Appleton's dictionary of machines, mechanics, engine-work, and engineering . All the lamps as yet described are subject to one common evil, that of having the oil vessel, at allevents, within a few lines of the level of the burner; in a position, therefore, which throws the mostobjectionable shadow. A whole series c: contrivances have consequently resulted from the efforts olinventors to transpose this cistern either .) a considerable distance above the flame—when its shadowwould fall upon the ceiling of the room—or to a position much below the flame, when it would fall atthe foot of the lamp.
Appleton's dictionary of machines, mechanics, engine-work, and engineering . All the lamps as yet described are subject to one common evil, that of having the oil vessel, at allevents, within a few lines of the level of the burner; in a position, therefore, which throws the mostobjectionable shadow. A whole series c: contrivances have consequently resulted from the efforts olinventors to transpose this cistern either .) a considerable distance above the flame—when its shadowwould fall upon the ceiling of the room—or to a position much below the flame, when it would fall atthe foot of the lamp. Both resources, however, when applied, give rise to new and critical difficulties;the former requires that the supply of oil which flows downwards to the burner, should be accuratelyregulated. The most common and general application of this method is that adopted in the standinglamp, Fig. 24S2. The oil cistern A is a movable metallic vessel, capable of being closed at the bottomby a valve a, which moves between the regulating rods 6 b. In the upright position the val
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
