US102170A - Improvement in sewing-machine - Google Patents

Description

, G. A.-SM|TH & E. L. MILLER.

. Sewing Machine. No. 102,170. Patented April 19, 1870.

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GEQRGE A. SMITH AND EDWARD L. MILLER, OF PHILADELPHIA, PENN- SYLVANIA.

Letters Patent No. 102,170, dated April 19, 1870.

IMPROVEMENT IN SEWING--MACHINE.

The Schedule relerred to in these Letters Patent and making part of the name To all whom it may concern:

Be it known that we, GEORGE A. SMITH and En- YARD L MILLER, both of the city of Philadelphia, in th'e State of Pennsylvania, have invented a new and useful Improvement inSewing-Machines; and we do hereby declare the following to be a full, clear, and exact description thereof, which will enableothers skilled in the art to which it appertains to make and use our invention, reference being had to the accompanying drawing, which forms a part of this specification, and which is a perspective view of so much of a sewing machine as is necessary to show our improvement- Our invention consists in an improved means for taking up the thread immediately after the stitch is formed. d

A represents the needlebar, pivoted to the head B of the needle-arm O.

D is the faceplate, provided with an eye, E, and

G is the take-up stand, to which are pivoted the take-up lever H and bent lever I, connected by the link K.

On the head Bis a pin, L, against which the bent lever I I is pressed by the spring M. v

The arm I of the bent lever I I is made with a cam-face, as shown in the drawing.

The operation is as follows:

The thread passing from the spool, thread-check, and tension device, through the eye E, staple F, eye of the take-up lever, staple F, needle-clamp, and eye, successively, when the needle-arm begins to descend from its highest position, the arm I of the bent lever remains stationary, being pressed by the spring M against the pin L, which slides against the straight. portion of the cam-face without moving the lever. The take-up lever, therefore, likewise remains stationary, and the thread slips through the eye of the needle with the point of the needle has entered the cloth and the needle-arm reaches the position shown in the drawing, bringing the pin Lopposite the curved portion of the cam-face.

As the pin descends, the bent lever is pressed against it by the spring, and. the consequent movement of the arm 1 operates the link and depresses the long arm of the take-up lever with a quick motion, so as to allow the thread slack enough for forming the stick.

hen the needle-arm rises, the take-up lever remains stationary until immediately after the stitch has been formed, when the pin is again brought against the curved portion of the cam-face, so as to move the bent lever, and thereby raise the long arm of the take-up lever with a quick motion, so as to tighten the stitch in advance of the movement'of the needle-bar.

Having thus described the construction and operation of our improvement,

\Vhat we claim as new therein, and desire to secure by Letters Patent, is-- The combination of the take-up lever link, and bent lever, constructed with a cam-face and operated by the movement of the needle-arm, as described.

- G. A. SMITH. I E. L. MILLER.

Witnesses:

WM. J. Bonus, GEORGE E. BUCKLEY.

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