1851 Great Exhibition: Official Catalogue: Class V.: Amedee Francois Redmond
From Graces Guide
66. REDMOND, AMEDEE FRANCOIS, Birmingham — Importer and Inventor.
Working model of a steam-engine, showing three different constructions of slide-valves: short slide, and long D valve; and the exhibitor's patent double independent slide valve, to prevent back pressure from the exhausted steam. This model is worked by steam, and is furnished with an indicator, to show the comparative effect of different slide-valves.
Working model, in wood, of the exhibitor's patent machine for dry-cementing envelopes. By this process the envelopes can be immediately folded without requiring the ordinary tedious process of drying.
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