US1157857A - Corn-harvester. - Google Patents

Description

e. A. FARRALL & c. MAUL.

CORN HARVESTER.

APPLICATION FILED JUNE 1 I914- CoLqMmA PLANOGRAIH co.,wAsH|NnroN. D. c.

Patented Oct. 26, 1915.

3 SHEETS-SHEET l- ATTBRNEY5 Patented Oct. 26, 1915.

3 SHEETS-SHEET 2.

G. A. FARRALL & C. MAUL. CORN'HARVESTER.

APPLICATION FILED JUNE 19. 1914. 1,15%857.

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ENTERS hYfZLQ M ATTEIRNEYEJ G. A. FARRALL & C. MAUL.

CORN HARVESTER. APPLICATION FILED JUNE I9. 1914.

Patented Oct. 26,

INVENTEIRS HTTEIR NEYE! COLUMBIA PLANOGRAPH 00.. WASHINGTON. b. c.

FEED @TAFE% PATENT @FFlFlE.

GEORGE A. FARRALL AND CHRISTIAN MAUL, 0F BATAVIA, NEW YORK, ASSIGNORS TO THE JOHNSTON HABVESTER COMPANY, OF BATAVIA, NEW YORK, A CORPORATION OF NEW YORK.

CORN-HARVESTER.

Application filed June 19, 1914.

T 0 all whom it may concern:

Be it known that we, Gnonen A. FAnnALL and CHRISTIAN MAUL, citizens of the United States, residing at Batavia, in the county of Genesee and State of New York, have in vented new and useful Improvements in Corn-Harvesters, of which the following is a specification.

This invention relates to corn harvesters and more particularly to a machine of the character which is 1 shown and described in Letters Patent of the United States #tiol'fiol, granted September 11, 1900. In the machine of this prior patent the needle and knotter of the binder mechanism are mounted so as to be capable of vertical adjustment for adapting the binding mechanism to gavels or bundles of corn of varying length, this mechanism being so organized that the adjustment of the knotter mechanism required dismembering of a considerable number of parts of the machine, thereby suffering loss of time and inconvenience. Furthermore, in this prior patent the needle and knotter mechanism were adjusted verti cally independently of each other so that separate manipulation of these parts was necessary. The organization of this prior adjusting mechanism was also such that the needle and knotter mechanism could only be shifted into one or the other of two positions for adapting the binder mechanism either to short or tall corn, no provision being made for shifting the binder mechanism to an intermediate position for the purpose of adapting the same to corn of medium length.

Furthermore, in this prior machine the.

bundle of grain was not firmly supported adjacent to the needle and knotter and the relative position of the needle and knotter during the tying operation was liable to be disturbed by the strain on these parts so that the tying mechanism was liable to be cramped or miss a bundle.

One of the objects of this invention is to provide simple and efficient means whereby the needle and knotter mechanism may be quickly, accurately, and conveniently adjusted relatively to each other when assembling the machine.

Another object of the present invention is to provide means for adjusting the needle and lrnotter mechanism vertically simultaneously so that after these devices have been once set up in a definite relative 'posi-= Specification of Letters Patent.

Patented Oct. 216, 1915..

Serial No. 846,083.

tion the same will always be retained in this position regardless of whether the needle and knotter mechanism are raised or lowered.

A. further object of this invention is to so organize the needle and lrnotter adjusting mechanism that the same can be shifted vertically to any position between two extreme limits for which this adjusting mechanism is designed, thereby enabling the binder mechanism to properly tie the band, twine or cord around bundles of corn which may vary considerably in length.

This invention has the further object to provide a firm and reliable support for the bundle immediately adjacent to the needle and lmot'ter during the tying operation, and to provide means whereby the needle and knotter mechanism are reliably held in the proper relation to each other during the tying operation notwithstanding that these parts may be under strain and thereby avoid cramping of the tying mechanism and 1 also preventing imperfect tying or missing of a bundle.

In the accompanying drawings: Figure 1 is a side elevation of a corn harvester embodying our improvements, the same being viewed from the grainward side of the machine. Fig. 2 is a fragmentary vertical transverse section thereof, on an enlarged scale, taken in line 22, Fig. 1. Fig. 3 is a fragmentary horizontal section taken in line 33, Fig. 2. Fig. 1 is a fragmentary vertical section taken in line Jr-t, Fig. 3. Fig. 5 is a horizontal section taken in line 5-5, Fig. 2. Fig. 6 is a detached perspective view of the vertically movable slide or carriage forming part of the needle adjusting mechanism. Fig. 7 is a detached section view of the screw sleevefor adjusting the needle and lrnotter mechanismrelatively to each other. Fig. 8 is a fragmentary vertical section, on an enlarged scale, taken in line 88, Fig. 1. Fig. 9 is a fragmentary horizontal section taken in line 9-9, Fig. 1, looking upwardly. Fig. 10 is a rear elevation of the machine. Fig. 11 is a horizontal section taken in line'11*11, Fig. 10. Fig. 12 is a rear elevation, on an enlarged scale, of the knotter mechanism andthe needle cooperating therewith in section.

Similar characters of reference indicate corresponding parts throughout the several views. r

1 represents the main frame of the corn harvester which may be of any suitable construction to support the various movable parts of the machine and which is supported on the ground while being hauled over the same by means of wheels in the usual and well known manner. On the lower front portion of the main frame the same is provided with the usual cutter mechanism 2 whereby the corn stalks are cut ofi'during the forward movement of the machine. Arranged lengthwise on the main frame is the inclined conveyer platform 3 which extends rearwardly from the cutter mechanism on the stubbleward side thereof and has its lower portion nearer the grainward side of the machine while its upper portion is nearer-the stubbleward side of the machine. Extending rearwardly and stubbleward from the rear end of the conveyer platform is the inclined binder deck 4. This deck and the platform together constitute the stubbleward side of the passage or throat through which the stalks pass rearwardly through the machine after being severed by the cutter, the grainward side of'this throat or passage being formed principally by lon gitndinalbars 5 supported on the adjacent part of the main frame. In passing through the throat the corn stalks aresupported at their lower or butt ends by a bottom 6 extending rearwardly and upwardly along the rear part of the conveyer platform and the lower part of the binder deck. I

' The corn stalks are carried in an upright position through this throat from the cutter mechanism to the binder mechanism which is mounted adjacent to the binder deck by means of a conveyer mechanism which may be of any suitable construction but which preferably comprises a plurality of feed belts 7 having their operative stretches pass ing rearwardly through longitudinal slots 8 in the platform and binder deck and provided with feeding teeth or wings 9 which project laterally from these belts into the stalk passage or throat so that they engage and well known character and the same is therefore not shown in the drawings. This needle is mounted on an upright rock shaft 12 which is arranged on the under or rear side of the binder deck and journaled at its upper and lower ends in stationary bearings 13, 14 arranged on the adjacent part of the main frame. The needle is mounted on this shaft by means of a spline 15, as shown in Fig.11, or otherwise, so that the needle is compelled to rock with this shaft but is capable of sliding lengthwise thereon for the purpose of permitting the needle to be shifted vertically into different positions relatively to the bottom of the stalk throat. Various means may be provided for shifting the needle to any point between predetermined limits on its actuating shaft 12 for the purpose of adapting the needle to the length of the corn which is being bound. The preferred means for this purpose which are shown in the drawings comprise a carriage having a vertical guide sleeve 17 which is movable vertically on an upright stationary guide rod 18 arranged on the main frame adjacent to the needle shaft 12 and two arms 19, 2O projecting laterally from the upper and lower ends of the guide sleeve and provided with eyes or openings which receive the needle shaft 12 at the upper and lower ends of the hub of the needle, as shown in Figs. 2, 5, 6 and 11, whereby upon raising or lowering the carriage the needle will be compelled to move therewith. The vertical movement of the carriage and the needle associated therewith is preferably effected by means of an upright screw shaft 21 arranged in rear of the binder deck and parallel with the needle shaft and guide rod 18 and ournaled at its upper and lower ends in suitable bearings on the main frame while its intermediate part is provided with an external screw thread 22 which engages with a screw nut or internally threaded lug 23 formed on the lower arm of the needle carriage, as shown in Figs. 2 and 11. Upon turning the screw shaft 21 in one direction the needle carriage will be raised while upon turning this shaft in the opposite direction the needle carriage will be lowered. The turning of the screw shaft may be effected either b y applying a wrench of suitable construction to the squared upper end 24 of the screw shaft or by means of a hori zontal intermediate shaft 25 journaled transversely on the main frame underneath the throat bottom and connected at its inner end by intermeshing bevel gear wheel 26, 27 with the lower end of the screw shaft 21 while its outer end is constructed to receive a handle or crank 28, as shown in Figs. 1, 2, 3, 4 and 10 or other suitable device for turning the same.

The knotter mechanism may be of the usual and well known construction the parts shown in the drawings for locating the same comprising an upright knotter shaft 29 arranged opposite the face of the binder deck, a knotter frame 30 mounted loosely on the knotter shaft opposite the binder needle, upper and lower knotter cams 31, 32 arranged on the knotter shaft above and below the knotter frame, and a breast plate 33 mounted on the inner part of the knotter frame. The lower part 34 of the knotter shaft is arranged within an upright bearing sleeve 35, the connection between these parts being of such a character that the knotter shaft is compelled to turn with the bearing sleeve but is free to slide vertically therewith, this being preferably effected by making the lower part of the knotter shaft square in cross section and the bore of the bearing sleeve of corresponding form, as shown in Figs. 2 and 3. The bearing sleeve is journaled in an upright bearing or stand ard 36 mounted on the main frame and is held against vertical movement by means of a collar or flange 37 arranged at the upper end of the bearing sleeve and engaging with the upper end of the bearing 36 and a gear wheel 38 secured to the lower end of the bearing sleeve and engaging with the lower end of the bearing 36, as shown in Fig. 2. The knotter shaft, the bearing sleeve and the parts associated therewith may be turned in the proper direction for operating the knotter mechanism by any suitable means, for instance, by means of a horizontal driving shaft 39 journaled on the main frame below the throat bottom and provided with a bevel gear pinion 40 which meshes with the teeth of the gear wheel 38. By means of this connection between the knotter mechanism and the driving mecha nism it is possible to shift the knotter mechanism into any position vertically between its upper and lower limits to co-incide with the position of the needle, thereby enabling the binder mechanism to be located for properly binding bundles of corn stalks which vary considerably in length and still permit of placing the band at the most desirable place around the same. The vertical adjustment of the knotter mechanism may be accomplished by various means those shown in the drawings being suitable and constructed as follows: ll represents a vertically movable yoke provided in front of the knotter shaft with a downwardly projecting tubular shank 42 and at its upper end with a rearwardly projecting arm 43 having a sleeve 44: which receives the upper circular part of the knotter shaft between an upwardly facing shoulder as thereon and the underside of the lower knotter cam 32. This yoke is also provided with a forwardly projecting arm 46 having an upright guide sleeve 47 which is adapted to slide vertically upon an upright guide rod l8 arranged in front of the yoke and mounted at its lower end on the main frame of the machine. Upon raising or lowering this yoke the knotter shaft and the parts carried thereby are moved in the same direction but the knotter shaft and the parts mounted thereon are free to turn independently of this yoke. For greater stability the upper end of the knotter shaft turns and slides in a bearing 49 arranged above the knotter mechanism and supported by means of an arm 50 secured to the upper end of the guide rod l8 and projecting rearwardly therefrom, as shown in Fig. 1.

The front end of the breast plate 33 is adjustable horizontally so that the same may be moved toward and from the deck and thereby form a passage of the desired width for the stalks or grain immediately adjacent to the tying mechanism. The preferred means for effecting this adjustment which are shown in the drawings comprise a transverse adjusting rod 330 provided at its inner end with an upright pin 331 which pivotally engages a perforated ear or lug 332 on the outer side of the front part of the breast plate, a perforated lug or ear 333 arranged on the upper part of the guide sleeve l7 and receiving the outer threaded end of the adjusting rod 330 and clamping screw nuts 334-, 335 arranged on the screw thread of the adjusting rod 330 and engaging with opposite sides of the lug 333, as shown in Figs. 1 and 9. Upon turning the screw nuts 331 335 in the proper direction the breast plate may be adjusted transversely of the path of the grain or stalks to suit the character or condition of crop.

t its lower end the shank of the adjusting yoke is provided with an internal screw thread. which receives the external screw thread 52 of an adjusting screw sleeve 53 the latter being also provided with an internal screw thread 54 engaging with the external screw thread of an upright adjusting screw shaft The latter is journaled at its lower end in a bearing 56 on the main frame so as to be capable of turning in this bearing but incapable of sliding axially therein. The adjusting screw sleeve is normally held against turning on the shank of the yoke by means of a clamping screw nut 57 engaging with the external thread of the adjusting screw sleeve and with the lower end of said shank, as shown in Fig. 2. Upon turning the screw shaft in one direction or the other'the screw sleeve will be caused to ascend or descend and thereby raise or lower the yoke and the knotter mechanism connected therewith accordingly.

The lead or pitch of the screw threaded connection between the needle screw shaft 21 and the carriage and between the knotter screw shaft 55 and the screw sleeve 53 are preferably the same so that by turning these two screw shafts in unison either in one direction or the other, the needle and knotter mechanism will be raised and lowered in the same measure and always retained in the proper relative position. In order to thus move these two screw shafts in unison the lower end of the knotter screw shaft 55 ment is preferably efiected by turning the intermediate shaft by means of the crank 28. WVhen, however, the machine is working in the field and the operator is occupying the seat 60 which is adjacent to the needle,

this simultaneous adjustment of the needle and knotter mechanism may be effected by the operator applylng a crank, wrench or key to the upper end of the needle screw shaft 21 which is within convenient reach, thereby enabling the operator to adjust the binder mechanism with nicety to the particular size of corn stalks which are being harvested while the machine is running and without losing any time for this purpose.

The'lead or pitch of the screw threaded connection between the adjusting screw sleeve 53 and the shank of the yoke is comparatively small while the lead or pitch of the screw threaded connection between the adjusting screw sleeve 53 and the adjusting screw shaft 55 is comparatively large. It follows from this construction that upon turning the adjusting screw sleeve 53 relatively to the screw shaft 55 and yoke shank either in one direction or the otherthe differential in the pitch between these two screw connections will cause the yoke to be either raised or lowered on the screw shaft 55 while the latter is at rest. By this means the knotter mechanism may be accurately adjusted relatively to the needle and then thisv adjusting device may be securely locked against displacement by means of the clamp ing screw nut 57 so that thereafter the adjusting screw sleeve 53 practically forms an integral'part of the yoke causing the knotter mechanism and needle to rise and fall together upon turning either the adjusting shaft 25 by means of the crank 28 orby turning a crank applied to the upper end of the needle screw shaft 21.

It is desirable to provide means for posi- 'tively locking the tying mechanism in position after ad ustment so as to prevent accidental displacement and also permit of easily and quickly bringing the tying mechanism to a predetermined position. Although various means may be employed for this purpose those shown in the drawings are suitable and preferred and comprise a spring pressed lockin bolt or pin 4J0 guided in a socket 471 on the lower part of the guide sleeve L7 and adapted tobe yieldingly held by a spring 472 in engagement with one of a plurality of openings L73 formed in a row in the guide rod 4-8 and spaced. to correspond to the different position into which the tying mechanism is usually adjusted. By withdrawing the bolt L70 from an opening 478 and then moving the tying mechanism up or down until the same reaches the next position the bolt is automatically engaged with the next opening 473, thereby relocating the tying mechanism without requiring special attention for this purpose on the part of the operator.

In order to place the band properly around the bundle and with ease and certainty it is desirable to support the bundle firmly on its front or advancing side immediately adjacent to the tying mechanism during the tying operation. For this purpose means are provided which are preferably adjustable simultaneously with the tying mechanism and are constructed as follows: 60 represents an upright compressor shaft journaled in suitable bearings on the main frame parallel with the needle shaft and in rear of the same. 61, G2, 63 represent a plurality of compressor arms one of which ('31 is mounted on the compressor shaft in line with the tying mechanism preferably adjacent to the needle while the others 62, 63 are mounted on this shaft at different distances from the needle. The compressor shaft is adapted to be rocked by the pressure of the grain or stalks, against the compressor arms so as to start the tying mechanism with which it is operatively connected and which also serves to first swing the compressor arms out of the path of the grain or stalks and then back again across said path. By thus arranging one of the compressor arms in line with the needle of the tying mechanism the bundle is held firm at this point while being compressed and permits of properly placing the band around the same and with certainty. The lower compressor arms 62. 63 are preferably nonadjustable on the compressor shaft but the upper compressor arm 61 is capable of vertical adjustment lengthwise of this shaft so as to permit of always retaining this arm in line with the tying mechanism. purpose the upper compressor arm has its hub 65 provided with a square bore 66 which receives the upper square part 67 of the compressor shaft, whereby the compressor arm and shaft are compelled to turn together but the compressor arm is capable of sliding vertically on the compressor shaft. The tying mechanism and the upper compressor arm are preferably so connected that these parts always move up and down together and always remain in the same relative position. This is preferably accomplished by providing the hub of the upper compressor arm with two segmental coupling flanges 68, 69 which engage with the upper and lower For this 1;

ends, respectively, of the screw nut 23 of the needle carriage, as shown in Figs. 10 and 11. By means of this construction the com pressor shaft and its arms are free to turn independently of the tying mechanism but whenever the tying mechanism is raised or lowered the upper compressor arm is caused to move simultaneously therewith, thereby avoiding the necessity of separately adjusting the respective compressor arm.

Owing to the fact that the knotter mechanism is only supported on the lower part of the frame the knotter mechanism is liable to become displaced slightly relatively to the needle so that these parts become cramped and bind during the tying operation, particularly when operating on a large bundle or while harvesting on hilly or uneven ground which causes the knotter mechanism to whip or spring relatively to the needle. in order to insure a proper relative positioning of the needle and knotter mechanism during the tying operation, if the same should be slightly displaced, the following means areprovided: 100 represents a segmental retaining rib formed vertically on the needle preferably concentrically with the aXis thereof and on the upper side thereof and extending rearwardly from its point or front end, as shown in Figs. 5, 10 and 11. In the lower part of the knotter frame adjacent to the outer side of the knotter disk 101 the same is constructed to interlock with the needle as the latter passes through the knotter frame so as to hold the knotter mechanism and needle positively in their proper relative position both in a vertical direction and in a horizontal direction crosswise of the path of the stalks or grain. This interlock is preferably effected by providing the knotter frame with a main horizontal recess 102 which extends laterally outward from the motter disk and receives the main or body portion 103 of the point of the needle, and a vertical supplemental recess 104 which extends upwardly from the upper wall or side of the main recess and receives the retaining rib of the needle, as shown in Fig. 12. By this means the knotter frame and the parts mounted thereon and the me dle are firmly interlocked when the needle passes through the knotter frame and holds these parts during the tying operation against vertical displacement by reason of the horizontal upper and lower sides of the main recess engaging with the horizontal upper and lower sides of the needle, and also against lateral horizontal displacement by reason ofthe vertical faces of the supplemental recess engaging with opposite vertical sides of the retaining rib. Cramping of the tying mechanism is thus avoided and proper tying of the bundles insured under all conditions.

Our improved adjusting mechanism for corn harvesters is very simple in construction, the same contains no delicate parts which are liable to get out of order and the same permits of easily and quickly adjusting the binder mechanism to suit the length of the corn to be harvested.

W e claim as our invention:

1. A harvester comprising a binder deck, means for feeding the stalks past said deck, a needle arranged on one side ofthe path of said stalks, and a knotter mechanism arranged on the opposite side of said path and comprising an upright knotter shaft, a bearing sleeve in which said knotter shaft can slide but is compelled to turn therewith, a bearing in which said bearing sleeve can turn but is incapable of sliding therein, and means for turning said bearing sleeve.

2. A. harvester comprising a binder deck, means for feeding the stalks past said deck, a needle arranged on one side of the path of said stalks, a knotter mechanism arranged on the opposite side of said path and comprising an upright knotter shaft, a bearing sleeve in which said knotter shaft can slide but is compelled to turntherewith, a bearing in which said bearing sleeve can turn but is incapable of sliding therein, means for turning said bearing sleeve, and means for rais ing and lowering said knotter mechanism comprising a yoke connected with said knotter shaft and having a screw nut, an ad justing screw shaft engaging said screw nut, and a fixed bearing in which said screw shaft turns but is incapable of axial movement.

3. A harvester comprising a binder deck, means for feeding the stalks past said deck, a needle arranged on one side of the path of said stalks, a knotter mechanism arranged on the opposite side of said path and com prising an upright knotter shaft, a bearing sleeve in which said knotter shaft can slide but is compelled to turn therewith, a bearing in which said bearing sleeve can turn but is incapable of sliding therein, means for turning said bearing sleeve, and means for raising and lowering said knotter mechanism comprising a yoke connected with said knotter shaft and having a threaded shank, a screw sleeve having an outer screw thread engaging with said threaded shank and also provided with an inner screw thread, a screw shaft having an external screw thread engaging with the inner thread of said screw sleeve, and a fixed bearing in which said screw shaft turns but is incapable of axial movement.

4. A harvester comprising a. binder deck, means for feeding the stalks past said deck, a needle arranged on one side of the path of said stalks, a knotter mechanism arranged on the opposite side of said path and comprising an upright knotter shaft, a bearing sleeve in which said knotter shaft can slide but is compelled to turn therewith, a bearing in which said bearing sleeve can turn but is incapable of sliding therein, means for turning said bearing sleeve, and means for raising and lowering said knotter mechanism comprising a yoke connected with said knotter shaft and having a threaded shank, a screw sleeve having an outer screw thread engaging with said threaded shank andalso provided with an inner screw thread, a screw shaft having an external screw thread engaging with the innerthread of said screw sleeve, a clamping nut arranged on said screw sleeve and engaging with said yoke, and a fixed bearing in which .said screw shaft turns but is incapable of axial movement. 7

5. A harvester-comprising a binder deck, means for feedingthe stalks past said deck, a needle arranged on one side of the path of said stalks, a knotter mechanism arranged on the opposite side of saidpath and comprising an uprightknotter shaft, a bearing sleeve in whichsaid knotter shaft can slide but is compelled to turn therewith, a bearing in which said bearing sleeve can turn but is incapable of'sliding therein,means for turningsaid bearing sleeve, and means for raising'and lowering said knotter mechanism comprising a yoke connected with said knottershaft and having a threaded shank, ascrew sleeve having an outer screw thread engaging with said threaded shank and also provided with an inner screw thread, a screw shaft having anexternal screw thread engaging with the inner thread of said screw sleeve, "and a fixed bearing in which said screwshaft turns but is incapable of axial movement, the screw connection between said sleeve and yoke and between said sleeve and shaft being of different pitches. 6. A harvester comprisinga binder deck, means for feeding the stalks past said deck, a-needl'e-arranged on one side of thevpath of the stalks, a knotter mechanism arranged on the opposite side of said path, means for raising and lowering said needle and knotter mechanism simultaneously, and means for adjusting said knotter mechanism vertically independently of said needle.

7. A harvester comprising abinderdeck, means for feedi'ngthe stalks past said deck, a needle arranged on one side of the path of the stalks, a knotter mechanism arranged on theopposite side of said path, means for raisin and lowerin said needle com risin b a carriage connected with the needle and provided with a screw nut, a screw shaft working in saidnut and capable ofturning but incapable of axial movement, a vertically movable "yoke connected with the knotter mechanism and provided with an internally threaded shank, a screw sleeve having an external screw thread engaging with the thread of said shank and also having an internal thread, a screw shaft having an external thread engaging with the internal thread of said sleeve, the threads of the screw connections between said sleeve and yoke and between said sleeve and shaft being of different pitches, and means for operating said shafts in unison.

8. A harvester comprising a binder deck, means for feeding the stalks past said deck, a needle arranged on one side of the path of the stalks, a knotter mechanism arranged on the opposite side of said path, means for raising and lowering said needle comprising a carriage connected with the needle and provided with a screw nut, a screw shaft working in said nut and capable of turning but incapable of axial movement, a vertically movable yoke connected with the knotter mechanism and provided with an internally threaded shank, a screw sleeve having an external screw thread engaging with the thread of said shank and also having an internal thread, a screw shaft having an external thread engaging with the internal thread of said sleeve, the threads of the screw connections between said sleeve and yoke and between said sleeve and shaft being of different pitches, and means for operating said shafts in unison comprising an intermediate shaft and intermeshing gear wheels connecting said intermediate shaft with said screw shafts.

9. A harvester comprising a binder mechanism, a deck arranged on one side of the path of the grain or stalks, a breast plate arranged on the opposite side of'said path, and means for adjusting the breast plate transversely of said path comprising an adjusting rod pivotally connected at one end with said breast plate and provided with a threaded portion, a relatively fixed lug which receives the'threaded part of said rod, and clamping screw nuts arranged on the threaded part of said rod and engaging with opposite sides of said lug.

10. A harvester comprising a tying mechanism movable vertically into different positions, and means for locking "said tying mechanism in one or the other of saidpositions comprising a guide rod provided with a plurality of openings arranged in a row, a guide sleeve embracing said rod and connected with said tying mechanism, and a spring bolt arranged on said sleeve and adapted to engage with one or the other of said openings.

11. A harvester comprising a tying mechanism having a needle, a vertically movable carriage on whichsaid needle is mounted and which'is provided with a lug, a compressorshaft, and a compressor arm having a hub which is compelled to turn with said shaft but capable of sliding lengthwise thereon and Which is provided With two segmental flanges engaging With opposite sides of said lug.

12. A harvester comprising a needle, and a knotter mechanism having a frame, said needle and frame being constructed to become interlocked transversely to the direction of movement of the needle during the tying operation and hold the same against displacement relatively to each other at this time.

18. A harvester comprising a needle provided With a vertical segmental retaining rib, and a knotter mechanism having a frame provided with a main horizontal re- 15 cess having horizontal upper and lower sides adapted to engage the upper and lower horizontal sides of the needle and a supplemental recess having vertical sides Which are adapted to engage with opposite vertical 2o sides of said retaining rib.

Witness our hands this 17th day of June,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G.

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