Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1977-08-15
1979-07-31
Taylor, Billy S.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242155BW, B21F 1700, B65H 7700, B65H 8108
Patent
active
041627717
ABSTRACT:
Apparatus for applying tension to a wire rod while wrapping the rod on a pipe for prestressing the pipe. The tension device includes a frame movable lengthwise of the pipe, the frame having a shaft parallel to the pipe on which is rotatably mounted a bull wheel around which a single turn of the wire rod is wrapped. A hydraulic pump is supported on a torque frame which in turn is rotatably supported on the shaft. The pump is driven in response to rotation of the bull wheel. A load-sensing element is mounted on the frame and engages the torque frame at a radial distance from the axis of the shaft that is substantially equal to the radius of the bull wheel. The hydraulic load on the pump controls the torque load on the bull wheel and hence the tension in the rod as it is withdrawn tangentially from the bull wheel. The reaction torque on the torque frame is measured by the load sensing element, the sensing element thus giving a direct measure of rod tension.
REFERENCES:
patent: 2749054 (1956-06-01), Crom, Jr.
patent: 3221401 (1965-12-01), Scott et al.
patent: 3338527 (1967-08-01), Chidzey
patent: 3770219 (1973-11-01), Hickman
patent: 4059238 (1977-11-01), Vogt
Ameron Inc.
Taylor Billy S.
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