Patent GB-120907-A (GB)
Title: Improvements in Glass Shaping Machines.
IPC: C03B9/40
Filed: 1918-11-11
Abstract: 120,907. Hartford-Fairmont Co., (Assignees of Peiler, K, E., and Lorenz, E. H.). Nov. 20, 1917, [Convention date]. Blowing.-Relates to glass moulding and blowing machines of the rotary-table type, and particularly to duplex or multiple machines, and consists of interlocking mechanisms to secure the proper co-ordinate action of the parts and to allow any single element to be operated independently of the others. The invention is described as applied to a machine with two rotary tables 4. Fig. 1, similar mechanism being fitted to both tables. The tables carry the usual moulds 5 and are given an intermittent rotation so as to stop at the charging, pressing, and delivering &c. positions. Fig. 2 shows, in plan, the mechanism arranged below the left-hand table, corresponding mechanism being arranged under the right-hand table. The driving-shaft 8 actuates through worm and screw gearing, cams 13, 14, the former of which gives motion to a rocking lever 16, Fig. 2, and the latter acts against a roll 20 carried by the lever. The lever 16 actuates an arm 22 connected by a link 23 with an arm 24 pivoted on the hub of the table and carrying a spring bolt 26 adapted to engage any one of a series of notches 28 formed in blocks fitted to the underside of the table. The notches also serve to receive a locking-bolt 40 for holding the table stationary. The oscillating lever 16 drives the table at gradually increasing speed for the first half of its. motion, and during the second half is retarded by the cam 13. The bolt 26 is withdrawn by an arm 36 actuated by a cam 34 and adapted to hold it retracted during the return movement of the arm 24, but allows the table to be moved by hand. The locking-bolt 40 is withdrawn by a lever 43 actuated by a cam 47. The bolts 26, 40 are interconnected so that, if the latter does not properly engage a notch, the arm 36 cannot move to release the former. Both bolts may be released by a hand-lever 51, the inner end 52 of which holds back the lever 43, thus leaving the table free to be rotated by hand. The bolt 26 can be put out of action independently of the bolt 40 by operating a treadle connected to a rod 55 pivoted to an arm 54 fixed to the controller arm 36. The table is fitted with an adjustable band brake actuated by a cam connected with the cam 34 that actuates the bolt 36. The moulding-plungers 85 are of usual construction and are actuated by pneumatic cylinders 83 mounted on a cross-bar 3, Fig. 1, carried by standards 2. Air is supplied to the cylinders from a valve-chest 100 through an automaticallycperated valve, but the valve may be closed by hand when required. The cam operating the valve interacts with the cam 47 actuating the locking-mechanism so that the plunger cannot descend if the bolt does not properly engage. Rods 110 are mounted so as to move vertically with the plungers, and are connected to the tabledriving mechanism so that the table is stopped if the plunger does not rise owing to its sticking to the glass, or if the plunger should descend while the table is moving. The plungers are cooled by air circulation. The transfer of the blank may be effected automatically, and a blowing-head may be fitted to the machine and connected with the driving-mechanism by interlocking mechanism.