US757629A - Sewing-machine motor. - Google Patents

Description

No. 757,629. PATENTED APR. 19, 1904. J. H. moon, JR-

SEWING MACHINE MOTOR.

APPLIGATION FILED D30. 24, 1902.

- 2 SHEETS-SHEET 1.

H0 MODEL.

PAI'VENTED APR.19, 1904.

J. H. MACON, J5.

SEWING MAGHINE MOTOR.

uruoumn mum DEC. 24, 1902. v

K0 MODEL. 2 SHEETS-SHEET 2.

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JACOB H. MACON, JR,

Patented April 19, 1904.

PATENT FFICE.

OF TAMPA, FLORIDA.

S EWINGw-I VIACH INE MOTOR.

srncrricngrron forming part of Letters Patent No. 757,629, dated April 19, 1904. i -Application filed December 24-, 1902. Serial No. 136,488. (No model.)

To all whom it may concern I I i 1 Be it known that I, J ACOB HJMAcoN, Jr., a

citizenof the United States, residing at Tampa,

in the county of Hillsboro and-State of Florida, have invented a new and useful Sewing-Machine Motor, ofwhich the following is a speci-,

besirnple and efficient. A V

i With these ends in view the invention consists in the improved construction and arrangement of parts, which will be hereinafter fully described, and particularly, pointed out in the claim.

In the accompanying drawings, Figure 1 is a top plan view showing my invention applied to the table of an ordinary sewing-machine. Fig. 2 is a vertical sectional view taken on the line 22 in Fig. 1. Fig. the a sectional view on a larger scale, taken on the line 3 3 in Fig. 1. Fig- 4 is a top plan view illustrating a slight modification. Fig. 5 is a detail sectional view taken on the line 5 5 in Fig. 2. Fig. 6 is a detail S8Ct10I1fl,l V1BW taken on the line 6 6 in Fig.4.

Corresponding parts in the several views are indicated by similar numerals of reference.

1 designates the table of an ordinary sewing-machine, of which 2 designates a part of the frame, and 3 the balance-wheel, which is constructed with the usual grooved pulley 4L, which is disposed in alinement with the slot 5 in the table, through which a belt or band is usually extended to connect the said pulley 4 with the drive-wheel, ordinarily run by footpower and which has not been shown in the drawings. 7

6 designates a table or platform having an "extension forming a bracket 7 which is supported upon a corner of the table 1,(or, if preferred, against the under side of the latter, as indicated in Fig. 4 of the drawings,) it being secured in operative position by means of a pair of clamping-screws 8, which admit of 'its being very quickly and conveniently applied or detached, as may be required. The table or platform 6 supports an electric motor, :which has been conventionally indicated at 9 and which may be of any desired pattern, the shaft 10 of said motor being ex tended to one side, as shown. Said shaft carries a fixed clutch member consisting of a friction cone-pulley 11 and a loose sliding clutch member consisting of a cylinder 12, having at one end a conical recess 13 to engage the said cone-pulley. The said clutch member 12 has an annular groove 14 in approximate alinement with the pulley L of the sewing-machine. It also hasan annular groove -15,in which is revolubly seated a band 16, provided with diametrically opposite pins 17, whereby it is loosely connected with the forked end of a, lever 18, the prongs of which are provided with slots l-9,engaging the said pins. The lever 18, which constitutes the shifting-lever, is mounted pivotally upon the base or table 6 of the motor,

as shown at 20, and the said lever may be extended .rearwardly under the balance-wheel of the machine, as shown in Figs. 1 and 2 of the drawings, sothat the handle thereof shall be conveniently accessible to the operator. In the event of the balance-wheel being too close to the table of the machine to admit of the shifting-lever being conveniently located underneath the same the said shifting-lever may be curved, as shown in Fig. 4, and extended rearwardly at one side of the said balancewheel. in any case, however, it is essential that'the said shifting-lever shallbe disposed closely adjacent to the path of the work passing through the sewing-machine and that the handle end of said lever shall be extended to a point in advance of the frame or head of the sewing-machine. so that it shall be disposed within convenient reach of the guid- 18 is a brake device which comprises a brakeshoe 23, which is adapted to bear against the periphery of the fly-wheel 3. This brakeshoe, as in Fig. 2, may be mounted directly upon the upper side of the shifting-lever, which latter is bent upward, so as to cause it to lie in a plane where the said brake-shoe 23 shall engage the rim of the fly-wheel whenever the shifting-lever is operated to disengage the clutch mechanism for the purpose of stopping the machine. The brake-shoe 23 is preferably wedge-shaped, as-shown in Fig. 5, so that it will easily and certainly engage the fiy-wheel when the shifting-lever is pushed into the position indicated. It will thus be seen that when the operator actuates the said shifting-lever for the purpose of stopping the machine the brake mechanism is thrown into operation and the stoppage will thus be quickly and elfectively performed without the necessity of having recourse to the usual method of manually checking the rotation of the flywheel. The shifting-lever will be possessed of some degree of resiliency and will thus hold the brake-shoe in engagement with the fly-wheel with sufficient springiness to avoid atoo sudden and injurious action of the brake mechanism.

When the construction illustrated in Fig. 4 of the drawings is resorted to, where the flywheel 4 is disposed so close to the table as to make it'impossible or inconvenient to extend the shifting-lever under the said fly-wheel, the brake-shoe 23 may be suitably connected with the edge of the shifting-lever and be permitted to slideupon the table directly under the fly-wheel, it being, if necessary, disposed toone side of the axial plane. The operation will be identical with that already described, the lateral movement of the shifting-lever serving to engage or disengage the brake-shoe with the periphery of the fly- Wheel, according to whether the motor-clutch is thrown out of or into operation.

The operation and advantages of this invention will be readily understood from the foregoing description, taken in connection with the drawings hereto annexed. To applythe device in position for operation, it is simply mounted upon or connected with the sewingmachine table by means of the clamping-screws 8, after which the belt or band 22 is adjusted in position upon the pulley L and in the annular groove 14 of the cylindrical clutch member 12. To tighten the belt, it is only necessary to slightly loosen the clampingscrews, and the base 6, with the parts mounted thereon, may be moved in an outward direction from the pulley 4 until the belt is considered to be sufiiciently taut, after which the clamping screws may again be tightened,

thus maintaining the device in operative position. To stop the sewing-machine, it is not necessary to stop the electric .motor, but only to operate the shifting-lever to disengage the clutch members and operate the brake, the motor continuing in operation, while the work of the sewing-machine is temporarily suspended.

It will be seen that by this device the sewing-machine may be very quickly started or stopped, according to the will of the operator, the electric motor continuing in operation constantly, thereby avoiding the necessity for manipulating the switch or connecting and disconnecting the conductors. If the current gives out or if for any other reason it shall be desirable, the belt may be shifted to the drive-Wheel and the machine operated by foot-power.

My improved device is capable of being attached for operation to any sewing-machine of ordinary construction without in the least altering the construction of such machine or preparing it to operate in connection with said device, and the latter when not in use may in a moments time be detached and stored away.

Having thus described my invention, I claim-' The combination of a supporting-table, a driven machine supported upon said table and including a drive-wheel, a bracket detachably connected with said table, a motorsupported upon said bracket, a shifting-lever pivotally connected with the latter, the handle of said lever being extended in proximity to the drivewheel of the machine supported upon the table, and a brake-shoe connected with said lever and adapted to engage the periphery of the driving-wheel.

In testimony that I claim the foregoing as my own I have hereto afiixed my signature in the presence of two witnesses.

JACOB H. MACON, JR. Witnesses:

GEO. P. RANEY, J r., W. W. PIERCE.

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