Glasgow centre door problems solved
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• Several of the 140 Leyland Atlanteans in Glasgow Corporation's fleet which are fitted with separate entrance and exit doors have been operating for some months with the centre exit out of action. But a spokesman told CM this week that a solution to the problem has now been found and all the exitdoors are to be put back in service.
The design of centre exit door — which first appeared at the Earls Court Show in 1970 features a treadle mat which controls the length of time the door stays open. The door only opens if a passenger presses the bell when the vehicle has stopped. If the treadle mat is depressed the door remains open for 14 seconds. Owing to ingress of water the microswitch in the mat has given trouble. The manufacturers claim a life of 10 million cycles but tests in Glasgow's own laboratory have shown that 2 million is a more typical figure. About half of the 140 vehicles have now been fitted with a modified system using a heavy duty micro-switch normally used in the rear engine bonnet warning device. At the same time the switch has been housed in an easily accessible housing. Previously it took several men half a day to change the treadle mat. Glasgow is also trying six photo electric cell devices for governing door mechanisms.