ADVERTISING SIGN FOR REVOLVING DRUM

摘要

A drum rotatable on a generally horizontal axis (for example, a ready-mix concrete drum) is provided with one or more signs pivoted to its periphery and carrying an off-center weight which tends to hold the sign upright so that the legend thereon will be readable in all positions of the drum. Preferably, the weight is a liquid partially filling a tube tangent to the pivotal axis upon which the sign is mounted and so disposed with reference to the sign that the liquid can flow toward the bottom of the sign to hold the sign upright.