For the park, see Washington Square (Philadelphia). Washington Square West is a neighborhood in downtown, or Center City, Philadelphia, Pennsylvania.
Electric Door Strike (image from bigasterisk.com) A better solution for door security hardware during a power outage is to use electric strikes. An electric strike is a mechanically operated strike that releases a door when the mechanical part is activated.
Deltana SPDP278, Dust Proof Door Bolt Strike. This is an adjustable height dust proof door bolt strike. Most often used on installed on the door threshold for a surface mounted or flush bolt, to prevent the accumulation of debris in the bolt strike hole. This strike adds more security to door bolts.