Patent ID: 6439552
Filing Date: 2002-08-27
Classification: B60M,H02G

Abstract:
A tensioning device for applying a prescribed tension to overhead wire, comprising:a tubular outer casing having a first end connected to a fixed part; a spring mechanism received in said tubular outer casing and having one end fixed to a second end of said outer casing inside said outer casing; a tension rod having one end connected to the overhead wire, and another end received inside said outer casing and pivotally supported by the other end of the spring mechanism so as to accommodate a variable tension of the overhead wire, said one end of said tension rod extending out of an opening which is formed at said second end of said outer casing; said outer casing being substantially enclosed except for said opening, and a swaying movement of said overhead wire being accommodated by a pivoting movement of said tension rod to an extent permitted by said opening; and wherein said first end connected to said fixed part is located at a first axial end of the tubular outer casing and said second end of the outer casing in which said opening is formed is located at a second axial end of the tubular outer casing.