The Heintz Manufacturing Company was originally organized by Leo Heintz in Philadelphia in 1921. The firm initially manufactured all-steel pre-assembled truck bodies but later expanded to produce a wide range of pressed sheet-metal products. The records primarily focus on the company’s contractual obligations with the US Navy during World War II; employee retirement and pension plans; descriptions of various welding processes and tools, and material related to the licensing of cold welding under the trademark, "Koldweld."

The Missile and Surface Radar Division (MSRD) of the Radio Corporation of America operated as a primary government and military defense contractor from 1953 to 1986, developing and implementing advanced radar systems. The photographs in the collection depict instrumentation, radar equipment, control equipment, and research facilities at both the MSRD and the Navy AEGIS Combat System Engineering Deveopment Site in Moorestown, New Jersey.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The collection contains two membership certificates from the U.S. Naval Lyceum and the American Board of Commissioners for Foreign Missions.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The letter is writing to inform an unidentified captain of Naval surgeon John S. Wiley's death.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). These two items are related to his service in the Navy, one a letter concerning his business interests in California, and one report regarding rotten gun breechings.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The letter from du Pont to Charles Wilkes (1798-1877) expresses regret over news of Wilkes being court-martialed.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. The letter from du Pont to George H. Stuart (1816-1890) is declining an invitation to speak as a Navy representative at an anniversary celebration of the Christian Commission.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. The letter to Major General David Hunter (1802-1886) asks for permission to see three deserters from the Confederate States Navy.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The letter to Senator James A. Bayard (1799-1880) is upon arrival of the USS Minnesota, which was commanded by du Pont, in Hong Kong.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). These five photocopied letters are related to his term in the Navy, four from his time in the Pacific, and one dealing with the South Atlantic blockade during the Civil War.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. Andrew Hull Foote (1806-1863) was a Rear-Admiral in the United States Navy and fought in the Civil War and contributed to several naval reforms prior to the war. This collection consists of two letters, one from Samuel Francis du Pont to Foote in regards forwarding misdirected mail, as both were commanding ships in the China Sea. The second letter is from du Pont's father to a Naval Officer about Samuel Francis du Pont's experience aboard a ship.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). These three photocopy letters are related to his term in the Navy, one from his early career in 1820 and two letters from 1863 during the Civil War.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. The collection contains naval orders issued by du Pont to Naval orders to Acting Assistant Surgeon William H. Campbell (1832-1884) to report to Port Royal, South Carolina.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The collection is a microfilmed selection of du Pont's correspondence with contemporaries, primarily Alexander Dallas Bache (1806-1867). The letters concern Civil War activities, especially the use of ironclads in naval operations.

Samuel Francis du Pont (1803-1865) was a Rear Admiral in the United States Navy and fought in the Mexican-American War and the Civil War. He was the fourth child and second surviving son of Victor Marie du Pont (1767-1827) and his wife, Gabrielle Joséphine de la Fite de Pelleport (1770-1837). The collection is a microfilmed copy of excerpts from du Pont's journal as a midshipman aboard the Congress.

The records in Series IV of the Elmer Sperry papers were, for the most part, generated by the Sperry Gyroscope Company. They include Elmer Sperry's business and technical correspondence that describes the development and marketing of the company's aeronautical and marine instruments. Sperry's research files trace the history of the gyroscope beginning with its invention by Leon Foucault in 1854. His correspondence describes the state of gyroscopic technology and the patent situation as it existed in 1910.

Also contained in Series IV are some fragmentary administrative records. There is a copy of the minutes of the first Board of Directors meeting (June 2, 1910), reports to the stockholders (1917-1918), tax, and financial records.

After the war, the Sperry Gyroscope Company began a systematic effort to market its products abroad. The records documenting these sales initiatives contain correspondence with representatives of the English, French, Russian, and Japanese navies. Sperry's correspondence with Admiral Hideo Takedo, who represented the Japanese Navy as well as Mitsubishi Zōsen Kaisha Ltd., is of particular interest. These letters trace the process by which Mitsubishi became a licensee for Sperry products and Sperry Gyroscope gained access to the Japanese Navy. The Sperry-Takedo letters have both personal and business dimensions. The two men shared common interests and value systems based on a faith in technological progress and an appreciation of hard work. These correspondence files show that this friendship led Sperry to appreciate Japanese culture. He made several trips to Japan at the end of his life and in 1929 organized the World Engineering Conference in Tokyo.

William Branford Shubrick (1790-1874) was an officer in the U.S. Navy and served from 1806 to 1861, including service in the War of 1812, the Mexican-American War, and retired in the early months of the Civil War. The collection includes letters to Shubrick from Charles Henry Davis (1807-1877) and Samuel Francis du Pont (1803-1865) in appreciation of his naval services.