Patent GB-199653-A (GB)
Title: Improvements in or relating to apparatus for scoring or cutting sheet glass
IPC: C03B33/027
Filed: 1922-10-10
Abstract: 199,653. Jackson, W. J. Mellersh-, (Libbey Owens Sheet Glass Co.). Oct. 10, 1922. Cutting glass.-An apparatus for scoring and dividing sheets of glass comprises a conveyer band 3, Fig. 1 moving the sheets 1 from a leer 2, and a carriage 13, 14 automatically coupled to travel with the conveyer 1 while the sheet is being scored, the scoring-tool moving simultaneously in the transverse direction. The sheet-carrying band 3 comprises wood blocks 5 mounted on chains 4 guided by rollers 6 and carrying rollers on pintle extensions 56. The scoring-tool carriage 13, 14 has rollers, guided on rails 10, Fig. 1, mounted on opposite sides of the main frame, and a cross-connection 15 forming a guide for scoring-tool carrying chains 17, which pass over sprockets on the carriage. On the member 15 are switches 126, 38 actuated by lugs on the chain. The carriage 13 carries a gear 58, constantly in mesh with rollers on the chain 55 and, loosely mounted on a shaft 59 to which it can be coupled by a clutch 62 actuated by a spring 75 and declutched by a handmoved cam 73. A clutch member 119 keyed to the shaft 59 co-operates with a loosely mounted clutch member 120 with teeth 117 turning, through gears 116, 115, 112, a spring-urged graduated disc 96. An electromagnet 121 is provided for breaking the clutch 119, 120 and another electromagnet 77 locks the gear 58 against rotation on the shaft 59 causing the gear and the carriage 13, 14 to be moved with the conveyer. The apparatus operates as follows :-When the cutting-mechanism is idle the clutch 62 is out and the gear 58 turns idly. To cut a length of, say, 60 inches a peg 120 is placed in a hole on the graduated disc 96, Fig 2. the hand wheel 73, Fig. 3 turned to permit engagement of the clutch 62, and a hand switch 85, Fig. 2, pressed to complete the circuit 86, 30, 46, 87, 85, 88, 77, 89, 90, Fig. 10, energising an electromotor 30, driving the chain 17 and the electromagnet 77 and thus causing the carriage to travel with the moving sheet and the scoring tool to operate. A lug (not shown) on the chain immediately actuates the switch 38 allowing the contact 85 to be released but the circuit maintained. While the score is being made another lug 127 engages a switch 126 to close a circuit through the electromagnet 121 unclutching the gear 117 and allowing the disc 96 to be restored to its zero position by the spring 97. A lug 128 now actuates the switch 126 and breaks circuit through the electromagnet 121, allowing the spring 75 to reset the clutch 119, 120. After the scoring is completed a lug 54 actuates the arm 53 of a cracking lever 52, 53 and a lug 49 operates the switch 38 breaking circuit through the motor 30 and magnet 77 thus stopping the chain and allowing the carriage to be restored to its starting position by a mass 91. During the carriage return movement the gear 58 rolls along the chain 55 as the disc 96 is rotated until the peg 102 again depresses the starting switch 85. The various lugs on the chain and the scoring tool are duplicated. Specification 114,977 is referred to.