Over the past week, a series of pantograph-related issues have forced the MBTA to halt service on part of the Green Line. A pantograph is the flexible, angled arm on the top of the trolley that ...

Single-arm pantographs are becoming increasingly preferred due to their aerodynamic efficiency, lightweight design, and lower ...

The explanation for the unusual device depicted on this 1942 ENR cover reads: “Developed by Harold Buckley, clearance ...