Historical information

This device was designed by W E Collison for self administration of oxygen therapy, particularly in the home. By his own description "It presents none of the tiresome and irksome features associated with medical apparatus and is readily understood by patients." Registration number: 772839 and 785517 Patent number: 415437

Physical description

Metal tubing designed to attach to an oxygen cylinder which leads to a number of gauges and continues on to a metal head which holds two glass bulbs. Glass bulb on left is amber in colour and the glass bulb on the right is clear.Both bulbs have residue on the inside. Between the bulbs is a connecter that leads to red rubber tubing that is fluted toward the end.