Abstract:
A device for monitoring motion of a movable closure arranged for travel between limit positions, comprising an absolute position encoder for identifying whether the closure is in one of a plurality of sectors of travel, a relative position encoder for monitoring the speed and relative position of the closure, and a drive means for operatively coupling the relative position encoder and the absolute position encoder to the closure, such that there is a fixed relationship between motion of the closure and movement of both encoders, wherein the absolute position encoder features an adjustment assembly comprising a first element and a second element, the first element being selectively adjustable in position relative to the second element to adjust the absolute position encoder without movement of the drive means or the relative position encoder.
Abstract:
The present invention relates to drive assemblies, and particularly to drive belt and drive chain assemblies for operation of doors, gates or barriers. The invention provides a connection for a flexible toothed belt or similar, including a body having an internal recess with a shaping complementary to that of the toothed belt, configured to allow an end portion of the belt to be engaged therein in a direction transverse to the belt longitudinal direction, so to retain the belt against disengagement in the longitudinal direction. Further, the invention provides a drive assembly including a rail or track, a trolley for connection to the door, gate or barrier, the trolley mountable to run along the rail or track, a longitudinal drive means comprising a chain or belt, connectable in a closed loop arrangement around or within the rail or track, the trolley provided with an engagement means for selective engagement between the trolley and the longitudinal drive means, whereby the engagement means includes an engagement member arranged for selective movement in a direction substantially transverse to the longitudinal direction of the longitudinal drive means and in a direction less than 45° from the plane of the loop of the longitudinal drive means. Also provided is a drive assembly including a partially enclosed track, a trolley for connection to the door, gate or barrier, the trolley mountable to run within the partially enclosed track, a longitudinal drive means, such as a chain or belt, connectable in a closed loop arrangement within the partially enclosed track and engageable with the trolley, the trolley provided with wheels adapted to run within and supported by the partially enclosed track.
Abstract:
Drive assembly for a door, gate or barrier, having a rail or track, a trolley for connection to the door, gate or barrier, mountable to run along the rail or track, and a longitudinal drive having a chain or belt connectable in a closed loop arrangement around or within the rail or track. The trolley is provided with an engagement mechanism for selective engagement between the trolley and the longitudinal drive mechanism, whereby the engagement mechanism includes an engagement member arranged for selective movement in a direction substantially transverse to the longitudinal direction of the longitudinal drive and in a direction less than 45° from the plane of the loop of the longitudinal drive. The engagement member includes or cooperates with a cam part arranged for selective rotation about the engagement member, and a camming cooperation occurs between the cam part and the trolley body for converting rotation of the cam part about the engagement member into the required movement of the engagement member.
Abstract:
An integrated controller for an operator unit for powering an overhead garage roller door or roller shutter is described. The operator unit comprises a motor, an output drive assembly, a timing assembly unit, and a clutch assembly for providing selective engagement between motor powered operation and manual operation (provided by a chain rotating a chain wheel). The motor is arranged to drive a shaft which, in turn, provides drive to the roller door or shutter assembly (not shown), which includes an axle around which the roller door or shutter is wound. The integrated controller comprises an inverter for receiving a single phase power supply and supplying three phase power to drive the motor; and a drive controller in operable association with the inverter for providing active management of the operation of the motor.
Abstract:
A control system for controlling individual mirrors in a MEMS-based optical switching fabric is presented. The control system includes a position sensitive detector positioned to receive a control beam reflected from individual mirrors of a first mirror array. In some embodiments, the control beam can be time-multiplexed with a calibration beam. The position of the control beam corrected in response to the position of the calibration beam can be compared with a position calculated on the port assignment of the individual mirrors in order to provide feedback to a feed-back based control system for the individual mirrors.
Abstract:
A device for monitoring motion of a movable closure arranged for travel between limit positions, comprising an absolute position encoder for identifying whether the closure is in one of a plurality of sectors of travel, a relative position encoder for monitoring the speed and relative position of the closure, and a drive means for operatively coupling the relative position encoder and the absolute position encoder to the closure, such that there is a fixed relationship between motion of the closure and movement of both encoders, wherein the absolute position encoder features an adjustment assembly comprising a first element and a second element, the first element being selectively adjustable in position relative to the second element to adjust the absolute position encoder without movement of the drive means or the relative position encoder.