Suspension apparatus and method for contact wire at the trough and crest of a track vertical curve

A suspension method for attaching a contact wire to a support surface for overhead contact wires subjected to abrupt contact wire angle changes at the trough and crest of a vertical curve for tangent suspension to a suspension wire, comprising:

• providing a curve rail bar made of flexible spring material curvable to match the curve of said vertical curve;
• providing a plurality of clamp ears for attaching said curve rail bar to said contact wire which curve rail bar is supported at said trough and crest of said vertical curve;
• attaching said clamp ears to said curve rail bar and to said contact wire;
• supporting said curve rail bar at said trough and crest of said vertical curve;
• providing first and second attachment members;
• attaching said attachment members to a selected different one of said clamp ears;
• providing first and second elastic arms, each having first and second ends;
• attaching said first ends of said elastic arms to said first and second attachment members, respectively, and said second ends of said elastic arms to said support surface;
• forming said curve rail bar being in a curve of a varying radius smoothing out said abrupt angle change in said contact wire;
• and
• conforming said curve rail bar to curves of different degree by bending in a smooth curve from said attachment members and supporting said contact wire in said same smooth curve;
• wherein said curve rail bar is circular in cross-section and said clamp ears are disposed slideably on said curve rail bar for adjusting to a desired position, each clamp ear further including a set stud for fixing the clamp ear in place on said curve rail bar.