W. W. PATTERSON COMPANY
July 11, 1985
MODEL M65-10-600I ELECTRIC ANCHOR WINCHES
These PATTERSON Electric Anchor Winches operate and are maintained in the same manner as our experience-
proven, anti-corrosion, enclosed-gearing I-Series mooring winches. Air, electric, and hydraulic powered versions have
been in service since 1969.
The Model M65-10-600I represents a major design advance over those previous models: All fasteners are stainless steel,
as are tie rods, spacer tubes, shafts, roller chain and sprockets, brake pawls and pawl springs, brake band components,
brake drum and internal brake ratchet gear. Essentially, stainless steel has been used for anti-corrosion purposes
wherever feasible. Remaining carbon steel components, such as the main frame plates and motor base plate, have
been sandblasted to SSPC "near white" and primed with inorganic zinc before applying epoxy and enamel finish coats.
A further distinction of these anchor winches is the addition of a "level-wind" assembly to ensure proper spooling of wire
rope. Of massive construction, this level-wind has been designed to withstand lateral forces that could result from strains
equal to the ultimate strength of the wire rope. Again, the guide bars, diamond shaft and vertical and horizontal rollers
are stainless steel, as are the roller chain drive and sprockets.
Central to the proper operation of the level-wind is the large, cylindrical butterfly pawl (LW-6) that rides in the grooves of
the diamond shaft (LW-5). Made of a high strength aluminum-bronze alloy, AMPCOLOY No. 45 (228 BHN, 75/118
KIPS), this pawl is readily accessible from the top of the level-wind for lubrication or inspection purposes.
Adjustment of the level-wind's tranverse position with respect to the wire rope drum is achieved by means of a 4-jaw
clutch on the rope drum shaft extension. Rotation of the disengaged male component (D-16) will result in the relative
displacement of spooled wire rope to level-wind. (To rotate the male half of the clutch, the electric motor can be jogged
or the pull-up ratchet can be used with both electrical and mechanical brakes released).
These anchor winches are designed for bottom spooling. That is, as viewed from in front of the level-wind, the reeling-in
action pulls the wire rope onto the underside of the rope drum. Starting at the left flange, the wire rope progresses to the
right, as does the level-wind.
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