US220878A - Improvement in pitman-connections - Google Patents

Description

S. SHIFLETT. Pitman-Gonneotion.

WITNE INVENTOR iii [Mo ATTORNEYS.

I'LPETERS. PHDYO-LITHOGRAPHER, WASHINGTONv D C,

UNITED STATES PATENT OFFICE.

SAMUELSHIFLETT, OF NORTH RIVER, VIRGINIA.

IMPROVEMENT IN PlTMAN-CONNECTIONS.

Specification forming part of Letters Patent No. 220,878, dated October 21, 1879 application filed April 7, 1879.

To all whom it may concern:

Be it known that I, SAMUEL SHIFLETT, of North River, in the county of Rockingham and State of Virginia, have invented a new and Improved Pitman-Oonnection, of which the following is a specification.

My improved pitman-connection is especially adapted for use in connection with machinery for harvesting; where the reciprocation is other piece, to connect the pitman therewith.

The forked ends are retained in place by a transverse screw and set-nuts.

In the accompanying drawings, Figure 1 is v p a top view of a pitmanconstructed in accordance with my invention. Fig. 2 is aside view. Fig. 3 is a cross-section on line new of Fig. 1. -Similar letters of reference indicate correspondin g parts.-

The pitman A is formed with forked ends a a, adapted for being sprung apart to a limited extent. At the outer end and on theinner side each forked end a is formed with a pointed or conical lug or projection, b.

"The position of ends a is adjustable by means of a screw, 0, that is attached to one end a a, and extends through the other end a, which latter is clamped by set-nuts d d at opposite sides. The'nuts d are prevented from turning by spring-pawls c e, attached upon the pitman, and engaging with nuts d. The nuts are, preferably, octagon, to allow of accurate adjustment and retention by the pawls.

The piece f represents the cutter-head of a harvester. It is formed with a cross-aperture, flaring at both ends, to correspond with the lugs b, which enter the aperture, as shown,

thereby making a firm-jointed connection between the pitman and cutter-head. This connection can be accurately adjusted by the screw 0 and nuts 01, and wear readily, compensated by tightening the forked ends of the pitman. I

A small oil-hole, t, in bar f communicates with the aperture in f and points of logs b, and oil will be retained upon the bearing-surfaces longer than in ordinary connections.

The form of pitman-connection maybe used to advantage on all kinds of machinery wherein power is communicated by a rod froma crank to convert circular to reciprocating motion, or vice versa-as, for instance, reapers and mowers, engines, sewing-machines, 866.

It is evident that the position of the conical lugs and recesses may be reversed, the lugs placed on the piece f and sockets on the forks a. In some instances, instead of being conical or tapering to a point, the lugs b may-be of rounded or spherical form.

Having thus described my invention, I claim as new and desire to secure by Letters Patcut- 1. The combination, with a pitman having two lugs, 11 b, on spring-arms a, of the cutterhead f, having a hole, '5, and subjacent oilchamber between two opposite cavities corresponding to said lugs, as and for the purpose specified.

2. The polygonal nuts (Z d on bolt 0, combined with spring-bars e, havingforked ends that fit over said nuts, as shown in Fig. 2 of the drawings, and for the purpose described.

SAMUEL SHIFLETT.

Witnesses:

P. BURGESS, HENRY W. ROLLER.

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