Automatic boiler with internal hopper - has regulator plate with tongue extending across throat to thin fire-bed

摘要

The boiler has an internal hopper provided with an extended throat arranged to supply fuel down a sloping support (13) to a fire bed. A regulator (12) extends across the throat for controlling flow of fuel and has one or more tongues (23) arranged to prevent the flow of fuel at one or more corresponding regions of the throat. The regulator is positioned such that the effective throat width is generally less than 40 mm. The tongue or tongues have a width approx. equal to three quarters the length the sloping support extends beyond the regulator.