Patent GB-293750-A (GB)
Title: Improvements in or relating to apparatus for handling glassware
IPC: C03B35/12
Filed: 1928-06-28
Abstract: 293,750. British Hartford-Fairmont Syndicate, Ltd., (Assignees of Lorenz, E. H.). July 11, 1927, [Convention date]. Charging.-Relates to a device for transferring glassware from a conveyer-belt to a leer by means of transfer arms which swing about horizontal axes, as described in Specification 274,068. According to the invention, the transfer arms are operated by a continuously driven shaft, a clutch being provided for temporarily interrupting the movement of the arms as they take up and set down the ware, the clutch being operated by the forming-machine on which the ware is made. The device comprises two transfer arms 29, Fig. 1, which carry the glass article from a conveyer belt B to a leer belt 3, the conveyer receiving the articles as they are lifted out of the moulds of a forming-machine. The transfer arms 29 swing on horizontal axles carried by brackets 25 which depend from a carriage 15. This carriage rotates about a vertical pivot pin carried by an overhead frame 6, and is provided with rollers 17 which ride on a track 13 forming part of the frame 6. The construction of the arms 29, and of the means for opening and closing their gripping devices, are similar to those described in Specification 274,068. Each arm is swung to and fro bv a chain 77 passed around a sprocket wheel 78 secured to the hub of the arm, one end of the chain being connected to a crank 68, while the other end is connected to the piston rod 79 of a cylinder. Constant air pressure is maintained below the piston of the cylinder, so that the piston exercises a constant pull on the chain 77. Thus the movement of the crank 68 swings the arm in one direction, while the pressure in the cylinder swings it back again. Two cranks 68 are secured at opposite ends of a shaft 83, Fig. 4, and are displaced at an angle of 180 from one another, so that the arms 29 are always swinging in opposite directions. The shaft 83 rotates within a sleeve 84, journaled in bearings 85, on which wormwheel 86 is mounted. This wormwheel is driven from a motor 102 through a speed-regulating gear 101. The cranks 68 are intermittently connected to, and disconnected from, the rotating sleeve 84 by means of a spring- actuated pawl 103 which is pivoted on one of the cranks 68 and engages a ratchet-wheel 104 fast on the sleeve 84. The pawl is disengaged from the ratchet wheel twice during each rotation by means of upper and lower stop plungers 105 which lift the pawl out of engagement with the ratchet wheel. The plungers are moved by pistons 108 against the action of springs, and the pistons are actuated by compressed air. In operation, the supply of air for actuating the stop plungers 105, and other parts of the apparatus, is controlled by a valve which is operated preferably by the shears of the feeder which supplies glass to the forming-machine, so that the arms 29 operate in time relation with the production of ware. Two transfer arms 29 are preferably used and each arm places ware on one half of the width of the leer belt. The carriage 15 is oscillated horizontally, in order to distribute the ware transversely of the leer belt, by a barrel cam 114 which engages a vertical stud 132, Fig. 1, secured to the frame. In order that the ware may be presented at regular intervals and in proper position to be grasped by the transfer arms, an index wheel 174 is used to push the glass articles off the conveyer belt B on to a shelf or table 180 where they are in position to be gripped. The wheel 174 is supported above the conveyer belt by a bracket 155 and is rotated step by step in synchronism with the transfer arms. The conveyer belt B may be dispensed with and the arms 29 arranged to remove the articles directly from the moulds of the forming machine.