US1174324A - Pitman connection. - Google Patents

Description

J. W. KAYS.

PITMAN CONNECTION.

APPLICATION FILED nor. 6, 1913.

1,174,324. Patented Mar. 7 191 6. Y

- 26 '51 H H 1} H h ll 2 v I 7 9 22 3 2! [I 46 7 THE COLUMBIA PLAYIXOORAPH cm, WASHINGTON, D. c.

I JOSEPH W.jKAYS, or EUGENE, OREGON.

PITMAN CONNECTION.

Application filed October 6, 1913; Serial No. 793,646.

To all whom it may concern:

Be it known that I, JOSEPH W. KAYs, a citizen of the United States, residlng at Eugene, in the county of Lane and State of Oregon, have invented certain new and useful Improvements in Pitman Connections, of which the following is a specification.

This invention relates to pitman connections and while the connection embodying the present invention is designed primarily for use with the head of a' knife bar of a mowing machine, it is not limited to such use but may be employed in various mechanisms.

The invention aims to supply a novel connection between the pitman and the knife.

head of a mowing machine, thereby admitting of the coupling and uncoupling being readily effected and the joint automatically compensating for wear and variations, so as to obviate looseness and rattle and to insure positive movement of the knife bar without any play or lost motion,-which is objectionable for various reasons.

Theinvention is designed more particularly as an improvement on the pitman connection shown in Patent No. 935,140, issued September 28, 1909, to W. L. Chrysler and myself, one feature of improvement residing in the provision of means for varying th leverage which may be brought to bear when the socket members of the connection are closed about the head of the knife bar or other element to be driven, the connection being in this manner adapted for employment with knife bars of various types and having different sizes of heads and being further better adapted to compensate for wear. 7

In the accompanying drawings: Figure 1 is a plan view of the connection embodying the present invention. Fig. 2 is a horizontal section tlierethrough. Fig. 3 is a transverse sectional view of the line 33 of Fig. 2. Fig. 4 is a perspective view of the fulcrum for the lever which is provided for closing the socket of the connection. Fig. 5 is a perspective view of the socket members detached.

In the drawings the pitman proper is indicated by the numeral 1 and the connection therefor consists essentially of two socket members, one indicated by the nu- -meral 2 and the other by the numeral 3. 1 These socket members are provided with at.-

Specification of Letters Patent.

Patented Mar. 7,1916.

taching portions or shanks 4 secured to opposite sides of the pitman 1 by rivets or bolts 5 in the manner clearly illustrated in Figs. 1 and 2 of the drawings. The member 3 is relatively rigidbut, as will be observed from an inspection of Fig. 2, the member 2 is sprung slightly'from that side of the pitman 1 to which it is connected, as

indicated at .6, so that it will possess the desired degree of resiliency adapting it to besprung toward the socket member 3 in order to close the socket members about the ball member of the connection which is indicated in general by the numeral 7. The members 2 and 3 are formedrespectively attheir ends which project beyond the end of the pitman 1, with sockets or cupped heads 8 and 9, the concave sides of which are, of course, presented toward each other. The member 2 is formed with a slot 10 and with a bail 11 extending transversely of the slot. This bail 11 constitutes a connection for the closing lever of the device as will be presently explained.

g The socket member 3 -is formed directly opposite the slot. 10 with a slot 12 and the lever above mentioned and indicated inthe drawings by the numeral 13, has an angularly' extending end portion 14 terminating in a hook 15, the portion 14 being inserted through the slots 12 and 10 and the hooked end 15 being engaged with the bail 11 in the manner clearly shown in Fig. 2.

The body portion of the lever is provided with a handle portion 16 which is tapered in the direction of its free end whereby it'will possess the desired degree of resiliency and the said portion is formed at its extremitywith a short bend 17 over which may be engaged a keeper yoke 18 pivoted as at 19 at'that side of the pitman opposite the side adjacent to the handle portion of the lever, as shown in Fig. 1, it being understood that the keeper yoke servesto hold the lever when the latter is swung to close the socket of the connection.

trated in Figs. 2 and 4 of the drawings and is preferably in the nature of a yoke freely slidable upon the body portion of the lever, the opposite sides of the yoke, indicated one by the numeral 20 and the other by the numeraL21, constituting the fulcrum portions upon which the lever is to be rocked. It will be obselVfid that the portion 20 is of less The fulcrum for the lever is clearly illus-- height than thejportion 21" and it} may here be stated that the yoke is reversible up'oiithe lever as well as slidable thereon so either of its said portions 20 0i Q-Pinaybe' positioned between the body portion of the lever and theouter side of the socket meni her 3, depending upon the degree of: leverage desired to be secured; In orden't'ha't" the yoke when adjusted upon the lever may be held against accidental displacement, that side of the body portionof the lever' which is presented toward the socket" memberB' is formedwitha series of notches 22 inwhich the-fulcrum portions20'or 21 may be inter changeably engaged. Inasmuch as the notches 22 extend in aseries lengthwise of the body portion of the lever it will be u'n derstood I that by adj usting the yoke toward the endlt of the lever the'levera'gemaybe increased and it will also be 'understoddth'at when the" fulcruni' portion" 20' is in position"- between the lever and the socket member 3; the leverage will be less than" whenthe'por tion 21 is so positioned? It will be under stood, therefore, that by" reversing: and slid: ably adjusting the ful'CIUHF yoke shown in Flgkl, upon the'bo'dy portion ofthelever, this degree of adjustment ofleverage may be secured-and the socket members may, there-- fore, be caused to gripthe head 7' o'r other element" with which they are engaged,- with exactly the desired degree of firmness andwithout so binding as to rende-r't'heconnec'-' tion stiff, or so loose as to'permitof rattling? While the employmentof a fulcrum such as'shown in Fig. 4, adjustabl'e asshownand described; will allow of considerable latitude" of adjustment of leverage and therefore? adaptthe connection for use with heads of Various SlZG'S',lt will at times befoiind d6? sirable' or necessary to secure" a finer ad justmentf than canbe obtained by the useof said fulcrurni For this purpose there is provided an adjusting screw*23"adji1s'tahly threaded throughan openingeriatm mam: her 3 and adapted to serve" asa fulcru riifor the lever, this screw being pr'oyi ded at its" end, which islocate'd hetween the masters QTan'd 3; witha head 25'by nieans'ofwliichit' 'm'a-y be adjusted and having" threeded uponit a set nut 26' which may be tightehed to hold it at ustment; By the use of this screw" it will be apparent that a fiiie degree of adjustment can be secured so that the headfl'i will he engaged with exactly the desird'degreeof firmness.

It will be understood that the connection is equally well adapted for a new head or for a head that has been in use and whose bearingniember has become worn. It will he'apparent that when the link is disengaged frointhe lever, the socket member's-willautomaticall'y-"separa-teor spread, thereby releasing the ball 0]": the bearing member and admitting of the pitin'an being: quickly and easily disconnectedfrom the knife head.

Havingithusdescribed the invention; What yondthe outer- 'side of 'the mernber in which it firs-mounted:

2; In a pitman connection, socket mem hers, one of Sand. members being provided with a bair extending transversely of a" slot therein, the other member being:- formed with sloti, a lever for closing: the socket members having an angular heoke'd end. in

serted" tlirduglf the slot" in the secondmen tinned member and engaged with the said bail, Ine reiiiova'hly' "engaged "with the end of the le'ver fohh'oldin'g the saine'in position beside the' s'e'eond n'rientioned member,- and a screwflthreadjed through theseeond mentioried' member" and bearing at its" end against-ans inner side of" the lever' near the hooked ericl thereof, the head end' of the screw being-housed between the said" members.

Tfites titiieny whereof I signature in presence of two witnesses.

JOSEPH w; KAYS'. [Li a] Witnesses? L J,:. A v Fo o'n'riflny G. Di

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