Patent
Roller shutter with controlling device.
TLDR
In this article, an inductive sensor is mounted on a lateral edge of the shield which detects tye guide edges of the guide rail, and a controller with a sensor mounted on the door plate detects the position of the sensor wrt.Abstract:
The roller door has a flexible, non-metallic hanging part (2) with a lower closure edge which rests tight against a base surface in the closed position and which has a shield (7) with a guide element (11) which runs in a lateral guide rail (9). The shield is deflected out of the door opening plane by a force acting upon on the door plate. A controller with a sensor (14) mounted on the door plate detects the position of the sensor wrt. the guide rail. The sensor can be an inductive sensor mounted on a lateral edge of the shield which detects tye guide edges of the guide rail.read more
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Patent
Door with a safety antenna
TL;DR: In this article, a door system includes an antenna-based proximity sensor with a releasable electrical connector that enables the sensor to function with a breakaway feature of the door.
Patent
System for shielding a building opening
TL;DR: In this article, a rotating support shaft with a number of winding reels for carrying straps that are connected to an upper edge of a flexible shielding material (7) is described.
Patent
Quick-opening door
TL;DR: In this paper, a flexible canvas is secured to a motor-driven drum and provided with vertically aligned arrangements of abutment elements that are guided in vertical uprights of the door.
References
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Patent
Apparatus for controlling window blinds and awnings
John Archer,Haakansson Sven +1 more
TL;DR: In this paper, an apparatus for controlling a D.C. motor used in the lifting and lowering operation of a window blind or an awning, pulses induced as a result of rotation of the motor rotor are used for delivering signals to a signal receiving means.
Patent
Audio warning system for a door or window
TL;DR: An audio warning system for a door or window has a switch trigger arranged to provide an output signal when the door is illicitly opened and which is connected to a loudspeaker noise source that is mounted in a hollow portion of the door as mentioned in this paper.