FIELD: physics, alarm.
SUBSTANCE: device comprises support, poster strip, two mechanised reeling shafts. Shafts are equipped with driving facilities of periodic double-sided scrolling of poster strip along support and facilities used to retain two ends of poster strip. On the side of poster strip support is arranged as curvilinear, at least on part of its surface. Support comprises laced wall. Laced wall creates front wall of chamber. Chamber is intended for air injection in process of shafts actuation.
EFFECT: makes it possible to exclude breakage of drive shafts and damage of poster strip in process of its scrolling along curved support.
17 cl, 6 dwg
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