Patent GB-190510105-A (GB)
Title: Improvements in Machines for Rectifying the Teeth of Gear Wheels
Inventor: GOUADON EUGENE
Filed: 1905-05-13
Granted: 1905-09-21
Abstract: 10,105. Gouadon, E. May 14, 1904, [date applied for under Patents Act, 1901]. Milling.-In a machine, of the type in which the teeth of gear-wheels that have bean distorted in tempering or of wheels rough from the cast are rectitied by a grindstone having a profile corresponding to that of the tooth of a rack, and the wheel to be operated on is made to move in front of the rotating and reciprocating grindstone, so as to imitate the motion of a wheel on a fixed rack, the table 4 which carries the wheel to be operated on is reciprocated by the screw 5, which is driven from the pulley 14, Fig. 3, by bevel gearing 10, 9, 8, a clutch 7 bringing the bevel-wheels 9, 8 into gear alternately. The table 4 moves to the left until the standard 25, Fig. 1, strikes the stop 23 on the bar 22 and carries it forward and so pushes over the lever 21 and transfers the clutch 7 to the wheel 9 thus altering the direction of motion of the table.' As the table moves, the wheel 20, Fig. 3, moves along the screw 19 as if it were a rack and so causes the wheel to be operated upon, which is mounted on the spindle 47, to rotate in front of the grinding-wheel. The table 4 then moves to the right until the standard 25 strikes against the stop 40. This causes the rod 39 to pull over the bell-crank lever 36 and so raises the tappet 32. This in turn lifts the end 30 of the lever 28 and raises a projection on the arm of that lever out of a notch in a disk 12, pressed against the bevelwheel 10 by a spring 13 and driven by frictional contact with it. This disk 12 is thus allowed to rotate, and, operating through a train of wheels 15, 16, 17 and helicoidal wheels 18, drives a worm 19 and turns the wheel to be rectified on the shaft 47 so as to make it present another tooth to the grinding-wheel. Directly after the standard 25 strikes the stop 40, it also strikes the stop 24 on the bar 22 and thus pulls the clutch out of gear with the wheel 9. The lever 21 is not allowed to. complete its stroke and bring the wheel 8 into gear because of a stop 31 on the lever 28. The . tappet 32 is pulled out of contact with the projection 30 on the lever 28 and allows it to fall back on to the disk 12, so that when the next notch comes round, after a quarter revolution, the projection drops into it and locks the disk. The falling of the lever 28 moves the stop 31 out of the way of the lever 21, and the stroke of that lever is completed under the action of the block 42, which is pressed downwards by a spring 42<a>. The wheel 8 is thus brought into operation again and the table moves to the left and the series of operations is repeated, the grinding-wheel acting on the next tooth. The grinding-wheel is all the while rotated and the slide 45 on which. it is carried is made to have a rapid alternating vertical motion by means of a crank of adjustable radius, so that it may grind the full width of the tooth. The adjustment of the thickness of the tooth is obtained by a micrometer screw 43 moving the grindstone. The sizes of the gear-wheels in the trains used to operate the mechanism are calculated to suit the size of the wheel operated on.