From the 1982 Collins Supply Catalog.
Category Archives: Valve
Valves, Collins, 1972
From “Laboratory manual for physiology of exercise”, by Laurence E. Morehours, Published by C.V. Mosby, 1972, page 88.
Mask and Valve, Tissot, 1923
A mask with a 2-way Tissot valve. From La Presse Medicale, 1923, n1, page 3.
Valve, 3-Way, 1923
A three-way valve. Possibly a Collins. Source was not explained within the accompanying text. From La Presse Medical, 1923, n1, page 3.
Tissot Valve, 1904, with Animal Mask, in Use
A Tissot-designed valve with an animal mask, shown in use on a dog. Used one-way valves so exhaled air could be collected and analyzed. From J. Tissot, “Nouvelle méthode de mesure et d’inscription du débit et des mouvements respiratoires de l’homme et des animaux”, Journal de physiologie et de pathologie générale, 1904, vol 6, pp. 692.
Breathing Valve, Tissot, 1904, with Mask for Animals
A Tissot-designed valve with an animal mask. Used one-way valves so exhaled air could be collected and analyzed. From J. Tissot, “Nouvelle méthode de mesure et d’inscription du débit et des mouvements respiratoires de l’homme et des animaux”, Journal de physiologie et de pathologie générale, 1904, vol 6, pp. 691.
Nasal Breathing Valve, Tissot, 1904, Expiratory Switch
Another version of the nasal breathing valve designed by Tissot with an electical switch that was activated during expiration. Used one-way valves so exhaled air could be collected and analyzed. From J. Tissot, “Nouvelle méthode de mesure et d’inscription du débit et des mouvements respiratoires de l’homme et des animaux”, Journal de physiologie et de pathologie générale, 1904, vol 6, pp. 691.
Nasal Breathing Valve, Tissot, 1904, In Use
A nasal breathing valve designed by Tissot. Held in place by a headpiece. From J. Tissot, “Nouvelle méthode de mesure et d’inscription du débit et des mouvements respiratoires de l’homme et des animaux”, Journal de physiologie et de pathologie générale, 1904, vol 6, pp. 689.
Nasal breathing valve, Tissot, 1904
A nasal breathing valve designed by Tissot. Used one-way valves so exhaled air could be collected and analyzed. Included an electical switch that was activated during inspiration. From J. Tissot, “Nouvelle méthode de mesure et d’inscription du débit et des mouvements respiratoires de l’homme et des animaux”, Journal de physiologie et de pathologie générale, 1904, vol 6, pp. 690.
Valve, Rubber Flap, 1915
From Carnegie Institution of Washington Publication, Issue 216, Comparisons of Respiratory Exchange, 1915, page 69.