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US 5,050,302 AGranted
Tool for slitting the exterior layer of cylindrical objects
AssigneeSiecor Corporation
InventorGregory A. Mills
Life of this patent
Estimating the term…
Abstract
Disclosed is a tool for making precise radial slits in the exterior of a cylindrical object, such as a coated optical waveguide filament. The tool has an interior passage and two blades to make radial slits. The blades are kept from penetrating too far into the interior passage by shims having a calculated thickness dependent on the angle separating the blades and the size of the interior of the object which is to be left uncut.
Claims9
A tool for slitting an exterior layer of a cylindrical object, comprising:
- (a) a frame having a cylindrical passage therein having a longitudinal axis and a cylindrical passage radius CR, and two radially extending blade slots in communication with said cylindrical passage, said blade slots separated by an angle .phi. whose vertex is on said longitudinal axis with respect to a plane perpendicular to said longitudinal axis;
- (b) a blade slideably received in each blade slot;
- and,
- (c) a shim on said frame limiting penetration of a blade into its blade slot.
1 more element
A tool for slitting an exterior layer of a cylindrical object, comprising:
- (a) a frame having a cylindrical passage therein having a longitudinal axis and a cylindrical passage radius CR, and two radially extending blade slots in communication with said cylindrical passage, said blade slots separated by an angle .phi. whose vertex is on said longitudinal axis with respect to a plane perpendicular to said longitudinal axis;
- (b) a blade slideably received in each blade slot;
- and,
- (c) a shim on said frame limiting penetration of a blade into its blade slot, said shim having a thickness within one percent of the value R Sin .theta.-[FR.sup.2 -(R cos .theta.).sup.2 ].sup.1/2, where R=CR-BR, BR is the radius of the cylindrical object, FR is the radius of the interior portion of the cylindrical object which is not to be slit by the blades, and .theta.=90.degree.-.phi./2.
1 more element
Dependencies are inferred from the claim text.