Orthographic component schematics displaying reinforced entryway doors and secure barred window profiles for an individual confinement unit in St. Petersburg 插畫檔

This technical engineering engraving provides detailed architectural specifications for the heavily fortified timber doors and multi-pane arched window assemblies designed for a standard correctional cell. Produced during the nineteenth century, these geometric layouts and cross-sections illustrate the security hardware and structural barrier methods utilized in Russia to enforce isolation and containment. The diagrams precisely map out multi-angle views of a paneled door equipped with an inspection peephole, a sliding meal hatch, localized mechanical locking systems, and a wall-mounted call signal, alongside detailed horizontal and vertical profiles of a robust window assembly engineered to maximize structural resistance while managing natural light within thick stone walls.