Patent GB-190123450-A (GB)
Title: Improvements in Automatic Control Mechanism for Automatic Sheet Feeders and the Machines they Feed.
Inventor: CLEATHERO EDWARD THOMAS
Filed: 1901-11-19
Granted: 1902-10-02
Abstract: 23,450. Cleathero, E. T. Nov. 19. Feeding sheets; stopping and starting apparatus.-Relates to apparatus for controlling automatic sheet-feeding mechanism of printing and other machines, which operates to stop the sheet feeder and the printing &c. machine in case two sheets are fed together, or in case no sheet is fed to the feed-board, and also when the pile of sheets is exhausted. The pile of sheets 1 is on a rising table 2, the sheets being fed by usual means to the tape roller 6 and pulleys 14 and carried down the feed-board 9 by tapes 8 to the cylinder 3. Above the roller 6 is a shoe or shoes 10 adjustably fixed on a shaft 11 having an arm 23 connected by a link 24 to a bell-crank lever 26 pivoted at 27 to the frame 5. The shoe 10 is mounted to slide on a split sleeve 18, Fig. 4, fixed by a screw 18<a> in the desired position on the shaft 11. Screws 21, 19 adjust and clamp the shoe in position on the sleeve 18. The sleeve 18 is weighted at 32. A cam on the shaft 25 engages a roller 33 on the lever 25, and operates to move the shoe 10 into the position shown in full lines in Fig. 4, each time a sheet is fed to the roller 6. If only one sheet is fed, it passes under the shoe, but, if two are fed together, the nose 13 of the shoe is nipped and carried forward to the position shown by dot and dash lines in Fig. 4. The lever 26 is thereby moved to engage a projection 28 on a link 29 pivoted to a lever 31 pivoted to the framing at 53. The lever 31 is thus rocked to stop the machine when two sheets are fed. The sheets are guided to the cylinder 3 by a curved plate 41, and at the front end of the board 9 are one or more grates or sets of grooves into which sets of ribs 38 on arms 37 may fall when no sheet is present over the grates. The arms 37 are on a shaft 39 having an arm 44 to which is pivoted a link 45 guided by a swivel guide 46 and engaging a lever 47 pivoted at 48. The lever 47 is rocked by a cam 50 on the shaft 25 to raise the levers 37 at each feed. If no sheet is fed, the levers 37 fall far enough to cause the lever 47 to engage a projection 51 on the link 29. The link 29 is pivoted to a link 30 pivoted to the framing. When the link is moved to the right by either of the levers 28, 47, as described, it rocks the lever 31, and this through a link 54 rooks a bell-crank lever 55, 56, which normally engages a lever 58 having an abutment 60 engaging a stud or projection 61 on a weighted lever 59. The lever 59 engages a projection 63 on a rod 64 pivoted to an arm 73 on a shaft 74 which operates the clutch lever 77 of the clutch 52. The rod 64 is connected by a stud and slot to the hand stopping-lever 72 of the feeding-machine. The lever 59 has also a projection 66 engaging a slot in a link 68 connected to the stopping-lever 4 of the printing-machine. When the lever 56 releases the lever 58. the lever 59 is pressed down by its weight to operate the rods 68, 64 to stop the machines. On the rising table 2 is a roller 79, which engages the curved end 78 of the lever 31 and operates it to stop the machines when the table 2 reaches its highest position.