Patent GB-381675-A (GB)
Title: Semi-automatic electrically operated filling and delivery apparatus for liquid or pasty or pulverulent products
IPC: B65B57/06
Filed: 1931-08-28
Abstract: 381,675. Weighing and filling apparatus. VAVERKA, A., 4, Rue Rollon, Rouen, France. Aug. 28, 1931, No. 24224. Addition to 355,512. [Class 143.] The weighing and filling apparatus described and claimed in the parent Specification is modified by effecting the opening of the feed cock 1, Fig. 1, by means of an electromagnet or electric motor connected to the plunger 10 and adapted to pull the plunger down to open the feed cock, the electromagnet or electric motor being controlled by a contact operated either manually or by the placing in position of the receptacle to be filled. The plunger 10 when pulled down as described below, to open the feed cock 1, is retained by a bolt 27. The liquid or other material flows rapidly into the receptacle resting on the scale pan 17, until the depression of the scale beam 18 allows electric contacts 23, 24 to close and energize an electromagnet 25. The bolt 27 is thereby released and the plunger rises and reduces the feed, but before complete closure of the cock the return oscillation of the scale beam re-opens the contacts 23, 24, de-energizes the electromagnet 25 and allows a second bolt 30, Fig. 2, to retain the plunger 10. When the weight is made up, the contacts 23, 24 again close and the electromagnet 25 withdraws the second bolt thereby allowing the cock to cut off the feed. At the same time a thickened portion of the plunger strip 33 opens the circuit at contacts 35. A projection 33<1> on the strip temporarily opens the circuit immediately after the release of the bolt 27. The cock 1 is opened automatically when a receptacle is placed on the scale pan. To effect this action, the scale-pan support contains a spring-supported rod 38, Fig. 6, which is depressed by the empty receptacle. The depression of the rod closes contacts 40, 41 and energizes a relay bobbin 49 fed from a transformer 51. An armature 54 is attracted and maintained by a ratchet so as to close contacts 55 in the circuit of an electromagnet 46. The core of the electromagnet is attached to the foot of the plunger 10, Fig. 1, which is thereby drawn down to open the feed cock 1. When the scale beam tips, the contacts 23, 24 close, and energize a second relay bobbin 50 thereby withdrawing the armature 54, de-energizing the electromagnet 46 and allowing the feed cock to close. To avoid maintaining the current through the electromagnet 46 during the whole of the weighing, and to permit the feed cock to close in two stages the system of plunger-retaining bolts previously described may be employed with the magnet 46, the relay bobbin 50 being omitted. The scale pan 17 may be replaced by a weigh hopper provided at the base with a pivoted discharge gate, and the opening of the feed cock may be automatically effected by an electric contact closed by the mouthpiece of the receptacle placed beneath the weigh hopper, or may be effected by pressing a finger knob. The discharge gate of the weigh hopper is automatically opened by an electromagnet controlled by a contact bar on the plunger 10. The supply may be controlled by two pivoted feed flaps opened by an interposed sliding wedge. When liquids are being weighed, drops are removed after the closure of the feed cock through an adjacent suction tube, the suction being controlled by an additional contact bar on the plunger. When a long stroke of the plunger 10 is required for opening the feed cock the electromagnet 46, Fig. 6, is replaced by an electromagnet 65, Fig. 9, the armature 66 of which rocks an electric motor 68 so as to couple up continuously-driven friction gearing 70 in order to pull down the plunger and open the feed cock.