The Boc Group, Inc.

The Commonwealth Industrial Gases Ltd.

Peter A Warren

Sherif Latif

Ian S Fitzpatrick

Christopher S Nieass

Evelyn A Shervington

A coin-freed vending machine for cylinders of compressed gas comprises an outer cabinet having a door-opening, a storage chain conveyor for cylinders within the cabinet and a rotatable transfer cradle between the door-opening and the conveyor preventing access to the conveyor. The transfer cradle is furnished with sensors enabling an empty cylinder placed in it through the door-opening to be identified by a data processor, following which the cradle and conveyor are operated to load the empty cylinder into the conveyor and to unload a full cylinder from the conveyor for extraction through the door-opening.

Vending machine

A method of automatically mixing predetermined quantities of liquid organic compound and liquid propellant is disclosed. A metering cylinder is filled from a storage reservoir of a liquid organic compound and then disconnected from the reservoir. Then one end of the metering cylinder is connected to a source of liquid propellant, the other end is connected to a mixing vessel, and vapour pressure of the liquid propellant is utilized to force all of the liquid organic compound into the mixing vessel, together with a predetermined volume of liquid propellant.

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Beecroft, Australia

Peter A Warren