Primary air intake regulator device, with external control, essentially characterized by being constituted by a handle that operates an arm twice bent at right angles, whose end is housed in the groove of a flat piece that constitutes the obturator and that presents two other grooves, one quarter of a circle each, which are superimposed or not on two circular sectors through the bottom of a bushing that closes the entrance mouth of the burner of the apparatus and, that, when the outer handle is actuated, causes the greater or lesser degree of superposition of both grooves, perfectly regulating the passage of primary air. (Machine-translation by Google Translate, not legally binding)
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