The Burijflar-Proof Store- Window 



Let the burglar break the g!ass ami at once a curtain of steel is released from the top of the 

 window. It drops of its own weight the instant the glass is broken and one or more of the 

 wires in back of the window are fevered. The curtain is prevented from falling when the 

 window is being cleaned by a simple safety appliance. A sprocket wheel winds up the cur- 

 tain in a "set" position on the shaft. The breaking of one wire will drop the curtain 



■2:59 



