Oxylet apparatus

OXYLET SMALL EMERGENCY APPARATUS
(R. H. DAVIS’S Patent)

Figure 1 shows a small, self-contained breathing apparatus for short emergency use in poison gas or underwater. This apparatus includes a watertight breathing bag with a “Protosorb” CO₂ absorbent canister and “Oxylet” capsules. Breaking the seal of the “Oxylet” instantly fills the bag with oxygen. The equipment also has a mouthpiece and noseclip and is worn around the neck with a waist-belt for stability. The apparatus can have one or more “Oxylets,” and illustrations show single and double sets. A connection and non-return inlet valve are also included, allowing the breathing bag to be refilled with oxygen from an external source, like a cylinder, to extend usage time.

Figure 2A & 2B describes a watertight breathing bag connected to an “Oxylithe” canister. “Oxylithe,” a mixture of Sodium and Potassium peroxides, absorbs moisture from breath and releases oxygen, with the alkaline residue absorbing CO₂ . To ensure immediate oxygen availability, as “Oxylithe” takes a couple of minutes to react sufficiently, an “Oxylet” capsule provides an initial charge of high-pressure oxygen when its seal is broken.

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