US326887A - Pitman - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

C. P. SEARCH.

PITMAN.

Patented Sept. 22, 1885.

(No Model.)

2 Sheets-Sheet 2. C. I'. SEARCH.

PITMAN.

Patented Sept. 22, 1885.

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CASPER F. SEARCH, OF VVINONA, MINNESOTA.

PITNIAN.

SPECIFCATION forming part of Letters Patent No. 326,887, dated September 22, 1885.

Application filed July 21, 1885. (No model.)

To @ZZ whom it may concern:

Be it known that I, CASPER F. SEARCH, a citizen of the United States, residing at Winona, in the county of Vinona and State of Minnesota, have invented certain new and useful Improvements in Pitmen; and I hereby declare the following to be a full, clear, and exact description of the same.

My improvement relates to the pitman used upon harvesters, reapers, and mowers for the purpose of connecting the knife or sickle portion with the mechanism which actuates the same through the medium of the pitman; and

. it relates particularly to the joint affording the immediate connection between the cutting mechanism and pitman, and to means provided at the opposite extremity of the pitman to insure stability ofthe nuts employed in securing together the parts forming the ballbox to receive the ball constituting` the usual ball-and-socket joint.

It is my object to provide a perfectly-operating and readily-adjustable eye or joint for a pitman and knife or sickle connection; and it is also my object to provide means for preventing the loosening with the use ofthe machine of the nuts employed upon the ball-box.

To these ends my invention consists in the general construction of the parts forming my improvement, and in certain details of construction and combinations of parts forming the same, all as hereinafter more particularly set forth.

Referring to the drawings, Figure l is a transverse section through the cutter-bar of a mowing-machine, showing in front elevation the joint of my improved construction for connecting the pitman and cutting mechanism; Fig. 2, a perspective view of a washer of particular construction; Fig. 3, a broken plan view of a portion of the cutting mechanism of a mower, showing my improved joint for connecting therewith the pitman; Fig. 4., a scctional side elevation ot' the ball box on the pitman provided with nuts secured in position by means of my improved washer; Fig. 5, a sectional front elevation of the same; Fig. 6, a longitudinal sectional view of the joint, showing the oil-hole; Fig. 7, a sectional View of a detail; Fig. 8, a longitudinal sectional view showing a modification of thejoint; Fig. 9, a cross-section of the same, showing another modification; Fig. 10, a similar View to that illustrated in Fig. 8, showing another modification; Fig. 11, a side elevation of a detail employed in the modified construction of the joint shown in Fig. 9, and Fig. 12a longitudinal sectional view of a detail employed in the modified construction of the joint shown in Fig. S. o

A is a pitman-rod, provided at its upper extremity with a ballbox, B, oi' common construction, the parts of which are held together .by nuts t upon the threaded arms s ofthe pitmannvhich support the ball-box, and are connected toward their upper extremities by means ot'a washer, C, provided with openings toward its opposite extremities to admit the arms s ofthe pitman, and is clamped in position by means of nuts t. Toward its center, and upon opposite sides of the same,the washer C is stamped out to produce downward-projecting lugs 1,which abut against the adjacent nuts t and prevent their rotation, and consequent loosening. This device overcomes the great trouble hitherto experienced of the loosening ofthe nuts by the jarring produced in the use of the machine. The lower extremity of the pitman is provided with a head, D, having formed transversely through it an eye, D, countersunk, asshown in Figs. 6 and 8, on opposite sides, and provided with an opening, a', through which to introduce the oil for purposes ot' lubrication.

E is the knife-carrying plate, having slides or guide-flanges!) on opposite sides ofthe knife, and provided with lugs p and o, having openings in line with each other to receive the screwcenters hereinafter described, forming pivotal connection for the pitman.

F is a screw provided at one extremity with a head, and cone-pointed toward its opposite extremity, and F is a similar screw, differing from the screw F in the matter of its length, which is shorter. rlhe pitman-joint is formed by inserting the head D between the conepointed ends of t-he screws F and F, which operate within the lugs p and o, and causing the points to enter the countersunk eye D.

Various modifications of the screw F may be used; but to prevent loosening of the form shown in Figs. 6 and 7 the lugp may be split, as clearly illustrated in Fig. 7, anda set-screw, p', employed as the securing device against IOO loosening; and the same construction of lug and set-screw is employed for the same purposeif a hollow screw, F-such as is shown in Figs. 8 and 12-is used.

The hollow screw-center F affords a very desirable oilcup, closed at its extremity by means of a screw-plug, n, ot' cork, Wood, or metal, and when used there is of course no necessity for the provision of an oil-hole, x, in the head D of the pitman-rod.

The screw F (shown in Figs-9 and ll) is provided with longitudinal grooves y, into which, to secure it against loosening, a set-screw, p, enters, being inserted through the lug p, the split portion of which may, with this modification ofthe screw, be omitted.

Still another means of securely fastening the screw F in position without the employment of the split lug and set-screw is represented in Fig. l0 ofthe drawings, wherein is shown for the purpose a lock-nut. m.

Vhat I claim as new, and desire to ysecure by Letters Patent, is-

l. ln a pitman-connection, the combination, with the rod, of a countersunk eye on the end ofthe 1'od,and cone-pointed screwcenters slipported in bearingsin line with the countersunk eye, substantially as described.

2. ln a pitman-connection, substantially as described, the hollow cone-pointed screw-center F, constructed and arranged to operate as and for the purpose set forth.

3. The pitman-connection,having the countersunk eye on the pitman,hollow cone-pointed screw-center F, forming an oil cup, and conepointed screw-center F,both screw-centers being supported in bearings in line with the countersunk eye on the pitman, substantially as described.

4. The pitnian-connection having the countersunk. eye on the pitman,hollow cone-poi-nted screw-center F, provided with a stopper, p, and forming anoil-cup,andcone-pointedscrewcenter F', both screw-centers being adjustable and supported in bearings in line with the countersunk eye on the pitman, substantially as described.

5. The connection for the pitman and cutting mechanism of a harvesting-machine, comprising, in combination, the plate E, for carrying the cutting mechanism, and provided with slides or guide-flanges q at the front and back of the knife, and a perforated split lug, p, having a set-screw, p', and a perforated lug, o, cone-pointed screw-centers adjustable within the lugsp and o, and a pitman, A, provided at one extremity with a head, D, containing an eye, D', countersunk upon opposite sides to receive the points of the screw-centers, substantially as described.

The combination,with the ball -box on the pitman-rod and nuts t, of a washer, C, provided with lugs fr, abutting against the nuts to prevent their turning, substantially as described.

7. The pitman A, provided at one extremity with la ball-box, B, having its parts secured together by means of nuts t, a Washer, C, provided with lugs r, in contact with the nuts t, to prevent theirturning, and ahead, D. at the opposite extremity of the pitman, containing an eye, D', countersunk on opposite sides, in combination with the plate E, for carrying the cutting mechanism, provided with adjustable cone-pointed screw-centers F and F, to engage with the eye D in the head D, substantially as and fir the purpose set forth.

CASPER F. SEARCH.

In presence of- C. L. BONNER, J. L. MILLAR.

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