US276502A

US276502A - tatum

Info

Publication number: US276502A
Authority: US
Publication date: 1883-04-24
Anticipated expiration: 1900-04-24

Description

(No Model.)

3. 0. TATUM, Jr.

I SEWING MACHINE TRBADLE, No. 276,502. Patented Apr.24, 1883.

invented a new and UNITED STATES PATENT OFFICE.

SAMUEL C. TATUM, JR, OF CINCINNATI, OHIO, ASSIGNOR TO SAMUEL (J.

TATUM 8a 00., OF SAME PLACE.

SEWING-MACHINE TREADLE.

SPECIFICATION forming part of Letters Patent No. 276,502, dated April 24, 1883,

' Application filed December 19, 1882. (No model.)

To alt whom it may concern:

Be it known that I, SAMUEL O. TATUM,JI., of Cincinnati, Hamilton county, Ohio, have useful Improvement in Sewing-Machine Treadles, of which the following is a specification.

In sewing-machine treadles heretofore in use vibrating by knife-edges upon the supporting-bar or brace-rod, such rod has been grooved at remote parts of its length to receive projections from the treadle. A serious objection has arisen to this method, owing to the liability of such grooves to be formed out of alignment, thus causing the projections to bind and jam within the grooves and cause the treadle to labor and to unnecessarily fatigue the operator.

My improvements havein view the doing away with the above laborious and unsatisfactory method.

1n the accompanying drawings, Figure 1 is a perspective view of a sewing-machine treadle and accessory parts embodying my invention. Fig. 2 is a partly sectional elevation of the same. Fig. 3 represents a part of the bearingrod with inverted-V bearing and confining lip or yoke and portion of corresponding treadle. Fig. 4 showsa modification in which the bearings are located within the treadle.

A may represent the lower part of a sewing-machine frame; B, a rod which serves both to brace the frame and to support shells 0, having inverted-V-formed ridges c, which constitute the fulcrums upon which rest the slightly more obtusely notched or inverted-V- recessed lugs that project from the treadle D. The shell 0 has an obliquely-presented lip, c, that, projecting over the correspondingly oblique ridge of the lug d and bearing closely upon it, serves to prevent any accidental rising of the treadle ofi' of its proper bearings,

and at the same time prevents any lateral displacement. The shells 0, having been adjusted to their proper place upon the bearing-rod B, both longitudinally and circumferentially of said rod,so as to cause their inverted-V ridges to occupy the corresponding notches of the treadle-lug without binding therein, are firmly secured thereto by means ofscrews E.

Instead of extending laterally outward from the treadle, as in Figs. 1, 2, and 3, the lugs may project within the treadle and be held by reversely-presented shells, as shown at Fig. 4.

It is apparent that the capacity of circumferential adjustment of the shell 0 completely overcomes the liability of the non-adjustable edges of the ordinary treadle to bind Within the notches of the bearing-rod arising from the lack of absolute alignment of those parts, such as frequently occurs.

Sewingmachine treadles bearing upon knil'eedge supports and having straight covers or confining-lips have been made; but such bearings do not admit of adjustment as. to wear and for keeping the treadle closeto its beariugs, so as to prevent rattling and lost motion; and such treadles have also been made with knife-edges in treadle-bearings in grooves cut in the bearing-rod itself; but such bearings admit of no adjustment circumferentially of the rod when the grooves in the rod are not out exactly in alignment, which is generally the case. I therefore do not claim such bearings or such confining-lips, separately considered.

y; 1 claim as new and of my invention- In combination with a treadle-rod and treaille having grooved lugs of a sewing-machine, the

longitudinally and circumferentially adjustable "shells 0, having knife-edge projections 0, occupying the grooved treadle-lugs, and oblique lips c, overhanging and bearing on the upper sides of said lugs, in the manner and for the purpose set forth.

In testimony of which invention I hereunto set my hand.

SAM. C. TATUM, JR. Attest:

GEo. H. KNIGHT, SAML. S. CARPENTER.