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Expired
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John Jones
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Individual
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Individual
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Publication of GB190516306ApublicationCriticalpatent/GB190516306A/en
16,306. Jones, J. Aug. 10. Man-holes.-The iron bottom a of a drainage man-hole or inspection chamber has flanges c extending into or under the brick or masonry walls d of the man-hole. The flange c has a turnedup flange e forming a key, and a flange may be provided at the face of the wall forming a stop to the cement facing thereof. The flange c may be provided with ruts or grooves to form extra keys.
GB190516306D1905-08-101905-08-10Improvements in and relating to Manholes or Inspection Chambers.
ExpiredGB190516306A
(en)