Door latch arrangement

Details Door latch arrangement Door latch arrangement

E - Fixed Constructions

05

B

292/2, 292/5

E05B 65/10 (2006.01) E05F 15/06 (2006.01)

Patent

CA 1251240

- 12 - ABSTRACT Door latch arrangement A latch arrangement for emergency opening of, particularly, railway platform screen doors is described. These doors are power operated and are opened automatically, or under remote control, when a railway train has come to a halt at the platform with its doors in register with the screen doors. For emergency opening of the screen doors a handle is provided on the track side, thereby to be accessible to a train passenger, which will dis-engage the door latch members and de-energise the prime mover for opening and closing the doors, thus permitting the doors to be opened manually. In the particular embodiment the handle is connected to a vertically extending rod carried in the door which abuts, when the door is closed, a further rod in the door-headframe which dis-engages the latch members and releases pressure from a pneumatic door actuator, a spring loaded detent mechanism holds the headframe member in the deployed position, so that the prime mover is not re-energised.

478416

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