Abstract: A retractable barbecue grill trolley has a first plate and a second plate pivotally linked thereto to form a foldable base plate and four legs pivotally attached to the base plate. Each leg has an upper and a lower post connected by a leaf spring deposited in the lower post. Each upper post has an fixing mechanism to be fixed by a pivotal supporting beam having a plurality of threading holes.

Abstract: A control circuit for a forced-air heating system comprises a silicon diode that is positionable in thermally-conductive relationship with the interior space of a furnace plenum. A current source supplies current to the silicon diode, and the potential drop across the silicon diode is sensed. The operating speed of the blower is controlled in response to the voltage drop across the silicon diode in a manner such that when the temperature in the plenum is below a first level, the blower is not driven; when the temperature reaches the first level, the blower is driven at a first speed; and when the temperature reaches a second level, which is higher than the first level, the blower is driven at a second speed, which is higher than the first speed.

Abstract: The invention concerns a device for guiding the sample flow in an analyzer, especially in an atomic absorption spectrophotometer, in order to accomplish an essentially even flow front. Consistent with the invention, the burner (11) has been equipped with a flow divider (12) that due to its advantageously chosen construction and manufacturing material also works as a drop eliminator that removes the harmful drops, which are present in the sample spray.