Suspension apparatus and method for contact wire at the trough and crest of a track vertical curve
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United States of America Patent
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Nov 1, 2016
Grant Date -
Sep 25, 2014
app pub date -
Jun 10, 2014
filing date -
May 15, 2012
priority date (Note) -
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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.
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