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Friedrich Gierke
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13,372. Glerke, F. June 23. Chimney tops.- In chimney pots of the type in which an open-ended additional vertical pipe is arranged so that that the smoke & c. is delivered centrally i n t o it from the main pipe, a cover d leaving an annular space g into which wind is directed by a curved serrated collar f is provided above the main pipe a. The bottom of the additional pipe c is curved so as to have an inclined mouth i divided by a plate l curving in opposite directions at the bottom. Openings o, formed by cutting the metal and pressing it inwards beneath the incision, are formed in the walls of the top, and vertical plates p are placed within the additional pipe to prevent downdraught from passing to the main pipe.