coupling (Bergische Stahl Industrie, now Faiveley Transport) and the Schaku-Tomlinson Tightlock coupling. There are a number of other automatic train couplings similar to the Scharfenberg coupler, but not necessarily compatible with it. Older US transit operators continue to use these non-Janney electro-pneumatic coupler designs and have used them for decades. Westinghouse H2C The Westinghouse H2C coupler, whose predecessor the H2A was first used on the BMT Standards and later the R1 through R9 classes, is currently used on the R32, R42, R62, R62A, R68, and R68A class subway cars of the New York City Subway. The A ends of the cars typically have the Westinghouse coupler and the B ends use either a semi-permanent drawbar, or a Westinghouse coupler. WABCO N-Type The WABCO N-Type coupler was first developed for the prototype Pittsburgh Skybus system with the initial model N-1 as applied only to the three Skybus cars. The updated model N-2 with a larger gathering range was first applied to the new "Airporter" rapid transit cars on the Cleveland Rapid Transit line. The model N-2 used lightweight draft gear slung below the center sill, to allow for the wide swings required to go around sharp curves. This made the N-2 unsuitable for main line railroad use so an updated version N-2-A was developed for that market. The first of these were fitted in 1968 to the UAC TurboTrain with 228 electrical contacts and the Budd Metropolitan EMU with 138 contacts. Starting in the 1970s the N-2-A was fitted to the entire SEPTA Silverliner family of MU's, the NJT Arrow series of MU's and the Metro-North Railroad/Long Island Rail Road M series of MU railcars. The N-2 was also used by the PATCO Speedline, but was replaced due to issues with the electrical contacts. Later WABCO would create a new model N-3 for the BART system with a gathering range which required a rectangular funnel. The WABCO N-type is sometimes referred to as the pin and cup coupler or spear coupler. Tomlinson The Tomlinson coupler was developed by the Ohio Brass Company for mass transit applications, but eventually found use in some mainline railroad vehicles as well. It consists of two squared metal hooks that engage with each other in a larger rectangular frame with air line connections above and below. Since the coupler's development the manufacturing arm of Ohio Brass was purchased by WABCO which now manufacturers the line along