1 FIRST IN SERVICE

electrical equipment, namely, plugs, current traps, snap switches and electrical wiring boxes; electrical controllers; switches; industrial controls and analyzers; environmental controls; alarm systems comprised of audible electric door chimes, audible signalling units, sound responsive timing and switching units for controlling conventional lighting, all of the foregoing sold as a unit for use in domestic, commercial and industrial applications; power circuit breakers, humidity controls and fire and burglar alarms; and electrical temperature controllers for use in water systems in domestic, commercial and industrial applications