The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose; (1902)
Barber, Thomas Walter. [from old catalog] · New York, Spon & Chamberlain · leaf 249
door ; hinged, with inside plate to protect the door fromthe heat. 1934. Manhole door with water seal, or packed recess to keepback gases, smell, &c. 1935. Screwed plug handhole. 1936. Wrought-iron boiler manhole cover, and block, a specialmanufacture. 1937. Type of sliding door; can be made… … 1928. ^^^^i ^ r^^^^r?^^.^^ W^^ 1929. ^^^^^^■A^^^^kp^^^^^p^^ ^
Mechanical movements
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