Professor Ombredanne's Ether Apparatus

Model signed "COLLIN DÉPOSÉ / n°13686 / FRANCE", 1908-1910.
The only anaesthesia machine used from 1909 to 1938, it continued to be used until 1960.
Designed by the French surgeon Louis Ombredanne (1871-1956), who practised for 24 years at the Hôpital des Enfants malades in Paris. In 1907, Charles Nélaton, whose assistant he was, moved by two chloroform anaesthesia accidents, asked him to work on an anaesthetic inhaler offering greater safety. He first manufactured it himself and then had it marketed by the Collin company. In 1908, Collin filed a patent for this device intended for general anaesthesia with ether, presented by Louis d'Ombrédanne to the surgical society on 11 March 1908.
The apparatus can be dismantled in its case and includes :
A spherical chamber equipped with a "needle-index" with a graduation from 0 to 8, a mask on which a leather reinforcement could be adapted, a bag in baudruche bladder (in pig bladder) intended for the confined air, an obtuse angle connection (interposed between the mask and the sphere, this one allowed to reduce the fatigue during the operations in lying down mode) The mask and the sphere bear the patented mark of Collin.
Beautiful model in good condition with its accessories, in its original box, with its notice n° 56 of the House Charrière & Cie (4 p. and 2 fig.)