casing 0 is a sleeve 71,, which overlaps the slidably-connected ends of the parts f and f of the supplemental drive-shaft f and holds said ends in proper position, and mounted on the end of the sleeve h is a tubular cap-shaped rack b and a similar rack k is mounted on the part f of the supplemental drive-shaft f, and within the rack if is placed a collar If, which is secured to said part f of the supplemental drive-shaft f.

In the bottom of the box-shaped member a of the casing e are mounted two pinions or small gears 71 and j, and the pinion or gear 2' operates in connection with the rack b and the pinion or gear 1' operates in connection with the rack 7L3. In the bottom of the boX- shaped member 0 of the casing 6, adjacent to the pinion or gear 2 is a slot or opening it, and the shaft of the pinion or gear 6 is provided with a crank 76*, which passes through said slot or opening, and connected with the end of said crank is a rod 70 with which is slidably and adjustably connected a supplemental rod 70*, which is connected at 71: with a pedal is in the usual or any desired manner.

It will be understood that one of the easings and all the parts located therein or conneeted therewith is provided for each of the machines 7) and each of the wheels 0 and each of said tubular casings e is provided below the table a with a supplemental support or brace 70 of any preferred form and construction.

In the operation of my improved drivinggear for sewing-machines when the operator of a particular machine desires to proceed with his work the pedal is of his machine is depressed, and this operates the pinions or gears z and j, which are turned in opposite directions, and the separate parts f and f of the supplemental drive-shaft f are forced in opposite directions, and the gears g and g connected therewith, are forced, respectively,

or similar device for moving the separate parts f and f of the supplemental driveshaft f inwardly, and in Fig. 1 of the drawings I have shown a contractile spring m, placed between the table a and the crank k on the shaft of the pinion or gear 6, and when the foot is removed from the pedal 70 the spring m will operate to depress the crank if, as shown in dotted lines in Fig. 1, and the pinions or gears i and y' will be turned in opposite directions and so as to force the separate parts f and f of the supplemental driveshaft f inwardly, this position of said parts being shown in full lines in Fig. 1, while the operative positionsof the separate parts of the shaft f and the wheels g and g connected therewith are shown in dotted lines in said figure, and in Fig. 1 of the drawings at each end of the casing e is shown a coil-spring n, which bears against a collar 12. on each of the two portions f and f of the supplemental drive-shaftf. The said coil-springs a operate always to force the two portions of the shaft f together, and thereby remove the beveled gear-wheels on the shaft f from the beveled gear-Wheels b and 0 said beveled gear-wheels being again placed in operation by pressure on the pedal is, as will be readily understood.

From the foregoing description it will be seen that by means of my improvement I provide a driving mechanism for sewing-machines whereby one or more of a number of machines operated by a single shaft may be easily and conveniently thrown into or out of operation Whenever desired and held in operation as long as desired by simply pressing the foot on a pedal. I also provide a driving-gear of the class specified which is simple in construction and operation and which does not involve the use of belts or similar apparatus, and whileI have shown and described the gears or gearwheels 0 and b and g and g as beveled and frictional gears or gear-wheels it Will be apparent that other forms of gears orgear-wheels may be employed and various other changes in and modifications of the construction herein described may be made without departing from the spirit of my invention or sacrificing its advantages, andI reserve the right to make all such alterations in and modifications of the construction herein described as fairly come into connectlon with the gear 6 of the sewing-machine t and the corresponding gear 0 of the shaft 0, and the sewing-machine will be driven, as will be readily understood. The shaft 0 may be driven by any desired or preferred power mechanism, and it will be understood that this shaft is continually operated. When the operator of any particular machine desires to stop work, the foot is removed from the pedal k, and the pressure of the wheels g on the wheels 0 being relieved the said wheels will slightly separate, and the movement of the machine 6 will be stopped, and, if desired, I may employ aspring mental drive-shaft in opposite directions, comprising racks connected with said parts, intermeshlng gears mounted in the central pordrive-shaft outwardly, and devices for forcing said parts of the supplemental drive-shaft in- Wardly, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of the subscribing witnesses, this 3d day of January, 1905.

MEYER MARGOLIN Witnesses:

C. J. KLEIN, F. A. STEWART,

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