US 823115 A
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No. 823,115. PATENTED JUNE 12, i906.
B. A. GRAMM.
APPLICATION FILED DEG.8.190:3.
19i P140030.) Q/ 51 we x 1 You 69 GYJWW gmwvw A 33711 C H'ozucu I outlet-compartment; each of said compartments colnprisim an end piece and a series of concentric cylindrical shells one end of each of which is mounted. in one of said end pieces and the other end of each of which is mount-' ed in a partition which separates said compartments from each other; the outer shell of each compartment being imperforate and the other shells thereof being perforated; and said partition being formed with apertures extending entirely around its outer edge be- I 5 tween the walls of theputer and the next to outer shells.
BENJAMIN A; GRAMM.
Witnesses H. T. HERMANN, W. H. SCHILDER.