STEAM. 



637 



"foot made in hat shape, with a hollow crown 

 and a curved rim, as and for the purpose des- 

 cribed. 



g. The combination of a traction-chain hav- 

 ing a smooth track formed on its inner surface, 

 a carrying-frame, and a set of wheeled trucks 

 connected permanently with the carrying- 

 frame and resting upon the smooth track or 

 rail of the traction-chain, as and for the pur- 

 pose described. 



10. The combination, with the traction-chain 

 having a smooth way or rail, and the carrying- 

 frame B B, of a set of wheeled trucks connected 

 flexibly together throughout the series, and 

 having an elastic connection with the carrying- 

 frame, as described. 



ii. The combination, with the double frame 

 B B, having cross-plates/, of the endless trac- 

 tion-chain, the trucks resting thereupon and 

 connected with the cross-plates by a vertical 

 pin or rod, and an interposed spring, as and 

 for the purpose described. 



12. A truck composed of four wheels and 

 two axles, and having one of its axles arranged 

 in fixed bearings and the other arranged in 

 bearings free to oscillate horizontally, in com- 

 bination with the flexible traction-chain and 

 the carrying-frame arranged to bear upon said 

 trucks, as and for the purpose described. 



13. The trucks having one axle arranged in 

 fixed bearings and the other in horizontally- 

 oscillating bearings, with both axles having a 

 free endwise movement, in combination with 

 the flexible traction-chain and carrying-frame, 

 as and for the purpose described. 



14. The combination, with the traction-chain 

 and the carrying-frame, of two four wheeled 

 •trucks and a loosely-coupling reach or bridge- 

 piece, G 3 , together with a spring and a sliding 

 rod for connecting the bridge with the carry- 

 ing-frame, as shown and described. 



15. The bridge-piece G 3 and cross-plate /, 

 formed with an annular recess, k, and cylinder 

 /, in combination with a rod, m, and a spring, 

 for the purpose of securing the greatest length 

 of spring and the shortest rod, as herein des- 

 cribed. 



16. The bridge-piece G\ having an annular 

 depression, k, and a hollow cylinder, /, screw- 

 threaded below, in combination with the slide- 

 rod m and the stop-screws q, to act as a stop 

 or render the trucks non-yielding, as set forth. 



17. The spring n, made in sections, and sepa- 

 rated by one or more steady-buttons, 0, in com- 

 bination with the bridge G 3 , and cross-plate/, 

 and the central rod, as and for the purpose set 

 forth. 



18. The combination of the two traction- 

 chains having feet to engage the ground and a 

 set of trucks for each chain with one or more 

 coupling-bars or cross-rods, H, substantially as 

 and for the purpose described. 



19. The metal bar Q, fixed to the frame of 

 the engine, and having a forward center curve, 

 ■z, and two forward side curves, in combination 

 with the plow-frame K, having central tongue, 

 M, and arms or sway-bars N N, both provided 



with friction-rollers, and adapted to bear against 

 the bar Q and oscillate, as described, about 

 the center of the engine. 



20. The plow-frame having a shaft, P, at 

 right angles to the line of draft, carrying a 

 series of plows, arranged side by side and at 

 right angles to the line of draft, in combination 

 with a standard, S, carrying an elongated blade 

 or runner, R, arranged to press against the land- 

 side of the preceding furrow to counteract the 

 lateral thrust as set forth. 



21. The plows L, having elevated standards 

 and forward extensions midway of said stand- 

 ards, provided with rigid sleeves s s, in combi- 

 nation with an axial shaft, P, parallel separat- 

 ing frame-bars, and push-bars V, by which the 

 plows are held or rocked on said shaft, as des- 

 cribed. 



22. The combination, with the plows, hinged 

 or jointed upon a horizontal shaft and having 

 their standards extended above the said shaft, 

 the push-bar V, having notch c n, and the 

 hinged catch/ c, having an arm or extension 

 held by a spring to resist the normal draft- 

 strain of the plow and allow the plow to be 

 tripped by an unusual strain, as described. 



23. The combination, with the hinged plows 

 L and their push-bars V, of a continuous shaft, 

 W, having a series of tappets, X', for each plow, 

 and means for rocking the shaft, whereby the 

 -tappets are made to trip the push-bars and 

 throw all of the plows out simultaneously, as 

 described. 



24. The combination, with the traction-chain 

 and independent driving-gears connecting re- 

 spectively with each, of a differential gear, 

 which is an element on one of the train of 

 driving-gear, and is permanently connected to 

 both the shaft from which it receives motion 

 and the gear to which it transmits motion, 

 whereby either an accelerated or a diminished 

 speed is imparted to one of the traction-chains 

 without variation in the speed of the main 

 drive shaft and without disconnection of the 

 gears, as described. 



25. The differential gear composed of the 

 central shaft, A', a hollow hub, b' ', fixed to said 

 shaft, the loose drive-pinion a', and spiral 

 gear-wheel /, fixed on a sleeve encompassing 

 the shaft A', the shaft /, carrying spiral gear- 

 wheel d' and crown-wheel /', the loose cup- 

 shaped disk G', having a spiral flange, H, gear- 

 ing with the crown-wheel, and a friction-brake 

 or means for arresting the motion of the disk 

 G\ substantially as and for the purpose des- 

 cribed. 



26. The combination, with the differential 

 gears F' F 2 , constructed as described, of the 

 strap-brakes H' H 2 , the concentric shafts I' I 2 , 

 and the hand-levers J' J 2 , substantially as and 

 for the purpose described. 



27. The combination, with the differential 

 gears and mechanism for setting them in action, 

 of a second train of mechanism for automati- 

 cally operating them, consisting of a cam, K', 

 located on one of the shafts of the sprocket- 

 wheels, a swinging frame or cross-head carry- 



