ˈoverˌdraught, -ˌdraft
(-drɑːft, -æ-)
[over- 1.]
A draught passing over or admitted from above a fire, furnace, kiln, etc. attrib. in overdraft kiln, a form of brick- or tile-kiln in which the heated products of combustion are made to pass down through the contents of the kiln before escaping by the chimney flue or flues.
| 1884 Davis Manuf. Bricks, etc. vi. 278 The circular, domed ‘over-draft’ kilns are largely used for burning fire-bricks and terra-cotta products. Ibid. vii. 323 The principal gain in the circular overdraft kilns is, the impartial and equitable distribution of heat. |