US238561A - Thill-coupling - Google Patents

Description

(No Model.)

J. BOZORTH.

Thill Coupling.

No. 238,561. Patented March 8,1881.

UNrrnn STATES PATENT Qrnron.

JOHN BOZORTH, OF PHILADELPHIA, PENNSYLVANIA.

THlLL-COUPLING.

SPECIFIGATION formng' part of Letters Patent No. 238,561, dated March 8, 1881.

Application filed October 19, 1880.

To all whom it may concer'n Be it known that I, JOHN BozoRTH, of Philadelphia, Pennsylvania, have invented a new and useful Thill-Ooupling for Carriages, of which the following is a specification.

The object of my invention is to prevent the thill or shaft from rattlin g and it consists in securing to the end of the shaft a stub end, on which is fitted a strap or forl, which holds the draft-bolt in close metallic contact with its bearin g by means of a rubber spring compressed by an eccentric tightener.

In the drawings making part of this specification, Figure l is a side elevation of the shaft, coupling, and axle. Fig. 2 is a section through the same. Fig. 3 is a front view. Fig. 4 is a front view of the parts detached. Fig. 5 is a. plan of the axle and fork. Fig. 6 is a side view of the tightening-key. Fig. 7 is a section through the stub, showing the stem of the eccentric in its place.

A is the axlc carrying the fork B, vfastened to it by bolts in the usual'manner.

O is the bolt to which the shaft is hinged.

D is the thill or shaft, which is nearly horizontal when upon the horse, except that part of it nearest the carriage, which is bent almost to a quarter turn. To the under side of this bend a stub, E, is secured by bolts. Astrap, h, is fitted upon this stub, inclosing a brass, 82, the stub end and the brass each being bored to fit one-half of the pin O. There is inserted between the strap and the loose brass a piece of elastic gum or india-rubber, k, to act as a spring against the brass. Both ends of the strap are bored with holes m for the insertion of the eccentrie. These holes have at one side a keyway suitable for the insertion of the steln p' of the eccentric L. This key is made with a handle, P, a cylindrieal stem, 19', of the same diameter as the hole m, and projections 192 193 upon the stem. The end of the stub E is drilled through at n with a hole correspondin g in diameter to that of the lower hole, m, plus the keyway, so that the stem turns with an eccentric motion within the hole m.

To conple the shafts to the carriage, place the stub E upon the pin O, which always re (No model.)

mains in its place in the fork. Then bring up to it from the under side the strap h, having within it the lower brass and spring k. Next put the stem p' of the eccentric through the holes m and n and turn it half-way round. This will cause the stcm to move with an eccentric motion, raising the strap, compressing the spring lc, and bringing the stub, strap, brasses, and rubber all into close and secure contact. The check-strap R, passing through the eccentric and through an eye upon the thill, holds the handle of the eccentric in its Vertical position. In this position the projection 192 is not opposite the keyway in the strap h, and the eccentric is thus prevented from falling out.

By this invention I avoid the usnal plan of forcing the bolt G through an elastic `joint, which is a difficult operation.

In my invention the stub end is coupled around the pin while in its place. I also have the brass bearing 82 in contact With the pin O, and keep them in contact by a rubber spring behind the brass, and avoid the wear which occurs when the rubber is in contact with the pin, as heretofore made.

I do not confine myself exclusivel y to the eccentric herein shown for tightening up the strap, as the ordinary connecting-rod taper key will answer without a spring. The strap may also be made solid with the stub and forked, the 'pressure in this case being put upon the rubber by a screw and a cross bar below. Either of these modifications will accomplish in an inferior manner my object of tightening up a metal bearing against the pin O with a spring behind the brass.

I claim- In a thill-coupling, the combination of the shaft D, the stub end E, secured to the shaft, and the strap h, carried by the shaft and holding the bolt O in metallic contact with its bearing by means of the eccentric L, as herein described.

JOHN BOZORTH.

Witnesses:

EDWD. BROWN, JOHN F. GRANT.

Images