US1679707A - Pitman - Google Patents

Description

w. L. BROWN PITMAN Filed March 23, 1926 rv- 1 5 12: i U 5 1 1 I T i I: w 1 521 J6 ll 11 10 21 WJZIVZJ amnion Patented Aug. 7, 192 8.

UNITED STATES PATENT OFFICE.

WALTER L. BROWN, OF GBAVETTE, ARKANSAS.

PITMAN.

' Application filed March 23, 1926. Serial No. 96,787.

This invention relates to a pitman. I

It is generally aimed to provide a construction which is extremely durable and maybe readily adjusted to compensate for wear.

Another object is to provide a construction wherein the part subject to most wear may be metallic and the major portion or stock of which may be of wood in two pieces to accommodate a shim.

While the pitman is adapted for general use, it is especially designed to supplant present constructions used on headers and binders, harvester threshers and mowers, shaker arms of ordinary threshing machines, and the like.

One operative embodiment has been shown in accompanying drawings wherein: v

Figure 1 is a side elevation of the pitman; i

Figure 2 is a plan view thereof;

Figure 3 is a cross sectional view taken on the line 33 of Figure 1; and

Figure 4c is a view similar to Figure 2 with the parts disassociated and the stock without a shim. I Referring specifically to the drawings wherein like reference characters designate like or similar parts, the improved pitman is generally designated 10. It comprises a stock 11 preferably of wood and in two halves 11 as shownin Figure l to accommodate a shim 12 of wood, leather or the like when necessary to compensate for wear.

End sections are provided at 13 and 14.

. The greatest wear in use is againstthese sections and accordingly they are preferably made of metal, usually bronze.

Said stock 11 and sections 13 and 14 are held detachably but rigidly together by means of a'U-shaped bolt 15, disposed partially in grooves 16 and 17 provided externally on the stock 11 and section 13, respectively. Said-bolt passes through notches 12 in the shim to assist in holding the latter in place. The terminals of the bolt are screw threaded as usual and as shown and pass detachably through holes 18 in the section 14. Nuts 19 in pairs are secured on said terminals, one of each pair constituting a lock for the other.

In order to engage the wrist pins of machinery, the adjacent faces of the stock and sections are semi-circularly cut away to provide holes 20.

Oil may be supplied to the wrist pins or walls of said openings or holes 20 in any desired way as through diagonal holes 21 in the ends of stock 11.

In use the parts are attached by means of the bolt 15 to the wrist pins of the machinery,

the latter being accommodated in holes 20 as is obvious. The nuts 19 provide for an I adjustable connection. Wear in use will be slight on the metallic sections 13 and 14-. The wear, however, will be greater on the parts 11 about the wrist pin holes as is nown in practice, and in orderto take up this wear, the end Walls of the stock may be cut or filed so as to reshape them, even a number of times, and when necessary, the

I stock 11 may have one or more shims disvvide wrist-pin-engaging holes, a U-shaped bolt marginally surrounding one of said sections and said stock, the latter section and stock having. exterior grooves entered by the bolt, and the other section having holes accommodating terminals of said bolt, the stock being in sections, and a shim between the sections having notches engaged by said bolt.

In testimony whereof I aflix my signature.

WALTER L. BROWN.

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