MOLD-BOARDS. 



ISAAC SNEIDER, Mount Pleasant, Pa. 

 Plows. July 2, 1836. 



The improvement in the land-side, cutter, 

 shear and point, as before described, enabling 

 the farmers to change or reverse the position 

 of the nose and shear four times, and produc- 

 ing a new cutting edge each time. 



1,357. SAMUEL WITHEROW and 

 D. PEIRCE, Gettysburg, Pa. Plows. 

 Oct. 5, 1839. 



Claim. Giving to our mold-board the form 

 of a segment of a cycloid, conversily on its 

 face, in lines leading from front to rear, and 

 concavely in the lines of the ascent of the fur- 

 row slice, in the manner and for the purpose 

 herein described. 



2,626. CORNELIUS BERGEN, Brook- 

 lyn, N. Y. Plows. May 16, 1842. 

 Claim. 1. The peculiarity of the form of 

 the mold-board as produced by the combina- 

 tion of the increased twist and wedge, the ad- 

 vantages of which are that it materially les- 

 sens friction, and consequently the traction or 

 draft is much diminished, the covering is more 

 uniform on every part of it, which causes it to 

 do its work in a superior manner. 



2. The manner in which the point and share 

 are formed and held to the mold-board, the 

 peculiarity of their construction, and the man- 

 ner in which they are held in their place by 

 means of the gripes, which enables them to be 

 made of cast-iron instead of wrought, suffici- 

 ently strong for all purposes, and consequently 

 the annual cost is much cheaper. 



3. The additional piece to heighten the 

 mold-board when desired, the advantages of 

 which are that a second slice may be taken out 

 of the bottom of a furrow previously made and 

 cast completely above, which answers the pur- 

 pose of trenching as performed with a spade. 

 It is also of great service when plowing weedy 

 ground, all as herein described. 



3,069. HARVEY H. MAY, Galesburg, 

 . 111. Plows. May 2, 1843. 



Claim. The fastening of the shares or edges 

 between jaws, so that a dull share can be quick- 

 ly taken out to sharpen or to exchange without 

 inconvenience ; so that the shares can be made 

 to fit in the field as well as in the shop; so 

 that the often sharpening of the shares which 

 is so necessary on these prairies does not spoil 

 the shares by drawing them from the holes and 

 out of shape, as is the case when bolts go 

 through them ; so as to avoid spoiling the run- 

 ning of the plow by sharpening, as is the case 

 when the shares are riveted and welded ; and 

 so that the shares can be made with much less 

 cost and risk than in either the common way 

 of riveting and welding or of punching holes 

 and fitting for bolts. 



3,576. AARON SMITH, Bloomfield, 



Mich. Plows. May 6, 1844. 



Claim. I am fully aware that mold-boards 

 have been made with the lines straight which 

 are parallel to its base, but not parallel, as I 

 believe, to the edge u s of the board ; and I 

 am also aware that lines radiating from an as- 

 sumed-point have been applied to the forming 

 of the face of a mold-board, such lines having 

 been straight, or of such a curvature as may 

 have been preferred by the maker ; but such 

 assumed radiating-point has been below the 

 base-line of the mold-board, and has conse- 

 quently failed in effecting the purpose intend- 

 ed. I do not therefore claim anything new in 

 the principle ; but I do claim to have devised 

 a mode of carrying out the principle upon 

 which my mold-board is formed, so as to have 

 constructed an instrument more perfect in its 

 action than any hitherto made. And I will 

 here observe that while I have given such pre- 

 cise measurements and proportions as I have 

 found and verily believe to be the best in prac- 

 tice, they may be deviated from to a slight ex- 

 tent without essentially changing the construc- 

 tion of the improved plow. The radiating and 

 parallel lines, for example, may be slightly 

 curved, instead of being straight. The partic- 

 ular outline may also be in some degree chang- 

 ed, while the whole structure would remain 

 substantially as described, and my right be as 

 readily violated as though such colorable 

 changes had not been made. 



4,488. JOHN M. MAY, Philadelphia, Pa. 

 Plows. May 2, 1846. 



Claim. 1. Making the landside, the bed of 

 the share, and the standard all in one piece of 

 sheet steel metal, cut out in the manner de- 

 scribed, so as to afford greater stability and to 

 reduce the cost of construction. 



2. Making the colter with two points and 

 two cutting edges and secured to the landside 

 of the standard to admit of reversing end for 

 end, and inclining the forward point up or 

 down, for the purpose and in the manner de- 

 scribed. 



3. Connecting the axle-tree of the guide 

 wheels with the beam by means of adjustable 

 arms to afford a means of directing the plow, 

 as herein described. 



10,031. SAMUEL HULBERT, Ogdens- 

 burg, N. Y. Plows. Sep. 20, 1853. 



Claim. Constructing a mold-board of a 

 plow so that a horizontal line drawn at any 

 height across its working side shall describe the 

 convex arc of a given circle, and any line 

 drawn across its working side at right angles to 

 the base shall also describe the convex arc of a 

 circle, substantially as set forth. 



