US1295479A - Gang-plow. - Google Patents

Description

W. S. GRAHAM.

GANG PLOW. APPucAT'lou FILEDVAPR. to. 1914.

Patented Feb. 25, 1919.

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W. S. GRAHAM.

GANG PLOW.-

APPLICATION FILED APR. 10. 1914.

, Patented Feb. 25, 1919.

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WITNESSES:

ATTORNEY-S W. S GRAHAM.

GANG PLOW.

APPLICATION FILED APR. 10. m4.

WITNESSES. IN I/E IV TOR A TTORN E V5 w. s. GRAHAM. GANG PLOW.

APPLICATION FILED APR.10. I914.

1 %95 479a k Patented Feb. 25, 1919.

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3d j in raised position. is effective to bring about the release of the plows from raised posltion i a past-centerlocking position, means being 50 are inglowered position. It is another obwrnmaiv s. Gasman, or Cameron, ,naimoxs, nssrenoaro PARLIN & ommnomr r conrnnv, or cnnron, rumors, n coarona'rronor rumors. v

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To all whom it may concern:

Be it known that-I, WILLIAM S. GRAHAM, acitizen of'the United States, residing at Canton, in the county-of Fulton, State of Illinois, have invented certain new and useful Improvements in Gan -Flows, of whlch the following is a specification, reference being had to thefaccompanying drawings.

Thisinvention relates to gang plows and particularly to that class of gang yplows adapted to be-drawn across a field bya traction engine. his one of the objects of my invention to providemeans involvin the useof only a single shaft adapted to e actuated at the will of the operator from one ofthe supporting wheels of the plow for raising and lowering the'plows. It is another object of my invention to provide a constrnctioninvolving a shaft for raising and lowering the plows such that a'rotation of the shaft when the plows are in lowered position serves to raise the plows and a rotation of the shaft when the plows are in raised position serves to release the plows from raised position. It is another object of my invention to provide means for raising and lowering the plows involving the use of .a single operating cord for throwing the raising means into operation, such that a pull upon the .cord when the plows are and: a-pull upon the same cord when the plows are in lowered position is effective to bring about the raising of the plows. It is 1 another object of. my invention to providea beamsrelative to the plow frame.

construction involving the use of links for drawingthe plowsto elevated position, the forward ends of said links being adapted to be moved in. the plow lifting operation into provided for holding the rear ends of the linksjin a normal predetermined position while the plows are in raisedposition regardlessof the angular position of the plow t is an- Other object of, my invention to provide means .in connection with such a link construction, for preventing the undue sagging of; the. rear ends of the links when the plows ject ofmy invention to improve devices of this typein sundry details hereinafter pointetiptlt. l he,.. -preferred,means-by which I have "accomplished these objects are illus- Specification of Letters Patent.

' Application filed April 10, 1914. Serial naeaoeos.

Patented- Feb. 25-, 1919.

trated in the drawings and are hereinafter specifically described.

In the drawings Figure 1 is a top or plan-view of a gang plow embodying my improvements, only two of the several plows being shown;

Fig. 2 is a side view of the plow shown in Fig. 1, but with'only one of the plows illustratedand with one of the supporting wheels removed;

Fig. 3 is an enlarged detail of one of the power elevating. devices in position ready for raisinga plow upon the actuation of the power shaft;

4 is a similar view, but showing the position of the parts after the plow has been raised with the link in its past-center looking position for holding the pl'ow against descending;

r 5 is a similar view but showing the position of the parts when the power shaft has been given a partial rotation from the position shown in Fig. 4:, with the parts in plow to fall freely to the power for lifting purposes, being substantially a section taken on line 8-8 of Fig. l; and

Fig. 9 is a top shown in Fig. 8.

Referring to the several figures of the drawings, in which corresponding parts are indicated by the same reference characters,-

202l indicate the side bars of the frame ofmy plow converging at their forward ends and having mounted thereon a caster wheel 22. The bars 20-21 are connected at their rear ends to the diagonally-extending rear frame-bar 23 to which the plow beams are adapted to be connected- Journaled upon an aXle 24 carried by the bars 20 and 23 near their rear ends isv a ground wheel 25 provided with studs 26 on its periphery by which the wheel is enabled to properly grip the ground for power purposes. Near the front end of the diagonal bar 23 in rear thereof there is provided a supporting wheel or plan view of the parts 27. Diagonally-positioned brace-bars 2829 extend from the side bars 20-21 respectively, o the diagonal bar 23.

30 31 indicate brackets mounted upon the diagonal bar 23 in any suitable manner, on each of which bracket-s there are pivotally mounted upon a horizontal axis bars 32-33 comprising a plow beam, upon which plow beams plows 34--35 are mounted in any suitable manner by means of standards 36. Each of the plow beams has pivotally mounted upon it a swinging arm 37, upon the lower end of which there is journaled a gage wheel 38 adjustable relative to the plow beam through the medium of a bell crank lever 39 and a link 39 in the manner shown and described in Letters Patent to me No. 1,084,081, of January 13, 1914; A lever 40 .is provided in connection with each of said bell crank levers as described in said patent, adapted to be locked at any desired point upon the circular rack-bar 41' and adapted through the medium of a stop 39 on the said bell crank lever to limit the movement of the bell-crank lever in counter-clockwise direction in Fig. 2. As will be readily understood the lever 40 is also adapted to be swung in clockwise direction in said figure for turnin the bell crank lever in the same direction for raising the beam and the plow carried thereby upon the gage wheel.

42- 13 indicate the transverse bars of an auxiliary frame secured upon the main plow frame by means of angle irons 44 or in any other suitable manner. The cross bars 4243 f the auxiliary frame are joined by a plurality of bars 45, one of such bars being provided for each of the plow beams.

46 indicates a transverse power shaft revolubly mounted in the auxiliary frame comprising the bars 42, 43 and 45. As best shlown in Figs. 8 and 9, 47 indicates a clutch member revolubly mounted upon the shaft 46 at one end thereof, provided upon its outer periphery with a sprocket-gear 48. Said sprocket-gear 48 is connected by a sprocket-chain 49 with a sprocket-gear 50 revoluble with the ground wheel 25. The clutch member 47 is thus maintained during the forward movement of the plow constantly in rotation in clockwise direction in said Fig. 8.

The means for locking the shaft 46 with the clutch member 47 so as to rotate said shaft comprise a bracket 51 keyed or otherwise fixed upon the shaft 46 adjacent to the clutch member. Pivotally mounted upon the bracket 51 upon a pin 52 carried therebyls an arm 53 provided with a roller 54 adapted to be brought into operative engagement with any one of the rounded notches or grooves 55 formed on the inner periphery of the drum-like clutch member 47. A spring 56 serves to connect the bracket 51 with the arm 53 tending to hold the arm 53 turned in clockwise direction upon the pivot pin 52' 60 upon one of the cross-bars 45 of the auxil-.

iary frame, said roller 58 being of such a width as to engage also the adjacent pivotally-mounted arm 53. Said bar 59 is provided with an opening in its upper end by which a cord or cable 60 is secured to said arm, said cord being provided for the purpose of pulling the upper end of said arm forward against the action of a spring 61 secured thereto. As clearly shown in Fig. 8, the roller 58 carried by the lower end of the arm 59 when in normal position in the notch 57 in the outer end of the bracket 51 serves to hold the roller 54 carried by the arm 53 displaced to the right in said fi ure out of operative engagement with the c utch member 47.

As will be readily understood, when it is desired to give the shaft 46 a rotation in clockwise direction in Fig. 8, the arm or lever 59 is given a stroke in clockwise direction in said figureby a forward pull upon the cord 60' or in any other suitable manner, withdrawing the roller 58 from the notch 57. The arm 53 is then turned upon the pin 52 by the spring 56, bringing the roller 54 into operative engagement with one of the notches or grooves 55, causing the shaft 46 to turn in clockwise direction in said figure with the constantly-rotating clutch member 47. As soon as the bracket 51 has been turned sufficiently to clear the roller 58, the lever 5-9 may be released, whereupon the spring 61' serves to return such lever 59 to the position shown in Fig. 8. I When the bracket 51 has substantially completed a single rotation the front edge of 'the bracket is brought into, contact with the roller 58, causing the displacement of said roller to the left in Fig. 8 until the roller can again drop into normal position in the notch 57 of said bracket, displacing the arm 53 and roller 54 as above described. thus stopping the rotation of the shaft 46.

Adjacent to each of the bars 45 of the auxiliary frame there is revolubly mounted upon the shaft 46 an arm 62, said arm being held in position onsaid shaft by the hub 63 of the lifting bracket 64 fixed upon said shaft adjacent to the hub 65 of said arm. Pivotally mounted upon the outer end of said arm 62 is a link 66 to which, near its rear end, a second link 67 is pivotally connected. As best shown in Figs. 1 and 2, the rear end of each of the links 67 passes freely through a perforated lug 68 carried by one of the bell crank levers 39. Each of said links 67 has adjustably mounted upon it a masses stop device 68', in the construction shown saidstop device being in the form of a nut secured thereon by means of screw-threads.

'tion between said links 6667, said stud 69 being adapted to rest upon the link 67 so as to keep said links 6667 substantially in alinement with each other and to prevent their sagging downward at their pivotal connection.

Each of the brackets 64 comprises two arms 707l, the arm 71 being slightly longer than the arm 70 and being provided with a notch 72 in its outer end. Upon each of the arms 62 ,is pivotally mounteda pawl 73 in alinement with the bracket 64 adjacent to said arm. Upon the pivot pin 74 of each of said pawls there is mounted a light coiled spring. 75 which bears upon the pawl, tending to' hold the pawl frictionally against swinging relative to the arm 62. Upon a rotation of the shaft 46 in clockwise direction in Fig. 3, the arm 71 is brought into engagement with the end of the pawl 73, causing the arm 62 to turn in clockwise direction with said shaft, swinging the bell crank lever 39 in clockwise direction in Fig. 2 through the medium of the links 66-67 and causing the plow 35 to rise out of the ground upon the gage wheel 38. Soon after the pivotal connection between the link 66 and the arm 62 passes below the center of the shaft 46, the end of the pawl 73 in advance in its movement with thea'rm 62 is brought in contact with a stud, or roller 76 carried by the bar 45, causing the pawl to turn in clockwise direction relative to the arm 62, freeing the end of said pawl from the notch 72 of the lifting arm 71. The arm 62 then comes vto'rest upon the stud or roller 76 with the end of the link 66 in a past-center locking position, "as will be readily understood, serving to maintain the plow in elevated position. When the shaft 46 has completed a single revolution, its rotation is stopped as above described, with the parts in the condition shown in Fig.4. With the plow held in raised position, as illustrated in Fig. 4, the rear end of the link 66 is supported by a standard 77 mounted upon the transverse bar 42 of the auxiliary frame. In this position the stud 69 is at some little distance from the link 67 so that at whatever angle the link 67 extends rearwardly from its pivotal connection with the link 66 the link 66 itself is held always in the same position relative to the shaft 46.

Whenever it is desired to lower the plows. the shaft 46 is again set in rotation, bring ing the arms 70 of the brackets 64 into contact with studs or rollers 78 carried by the link 66, serving to raise the forward ends of said links out of their past-center locking position whereby the plows are permitted to drop by gravity into working position. The rotation of the arm 62 in counterclockwise direction is limited'by a pin 79 carried by the bar 45 of the auxiliary frame. As the arm 62 approaches its rearmost position, as shown in-Fig. 3, the pawl 73 is brought in contact with a stud or roller 80carried by the frame-bar 45, serving to turn the pawl 73 against the frictional action ofthe spring 75 into position to be engaged by the arm 71 of the bracket 64 upon the next succeeding rotation of the shaft46. By reason. of the shorter length of the arm 70, such arm 70 is adapted to be turned past the pawl 7-3 without operatively engaging it.

From the above description it will be seen that a rotation of the shaft 46 with the plow in raised position serves to release the plow from raised position by raising the link 66 outof its past-center locking position; and

that a rotation of the shaft 46 with the plows in their lowered position serves to raise said plows. That is to say, each alternate rotation of the shaft 46 serves normally to raise the plows, and each other al-- As will be readily understood, eachof the plows is provided with raising means of the type above-described, comprising an arm 62, a bracket 64, links 66 and 67 and pawl 73, whereby said plows are raised and lowered by independently-acting mechanisms actuated by the shaft 46 and its operating means. As is best shown in Fig. 7, the brackets 64 are preferably staggered upon the shaft 46 relative to each other whereby the several plows are raised successively, as is well understood in the art.

While I have shown the cable 60 in the form of a flexible cord, it will be understood that I do not wish to limit myself to that specifically claimed. I a

, WVith the operating means by which the rotation of the shaft 46 is effectively transmitted to the several plows for raising purposes in operative position with the pawls 73 turned upon their pivot pins 74 so as to be engaged by the arms 71 of the bracket 64, the operation of the machine will be normal, as above described. It will be readily understood, however, that if such operating parts should not be moved completely into operative position whereby any of the arms 71 when the plows are in lowered position might be moved past the corresponding awl 73 without engaging it, the rotation of the shaft 46 would then fail to have any effect upon the plow normally adapted to be raised through the use of such' arm and pawl. While it is important that some expedient be employed for insuring that the operating parts includingthe pawls 73 shall be in operative position when desired, I wish to have it understood that I'do not limit myself to the particular means shown nor to any automatically-acting means for accomplishing this result, except as hereinafter specifically claimed.

While my raising and lowering means is designed normally for raising all of the plows in order and for thereafter lowering all of the plows in order, it will be understood that the mechanism as shown is ada ted to operate effectively whether all t e plows are being raised together in order or not. For example, if when all the plows are standing in raised position the operator should manually raise one of the links 66 so as to permit one of the plows to fall to the ground, then upon the next complete rotation of the shaft 46 the plows in raised position would be lowered and the plow in lowered position would be raised.

By the use of the standards 77, regardless of diiferent angles at which the plow beams stand on account of the unevenness of the ground, the links 66 are all maintained at a uniform angle when the plows are in raised position so that the arms 70 are brought into effective operation to raise such links at precisely the proper intervals for dropping the plows successively as desired. 'YVhat I claim-as m invention and desire to secure by Letters, atent, is-

1. In a gang plow, the combination of a frame, a plow operatively connected with said frame and adapted to be raised and lowered relative thereto, a shaft, a link operatively connected with said plow extending adjacent to said shaft, means carried around by a rotation of said shaft adapted to exert a pull upon said link for raising said plow and for moving the forward end of said link into a past-center locking position, and a standard mounted on the frame in alinement with said link upon which standard the rear end of the link rests when the plow is in raised osition, the link being thus kept constant y in normal position relative to the releasing Copies of this patent may be obtained for mergers means while the plow is in raised position whereby the releasing may be accurately timed.

2. In a gang plow, the combination of a frame, a plow operatively connected with said frame and adapted to be raised and lowered relative thereto, a rigid link operatively connected with said plow at its rear end whereby a forward pull upon said link serves to raise said plow, a second rigid link pivotally connected to said first-named link, means for exerting a forward pull upon said second link for raising said plow, and means for preventing said links from sagging at their pivotal connection.

3. In a gang plow, the combination of a frame, a plow operatively connected with said frame and adapted to be raised and lowered relative thereto, a rigid link operatively connected with said plow at its rear end whereby a forward pull upon said link serves to raise said plow, a second rigid link pivotally connected to saidfirst-named link, and means for exerting a forward ull upon said second link for raising said p ow, said links being adapted to swing upward freely at their pivotal connection but be ing limited in their downward swinging relative to each other.

4. In a gang plow, the combination of a frame, a plow operatively connected with. said frame and adapted to be raised and lowered relative thereto, a rigid link operatively connected with said plow at its rear end whereby a forwardpull upon said link serves to raise said plow, a second rigid link pivotally connected to said first-named link, means for exerting a forward pull upon said second link for raising said plow, and means carried by one of said links adapted to engage the other link for limiting the swinging of said other link in an upward direction relative to said one link.

WILLIAM s. GRAHAM.

lVitnesses:

WILLIAM C. LIN'roN, RAY FORTENBACK.

five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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