Clevis-locking device.

Application

To all whom it may concern:

. Be it known that I, John Keogh, a citizen of the United States, residing at St. Peter, in the county of Nicollet and State of 5 Minnesota, have invented certain new and useful Improvements in Clevis-Locking Devices, of which the following is a specification.

This invention relates to an improved de10 vice for locking a draft clevis to a swingletree oi* a doubletree.

One of the objects of the invention is to provide a locking device of this character that will automatically be placed in opera15 tive position when the clevis is moved to operative position and which will be positively locked against displacement until such time as the clevis is swung or moved to inoperative position.

A further object of the invention is to provide a device of . this character which consists of comparatively few parts and is simple in construction, but durable and well adapted to withstand the rough usage to 25 which devices of this character are ordinarily subjected.

For a full description of the invention and the advantages and merits thereof, reference is to be had to the following description and 30 accompanying drawings, in which:—

Figure 1 is a plan view of a doubletree showing the invention applied.

Fig. 2 is a section taken on the line 2—2 of Fig. 1. . .,

Fig. 3 is a perspective view of the locking pin.

Fig. 4 is a perspective view of the clevis constructed in accordance with my invention.

Referring to the drawings, wherein for the purpose of illustration, like characters of reference indicate corresponding parts throughout the several views, the doubletree, a conventional form of which is indi45 cated at A, is provided near each end when a suitable opening 5 and a .key way 6. The key way communicates with the opening, and preferably extends toward the rear edge of the doubletree as shown to advantage in

Figs. 1 and 2 of the drawing. The clevis 7 is of the usual formation which consists of the substantially U-shaped member including the arms 8 and 9 each of which is provided with a pin receiving opening 10 and a key way 11, the latter communicating with the openings and extending toward the

Patented Jan. 38,1919.

Serial No. 220,340.

closed end of the clevis, as shown to advantage in Fig. 4 of the drawing.

In Fig. 3 is illustrated the locking pin which consists of the cylindrical shank 12 60 having a head 13 at one end. Integrally formed with the shank, substantially intermediate the length of the shank is a locking key 14 which is of a length equal to the • thickness of the doubletree as shown in Fig. 65 2. Near the end of the shank 12 is a binding key 15 and this key is adapted to extend beyond the lower side of the clevis when the pin is in operative position, the pin being long enough to extend beyond the bottom of 70 the clevis. The bottom of the clevis, as illustrated in Figs. 2 and 4 of the drawing, is provided with a ridge 16, which extends around the marginal edge of the opening 10 in the lowermost arm of the clevis and this 75 ridge is of tapered formation, its thickest part being diametrically opposite the key way 11 while the ends of the ridge merge into the edge of the opening near the side of the key way 11 so that when the locking 80 key is thrust through the opening, the binding key 15 will pass beyond the arm of the clevis and when the latter is turned, the ridge, which thereby forms a cam surface, will engage the end of , the binding key 15 85 and bind the head of the key tightly against the opposite arm of the clevis to more effectively hold the key against displacement and also prevent free movement of the clevis when in operative position. 90

When the clevis is being mounted, it is placed upon the end of the doubletree A as indicated by dotted lines in Fig. 2. The key way 6 will then be in alinement with the key ways 11 and the pin may be passed through 95 the alined openings 5 and 10. When the key 14 is in registration with the key way 6, the clevis may be turned by swinging the same over the end of the doubletree to the position shown by full lines and this action 100 will bring the parts to the position shown in Fig. 2 and at the same time cause the cam surface to engage the end of the binding key 15 as above set forth.

In order that the single clevis may be 105 attached to the center of the doubletree A or for the purpose of employing the invention with a swingletree, the opening 17 is provided intermediate the length of the swingletree or doubletree as shown in Fig. 110 1 of the drawing. The key way 18, however, in tliis instance is disposed at an ob1,292,801 tuse angle with, respect to the transverse center line of the doubletree so that it is merely necessary to swing the clevis at a slight angle in order to insert the locking ⁵ pin, whereupon the clevis may be swung to the position shown by dotted lines in Fig. 1 to bring the key ways 18 and 11 out of alinement thereby causing the locking pin to be held against displacement.

. From the foregoing it will be observed that a very simple and. durable, device has been provided, the details of which embody the preferred form. I desire it to be understood, however, that slight changes may. be

I⁵ made in the minor details of construction without departing from the spirit of the invention or the scope of the claims hereunto, appended.