US1732888A - Quick-release pitman - Google Patents

Description

ct. 22, 1929. B. s: HARRIS ET AL 1,732,888

QUICK RELEASE PITMAN Filed Dec. 8, 1927 'IllllllI 6 ILL l Il Sw ||H| r da 7 1f l 5 :E;

u ab Q la @j WX a 2 GET-5-43- 1 1f 5a at e ef "alum, 1e 6 5 7 f4 5 Imm", v ab :Nw-:magi 'IWW 2 aa @C #i- HMC/M.

Patented ct. 22, 1929 masse FFI@ BURTON S. HARRIS AND HOWARD IVI. JOHNSTON, OF TORONTO, ONTARIO, CANADA,

A$SIGNORS TO MASSEY--HARRIS COMPANY, LIMITED, OF

CANADA TORONTO, ONTARIO,

QUICK-RELEASE PITMAN Application filed December 8, 1927.

This invention relates to ball and socket joints and more particularly to the removable, releasable type having a two part socket as commonly employed on pitmen for use on farm implements, and our object is to provide simple mechanism of this character which can be quickly released and reset. Another object is to provide means normally tending to retain the socket parts in their operative position.

IVe attain our objects by formingthe socket Ain two relatively movable parts, for en gagement with the ball. A yoke, guided in slots formed longitudinally of the socket parts, is formed integral with a stem which is reciprocably carried in a recess formed in the pitman. One or both of the outer sides ot the socket parts are inclined and are adapted to be engaged by the jaws of the yoke. The yoke is moved, by means of a spring, to releasably lock the hinged part in its operative position. A projection carried by one of the socket parts forms a fulcrum for a tool which is engaged with the yoke to move it, against the compression of the spring, to its inoperative position. During this movement the yoke is withdrawn along the slots until it is in position to engage the wall at one end of a slot. This holds the yoke in its inoperative position for the removal of the socket from the ball. The constructions are hereinafter more fully described and are illustrated in the accompanying` drawings in which Fig. 1 is a plan View of our socket joint i' applied to a pitman for use on a cutter bar;

Fig. 2 a side elevation of the same;

Fig. 3 a horizontal section of the same showing the parts in their operative positions; and

Fig. i a view similar to Fig. 3 showing the )arts in their inoperative positions.

In the drawings like numerals of reference indicate corresponding parts in the diferent figures.

1 and 2 are the relatively movable socket parts adapted to engage the ball 3, which may be formed on the heel plate of a cutter bar not shown. The socket part 1 is connected with or formed on the pitman 4 and the socket part 2 is hinged at 2a on the rear extension 2b Serial No. 238,614.

thereof which is secured to the pitman or formed on the part 1. The socket part 2 has its outer side 2c inclined and preferably the outer side 1c of the part 1 is also. inclined as shown. Slots 1e and 2e are formed in the parts 1 and 2. The sides 1c and 2c incline from the slot ends or shoulders 1t and 2t toward the tree ends of the parts 1 and 2.

The hinged part 2 is releasably locked, by means of a yoke 5, in its' operative position. The yoke 5 is guided in the slots 1" and 2e and is termed with aws 5EL for engagement with the inclined sides 1c and 2. A stem 5b having` one end thereof freely carried in a recess lia in the pitman is formed integral with the yoke. One end of a spring 6, disposed on the stem, engages a washer 7 also disposed on the stem and engaging the pitman 4, and the other end of the spring engages the curved portion of the yoke. The spring thus tends to move the yoke 5 to its operative position and tends to force the jaws 5a along the inclined sides 1c and 2c as shown in Figs. 1 and 3.

Assuming the parts 1 and 2 are in their operative position and it is desired to remove the ball 3 from the socket, the mode of operation is as follows. A tool (not shown) is engaged with the yoke 5 and with the edge 8a of a recess formed in a projection 8 carried by the part 1. By using the edge 8';L as a fulcrum on which the tool is rocked, the yoke 5 is moved7 against the compression of the spring 6, to its inoperative position in which the jaws 5a are disengaged from the inclined sides 1c and 2c. The hinged part 2 is then swung outwardly, by the application of a slight force against the rear extension 2b, to bring the slot end or shoulder 2f substantially into alinement with the jaw 5a adjacent thereto. The yoke is thus held in its inoperative position, as shown in Fig. 4. The outward swinging movement of the hinged part 2 is limited by a stop 2g which is so carried by the part 2 that it swings in a direction of rotation opposite to that of the part 2 and thus engages the rear extension 2b.

The socket parts are automatically reset by the spring 6 when the shoulder 2f is moved out of engagement with the end of the yoke jaw 5a. This may readily be accomplished by a slight tap against the outer side of the hinged part 2 to swing it towards the ball.

What we claim is:

The combination with a ball and socket joint including two relatively movable socket members for engaging the opposite sides of a ball, and a spring pressed rectilinearly sliding yoke normally engaging the members to force them towards one another to engage the ball, of a shoulder on one of the members adapted to engage an end of the yoke, when said members are spread apart, to hold the yoke out of operation, and a projection carried by and extended from one of the members to a position above the yoke to form a fulcrum for a tool adapted to engage the yoke whereby the yoke may be forced against the action of the spring to its shoulder engaging position.

Signed at Toronto, Canada, this 1st day of December, 1927.

BURTON S. HARRIS. HOWARD M. JOHNSTON.

Images