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Hudson River Valley Heritage

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  • Subject: Inventions
(9 results)



Display: 20

    • Reviewing the Bruening blueprint machine

    • Photographs; Inventions; People
    • Presentation of the Bruening blueprint machine to Dutchess Community College. Somewhere in the photo is C.B. Schmidt, Vice Chairman of the Board of the DeLaval Separator Company. Second from the right is DCC President Dr. James F. Hall.
    • Cornelius Dubois Jr. Inventory, April 1816

    • African American children; African American girls; African American men; African American slaveholders; African American women; African Americans; coverlets; Huguenots; Inventories; Woven textiles;
    • Fourteen page inventory of Cornelius Dubois Jr. created April 1816. The inventory lists several household and agriculture items. Page twelve lists seventeen coverlets (spelled coverlits) for 65 dollars. Four enslaved Africans are listed on page...
    • Cable car grip

    • Inventions; Inventors;
    • The cable car grip was invented in Upper Nyack. Garret A. Polhemus received a patent in 1885; it was reissued in 1886. The man demonstrating its use may have been the inventor. The owner of the original photograph is Marion Polhemus Adams of...
    • William Henry Hand Oral History Interview

    • Families; Houses; Science; Celebrities;
    • Oral history interview with William H. Hand. He discusses his family's origins and the family home, and the extensive restoration work on it over the years. Hand also talks about his interest in science, and life in Nyack at the start of the 20th...
    • Air core high voltage electric transformer

    • Inventions;
    • During his senior year at Nyack High School, inventor William Henry Hand built this air core high voltage electric transformer and demonstrated it on the school stage. The voltage was estimated at 700,000. It was considered a new development. A few...

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