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Application filed by Webb John Thomas HfiledCriticalWebb John Thomas H
Priority to PT7935284ApriorityCriticalpatent/PT79352B/en
Publication of PT79352ApublicationCriticalpatent/PT79352A/en
Publication of PT79352BpublicationCriticalpatent/PT79352B/en
Winch comprises a rotatable bearing surface for a cable and the friction between the surfaces and a given cable material at a predetermined tension varies continuously or stepwise along a rotational axis. Pref. the coefft. of friction of the surface for a given cable material increases grdually or stepwise along the axis. The surface pref. comprises a high friction material, and more pref. the material is polyurethane, polypropylene, or PVC.
PT7935284A1984-10-121984-10-12Improvements in or relating to winches
PT79352B
(en)
Surface tensiometer and surface tension measuring method and concentration controlling device and method utilizing the surface tensiometer and surface tension measuring method