Concelman

Concelman is a surname that is most notably associated with the Bayonet Neill–Concelman family of RF coaxial connectors. The Bayonet Neill–Concelman (BNC) connector derives its name from Paul Neill and Carl Concelman, who designed the connector at Bell Labs in the mid-20th century. In technical literature, the name Concelman is encountered as part of the eponym that identifies the connector’s designers rather than as a standalone product line.

Historically, Carl Concelman is credited with the development of the bayonet-style coupling mechanism used in the BNC connector, which provided a quick-connect solution for coaxial cables while maintaining reliable electrical performance. The BNC family encompasses several variants and impedance configurations, most commonly 50 ohms and 75 ohms, and has been used across a wide range of applications.

In practice, BNC connectors have been widely employed in test equipment, radio frequency and microwave circuits, video systems, and networking gear. They became a familiar component in laboratory benches and field equipment from the 1950s onward, appreciated for their balance of ease of use and performance. Although newer connector types have supplanted some of their roles, BNC connectors remain a notable part of the historical and practical landscape of RF interconnections.

Today, the surname Concelman may appear in historical notes or old catalog entries referencing the inventor or the BNC connector. The term thus functions both as a family name and as a familiar eponym tied to a foundational RF connector.