US309672A - Sewing-machine - Google Patents

Description

(No Model.) 7

' LE ROY WILLIAMS.

4 SEWING MACHINE. No. 809,672. PatentedQeo. 23,1884.

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LE ROY \VILLIAMS, OF LANSING, MICHIGAN, ASSIGNOR TO THE NEED SEIVING- MACHINE COMPANY, OF HARTFORD, CONNECTICUT.

sswlne wiacalae' SPECIFICATION forming part-of Letters Patent No. 369,672, dated December 23, 1884.

Application filed February 8, 1854. (No model.)

To all 2071/0712, it may concern:

Be it known that 1, Ln ROY \VILLmMs, of Lansing, county of Ingham, State of Michi gan, have invented an Improvement in Sewing-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention in sewing-machines relates especially to improvements in mechanism for lifting the presser-bar and its foot.

In this my invention a lever pivoted on a fulcrum-screw made adjustable in a diagonal slot made through the rearside of the machinehead has its shorter arm extended under a pin or lug projected from the inner side of the presser-bar, while the upper end of the said lever is acted upon by the under side oi." the cross-head attached to the needlebar, the same being made of suitable shape to operate the said lever and lift the presser-i'oot as usual while the needle is in the material and the di rection of movement of the material being sewed is being changed, substantially as hereinafter ptll'tlCllltll'l y set forth and claimed.

Figure 1 represents a sutlicicnt portion of a sewing-machine in front view (the face of the needle and presser-bar guidingblock being partially broken out) to show my invention; and Fig. 2, a rear side view of the machinehead, the supporting-arm and necdlebar actuating shaft being in section.

The head A, forming part of the usual supportingarm, l3, theneedle-baractuating shaft (l, its attached disk I), provided with a roller stud to enter the crosshead D the needle and presser bars I] F, respectively, the guidingblock D, attached to the head A by screws 2 2, the presser-foot-raising device G, and the cloth -plate H, but partially shown,) are as common to theWeed scwingmachine as known in the market, so need not be herein further described. The erosshead I)", secured to the needle-bar and grooved at its inner side, as usual, to receive the rollerstud ot' the disk D, has its under side shaped substantially as shown in Fig. 1, to act against the upper end or longer arm of the presser-foot-lifting lover a, pivoted upon the fulcrum-screw 12, extended from the inner side of the head A through a diagonal slot, a", (shownbest by dotted lines upon a lever and lift tltiepresser-foot.

in Fig. 2,) the said fulcrum-screw at its outer end, at the rear side of the head receivin g upon it a thumb or check nut, c, by which to hold the said fulcrum-screw in adjusted position, a washer (not shown) being preferably interposed between the said nut and the rear side of the head. The slot is diagonal, so that the arms of the lever to may be preserved in the adjusted positions of the leverin proper relation to the crosshead and the pin on the presserbar, hereinafter referred to. The shorter lower arm ofthe lever a is extended under apin or lug, e, projecting from the inner side of the presserbar F, as shown by dotted lines, Fig. 1. At each descent of the needle-bar the under side of the cross-head D strikes the longer arm of thelever a, and moves it to lift the presser-bar and its attached i'oot against the stress of the usual spring, which cooperates therewith to hold the presser bar and foot down in a yielding manner.

I am aware that the disk which carries the roller-stud that actuates the needle-bar has been provided with a cam projection to act An independent cam has also been provided on the needleshal't for operating such a lever, and, furthermore, the cross-head of a sewing-niachine has had a cam-surface applied to or made on its upper edge, to operate alever which is connected by a link to the presser-bar.

By employing the cross-head to actuate the presser-tootlifting lever at each descent of the needle-bar, it is possible to lift the presser automatically with but little st ain upon the machine, the movement of the parts are made easy and uniform, and the guiding-block in which the needle-bar slides may be made thin, thus insuring a compact arrangement of parts.

I have herein shown the cross-head which acts upon the presser-foot-lii'ting lever as that provided with the groove which receives the rollerstud which actuatcs the needle-bar; but I desire it to be understood that I might employ an additional piece or cross-head projecting from the needle-bar in suitable position and direction to act directly upon the presser-foot-lifting lever.

I claim 1. The lever c and a fulcrum-pin therefor, fitted in a diagonal slot in the sewing-machine head, combined with said head, the needlethe need1e-bar, the cross-head D thereon, the bar, the cross-head D to operate said needledriving-shaft O, and connections between said bar, and constructed, as set forth, to actuate the cross-head and shaft, and the presser-bar and lever a also, the driving-shaft G, and connec- I its pin 6, substantially as shown and described. 15 5 tions between the eross-l1ead and shaft, and In testimonywhereof Ihave signedniy name the presser-bar and its pin 6, substantially as to this specification in the presence of two shown and described. subscribing witnesses.

2. The lever (4, having the screw-threaded LE ROY WILLIAMS. fulcrum b, projecting through a diagonal slot, Vitnesses: [0 a in the sewing-machine head, and provided THOMAS W. HELEHANT,

with the set-nut 0, combined with said head, S. M. MILLER.

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