The so-called British switch box for railways and track points

摘要

Switch box for railway, tramway, or similar comprising a drive unit (M, 3, 4, 5, 5', 5'', 5''', 6) for the shifting motion of the blades (A1, A1', A2, A2') and at least one group of linear transmission (12, 20, 21, 24) of the drive motion to the blades, movable device (24, 124) to lock the blades in their respective closed positions. The groups are housed in a box (1) which has substantially the dimensions and the shape of a sleeper and which is fitted in the track in place of and with the function of a sleeper. The switch box has movable device (23, 24, 124) to lock the blades (A1, A1', A2, A2') in their corresponding closed positions. The device (23, 24, 124) are associated with their respective blade (A1, A2) and arranged inside the box (1) in the area of the same and are brought automatically into active locking position when the corresponding blade (A1, A2') reached the closed position, while they are automatically disengaged on activation of the switch box to switch the blade into the position of closure of the blade (A2', A1) opposite.