US448707A - Thill-coupling - Google Patents

Description

(No Model.)

P. BROADBOOKS. THILL COUPLING. No. 448,707. Patented Mar. 24, 1891.

, UNITED STATES PETER BROADBOOKS, OF BATAVIA, NElV YORK.

PATENT ()FFICE.

THlLL-COUPLING.

SPECIFICATION forming part of Letters Patent No. 448,707, dated March 24, 1891. Application filed March 28, 1890. Renewed January 15, 1891. Serial No. 877,887- (No model.)

To all whom, it may concern.-

Be it known that 1, PETER BROADBOOKS, a citizen of the United States, residing at Batavia, in the county of Genesee and State of New York, have invented a new and useful Improvement in Thin-Couplings, of which the following is a specification.

My invention relates to improvements in thill-couplings, in which the ordinary clip having the forwardly-extending ears is used in conjunction with an improved thill-securing bar, coupling-pin, 850.; and the objects of my improvements are to provide a coupling that will of itself be anti-rattling, inexpensive, and durable, as well as affording facilities for securely clamping the rear end of the thill to its adjacent coupling-bar in such manner that the wood at this point will not be fractured by the side strain incidental to the use of the ordinary securing-bolt. I attain these objects by the mechanism illustrated in the accompanying drawings, in which-- Figure 1 is a perspective view of the entire coupling. Fig. 2 is a cross-sectional view taken through the center of the coupling-pin. Fig. 3 is a view of the coupling-pin detached, and Fig. 4 is a modification.

Similar letters refer to similar parts through out the several views.

The shackle or clip A is provided with the usual screw-threaded ends ct, carrying the securing-nuts a, by means of which, through the intervention of the clamp-bar A, the clip is secured to the axle of the vehicle in the usual manner.

B are coupling-ears attached to the part A, and are provided with lateral holes, through which the coupling-pin B passes and to which is hinged the thill-iron 0, upon which is mounted the rear end of the thill G. This iron 0 is provided near its rear end with laterallyextending ears 0 and having holes 0', which holes are outside of the edge of the main iron, so that the clamp D may pass over the wood thill, while the legs of the clamp at their screw-threaded ends a are made to pass through the holes 0 and to impinge against the thill upon either side thereof. Upon these 1 clamp ends Ct are placed screw-threaded nuts ct, by which the thill is securely fastened to the iron 0, thereby making a fixed fastening and preventing the splitting of the wood by any side wrench of the thill, as is liable to be done when the parts are united by the usual bolt passing through both the wood and metal and centrally of the same.

E are cylindrical collars attached to the outside of each of the shackle-ears, and through the whole of which passes the coupling-pin. Upon the periphery of each collar is made a screw-thread, and screwed thereupon is the elongated closed-end nut E, the office of which will presently appear.

F is a set-screw screw-threaded into the eye end of the iron 0 and passing entirely through the lower wall of the cylindrical part, so that the inner end of the set-screw may enter within the groove Z), made in the pin 13', when the same is in working position.

The endsof the coupling-pin are made to project beyond the collar E, so that as the nut E is screwed upon the collar the closed end will upon the inner side thereof be made to impinge against either end of the bolt for the prevention of endplay of the same.

By preference, I make conical ends upon this bolt with a corresponding concavity in the nuts end, so that as the parts become worn the nut maybe tightened upon the bolt end, which will (by this ball-and-socket mechanism) prevent all rattling by the end movement of the bolt, while the adjustment of the set-screw prevents any rattling of the thilliron upon the bolt, thereby securing an antirattling thill-coupling without any acconipanying complications to detract from the symmetrical appearance of the coupling.

It will be observed that the coupling-pin may be kept from lateral displacement by means of the set-screw, the end of which enters within the peripheral groove made in the pin; also, that the set-screw may be dispensed with altogether and the pin be held in place by meansof the nut alone; but I prefer to use both devices in order that all rattling of the parts'may be obviated.

If desired, the nut E and collar E may be made in one and the same piece, and the long bearing for the pin still be retained by having the nut made with a thread upon its peripheryat its inner end and screw-threaded into the car 13, as shown in the modification represented by Fig. 4; but I prefer to have the collars permanently attached to the cars,

so that by a single operation of the drill a true line-bearing may be formed uniform with the pin-an operation not easily attained by boring previous to attachment, which must be done when the capped nut and bearingcollar are in one and the same piece. Vhen the pin is (through the intervention of the set-screw) made to move with the thill, this long bearing formed by the collar-extension is of importance, as the abrasion of the parts in a given time is less than it would be were the thin ears alone used to overcome the Wearing resistance incident to the drawing of the carriage.

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with the thill draftiron, of the coupling-clip, the laterally-extending collars permanently secured to the draft-ears, whereby a long bearing is secured, the coupling-pin passing entirely through the whole, and the capped pin-retaining nuts screw-threaded upon either collar, for the purpose described, and substantially as herein set forth.

2. The combination, with the thill draftiron, of the coupling-clip having the laterally-extending collars permanently secured to the draft-ears, the peripheral screw-thread upon the collar, the coupling-pin provided with the rounded ends extending through and beyond each collar, and the capped nut, the inner side of which cap is made conformable to the rounded end of the coupling-pin and capable of direct impingement thereagainst, for the purpose described, and substantially as herein set forth.

3. The combination, with the thill draftiron, of the set-screw in the eye thereof, the coupling-clip provided with the laterally-extending collars upon either draft-ear, the coupling-pin capable of passing through the whole, the peripheral groove centrally of the pin, and within. which groove the inner end of the set-screw enters, for the purpose described, and substantially as herein set forth.

PETER BROADBOOKS. Witnesses:

G. W. FORD, FRANK. W. BALLARD.

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