TH5293A - Safety Lock for burglar alarm and emergency fire escape - Google Patents

Abstract

Security door latch with a long hollow box covered with latch The person inside, aka, was able to reach in and open the lock. But outside people can't reach the latch, the latch box can be folded when not in the working position. And in this non-use position there is also a lid to cover the mouth of the box This flap cover will open automatically when the cover is in the use position. To allow the hand to pass through the box and open and close the latch

Claims (1)

1. Security Bolt for Wrought Iron Door or Window, This safety bolt consists of two U-shaped components, assembled into a hollow cylinder, with one end of the two U parts screwed into the sides. Of a polygonal base with four walls Front with bottom open This polygonal base is called the bolted box base. The other end of the two U parts is screwed to the sides of the square cylinder block with four walls. The other two hollow open sides This square cylinder piece is called a bolted box cover. This latch box cover is hidden inside a tag: