GB228196A - - Google Patents

Abstract

228,196. Libbey Glass Co., (Assignees of Kadow, A., Parker, A. C., and Schreiber, C. W.). Jan. 26, 1924, [Convention date]. Blowing.-Relates to a blowing " spindle " of the kind used in the machines described in Specifications 111,122 and 142,765, and consists of a construction to reduce the weight, size, and operating force required by the mechanism for operating the spindle.. Operating mechanism. The machine consists of a number of units supported by a rotating frame, and each unit carries two spindles. The spindles 17, Fig. 1, are carried in bearings 16 on a yoke 15 which is secured to a hub 14 journaled in the frame. The hub has teeth 18 engaging a rack 19 which can be moved transversely by a bell-crank lever 26 oscillated by a cam groove 30 on the central drum 11. The cam governs the oscillation of the spindles about a transverse axis as the machine rotates. Longitudinal rotation of the spindles is effected by means of a bevel gear 45 which is carried by a sleeve. 46 rotatably mounted within the hub 14 and is geared through pinions 42, 43 with teeth 40, Fig. T, formed in the casing 90 of each spindle. A shaft 47 journaled in the hub 14 is slidable through, but drives, the sleeve 46, and is driven by a sleeve 50 mounted in a sliding block 51. The block carries pinions which gear with racks 57, 58 fixed on the drum 11 when the block is forced inwards by a spring 59, but are disengaged when a roller 63 makes contacts with cams fixed to the drum. Thus these cams control the speeds and times of rotation of the sleeve 50 and, therefore, of the longitudinal rotation of the spindles. The relative movements of the different portions of each spindle are produced by the actuation of a bell crank lever 71 mounted on each yoke and engaging a collar 70 formed in the casing 90 of the spindle. The lever 71 is rocked by longitudinal movement of the shaft 47. This movement is produced by a slide 83 which engages a collar 81 on the shaft. The collar is moved radially by a roller 84 which engages a cam groove 85 in a plate 86 secured to the central drum 11. Spindle construction. The outer casing 90 of the spindle has fixed within it an inner casing 92, Fig. 7, on the outer end of which jaws 97, that grip the parison against a receiver 133, are pivoted. These jaws are connected by links to a sleeve 98 which slides on the inner casing 92 and is forced outwards by a spring 104 to close the jaws on the parison. When the outer casing 90 is moved downwards by means of the collar 70, screws 115 encounter the ends of slots 117 in the sleeve 98 and further movement of the casing compresses the spring 104 and opens the jaws. A plunger 147 slides within a socket in the receiver 133 and is held in its retracted position by a spring 150 surrounding its stem. When the casing is moved upwards by the collar 70, the end of the air pipe 132 makes contact with the end of the plunger stem and thrusts the plunger into the receiver. Air is supplied by a flexible pipe 126 to the pipe 132 which does not rotate with the spindle, escape of air being prevented by a packing gland 139.