US174791A - Improvement in pitmen - Google Patents

Description

R. BUTTON.

PITMAN. No.174,791, Patented Mar'h14,1e7e.

NITED STATES ENT OFFICE.

RUFUS DUTTON, OF YONKERS, NEW YORK, ASSIGNOR TO DUTTON & OO.,

' OF SAME PLAGE.

IMPROVEMENT IN prrr/uam.

Specification forming part of Letters Patent No. 174,791, dated March 14,1876 application tiled September 29, 1874.

To all whom it may concern Be it known that I, RUFUs DU'r'roN, of Yonkers, in the county of Westchester and State of New York, have invented a new and useful Improvement in Pitinan-Connections; and l do hereby declare that the following is a full, clear, and exactdescription thereof, and otits mode or manner of operation, referenee being had to the accompanying drawings, andl to the letters of reference marked thereon, and making a part of this specification.

My invention relates to a new and improved construction of pitman-connection, the object or purpose of which is that the wear of the parts from use shall be constantly taken up, automatically, and the joint thus always be kept close and tight.

My invention is more particularly designed for making the attachment of the pitman or connecting-rod to the knife-head in mowing or reaping machines, and the description and drawings have more special reference to such an application; but the invention is adapted to other uses and applications.

Figure l shows a knife-head of a'mowingmachine connected to a portion of the connecting-rod according to my invention. Fig. 2 is a like View with Fig'. 1, the bolt removed and the joint spread apart. Fig. 3 is a detached view of the bolt securing the joints or parts together. Fig. 4 is a detached View,

slight-ly enlarged, of the device for holding and keeping tight the bolt.

`I use in making the connection a ball-andsocket joint, to prevent torsion or cramping of the joint when the upper and lower bearings of the connecting-rod are not in line or parallel with each other, or when the bar is folded or the points of the fingers are raised or lowered for the purpose of varying the cut of the knife. Ordinarily the joint between the pitman or connecting-rod and the knife-l head is very liable to become worn and loose, thereby rendering the knife and knife-head liable to become broken, and otherwise materially injuring the machine. f

My invention eft'ectually remedies or prevents such difficulty and its results, as by it, as fast as the joint may become worn by use,

AA L..

is attached thereto by a thread cut in the inside, into which the pitman-rod, which has also a thread out upon it, is screwed andl held firmly by a jam-nut.

Any other convenient mode of connecting the two may be adopted, although I prefer the method described.

To the socket-piece Dl is also hinged a metallic piece, E, the lower end of which has also a socket, F, tted to receive the other side of the ball C. Through the sockets D and F, and through the center of the ball C,

is a hole to take the bolt G; the hole in the ball being considerably larger than such bolt or pin, so as to allow lateral movement of the ball within `its sockets Without interference from the pin. One end of such pin has a head, and at its other end recesses g g are made on its opposite sides, to receive the wedge-shaped forked piece H, which is used to hold the pin .G in the sockets D and F, and press them upon the ball C. The wedge-shaped fork H has a stem, h, which rests against a projection on the socketpiece Df, and around such stem is put a coiled spring, l', which presses against such piece H, and forces its forks or prongs into the recesses g g, and, by their wedg'e form, holds the sockets D and F closely against the ball O. As the sockets of the ball become worn, the spring I, acting on the piece H, presses its wedge shaped prongs into the recesses g g of the pin G, thereby drawing up such pin, andconstantly keeping the sockets D and F closely to the ball C, and thus continually securing a lproper operation of the parts. In some cases but one recess in the pin G will be required, and but one wedgeshaped fork or fastening; but, when possible, two will be preferred. The recess in such pin may also be in the form of a slot through it,

having a wedge-shaped key pas-sing through such slot, acted uponv by any suitable spring.

This device or arrangement of a tapering 1. In combination with a. ball-and-socket joint, the recessed pin or bolt and tapering or wedge-shaped key or fastening, actuated by a spring, for automatically taking up the Wear of the joint, substantially as described.

2. The ball-and-socket joint, recessed bolt, wedged-shaped key, and spring, in combina.- tion with the knife-head and connecting-rod of a mowing or reaping machine, substantially as herein described.

R. DUTTON. Witnesses:

S. D. LAW, A. T. GURLITZ.

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