Improvements in Automatic Catchers for use with Tinning Pots

14,018. Maskrey, A. J. June 21. Tinning and similarly coating metals by dipping. -Relates to automatic machines for catching and removing the plates as they emerge from the rolls in a tinning - pot. The plate is caught by a gripper on the arm 10 which is loosely mounted on a continuously - revolving shaft 1, and is clutched thereto, as soon as a plate enters the grippers, by electromagnetic means. When the arm is moving over, it is uncoupled from the shaft and returned by frictional contact with the spring face of a drum 48, which is driven in the opposite direction to the shaft 1 by belting through the second shaft 57. The gripper, shown separately in Fig. 4, is mounted on the arm 10 at right angles as shown in Fig 1, or parallel thereto if the machine is placed at the end of the pot. The plate rises between the guides 25, 29 and strikes the switch lever 31, thereby breaking the circuit of an electromagnet 43, which liberates the pawl 15 that connects the arm 10 to the shaft. As the arm turns, a switch thereon, normally held open by an adjustable stop 66, closes and completes the circuit to the electromagnet 23, which then attracts its armature 27 on the pivoted arm 22 and grips the plate. At the end of the stroke of the arm, the same switch is opened by a second stop to release the plate, and the pawl 15 is tripped by a fixed stop to disconnect the arm from the shaft. The removal of the plate allows the switch 31 to close the circuit of the electromagnet 43 which holds the pawl during the return. The arm 10 is counterbalanced and provided with a spring-hinged joint 72 at the middle.