What is a pantograph and why does the MBTA Green Line use them?

A pantograph is the flexible, angled arm on the top of the trolley that connects the train to overhead power lines.

Shuttles replace Green Line service from Kenmore to Park after overhead wire problem, MBTA says - Boston News, Weather, Sports

MBTA Green Line Extension service replaced by shuttle buses Friday – NBC Boston

Boston: Subways, Wonderland, Trams and Mattapan

MBTA on X: When OCS issues occur, the pantographs on top of Green Line trains can be chipped or damaged. Following these events, we inspected all the trains involved & fixed any

Passengers walk along tracks after MBTA Green Line extension shuts down

Blue Line (MBTA) - Wikiwand

They didn't tell us anything': Sudden B Branch closure leaves riders fuming on the curb - The Boston Globe

Orange Line Mbta: Most Up-to-Date Encyclopedia, News & Reviews

What is a pantograph and why does the MBTA Green Line use them?

Power issue halts Green Line service day after track defects revealed - CBS Boston

Lego model I designed of the Green Line trains! : r/boston

Residents object to transfer of 'hand-me-down' Green Line trains to Mattapan line - The Bay State Banner

Trolley Slide - Boston T MBTA #3522 LRV Transit Train 1981 Special Pantograph

Another pantograph problem on the Green Line prompts delays, shuttle bus services

Boston Metro MBTA Green Line Type 9 modern fleet by CAF USA at Riverside terminal station, Newton, Massachusetts MA, USA Stock Photo - Alamy