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Neale Thomson
James Maxwell
Walter Elliot Laidlaw
Alexander Hill
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Publication of GB190218638ApublicationCriticalpatent/GB190218638A/en
Underground Structures, Protecting, Testing And Restoring Foundations
(AREA)
Abstract
18,638. Thompson, N., and Maxwell, J., [trading as Clydesdale Iron Foundry Co.]. Aug. 25. Manhole doors and frames.-The frame, Fig. 5, is made with a recess b to receive and seal a corresponding flange d on the cover B, Fig. 6. The cover is secured by means of a slotted extension D, which engages with a crossbar E fixed in a pocket C, which is an extension of the frame.
GB190218638D1902-08-251902-08-25Improvements in the Means for Securing Detachable Doors, or Covers, of Sewer Manholes, or similar Openings, in Place.
ExpiredGB190218638A
(en)