US112616A - Improvement in treadles for sewing and other machines - Google Patents

Description

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.enoncnjw' MILES, ofr LYNN, MASSAcHUSnrTS.-

Letters Patent No. 112,616, dated March 14, 1871.

The Schedule referred to In these Letters atent and making part of the same.

To all whom it may concern'.'

in the county of Essex and State of Massachusetts, have `invented a new and improved Mode of Constructing Treadles designed to be used in connection with Sewing and other Machines, when `such ma- `chines are" carried by steam or other power, ybeing especially adaptedV to be .used with the McKay sewing-machine;` and I do hereby' declare that the i following is a full and exact` description thereof', reference being hadto the accompanying drawing and to the lettersof'reference marked thereon, which drawing forms a part of this specification, and which represents in- Figure I, a perspective view of the whole machine attached to the Hoor or.platform.

Figure II, a longitudinal vertical section of the same, showing the joint K andthe position of the fulcrum D and thebosses E. E. A f i Figure III, the notched sliding plate shown in Fig.

"I, at .s

My improvement is upon that class of treadles, which is sometimes-called power-treadles, and Vis not designed to propel anymachine by foot-power,

but simply, by its action, to throw a tightening pulley up .against a belt, or? to thro'w some clutching arrangement into connection, 'and thereby cause a transmission of power from'the shaft-pulley to the machine to be operated." Y

In running `a sewing-machine carried by power with a treadle, as ordinarily constructed, the op-4 i rigid, vini'lexible bar, I-use one provided with a freely turning joint near the center of its length, V:shown at K, in Fig. I, thus forming the creadlel oftwo sections, B C, of nearly equal length.

Under section (l -I place a supporting-block or fulcrum, D,of the required height, at such apoint in relation to the center of `this section as shall give n such a `decided ,preponderance to the endv carrying the notched plate TG that its weight will always bring it down tethe .floor or platform `without the aid of aspring.

Theforward enillcf section-B provide with a thin l Y plate, A A, which I call the foot-plate. This plate is ,"Be it known that I, GEORGE W. MILES, of Lynn,

of suitable form, and of ample size to allow the use of either the right or left foot, at the pleasure of the operator.

` The forward edge of the foot-plate is kept in position, very nearly in Contact with the door or platform, by being attachedv to the same by the journals I I and boxes or bearings L L.

The other end of this section Bcis free to rise and fall with the end of section C, to which it is attached at the joint K. j

To the further end of section C `I attach, in a vertical position, a thin triangular block or plate, G, shown in position inv Fig. I, and detached by Fig. III.

The lower edge oi'fthis plate is Vdovetailed, and isif held to the treadle-bar by two cleats, which form a dovetailed groove. V

lhis plat/e is formed higher at one end, and providecLwit-h'the series of notchesfand made adjustable in the dovetailed groove in order to compensate for any slight variations in the length of the rod H or of the belt used, or any other similar variations which may exist or which it may be desirable to make.

Upon the underl side of the treadle-bar, section C, are cast several bosses, designed to enter a corresponding depression inthe top of the fulcrumblock D.

lhis boss or projection keeps the tradle-bar in position, and several similar ones are provided,.so

that the p ositiou of the fulcrumcan. be changed' it' desired. l Y

All binding of the parts is avoided, and perfect freedom allowed to the 'movements oi' the treadle,

by the play of plate Gr and by the con-struction of the fulcrum-bloch` I)which is so made that it is capable'of a rocking movement either on a suitable bed-piece or the floor or platform, to which it may point above the floor or platform, and in using the treadle he has simply to slide his foot from the door or Yplatform up the inclinedwfoot-plate in order to cause adepression of the furtherr end of section B'. This movement, of course, correspondingly depresses Athe forward end of section C, which causes the further Vend of this section, which, by means of `the p notched plate-G, is in connection with the rod H,

which supports and operates the arm of the sewing or lever C, the fnlcrum D, and the sliding head G, or other machine carrying the tghtening-pniley, to when combined and arranged to operate substantially rise till it produces the requisite tension ot' the belt as set forth.

passing from the shaft-pulley to the machine to be GEORGE W. MILES. operated.

Vhat, therefore, I claim as my invention, and de- Vitnesses: sire to secure by Letters Patent, is-. A. E. BLOOD,

The combination of the treadle A B with the bar ROBT. RAMSDELL.

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