Control apparatus for air intake in oil burners of heating boilers

Apparatus for controlling the air intake through an air intake aperture provided in an oil burner in a heating boiler, the boiler including an oil pump and a blower, each of which has a rotary driving member associated therewith, comprising:

• a rotatably mounted coupling member adapted to be connected to at least one of said rotary driving members for rotation therewith, said coupling member further being adapted to extend substantially along the axis of the intake aperture;
• a first sleeve member detachably mounted on said axially extending coupling member in a normally fixed relation thereto;
• a second sleeve member mounted on said first sleeve member in coaxial relation thereto, said second sleeve member being axially slidable over said first sleeve member;
• at least one spring member including a pair of leg portions extending obliquely in opposite directions with respect to each other and a central portion interconnecting respective inner ends of said leg portions, said central portion comprising means for holding a weight member, and the respective outer terminal ends of said leg portions each being connected to a respective one of said first and second sleeve members, said spring thereby interconnecting the same;
• a weight member located within the holding means of said at least one spring member;
• and
• a closure member affixed to said second sleeve member;
• whereby upon starting the boiler, with consequent rotation of said driving members, said closure member moves axially away from the air intake aperture opening the same due to the centrifugal force acting on said weight member and upon stopping the boiler with consequent stopping of said driving members, said closure member moves axially towards the air intake aperture closing the same under the force of said spring member.