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.
These electric motors are designed for woodworking equipment such as table saws, planners, etc. Totally enclosed designs prevent motor problems caused by wood dust and shavings.