USRE5385E - Improvement in treadles - Google Patents

Description

c. B'. KinKHAM.

Treadles' Beissued April 29,.1873..

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UNITED STATES PATENT OFFICE.

GEORGEB. KIRKHAM, OF NEW YORK, N. Y.

IMPROVEMENT IN TREADLES.

Specication forming part of Letters Patent No. 136,603, dated March l1, 1873 5 reissue No. 5,385, dated April 29, 1873 5 application filed April 3, 1873.

To all whom it may concern:

Be it known that I, GEORGE BYRON KIRK HAM, of No. 167 East Thirty-third street, New York city, county and State of New York, have invented an Improvement in r.Ireadles or Foot-Powers, of which the following is a speciiication:

The object of this invention is to provide a foot-power which is applicable to sewing-machines, jig-saws, hand-lathes, and the like, which will always turn the ily -wheel in the right direction with a noiseless and positive motion.

Figure 1 is a general view of the invention, showing the various angles at which the bearings-arms can be placed. Fig. 2 shows a modification, with double pitman and curved arms. Fig. 3 is an end view of the iiy-wheel beveled arms. Fig. 4 is an end view of a shallow grooved wheel and beveled arms. Fig. 5 is an end view of a hat wheel and arms. Fig. 6 is an end view of a beveled wheel and grooved arms.

Part of this improvement in treadles is anticipated in a previous patent of mine, December 5, 1871; but in that patent I represented the bearing-arms as being always vertical in a line with the pitman, and with a great deal of shifting apparatus 5 but I have since found by experiment that it is better to put the bearing-arms at an angle to the pitman, and to attach the shifting apparatus, when required, to the treadle and pitman in the shape of friction-clutches F F and H I K, Fig. l; also, I have made various modifications in the .bevels and grooves of the arms and wheels.

ln Fig. l, A is the ily-wheel ofthe machine; B B, the bearing-arms; C, the pitman; and D, the treadle. Ihe'beveled arms B B and their body E can be set by a a at any angle with the pitman from vertical to a right angle, as indicated by the dotted lines, but the angle represented in black lines is about the best in practice. y

When the treadle D and pitman C are raised i the arm B' catches in the groove of the flywheel A and runs fron B to E, causing the wheel to revolve in the direction of the arrow, When the treadle and pitman are lowered the upper arm Bstrikes in the groove of A and runs from E to B, continuing the revolution of A inthe samedirection. These bearing-arms B B may be either rigid or of a flexible material; but if of the latter they must be tightly stretched by screws, or by any suitable means.

To keep the pitman C steady,and in order that it may oier some resistance to the backward-and-forward motion caused by A B Bf, I have attached to it andthe treadle various friction-clutches, F F and H I K. These can be used together or separately, as they may be needed. At some angles of the bearingarms to the pitman these friction-clutches may be dispensed with, the vis inertia of B B C being sucient to effect the purpose. In operation they act as a shifting apparatus, and increase the traction of the arms B B against A. F F are two friction-clutches, hinged to the treadle and pressing on either side of the pitman. Their pressure against the sides of the pitman is regulated by the screw and cir cular spring G. H is a prolongation of the pitman C, K a prolongation of the treadle, and I a slide pressed against E by the spring J. I and K, being on either side of H, produce considerable friction, which is what is requisite to steady the pitman.

When it is necessary to have a very uniform motion to the wheel A the arms B Bl must be curved somewhat, as shown in Fig. 2 also,

there can be used the doublev pitman U C in the place of the body E to hold the arms B B. As the arms B B or wheel A wear by conA stant'use, there would soon result a disagreeable rattling noise. To prevent this and keep the arms B B always snug to the wheel A setscrews b b are used to bring the arms B B nearer together when necessary.

In Fig. 3 is shown the wheel A with a deep groove and beveled arms B B. Between the two halves of A are placed several disks, c c, of pasteboard, leather, or other suitable material. By unscrewing d d and taking out one of the disks c the two halves of the wheel A A can be brought closer together, and thus take up any wear in the arms B B or wheel A A.

In Fig. 4 is shown a shallow groove and broad bevel.

In Fig. 5 both the arms B B and wheel A are tlat Where they bear against each other. Their surfaces could also be curved either Way; but it is not necessary to represent this.

In Fig. 6 the Wheel A is beveled and the arInsB B' are grooved. Any degree of bevel or groove can be used-from the sharpest acute angle to a curved or hat surfacep-n the arms B B' and Wheel A A' 5 but it is sufficient to indoate a few of the modifications.

In my invention I claiml. The arrangement of the hearing-arms B B' at an angle to the pitxnan C and the setscreWs a a, substantially as and for the purpose hereinafter set forth.

2. The combination of frction-olutehes F F G and H I J K With the pitnlan and treadle,

substantially as and for the purpose hereinbefore set forth.

3. The arrangement of the curved arms B B' set-screws b b, and double pitmau G C', substantially as and for the purpose hereiubefore set forth.

4. The arrangement of the two halves ofthe Wheel A A', disks c c, screws d d with grooves,y

bevels, curved or at surfaces to the arms B B' and Wheel A A', substantially as and for purpose hereinbefore set forth.

GEORGE BYRON KIRKHAM.

Witnesses A. L. WATsoN, H. M. PAIN.

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