US 4,380,111 AGranted

Cutting, stripping and wrapping bit

AssigneeCooper Industries, Inc.

InventorsClifford L. Galloup, Roger M. Bula, Robert W. Klemm, Ralph E. Westerburg, Jr.

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Abstract

A combination bit for cutting and stripping insulation from a solid flexible conductor wire and wrapping a stripped end portion of the wire on a terminal in a series of helical convolutions includes a cooperable sleeve having a wall portion forming a guide surface for permitting insertion of the wire into a groove formed on the periphery of the bit. A cutting blade disposed in the groove includes opposed straight cutting edge portions one of which is proportioned such that it engages the insulation of the conductor wire initially in a position which places said edge parallel to a cooperative flat surface portion on said sleeve and tangent to the circumference of the wire insulation. The bit and sleeve are proportioned so as to provide for initial engagement of the insulation by the conductor wire within approximately five degrees of angular rotation of the bit from its starting point.

Claims14

Dependent claims

In a device for stripping insulation from a flexible conductor wire and wrapping said wire on a terminal in a series of helical convolutions:

a rotatable wrapping bit having an elongated cylindrical body and including groove means forming a longitudinal conductor wire receiving groove disposed along the periphery of said bit and radially displaced from the axis of rotation from said bit;
an elongated cylindrical tubular sleeve, said sleeve including guide surface means forming a guide surface extending generally axially from one end of said sleeve and positioned to be in alignment with said groove means in a starting position of said bit with respect to said sleeve to provide for inserting an insulated conductor wire into said groove means;
said guide surface having a substantially flat surface portion, and,
insulation cutting means interposed in said groove means, said insulation cutting means including a first substantially straight cutting edge portion, oriented relative to said guide surface means such that, at the point of contact of said cutting edge portion with the flexible conductor insulation, said cutting edge portion is essentially parallel to said substantially flat surface portion of said guide surface means for forcibly engaging said insulated conductor wire between said first cutting edge portion and said substantially flat surface portion upon initial rotation of said bit to commence cutting said insulation.

1 more element

In a device for stripping insulation from a flexible conductor wire and wrapping said wire on a terminal in a series of helical convolutions:

a rotatable wrapping bit having an elongated cylindrical body and including groove means forming a longitudinal conductor wire receiving groove disposed along the periphery of said bit and radially displaced from the axis of rotation from said bit;
an elongated cylindrical tubular sleeve, said sleeve including a radially outwardly displaced tubular wall portion forming a guide surface extending generally axially from one end of said sleeve and positioned to be in substantial alignment with said groove means in a starting position of said bit with respect to said sleeve to provide for inserting an insulated conductor wire into said groove means, said wall portion being characterized by a curved inner surface of said sleeve contiguous with a substantially flat surface portion between said curved inner surface and a generally cylindrical inner wall of said sleeve;
and
an insulation cutting blade interposed in said groove means, said insulation cutting blade including a first substantially straight cutting edge portion, oriented relative to said flat surface portion of said sleeve such that, at the point of contact of said cutting edge portion with the flexible conductor insulation, said cutting edge portion is essentially parallel to said flat surface portion for forcibly engaging said insulated conductor wire between said first cutting edge portion and said flat surface portion upon initial rotation of said bit to commence cutting said insulation.

1 more element

Dependencies are inferred from the claim text.