Curtain Lock is specifically designed to prevent divider curtains from falling in the event of a failure of the drive motor. Instead of a strap that reels in and out that locks on an over speed condition similar to the model 1100 Safe Strap, the Curtain Lock mounts directly to the divider curtain drive shaft when the drive shaft experiences an over-speed condition, the Curtain Lock will immediately lock and prevent the curtain from falling. The 2 3/8” O.D. drive pipe is slid through the Curtain Lock rotating member and secured using a ½” diameter bolt. The Curtain Lock housing is attached to the curtain supporting structure with a bracket to prevent the housing from turning. Maximum hanging curtain weight shall be 800 lbs. Curtain Lock shall be designed to lock in either direction to allow for flexibility in installation.