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| Re: MP14; End of the Paris Door Buzzer sound? (1560696) | |||
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Re: MP14; End of the Paris Door Buzzer sound? |
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Posted by Stephen Bauman on Sun Nov 1 08:28:29 2020, in response to Re: MP14; End of the Paris Door Buzzer sound?, posted by New Flyer #857 on Sun Nov 1 07:18:39 2020. I'm not familiar with the technology, but I presume that for the train, once the doors are opened, the train is completely inhibited from speeding up and is fully committed to stopping then and there no matter what.Not on the Spragues. There was a visible hydraulic piston that pushed the doors shut. There was a latch that that locked the doors together. The piston was activated by the conductor pressing a button. The pistons retracted, when the conductor released the button. The conductor would press the button, when the train approached the station. The conductor would then release the button. Passengers wishing to exit/enter would open the latch and move the doors apart. The conductor would hit the buzzer and then press the button to activate the piston. The conductor would release the button, when the train cleared the station. Only the latch would hold the doors shut between stations. I verified this on the Spragues because it was possible to move the doors slightly apart without undoing the latch. There was no interlocking should somebody open the doors, while the train was in motion. The postwar cars used a similar lack of safety interlock. Opening the doors was powered, when the passenger moved the latch. I know there was no safety interlock on the RER. The warning sounded but the doors did not close. The train took off between DeGaulle/Etoile and Auber/Opera with the doors open. It was a scary few minutes. I got into a seat and held on for dear life. |
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