CLEVISES. 



791. AARON CARMAN, Columbus, 

 N. J. Plow-Clevises. June 20, 1838. 

 Claim. 1. The upright piece L, attached to 

 and raising above the front and upper cover of 

 the clevis F, with one or more square openings 

 to receive a tongue N. 



2. Tongue N, with double horizontal swiv- 

 els J K and also the iron brace T, as herein 

 described. 



4,292. PATRICK GALLAGHER, 



Chambersburg, Pa. Plow-Clevises. Nov. 



26, 1845. 



Claim. The mode of raising and lowering 

 and confining the ring against the inner side 

 of the front or vertical part of the clevis, by 

 means of a segment grooved-wheel, or head, 

 raised and lowered by a vertical screw turning 

 in a female screw, in the upper or horizontal 

 part of the clevis; by which combination and 

 arrangement the weakening of the clevis, 

 arising from the necessity of cutting the usual 

 notches in it for holding the ring is avoided, 

 and the dropping of the ring is prevented ; 

 the said segment grooved-wheel holding the 

 ring against the front part of the clevis at the 

 height desired, and made adjustable to any re- 

 quired level, for various depths of plowing, as 

 set forth. 



4,466. JOSHUA M. C. ARMSBY, 



Worcester, Mass. Plow-Clevises. Apr. 18, 



1846. 



Claim. The circular-plate with the cogs, 

 teeth or projections thereon, in combination 

 with the guide, having ribs, splines or project- 

 ions formed on it in the 'manner and for the 

 purpose described: to prevent the lower end of 

 the guide being moved laterally or sideways by 

 the power of the team. 



4,544. CHARLES L. MEECH, Preston, 

 Conn. Plow-Clevises. May 28, 1846. 

 Claim. Making one arm of the clevis to 

 extend back to within reach of the person who 

 holds the plow, to which arm a regulator is at- 

 tached for governing and securing the same 

 and thus giving any desired pitch to the plow 

 with9ut stopping or checking the team, using 

 for the construction of the same, the most 

 proper, cheap and durable material which will 

 produce the intended effect. 



7,430. SAMUEL WILT, Hagerstown, 

 Md. Plow-Clevises. Sep. 3, 1846. 

 Claim. The combination of the horizontal 

 and vertical adjusting apparatus, constructed 

 as herein described, by which the adjustment 

 can be made either way with the minutest ex- 

 actness. 



5,016. JOHN VAN BROCKLIN, Mid- 

 dleport, N. Y. Plow-Clevises. Mar. 13, 

 1847. 



Claim. The construction of a double-guaged 

 cast-iron clevis, substantially as described. 



5,581. ISAAC EVANS, Lebanon, Ohio. 



Plow-Clevises. May 16, 1848. 



Claim. The adjusting apparatus, consisting 

 of the movable block to which the draught- 

 ring is attached and the bridge supporting the 

 vertical adjusting-screw in combination with 

 the clevis, the adjusting-screws and beam, by 

 which I am enabled to alter the position of 

 the point of draught vertically and horizon- 

 tally, with any degree of nicety, without 

 having to weaken the beam by a special perfo- 

 ration for an adjusting bolt. 



7,608. JOHN B. STONER, Southampton, 

 Pa. Plow Clevises. Sep. 10, 1850. 

 Claim. 1. Forming a plow clevis by means 

 of two arcs of metal, of corresponding outward 

 curvatures, having the point of attachment of 

 the draught link to the martingale, for their 

 common center of curvature, in the manner 

 and for the purposes herein set forth. 



2. In combination with a fixed horizontal 

 arc, having a slot between bearing edges, the 

 vertical arc having notches on its inner curve, 

 adapted to the bearing edges of the fixed arc, 

 wherby the direction of draught may be var- 

 ied horizontally or vertically, as required. 



7,651. GARRETT ERKSON, Hobart, 

 N. Y. Plow Clevises. Sep. 17, 1850. 

 Claim. 1. Making a clevis with teeth or 

 prominences, and cavities on the front surface 

 of a socket, matching with corresponding de- 

 pressions or cavities, and elevations on the sur- 

 face of a movable bar, that the bar and socket 

 when set together by a screw or other equiva- 

 lent fastening in the required position, may 

 have numerous bearings, and be wholly pre- 

 vented from either sliding or revolving in any 

 direction, without breaking the continuity of 

 materials of which the parts are composed. 



2. In combination with a series of radial 

 ridges, or a circle of cavities on the end of a 

 clevis socket fixed at the extremity of the plow 

 beam, a series of teeth, or of conical points 

 on a movable clevis bar, so adjusted to each 

 other that the guide hole of the clevis bar may 

 be held in any required position, and at any 

 necessary distance from the axis, of the beam, 

 without relying on friction of the 'surfaces to 

 prevent slipping, in the manner and for the 

 purpose herein set forth.- 



15,743. EDWIN A. PALMER, Clay- 

 ville, N. Y. Clevises. Sep. 16, 1856. 

 By putting the pin B, with the arms E, down 

 through the openings F in the projection L, 

 and turning one-fourth round, the spring A 

 will press the pin and arms back into the re- 

 cesses I ; the spring will keep the arms in these 

 places and prevent the pin from turning, and 



