Following the London world exposition in 1851, the new applied
arts movement in manufacturing and craftsmen circles led to a strong
interest in collections of models and patterns. The folder »Thür-
und Fenster-Verschlüsse« with parts for closing doors
and windows was compiled by the Viennese architecture professor
August von Siccardsburg and appeared in 1876.
The folder was intended for use in trade schools as a model for
carpentry and mechanical work. Many technical details are depicted,
often in full size, on 52 large-format plates.
Today this collection of plates should be just as interesting for
preservationists as it is for carpenters and mechanics who are entrusted
with restoring old buildings.