These preliminary sketches were put together before access to the patents was possible. Separate containers for H and O are depicted whereas the Meyer process does not separate the gases.

Right of title to the concepts outlined by the images below (apart from the Davy lamp) is retained by the author. Basic operating elements only are shown, aesthetics being ignored for simplicity.

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Postulated portable lighting unit employing lead-acid start up with solar back-up. Drive electronics in lid of vessel.

Section through Davy lamp.

Section through postulated lamp with 'gutter' to return condensed exhaust. Account of atmospheric condensation may have to be made.

Idealistic arrangement that has potential for thermal runaway. Internal coating of outer vessel ideally Starlite, inner vessel transparent.

'Domestic' arrangement.

Small industrial arrangement.

'Paddy-field' arrangement.

(ibid) An accident waiting to happen.

Large domestic unit, sonoluminescence optionally applied via lid.

Detail of pole-pack.