Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
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James Orr
Thomas Mcculloch
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Individual
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Individual
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Publication of GB190116665ApublicationCriticalpatent/GB190116665A/en
16,665. Orr, J., and McCulloch, T. Aug. 19. Ventilating-shaft tops.-Consists of a flared head K with a perforated top plate A and a separate cover H, between which there may also be one or more conical rings. The combination of perforated plate and cover may take a cylindrical form. The perforations may be fitted with short tubes, as shown in Fig. 11.
GB190116665D1901-08-191901-08-19Improvements in and relating to Up-draught Ventilating Cowls or the like.
ExpiredGB190116665A
(en)