| 摘要 |
<p>The control system is for electric-motor-operated venetian blinds. There is a motor for each blind, and group control for a group of blinds, together with facade control for all the motors for a facade at the same time. The individual control units are mounted parallel in a direct control circuit for a group, and their scanners can be bridged by switchgear devices activated by the group control, and disengaged by briding the scanners of the direct circuit. There are diodes in the bridging leads, to effect mutual uncoupling relative to other individual controls as in the main patent. The scanner has two switching levels. The first level directly engages relays, while the second level indirectly engages the relays via a time storage unit. This combines convenience of controls with a high degree of reliability.</p> |
