Blind or curtain suspension system

A blind/curtain suspension, comprising:

• a support;
• at least one suspension device carried by said support and being arranged for movement relative to said support for opening and closing the blind/curtain;
• a first stop and a second stop onto which said suspension device impinges at respective ends of its range of motion;
• an electric motor coupled to said suspension device and operable for causing movement of the suspension device relative to said support;
• and,
• a controller including means for deriving a value indicative of position of said suspension device relative to said first stop, means for detecting an increase in current to said electric motor associated with said suspension device impinging on said second stop, means for storing said value when the increase in electric motor current is detected and means for regulating said electric motor during subsequent operation of said system in dependence upon said value so stored for interrupting current to said electric motor when said value indicative of an actual position of said suspension device reaches a predetermined, or settable, value between zero and said value so stored.

An electronic controller for use in a blind/curtain suspension system comprising a support:

• at least one suspension device carried by said support and being arranged for movement relative to said support for opening and closing a blind/curtain;
• an electric motor coupled to said suspension device and operable for causing movement of said suspension device relative to said support;
• and, a stop and a resilient component onto which said suspension device impinges at one end of its range of motion, said resilient component being located between said suspension device and said stop so that said resilient component is resiliently stressed as said suspension device approaches said one end of its range of motion;
• said electronic controller comprising means for detecting an increase in current to said electric motor associated with drive from said electric motor being taken up by said resilient component and means for interrupting current to said electric motor when the increase in the current in said electric motor is detected.

A blind/curtain suspension system, comprising:

• a support;
• at least one suspension device carried by said support and being arranged for movement relative to said support for opening and closing a blind/curtain;
• a stop onto which said suspension device impinges at one end of its range of motion;
• an electric motor;
• a drive train coupling said electric motor to said suspension device so that said electric motor is operable for causing movement of said suspension device relative to said support, said drive train including a resilient component being resiliently stressed by said electric motor when said suspension device impinges on said stop;
• and,
• a controller including means for detecting an increase in current to said electric motor associated with said electric motor resiliently stressing said resilient component and means for interrupting current to said electric motor when the increase in the current of said electric motor is detected.