Patent GB-534625-A (GB)
Title: Drive mechanism for glass forming machines
IPC: C03B9/40
Filed: 1939-09-01
Abstract: 534,625. Glass manufacture. G. M. S. CORPORATION. Sept. 1, 1939, No. 25150. Convention date, Sept. 3, 1938. [Class 56] [Also in Group XXIV] Relates to a glassware-forming machine in which the drive mechanism includes Geneva wheels for imparting intermittent movement to the mould carriers. According to the invention, means are provided for varying the relation between the periods during which the mould carriers are moving and those during which they are at rest. Figs. 1 and 2 illustrate a machine in which the moulds are supported by tables 3 which rotate on vertical columns 2 and are driven by rotating arms 9a. The arms are provided with rollers 8 which engage in slots 6 in Geneva plates 5 secured to the tables, lobes 9 on the arms engaging in recesses 7 in the plates to lock the tables between the intermittent movements. The arms 9a are rotated by a driving shaft 19 through gear wheels 13, the latter being provided with depending rollers 12 which engage in slots 11 in the arms. The shaft 19 and the wheels 13 are supported by a plate 15 which is adjustably secured to the bedplate 1 of the machine. The adjustment allows the distance between the axes of the wheels 13 and the axes of the arms 9a to be altered in order to alter the length of the dwell periods during which the mould tables 3 are at rest. The Specification, as open to inspection under Sect. 91, describes a double table machine in which the parison moulds are inverted to receive charges of molten glass from a feeder and are reverted before reaching the transfer position. The parison moulds are opened by a pneumatic cylinder and closed by a fixed cam, and the finishing moulds are opened and closed by pneumatic cylinders. Plungers 128, Fig. 13 (Cancelled), in cylinders 130 secured to parts of the machine frame, are arranged to engage parts of the mould operating mechanism when they are depressed periodically by air admitted to the cylinders by a timing-device. If the moulds are not fully opened or closed, the plungers 128 fail to make contact with the co-operating parts, and a clutch in the driving mechanism is opened to stop the rotation of the mould tables. After a parision is blown in the finishing mould, the mould opens and leaves the finished article 132 standing on the mould bottom. The article is removed by a gripping device 131, which deposits it on a conveyer 158. The gripper is operated by a pneumatic cylinder 133 carried by a vertical shaft 137 pivoted to parallel arms 138, 139, which are swung through 180 degrees in a vertical plane by a rack 143 operated by a pneumatic cylinder 145. Two of such gripping devices are mounted on a table 146 which is rotatable on a base 147 and is oscillated through a limited angle by a pneumatic cylinder. The two devices work in opposition, so that one is gripping an article while the other is depositing another article on the conveyer, and the movement of the base 146 always brings the gripper to the same point. One pair of arms 138, 139 may be longer than the others in order that the articles may be deposited in two rows on the conveyer. This subject-matter does not appear in the Specification as accepted.