Abstract: A device and method for suspending or holding down an overhead contact wire used for supplying power to electrical railway vehicles and trolley buses at the crest or trough of a vertical curve where the contact wire has an abrupt change in line angle. The device smoothes out the abrupt angle into a curve; parabolic in form and of a radius that is smooth for trouble-free operation of current collectors while maintaining elastic suspension. Contact wire uplift continues while passing through the device so that there is an avoidance of hard spots which cause uneven and accelerated contact wire wear. The device can further be used at the crest and/or trough of a vertical curve to maintain contact wire alignment where a horizontal curve with curve pull is encountered concurrently.

Abstract: A device and method for suspending or holding down an overhead contact wire used for supplying power to electrical railway vehicles and trolley buses at the crest of a vertical curve where the contact wire has an abrupt change in line angle. The device smoothes out the abrupt angle into a curve, parabolic in form and of a radius that is smooth for trouble-free operation of current collectors while maintaining elastic suspension. Contact wire uplift continues while passing through the device so that there is an avoidance of hard spots which cause uneven and accelerated contact wire wear. The device can further be used at the crest of a vertical curve to maintain contact wire alignment where a horizontal curve with curve pull is encountered concurrently.

Abstract: Contact means (4) related to a vehicle are adapted to comprise an elongated arm (50), one end portion (50a) of which is rotatably attached to the underside (bottom) of the vehicle (1) and the other end portion (50b) of which is adapted to support said contact means (4). One or more sensors (151a, 151b) are disposed at the vehicle (1) and are intended to be able to sense the presence of and the orientation of a track or groove (51) and transfer sensed information to a power control circuit (100), which is adapted to comprise a control circuit (100b), which when sensing the existence of and a sensed orientation of a track or groove (51), within a covered and restricted area, is to be adapted to actuate means (7) adapted to a sidewise movement and/or a lowering (or raising) movement at the contact means (4).