Simplex Wire and Cable Company

Simplex Wire and Cable Company was a prominent American manufacturer of electrical and telecommunications cables, operating from the late 19th century through the mid-20th century. Founded in Portsmouth, New Hampshire, the company became a critical supplier for major infrastructure projects, including transatlantic communications and United States Navy systems. Its technological innovations in submarine cable and coaxial cable design supported the growth of global telecommunications and national defense.

History

The company was established in 1893, initially focusing on the production of insulated wires for burgeoning electrical markets. Under the guidance of early investors like Thomas J. Foster, it expanded its operations significantly during the early 20th century. A pivotal moment came with its involvement in laying critical transatlantic telegraph cables, competing with firms like Western Union and AT&T in the race for global communications dominance. During World War II, the company became a vital contractor for the United States Department of the Navy, manufacturing specialized cables for sonar, radar, and shipboard systems. This period of intense military production solidified its reputation and led to substantial growth, with facilities extending beyond its New England roots.

Products and innovations

Simplex was renowned for its pioneering work in submarine telegraph and telephone cables, developing durable, waterproof designs capable of withstanding deep-ocean pressures. The company advanced the technology of coaxial cable, which later became fundamental for broadband television and data transmission. Other significant product lines included power cables for industrial applications, mining cables, and sophisticated electromagnetic wiring for the United States Department of Defense. Its engineers contributed to improvements in polyethylene insulation and armored cable construction, setting industry standards that influenced competitors like General Cable Corporation and Anixter.

Corporate affairs

For much of its history, the company was headquartered in Portsmouth, New Hampshire, with major manufacturing plants in locations such as Cambridge and North Berwick, Maine. It operated as a significant, privately-held entity before undergoing several ownership changes in the post-war era. In 1970, the company was acquired by Tyco International, then known as Tyco Laboratories, which integrated its product lines and technologies. Prior to this, it had collaborated with and supplied components to giants of the Bell System, ITT, and the American Telephone and Telegraph Company.

Notable projects

The company's cables were integral to landmark projects that shaped the 20th century. It supplied cables for the first transatlantic telephone cable system, TAT-1, a joint project by AT&T, the British General Post Office, and the Canadian Overseas Telecommunications Corporation. During the Cold War, it produced cables for the SOSUS underwater listening network, a critical anti-submarine warfare program for the United States Navy. Its products were also used in major domestic infrastructure, including power grids for the Tennessee Valley Authority and communications lines for the Interstate Highway System.

Legacy

The technological legacy of Simplex Wire and Cable Company endures in modern submarine fiber-optic cable networks and advanced military communications systems. Its innovations in materials science and cable engineering provided a foundation for companies like SubCom and Alcatel Submarine Networks. The former Portsmouth, New Hampshire factory site has been redeveloped, but the company is remembered as a key player in the history of telecommunications and American industrial manufacturing during both world wars and the ensuing technological boom.

Category:Defunct manufacturing companies of the United States Category:Companies based in New Hampshire Category:Electrical cable manufacturers Category:1893 establishments in New Hampshire Category:1970 disestablishments in New Hampshire