GB725784A - Improved dispensing device - Google Patents

Abstract

725,784. Dispensing measured quantities. IRONSIDE, J. G. S. Oct. 8, 1953 [April 1, 1953], No. 27725/53. Class 106 (5). A device for delivering predetermined quantities of liquid (or finely divided solid) from a receptacle 13, Fig. 1, comprises a first chamber 19, Fig. 3, connected by a bore 23 with a second chamber 24, an air vent 26 extending from the second chamber upwards to communicate with the atmosphere at a point above the level of the orifice in the receptacle, a connection 21 between the first chamber and the atmosphere open at all times, a member 27 extending through a bore 29 and adapted to seal the latter and the bore 23 alternately when it is raised and lowered, and a port or ports 31 leading to a passageway in the member 27. The member 27 is urged to the position shown by a spring 33 and is provided with two'arms 36 whereby it may be raised by a container for the measured quantity to a position in which sealing rings 28 close the bore 23 and the liquid contained in the second chamber 24 may flow into the passageway through the ports 31. When the member 27 is returned to its original position by the spring, liquid flows from the receptacle 13 until it reaches the level of the orifice in the receptacle. The latter is engaged by a sealing ring 20 having a vent forming the connection 21, and if it is not of the correct size, an adapter comprising a funnel-shaped moulding fitted with a sealing ring may be used. The two chambers are connected by a screw thread and a sealing ring 25 and are supported by a bracket 16 secured to a projection 14 by a spring-loaded plunger 15, a rounded ridge 18, and a corresponding groove in the projection 14. The latter is connected to an upright 11 fitted with a wall plate 10 and a pivoted member 12 provided with a resilient covering to engage the bottom of the receptacle. Alternatively, the upright may be provided with a spring-loaded, vertically-movable pad to engage the bottom of the receptacle and a clamp by which it may be attached to a horizontal shelf or counter. The ports 31 may be replaced by a number of small holes. Drips are trapped by a lip 40 and ejected by air expelled through holes 41 when the member 27 and a telescopic sleeve 34 secured thereto are raised.