The electronic siren did not clog with snow in the winter (NYPD cops would beat the roof mounted siren with their nightsticks to break off the ice.) Federal Signal emerged as the largest manufacturer and makes, in University Park, IL, the "Q" siren to date. B&M still makes their "Super Chief" to date in their California facility.
The electronic warning device did not become clogged with snow during the winter (NYPD officers would use nightsticks to dislodge the ice from the roof-mounted siren.) Federal Signal has established itself as the primary manufacturer and produces, in University Park, IL, the "Q" siren. B&M continues to produce their "Super Chief" at their California facility.