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Manhole covers - history, early designs and
examples (2) (Click on thumbnails to enlarge image) |
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Manhole covers - history, early designs and
examples (2) (Click on thumbnails to enlarge image) |
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Patents and early designs (cont.)
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Patent for manhole cover, 1894. The manhole cover has a recessed section that is filled with paving material. Patented by Thomas P. Greger on August 28, 1894. U.S. Patent No. 525,101. Sheet 2 of 2. See full text description. (Use back button to return to graphics section.) Source: United States Patent and Trademark Office at http://www.uspto.gov. |
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Patent for manhole cover, 1895. A revision to an earlier design (see above), this manhole cover has a recessed section that is filled with asphalt or other paving material. Patented by Thomas P. Greger on April 2, 1895. U.S. Patent No. 536,621. Sheet 1 of 2. See full text description. (Use back button to return to graphics section.) Source: United States Patent and Trademark Office at http://www.uspto.gov. |
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Patent for manhole cover, 1895. A revision to an earlier design (see above), this manhole cover has a recessed section that is filled with asphalt or other paving material. Patented by Thomas P. Greger on April 2, 1895. U.S. Patent No. 536,621. Sheet 2 of 2. See full text description. (Use back button to return to graphics section.) Source: United States Patent and Trademark Office at http://www.uspto.gov. |
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A cast-iron head and dust pan, used to prevent dirt and grit from entering the sewer system at a manhole. Circa 1899. Cady Staley and Geo. S. Pierson, The Separate System of Sewerage, Its Theory and Construction, Third Edition (New York: D. Van Nostrand, Co., 1899), p. 181. |
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Design for frames and covers, Syracuse and Brooklyn, New
York, circa 1914. The earliest known foundry catalog is from the early
1860s.
Source: Leonard Metcalf and Harrison P. Eddy, American Sewerage Practice, Vol. 1: Design of Sewers, 1st edition (New York: McGraw-Hill, 1914), p. 558. |
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Design for manhole cover locking device, Boston, Massachusetts,
circa 1914.
Source: Leonard Metcalf and Harrison P. Eddy, American Sewerage Practice, Vol. 1: Design of Sewers, 1st edition (New York: McGraw-Hill, 1914), p. 559. |
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Design for standard manhole head (early name for cover)
and cover, Philadelphia, Pennsylvania, circa 1914.
Source: Leonard Metcalf and Harrison P. Eddy, American Sewerage Practice, Vol. 1: Design of Sewers, 1st edition (New York: McGraw-Hill, 1914), p. 557. |
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Design details for manhole, lampholes, and manhole covers, circa 1916. Source: A. Prescott Folwell, Sewerage - The Designing, Construction, and Maintenance of Sewerage Systems, 7th edition (New York: John Wiley and Sons, 1916), p. 159. |
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Manhole cover designs by Aylward Sons Company, the predecessor
to Neenah Foundry Company, 1920.
Source: Aylward Sanitary Iron Catch Basins, Catch Basin Inlets, Manhole and Lamphole Covers, Track Drains, Crossing Plates, Lighting Standards, Special Castings from Drawings (Neenah, Wisc.: Aylward Sons Company, 1920), p. 21. |
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Manhole cover designs by Aylward Sons Company, the predecessor to Neenah Foundry Company, 1920. Source: Aylward Sanitary Iron Catch Basins, Catch Basin Inlets, Manhole and Lamphole Covers, Track Drains, Crossing Plates, Lighting Standards, Special Castings from Drawings (Neenah, Wisc.: Aylward Sons Company, 1920), p. 22. |
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Manhole cover designs by Aylward Sons Company, the predecessor to Neenah Foundry Company, 1920. Source: Aylward Sanitary Iron Catch Basins, Catch Basin Inlets, Manhole and Lamphole Covers, Track Drains, Crossing Plates, Lighting Standards, Special Castings from Drawings (Neenah, Wisc.: Aylward Sons Company, 1920), cover, p. 23. |
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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. 7. |
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