US495855A - Thill-coupling - Google Patents

Description

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W; E. TYDEMAN.

THILL GOUPLING.

No. 495,855. Patented Apr.. 18, 1893.

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UNITED STATES PATENTl OFFICE.

WILLIAM H. TYDEMAN, OF WALSENBURG, COLORADO.

THlLL-COUPLING.

SPECIFICATION forming part of Letters Patent No. 495,855, dated April 18, 1893.

I Application iiled September 7, 1892. Serial No. 445,265. (No model.)

To a/ZZ whom it may concern.'

Be it known that I, WILLIAM I-I. TYDEMAN, of Walsenburg, in the county of Huerfano and State of Colorado, have invented a new and Improved Thill-Ooupling, of which the following is a full, clear, and exact description.

My invention relates to an improvement in thill couplings, and has for its object to pro- Vide a thill coupling in which the shaft irons may be inserted and locked in an expeditious and convenient manner, and to so construct the coupling that it will be exceedingly simple and economic.

Another object of the invention is to form the coupling in such manner that when the shaft iron is in draft position in connection with the coupling the two can not be disconnected, and whereby when a disconnection is desired the shaft iron must be carried upward at an angle of practically forty-five degrees and removed from the coupling while in that position. The coupling is practically automatic, as no wrenches or other tools are required in its manipulation, nor is it necessary to remove any bolts.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth and pointed out in the claims.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar figures and letters of reference indicate corresponding parts in all the views.

Figure l is a perspective view of the coupling, showing the draft iron in draft position therein. Fig. 2 is a longitudinal section through the coupling, the shaft iron being in the same position as shown in Fig. 1. Fig. 3 is alongitudinal section through the thill coupling, showing the shaft iron carried up nearly to the position from which it may be removed; and Fig. 4 is a longitudinal section through the thill coupling, illustrating the position of the shaft iron when it is about to be removed, and the position of the locking dog.

The shaft iron A, is made to terminate at its lower end in a head B, and the forward face of this head is cylindrical, as shown at 10 in the drawings, and in the cylindrical forward face of the head a transverse channel 11, is about centrally produced, the channel being somewhat semi-circular in cross section, or practically so. In the opposite or rear face of the head a second transverse channel 12, is produced, the latter channel being somewhat U or V-shaped in cross section, its outer portion or mouth being wider than its inner portion; and im mediately below the rear channel 12, a concavity 13, is made in the head.

The body of the coupling comprises a clip section D which is adapted to be attached to the axle E; and from the forward face of this clip section two parallel arms 14 and 15, are horizontally projected, and the forward portion of the arms are preferably made narrower than the rear portion. A pin 16, is passed through both of the arms near their upper edges between their centers and rear ends, the pin being rigidly secured to the arms; and a second pin 17, is passed through the forward portions of the arms near their forward extremities. The rear pin 16, is adapted to enter the rear channel 12 in the .rear of the shaft iron, while the forward pin a rearwardly curved transverse spur 20, isv

formed, the spur curving in direction of the rear of the coupling, or away from the body portion of the dog.

When the shaft iron is in position in the coupling, the pin 16, will be seated in the inner or contracted portion of the channel 12 in the back of the head of the said shaft iron, and the transverse rib 19 upon the body of the locking dog will enter and fill the channel 11 in the forward portion of the shaft iron head, as shown in Fig. 2, the spur 2O eXtending upward and rearward over the upper portion of the head.

It is evident that a disconnection can not be made between the shaft iron and the coupling when the parts are in this position, as the more that forward tension is brought to bear upon the shaft iron the firmer it is locked IOO in the coupling. The shaft iron, however, can be removed from the coupling both expeditiously and conveniently, and it is accomplished in the following manner: The shafts are carried upward and rearward until they assume an angle of about forty-fve degrees to the arms 14 and 15, which position is illustrated in Fig. 3; and when the shafts are brought to this position the heads of the shaft irons are rocked forward, and consequently the ribs 19 of the locking dogs are forced upward and forward, and the final movement necessary in disconnecting the shafts from the thill coupling is to lift the heads of the shaft irons out from the coupling while the shafts are in their upper rearwardly-inclined position; and upon the upward movement of the shaft iron heads the ribbed portion of the locking dogs will be thrown forward and downward, and the curved end of the body portion of the dogs will be brought uppermost, as shown in Fig. 4, and therefore no impediment is offered to the outward passage of the shaft irons. The concavity 13, in the shaft iron heads is made in order that the shaft irons may be readily inserted in the couplings.

The operation of inserting the shaft irons into the couplings is as follows: The shaft irons are held in an upright position, slightly rearwardly inclined, and the channels l2 in the` rear portions of their heads are made to receive the pins 16 in the couplings. The dogs are then carried upward until their ribs 19 enter the forward channels 1l in the edges of the shaft iron, the shaft irons are thereupon forced downward,and they will be then locked between the pins 16 and the ribs on the lockingdog, the lock having somewhat of the nature of a cam lock.

The coupling is rendered anti-rattling by placing an elastic block 21, between the arms 14 and 15 against the clip section D, with which block the head of the thill or shaft iron engages when the device is in coupled position.

It will be understood that the device is as advantageously employed in connection with a pole as with a shaft.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-` 1. In a thill coupling, the combination, with a coupling comprising a clip, arms projected from the clip, and pins passed through the arms one in advance of the other, of a shaft iron terminating in a head having a channel j in its front and rear portion, the rear channel being adapted to receive one of the pins of the coupling, and a locking dog pivoted upon the other pin and provided with a rib upon one side, the said rib being adapted to enter the forward channel in the shaft iron head, substantially as shown and described.

2. In a thill coupling, the combination, with a clip section, arms projected therefrom, pins passing through the arms, one in advance of the other, the rear pin being higher than the forward one, and a locking dog pivoted upon the forward or lower pin, the said dog comprising essentially a circular body, a circular rib projected from the lower rear face of the body and a spur formed upon the body above the rib, of a shaft iron terminating at its lower end in a head, the said head being provided in one side with an exterior channel to receive the rear pin and having produced upon its forward surface a second channel to receive the rib of the locking dog, as and for the purpose specified.

3. In athill coupling, the combination, with a clip, arms projecting therefrom, apin passed through the upper rearward portion of the arms, a secondV pin passed through the for- Ward portion thereof below the plane of the rear pin, and a locking dog pivoted upon the' forward pin between the arms, the locking dog comprising essentially a circular body, a cylindrical rib projected from its forward-surface, and a rearwardly curved spur formed above the rib, of a shaft iron terminating at its lower end in a head, the said ironhaving a channel semi-circular in cross section produced in its forward face to receive the rib of the locking dog and having formed in its rear surface a tapering recess for the reception of the rear pin of the coupling, the under rear surface of the head being cut away, as

\ specified.

WILLIAM I-I. TYDEM AN.

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