Abstract: A low-profile catenary hanger, catenary wire system, and a method for supporting an electrical contact wire in relation to a messenger wire wherein a wire clamping assembly clamps about the contact wire, and a wire corral assembly is fixed to the clamping assembly. The corral assembly defines an adjustable reception corral through which the messenger wire is received without fastening so that the contact wire can rise without a consequent lifting of the messenger wire. The clamping assembly has a first clamping member with a keystone-shaped projection and a second clamping member with a keystone-shaped slot that can slidably receive the keystone-shaped projection to fix the clamping members together by operation of a setscrew. The clamping members together define a wire reception volume, and each clamping member has an engaging tooth whereby a contact wire with opposed longitudinal grooves can be clamped and retained by the clamping assembly.

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: 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: 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 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 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 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 or trough of a vertical curve to maintain contact wire alignment where a horizontal curve with curve pull is encountered concurrently.

Abstract: A device that allows standard non-load break disconnect switches to become full load break disconnect switches in that they can interrupt high levels of their rated current with no arcing or burning when the switch is opened under load in direct current use on electric railways, electric trolley bus systems, mine operations and motor controls.

Abstract: A section insulator for securing adjoining overhead contact wires for use by electric vehicles having a current collector, such section insulator including structural members to prevent destructive arcing caused by the passage of the current collector thereover. The structural members include first and second tension beams with replaceable arc shields mounted thereon, an adjustable center runner which can be lowered to compensate for wear, and arcing horns of a configuration to aid in the dissipation of electric arcs away from the structural members.

Abstract: A constant current wire crossing apparatus for overhead electrically operated vehicles, wherein wires of opposite polarity are connected by insulators to a crossing unit, including a conducting strip disposed on each insulator and appropriate switching circuitry such that a continuous source of power of correct polarity is available to a passing vehicle in any direction.

Abstract: A section insulator including a plurality of discrete runners with associated diodes preventing current from passing from a first circuit to a second circuit and vice versa of a power line having separate circuits to prevent arcing as an electric vehicle's current collector passes along the section insulator between the first and second circuits while the vehicle maintains a constant flow of electric current as it passes along the section insulator.