Patent GB-190318515-A (GB)
Title: Improvements in Self-acting Multi-spindle Machines for Boring, Drilling, Turning, Milling and the like.
Inventor: HOWORTH FRANKLIN WISE
Filed: 1903-08-27
Granted: 1904-06-09
Abstract: 18,515. Howorth, F. W., [Wanner & Co.]. Aug. 27. Boring and drilling; milling lathes. -In a multiple machine for boring, drilling, turning, milling, &c., the rotary work spindles 5 are mounted in a table 2 which is partially rotated on the pillar 1 at any desired intervals of time to bring each article successively into positions to be operated upon Dy tools on the fixed spindles 89 which may be traversed vertically, horizontally, or both independently of each other. Each spindle 5 is rotated by spur gearing 16, 15, a worm-wheel 14, a worm which can be moved longitudinally to bring the friction-disc 12 into contact with the upper or lower surface 18, 17 of a friction cylinder 9, and by bevel gearing 10. The end thrust of the worm forces the disc 12 towards its driving-surface 18 or 17. During screw - cutting operations, the spindle 5 and its externally-screwed upper bearing 19 are raised or lowered according to the direction of rotation of the spindle by a nut 21, spur and change gearing 22, 23, 24, 25, 26, 27, 28, 29, and a clutch 33, 34. As each article comes under the screwing-tool, an incline 35 lifts the rod 36 and depresses the upper part of the rod 38 which is locked by a spring catch 58, thus keeping the clutch 33, 34 in engagement. On a disc 32 on the shaft 31 is mounted a wheel 42 gearing with a fixed wheel 43, and carrying a perforated disc 42‹. In this disc are adjustable and fixed pins 44, 45 describing epitrochoids which gradually move round the shaft 31, and, after the spindle has made a number of rotations corresponding to the position of the adjustable pin, one of the pins moves the lever 46, 47 and the bell-crank lever 50, and after the toggles 51, 52, Fig. 6, have passed their dead point, the spring 55 completes the movement of the lever 50, rotates the whole of the rod 38, and moves the worm-shaft 13 longitudinally to reverse the motion of the spindle 5. At each reversal, the ratchet-wheel 49 and the catch 58 are partially rotated, and after a predetermined number of reversals the catch comes opposite to a notch in the cone 57, and allows the spring 40 to throw the clutch 33, 34 out of gear. The table 2 is rotated by means of a worm 60, a belt pulley 67, and a clutch 68, Fig. 12, which is thrown into and out of engagement by toggles 81, 82, a spring in the cylinder 80, a lever 79, and a pin 77 in a perforated disc secured to a wheel 75 rolled inside the fixed wheel 76 by worm and change gearing 73, 72, 70,69. A locking-catch 64 for the worm 60 is operated by a bent pin on the shaft of the toggle 82 and a stop 86* secured to the table 2. Each spindle 89 is drawn to its highest position by a weight 90, and each slide-rest is drawn horizontally to its normal position by a weight 98 and carries a drum 109 which is rotated by a worm 104 and gearing 102, 101, 100 after the rod 106 has been lifted by a bell-crank lever 111 and the head of one of the rods 36 just before the article arrives below the spindle 89. An adjustable pin 127, Fig. 3, on the drum 109 withdraws the catch lever 126 from the stop 125, and allows the spring 110 to pull the worm 104 out of engagement with the drum 109. On the fixed drum axis 108 are secured a wheel 116 and a disc 122 with adjustable cam-rings 123, 124 for moving the spring-pressed shafts 112 inwards and the clutches of the wheels 114,114* out of gear with the wheels 113, which roll on the wheel 116, and into gear with the clutches 115 secured to the drum 109, thus causing the wheels 117, 118 or the wheels 119, 120 to rotate with the drum. The wheels 118, 120 operate other wheels and pinions 121, 93 and 95, 96, and, by means of racks 92, 97, lower or traverse horizontally the spindles 89.