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Manhole covers - history, early designs and
examples (3) (Click on thumbnails to enlarge image) |
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Manhole covers - history, early designs and
examples (3) (Click on thumbnails to enlarge image) |
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Patents and early designs (cont.)
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Manhole cover designs by Neenah Foundry Co., 1934. Source: Municipal Castings, Neenah Foundry Co., Neenah, Wisconsin - Catalog "N" (Appleton, Wisc.: Badger Printing Co., 1934), p. 8. |
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Manhole cover designs by Neenah Foundry Co., 1934. Source: Municipal Castings, Neenah Foundry Co., Neenah, Wisconsin - Catalog "N" (Appleton, Wisc.: Badger Printing Co., 1934), p. 9. |
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Manhole cover designs by Neenah Foundry Co., 1934. Source: Municipal Castings, Neenah Foundry Co., Neenah, Wisconsin - Catalog "N" (Appleton, Wisc.: Badger Printing Co., 1934), p. 10. |
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Manhole cover designs by Neenah Foundry Co., 1934. Source: Municipal Castings, Neenah Foundry Co., Neenah, Wisconsin - Catalog "N" (Appleton, Wisc.: Badger Printing Co., 1934), p. 11. |
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Manhole cover designs by Neenah Foundry Co., 1934. Source: Municipal Castings, Neenah Foundry Co., Neenah, Wisconsin - Catalog "N" (Appleton, Wisc.: Badger Printing Co., 1934), p. 12. |
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Manhole cover designs by Neenah Foundry Co., 1934. Source: Municipal Castings, Neenah Foundry Co., Neenah, Wisconsin - Catalog "N" (Appleton, Wisc.: Badger Printing Co., 1934), p. 13. |
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A manhole cover turned into a missile and killed one person
after a subterranean explosion in Chicago in 1937.
Source: Chicago Tribune, May 30, 1937. |
| World War II - wooden manhole covers | |
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Wooden manhole cover in Los Angeles County, California, circa 1942. Colonel Carl H. Reeves, superintendent of the Los Angeles County, California, Maintenance Department, lifting a wooden manhole cover into place. Treated to resist termites and decay, each wooden cover saved 500 pounds of metal and could be manufactured without the use of extensive fabricating equipment. A War Production Board (WPB) order prohibited the use of iron and steel for manhole covers. Source: Library of Congress, Prints & Photographs Division, FSA-OWI Collection, reproduction number LC-USE6-D-007037 DLC (b&w film neg.). |
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Wooden manhole cover in Los Angeles County, California, circa 1942. Alfred Jones, county surveyor, points out the strength of the wooden manhole covers to Colonel Carl H. Reeves, superintendent of the Los Angeles County, California, Maintenance Department. Source: Library of Congress, Prints & Photographs Division, FSA-OWI Collection, reproduction number LC-USE6-D-007038 DLC (b&w film neg.). |
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Wooden manhole cover in Los Angeles County, California, circa 1942. Surveyor Alfred Jones explains to Beverly Hoyt the installation of wooden manhole covers in use in the county. Source: Library of Congress, Prints & Photographs Division, FSA-OWI Collection, reproduction number LC-USE6-D-007039 DLC (b&w film neg). |
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