Introduced in 1927 by British physician H. Whitridge Davies to hasten the inhalation of ether during anesthesia and for the treatment of respiratory failure. It was made by Sparklets, Limited, of London from the 1920s through the 1950s. These devices were marketed to doctors, patients, and public service departments. The Sparklet was used with a compressed gas cylinder of oxygen (O2), carbon dioxide. Recommended for inhalation therapy in cases of asthma, whooping cough, and pneumonia. Squeezing the lever would puncture the cylinder, releasing the gas at a predetermined rate.
This was also used as a resuscitation device, delivering carbon dioxide for cases of asphyxiation, drug overdose, shock, and drowning. In the 1950s, greater understanding of respiratory physiology made this use of CO2 obsolete.