Improvement in electro-magnetic sewing-machines
US 121622 A
Description (OCR text may contain errors)
2 Sheen-Sheet 2.
N0. LZZ, Paten-ted Dec.5,1871.
UNITED STATES MILFORD, CONNECTICUT.
vGEORGE M. HOPKINS, OF ALBION, ASSIGNOR TO HIMSELF -AND GEORGE H.
SHATTUCK, OF NEV YORK, N. Y., ASSIGN ORS TO HENRY G. THOMPSON, OF
IMPROVEMENT IN ELECTRO-MAGNETIC SEWING-MACHINES.
Specification forming part of Letters Patent No. 121,622, dated December 5, 1871.
To at(y whom it muy concern:
Be it known that I, GEORGE M. HOPKINS, of Albion, in the county of Orleans and State of New York, have invented certain Improvements in Sewing-.Ellacl1ines, of which the following' is a specification:
The iirst part of my invention relates to the combinzttion of one or more helices and armatures with the needlebar or arm or main shaftot' a sewing-inachine in such a manner that when a current of electricity is passed through the helices motion will be communicated to the needle-bar or arm or main shaft by the drawing of the armature up or down. The second part of my invention relates to the combination of suitable gearin actuated by a spring or weight to change the elastic current at regular intervals, to insure uniform motion to the needle-bar and parts connected with it.
Figure l represents the helices as connected with a straight needle-bar. Fig. 2 represents the helices connected with the shuttle-carrier. Fig. 3 is a side elevation of a machine, showing the helices connected with the rocking needlearm, also the gearing' for changing' the electric current. Fig. I shows the helices connected with a crank on the revolving shaft ofthe sewingmachine.
In Fig. I, A is the ordinary support for the needle-bar of aseWing-machine. B is a needlebar ot' some non-magnetic material which slides through suitable ways in the support A. C is a softiron armature placed on the needle-bar B. I) I) are helices firmly fixed to the support A in such a position as to allow the armature C to draw into one and the other alternately, as the electric current is changed. a a and b b are Wires leading from the helices to the gearing for breaking the current. In Fig. 2, E is a nonmagnetic rod attached to the shuttlecarrier, having the armature C, which is surrounded by the helices D D which draw the armature back and forth as the electric current is changed from one to the other.
I design to move the shuttle or looper and needlebar at proper intervals by changing the electric current, so that the stitch can be made without gearing or levers; or the reciprocating motion may be given to any part of the machine by the helices and armatures, and communicated by gearing or levers to any other part.
In Fig. 3 the same letters of reference indicate parts similar to those referred to in Fig. l.
The wires u a and b b are clectriiied by means of any of the known devices fore-hanging electric currents attached to the clock-work F. c c are wires connecting the battery.
The speed ofthe machine is controlled by the fan-wheel C', which may be made to revolve with varying speed by turning the fans (I d. In Fig. 4, H, I, and J are oscillating' helices, so arranged as to draw alternately on their respective armatures Ii, L, and M, which are connected with the crank N on the main shaft of a sewing-machine.
I claim as my inventionl. The combination of the helices I) l) with the needle-bar B of a sewing-machine, substantially as shown and described.
2. The combination of the helices I) I) with the rod E, or its equivalent, and the shuttle-carrier or looper of asewing-maehine, substantially as and for the purpose hereinbetore set forth.
3. The gearing F, in combination with the above devices, as shown and described.
Signed by me this 17 th day of January, 1870.
GEO. M. HOPKINS.