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Application filed by Julius BrotschneiderfiledCriticalJulius Brotschneider
Application grantedgrantedCritical
Publication of AT29946BpublicationCriticalpatent/AT29946B/en
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durch einen drehbaren Haken (11) festgehalten werden, der bei geöffneter Tür durch einen Elektromagneten 0) angezogen wird und in dieser Lage das Herabfallen der Platten (13). ermöglicht.
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be held by a rotatable hook (11) which is attracted by an electromagnet 0) when the door is open and in this position the panels (13) fall down. enables.
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AT29946D1906-08-211906-08-21
Device for the automatic Amziegen unauthorized opening of doors in hotels, houses and the like. like
AT29946B
(en)
Sliding gate for halls built into the water to shut off Sliding gate for halls built into the water to close the hall opening against the water. the opening of the hall against the water.
Automatically report intrusion attempts and fire Automatic intrusion attempts and fire-reporting rigid protective surface. de rigid protective surface.