US1237689A - Mowing-machine. - Google Patents

Description

c. PEARSQN.

MowlNG MACHINE.

APPLICATION FILED SEPT. 25| 1313.

Patented Aug. 21, 191,7.

3 SHEETS-SHEET I.

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C. PEARSON.

NIOWING MACHINE.

APPLICATION man SEPT. 25l |913.

Patented Aug. 21, 1917.

3 SHEETS-SHEET 2.

C. PEARSON.

MOWING MACHINE.

APPLICAHQN FILED SEPT. 25, |913.

Patented Aug. 21, 1917.

3 SHEETS-SHEET 3.

narran sraras serena orrion.

lEI-IARLES PEARSON, OF GHICAGO, ILLINOIS, ASSIGQ'OR 'TO INTERNATIONAL HARVESTER COMPANY OF NEW "JERSEY, A CORPORATION OF NEW JERSEY.

Moulins-Macallan.

Specification of Letters Patent.

Patented Aue". 21, 191'?.

`Application filed vSeptember 25, 1913. Serial 1t o. 791,774.

e exact specification.

My invention relates .to mowing machines, and in particular to the lifting llever mechanism whereby the operator may raise the finger bar to a vertical position, lthe associated parts =of the mechanism being operative in a manner to insure efficiency and durability.

The object of my invention is to provide an impro-ved semi-.automatic lifting lever mechanism' whereby the ordinary spring detent mechanism, which it is necessary for the operator to release `each time he moves the finger bar, may beeliminated. A further object of my invention lis to .provide improved semi-automatic lifting lever mechanism in which the parts are securely held in each position of adjustment without making it necessary for the operator to actuate the detent mechanism, this improved mechanism being simple in its nonstruction, having few parts, and positive ,and safe in operation. Theseand other objects of my invention will hereinafter appear. i

I attain these objects by means .of mecha n-ism, two embodiments of which are illustrated in the accompanying drawings.

In 4these drawings yFigure 1 is a top plan view of part of a mowing machine having my invention forming a part thereof;

Fig. 2 is aside elevation of Fig. 1; y

Fig. 3 is a view simi-lar to FigQ, upon an enlarged scale, and showing the finger bar controlling mechanism in various positions of adjustment;

.Fig 3; y.

FigsS is a cross section of the lifting lever l and designedl to show the manner of mounting the pawlv;

' F ig. 9 is a side elevation of part of .the lifting lever mechanism, showing a modified form of the locking pawl;

`Fi-g.g 10 is a front elevation of Fig. 9; and Fig. '1l is a side elevation upon an enlarged scale of the modified form of locking pawl,

designed to illustrate the manner in which it is mounted.

rIhe same reference characters designate like parts throughout the several views. l ,representsl part of the main frame ofl a mower, 2 the ydraft tongue, 3 the coupling bar, 4: the coupling yoke journaled upon the coupling bar, 5 the inner shoe hingedly connected with the yokemember and having secured thereto `the finger bar 6, the shoe being provided with a vertically disposed lever armi, and S represents a supplemental coujiiling bar having the stubbleward end thereof pivotally connected with the main frame and its opposite end withthe yoke member 4f. 9 represents a bracket member secured ,to the main frame and having a laterally projecting beaiing member 10 and a toothed sector l1 integral therewith. 12

represents a lifting arm journaled upon the bearing member 10,'the front side of said arm being connected with the lever arm 7r upon the shoe 5 by a common form of link mechanism 13. 14: represents a hand lever secured to the lifting arm l2 by means o-f a bolt 15 eccentric to rtheaXis of the lifting arm, the lever being permitted a limited rotary movement independent ofthe arm in opposite directions. 16 represents a` preferred form of gravity ypawl member that isy freely rotatable upon 'an singularly adjustablefeccentric bearing block 17 that is se-v cured between the hand lever 14 and a'strap member 18 by means of a bolt 19 of rectangular cross section seated in said members. As shown, one end of the strap 18. is secured to the hand 4lever adjacent said sector and its opposite end to the lifting arm 12 by means of the bolt 15. The pawl 16 engages with the toothed sector 11 when the lever 11i is moved rearward to raise the cutting rapparatus, and it is so adjusted by means of the eccentric bearing block ITthat it will sustain the weight of the cutting apparatus; but whenthe operator moves the lever forward to lower the cutting apparatus, it will turn about its axis and be released from the seetor. It is also to be noted that, although the location of the axis of the arm 12 relative to the axis of the pawl 16, and the line through the point of engagement of the pawl with the sector issuch as to securely lock the pawl against any force. that may be applied to the arm when the cutting apparatus is in a raised position, since the axis of the hand lever 14 relative to that of the pawl, and the point of its engagement with the sector' is nearly in the saine line, a little y force applied to the hand lever in a forward direction w-ill easily raise the arm 12 slightly and thereby release the pawl and permit the arm 12 to turn downward about its axis. 28

a represents a modified form of locking pawl provided with a cam slot 29 at the head thereof that receives a stud member 30 that is received by a longitudinally arranged slot 31 in the hand vlever 14. r1`he stud member 30 is' provided with a laterally turned threaded portion 32 disposed parallel with the handlever and received by an opening in a bracket member 33 secured to the hand lever 14, and 34 represents adjusting nuts whereby the stud member 30 may be adjusted along the slot 31 in a manner to control the operative positionof the pawl 28 relative to the toothed sector 11.

2O represents a foot lever having its front end connected with the rear end of the liftingarm 12 by means ofthe pin 21 in a manner permitting the lever to have a limited swinging movement upward relative to the lifting arm. 22 represents a camshaped lever pivotally mounted upon the sector 11 and adapted to swing in a vertical plane, the lower end being pivotally connected with the. front end of a link 23, the rear end Vof the link being provided with a longitudinally disposed -slot 24 whereby i said link is slidably connected with an arm 25 secured to the clutch tripping rock shaft 26, the shaft 26 being operatively connected with the clutchl mechanism (inclosed in the 4frame 1) in any preferred manner. 27 represents a depending stop member secured to the main frame of-'the machine and adapted to contact with the coupling bar 3 `when said bar has been raised to a predetermined height. The pin 21 is provided with a roller 22 which, when the lever 14A is moved rearward from the full line position shown in Fig. 3 and before it reaches the dotted line position shown in that figure,

- yengages with the cam lever 22 in amanner tov swing it about its axis in a direction to disengage the clutch mechanism when the hand lever has reached a predetermined limit of its rearward movement in raising the finger bar; but when the hand lever is moved forward to permit the finger bar to swing. outward and downward to an operative position, the roller 22 on the pin 21 in rig. 7.

will engage with the cam lever 22 above its axis and rswing said lever in a direction to permit the clutch mechanism to become operative as a driving element in transmitting motion to the cutting apparatus when the finger bar has reached a predetermined angle of inclination in a downward direction.

It is to be noted that in both forms of the construction shown herein, means are provided for adjusting the operative position of the pawl so that the lifting effect of the mechanism upon the barmay be regulated and its wear maybe takenup. In the form of my invention shown in Figf, I accomplish this by adjusting the adjustable eccentric 17 angular-ly with respect to the angular bolt 19, four positions of adj ustment being obtainable, another position of adjustment of this eccentric being shown In the form of my invention shown in Fig. 9, I obtain this same adjustneit by adjusting the threaded connection From the foregoing it is seen that the construction, operation and advantagesof the herein described invention will be apparent to those skilled in the art vwithout further description, and `it will bel understood that various changes in the size, shape, proportions and minor details of construction may be resorted to without departing from the spirit of my invention.

lVhat I claim as my invention, and desire to secure lby Letters Patent, is:

1. In combination, lever mechanism including a lever movable about its pivot but held against longitudinal displacement relative toits pivot, a sector, and a depending swinging pawl pivoted on said levery and engaging said sector,`v said pawl being releasable therefrom upon movement of said lever in opposite directions about its pivot.

2. In combination, a frame, an adjustable lever pivoted thereon, a sector carried on said franie, and eccentrically mounted pawl mechanism carried 'by said leverand en-L gaging said sector releasable therefrom upon movement of said lever about its pivot;

3l In combination, a frame, an arm pivoted thereon, a lever pivoted to said arm, a sector o'n said frame, and pawlmechanism between said sector and lever releasable upon movement of said lever in oppositedirec-` tions and normally locking said arm against movement in one direction.

In combination, a frame, an arm pivoted thereon, a lever operatively connectedv to said arm and held against longitudinal displacement relative to its pivot, a sector on said frame, and an automatically locking and unlocking connection controlled by said lever and between the'same and said sector sustaining said arm in a predetermined position. I

5.1In combination, aframe, a lifting arm pivoted thereon, Aa lifting leverivpivoted on said armin front Aofthe pivot lof said arm -on vthe frame, andmeans engageable with said lever and limiting the movement thereof whereby upon movement of said lever saidarmisraised. i

(S. Inrcombinatioina frame, alifting farm pivoted thereon, a lifting lever pivoted'to said arm, a notched sectorcarriedv on said frame, and means including a pawl'pivoted on said 'lever and received'in a notch in .said sector wherebyuponmovement of said lever said arm is raised. f

7. 1n combination, a frame, a lifting arm pivoted thereon, a lifting lever :pivoted on said arm, a notched sector onifsaid'frame,- a pzmilpivoteclon saidvllfever engageable with said sector, 'and means whereby upon movement of said lever in either ydirection said arm is raised.

S; In combination, a frame, a lifting arm pivoted thereonand `projecting forward from its pivot, a lifting lever pivoted. on said arm at a `point :be-low. and in frontrof the pivotv of ysaid arm, a sector carried on said frame and extending above the pivot of `said lifting arm, .and ."a pawl vcarried on said lever above its pivot and engaging with said sector.

9. In combination, -;a frame, a lifting arm pivoted thereon and projecting forward from i'ts'pivot, a lifting lever pivoted on said arm at a point below and in feront of the pivot of -said arm, a sector carried on said frame and extending above the pivot of said lifting arm, ra pawl carried on said lever :above its pivot and #engaging with said sector, and means for varying the operativeposition of said pawl.

10. A mowing machine including, in combination, a mower frame, a risingA and falling coupling frame operatively connected thereto, a linger bar hinged to said couplingv frame, means for swinging said bar to a substantially vertical position compris-A ing a hand lever operatively connected to -said coupling frame and bar, a notched sector, and means including a pawl pivotally mounted upon said lever and engageable with said sector for sustaining the weight of said coupling frame and said linger bar, and operative connections between said lever and said mower frame whereby said pawl is released from said sector and turned on its axis when said lever is moved in a direction to lower said coupling frame and finger bar.

l1. A mowing machine including, in combination, a mower frame, a rising and falling coupling frame operatively connected thereto, a finger bar hinged to said coupling frame, means for swinging said bar to a substantially' vertical position comprising a hand lever operatively connected to said coupling frame and linger bar, av notched sector, and means including a pawl pivot- -al'ly mounted vupon said lever and engagea-ble with said" sector for sustaining the weight Vof said coupling frame and said linger bar, and operative connections between said lever and said mower `frame whereby said pawl is turned axially when said lever is moved in a direction to lower the'finger bar and coupling frame.

' lf2; 'In combination, a pivoted thereon and adjustable in a plurality of positions with respect thereto, a lifting lever pivoted to said arm, a sector carriedon said frame, a pawl pivotally connected to said lever engageable with said sector for retaining said arm in its different positions of adjustment, and'adjustable operative connections between said pawl and saidwlever whereby the positions of adjustment of said .arm be varied.

i3. A mowing machine including, in combination, a rising and falling coupling frame, a fingerbar hinged thereto, means for swinging said bar to a substantially vertical position comprising a hand lever, a notched sector, and means -including a pawl pivotally mounted upon said lever and engageable with said .sector 'for sustaining the f weigh-t of `said coupling 'frame and said n- `tively-connected to said coupling frame and finger bar, a notched sector, and a pawl pivotally mounted upon said lever and engageable with said sector to sustain the weight of said coupling frame and said finger bar, and means for adjusting the axis of said pawl frame, a lifting arml relative to the aXis of said lever, said means comprising an eccentric bearing member having said pawl journaled thereon.

15. A mowing machine including, in combination, a rising and falling coupling frame, a. finger bar hinged thereto, means for swinging said bar to a substantially vertical position comprising a pivoted lifting arm, a notched sector concentric with the axis of said arm, a hand lever pivoted upon said arm eccentric to its axis, and means including a. pawl pivotally carried by said lever and engaging said sector, for locking said coupling frame in a raised position and automatically releasing the same when the hand lever is moved in a direction to lower said linger bar.

1G. A lifting lever mechanism having, in combination, a pivoted arm having means whereby it may be connected with the weight to be raised or lowered, a lever pivotally connected with said arm, a toothed sector concentric with the axis of ysaid arm, a pawl pivotally carried by said leverand engageable with said sector to sustain a weight, the

, axis of the second lever being eccentric with 'ondary frame, a lever for raising and lowering said secondary'frame, and means provided with and including a plurality of pivots yfor `connecting `said rlever to said main frame, said pivots being so located with relation to each other and to the main and secondary frames that the secondary frame must first be raised before the same can be lowered.

18. In combination, a mower frame, a rising and falling coupling frame, a lever for raising the latter, -and means coperating with said lever and operatively connected to said mower frame and utilizing the weight of said coupling framefor locking the same in raised position, said means being releasable from locked position upon movement of said lever'in either direction.

19. In combination, a mower frame, a rising and falling coupling frame, a lever for raising and lowering said coupling frame, means cooperating with saidv lever and mower frame for sustaining the weight of said coupling frame and for locking said lover against movement in a certain direction, and. operative connectionsbetween said Copies of this patent may be obtained for lever and said mower frame whereby movement ofsaid lever in said direction after the 'same has been locked `will lift said coupling frame and release said locking means.

20. In combination, a mower frame, a sector secured thereto, a rising and falling coupling frame, a lever for raising and lowering said coupling frame, a pawl operatively connected to said lever and coperating with said sectorl to sustain the weight of said coupling frame and `lock the lever against movement in one direction, and operative connections between said lever and said mower frame whereby movement of said leverin said direction will lift said coupling frame and release said pawl.

2l. In combination, a mower frame, a

y rising and falling coupling frame, a sector on` said mower frame, means' coperating with said sector and including a lever and pawl for raising said coupling frame and sustaining the weight thereon, the weight of said coupling frame locking said lever and pawl in position, and operative connections betweeny said lever and saidrmower frame whereby the movement of said lever in. either direction after the pawl is locked will lift said coupling vframe and release said pawl. e

. Intestimony whereof I affix my signature, in the presence of two witnesses.

CHARLES PEARSON.' Witnesses: v

yRAY PA'rirIsoN,

ve cents each, by addressing the Commissioner of Patents, Washington, D. C. l

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