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Expired
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Frederick John Burrell
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Casting Or Compression Moulding Of Plastics Or The Like
(AREA)
Shaping Of Tube Ends By Bending Or Straightening
(AREA)
Abstract
16,755. Burrell, F. J. July 15. Instantaneous generators.-To produce a minimum of internal capacity and a large proportion of heating-surface, the tubes are initially formed with internal projections A, which, on the tube being subjected to pressure in rolls, dies, or the like, cause the formation of the internal stellated space C. The number of arms to the space corresponds with the number of the projections A.
GB189716755D1897-07-151897-07-15Improvements in and relating to Steam Generators.
ExpiredGB189716755A
(en)