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  2. Pointing machine - Wikipedia

    en.wikipedia.org/wiki/Pointing_machine

    Workshop of the Strasbourg cathedral A computer controlled router carving a sculpture from a block of marble 15th Century measuring device with plumb-bobs. A pointing machine is a measuring tool used by stone sculptors and woodcarvers to accurately copy plaster, clay or wax sculpture models into wood or stone. In essence the device is a ...

  3. Marble Cliff Quarry Co. - Wikipedia

    en.wikipedia.org/wiki/Marble_Cliff_Quarry_Co.

    In 1985, the Kaufmans sold the 2,000-acre (8.1 km 2) quarry to investors who filled in and developed the quarry for residential use, including Marble Cliff Commons [6] [2] [3] apartments and Marble Cliff Crossing, a 100 single-family and 60 double-family subdivision built between 1998 and 2003. [7]

  4. Martin Frederick Christensen - Wikipedia

    en.wikipedia.org/wiki/Martin_Frederick_Christensen

    The machine is called an "apparatus for making small metallic spheres" in U.S. Patent No. 632336. [4] He quickly sold 80% of the patent for $25,000, and retained the last 20% to be able to collect royalty payments. [5] This machine, referred to as "The Christensen Ball Rolling Machine", proved unsuccessful due to many engineering and mechanical ...

  5. List of quarries in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_quarries_in_the...

    According to Marble.com, in 2016 there were 276 quarries producing natural stone in 34 states, and states producing the most granite were Texas, Massachusetts, Indiana, Wisconsin, and Georgia. [1] The term "quarry" refers also to sites producing aggregate, molding sand, or other resources besides cut stone.

  6. Marble Cliff, Ohio - Wikipedia

    en.wikipedia.org/wiki/Marble_Cliff,_Ohio

    Marble Cliff is a village in Franklin County, Ohio, United States. The population was 634 at the 2020 census . Marble Cliff was one of the first suburbs of Columbus, Ohio , settled as a community in 1890 and incorporated as the "Hamlet of Marble Cliff" in 1901.

  7. Engineered stone - Wikipedia

    en.wikipedia.org/wiki/Engineered_stone

    Breton S.P.A., a privately held company of Treviso, Italy, that developed the large-scale Breton method in 1960s, [1] is the dominant supplier of equipment for making engineered stone. [ citation needed ] Although Breton was the original manufacturer of moulding equipment and still holds multiple international patents on the process, there are ...

  8. Quarry Trails Metro Park - Wikipedia

    en.wikipedia.org/wiki/Quarry_Trails_Metro_Park

    The park still borders active portions of the Marble Cliff Quarry; other portions were sold for housing and mixed-use developments. Marble Cliff was formerly the largest quarry in the United States, the source for limestone used in the Ohio Statehouse and Ohio Stadium , and was the workplace for many Italian immigrants who settled in the ...

  9. Jeffrey Manufacturing Company - Wikipedia

    en.wikipedia.org/wiki/Jeffrey_Manufacturing_Company

    The Jeffrey Manufacturing Company, was an American industrial equipment manufacturing company, at one time the largest producer of coal cutting machines and mining locomotives in the world. It was established in 1878 as the Lechner Mining Machine Company, based in Columbus, Ohio , and is credited with producing America's first power-driven coal ...