Jeweler's tool

Abstract

A cutting tool is provided with a plurality of circular cutting blades of varying predetermined thicknesses to shear sections from rings made of precious metals. Each blade is formed with a notched perimeter to provide a pair of blade cutting edges. The blades are mounted on a spindle for rotation therewith, while the spindle is rotatably mounted in a plurality of cutting blocks which are affixed to a base in an alternating arrangement with the aforesaid blades. The cutting blocks define cutting edges so that rotation of the spindle causes the blade cutting edges formed by the notched perimeter to come into a simultaneous shearing relation with the cutting edges of the two adjacent cutting blocks. Further rotation of the spindle will shear out a section of a ring interposed in the notched perimeter of the blade. The tool is further provided with removable trays to catch sheared pieces of precious metals. Rotation of the spindle is accomplished through a conventional crank handle.

Description

Claims

1. A cutting tool comprising:

a base member;

two substantially identically formed cutting blocks each defining at least one block cutting edge, said cutting blocks affixed to said base with said cutting edges in a parallel facing arrangement;

a spindle;

a cutting blade of predetermined thickness, said cutting blade defining a pair of blade cutting edges;

said cutting blocks defining a bore therethrough to rotatingly receive said spindle, and said cutting blade mounted on said spindle intermediate of said cutting blocks said cutting blade rotatable with said spindle to bring said pair of blade cutting edges into a simultaneous shearing relation with said cutting edges of said cutting blocks;

means for rotating said spindle.

2. The cutting tool of claim 1 wherein the cutting blade has a generally circular cross section and defines a square aperture transpiercing said blade and further wherein the cutting blade defines a notched perimeter, said notched perimeter forming the blade cutting edges.

3. The cutting tool of claim 2 wherein each of the cutting blocks includes a base portion having generally the shape of a rectangular parallelepiped and an upper portion unitarily formed with said base portion and upstanding from the upper one surface thereof generally at the midportion of said base portion, the axis of the bore positioned in said upper portion of predetermined distance above the plan passing through said one upper surface of said base portion.

4. The cutting tool of claim 3 wherein said spindle means comprises an elongated center portion having a square cross section and formed to fit the square aperture of the cutting blade, a threaded end portion, and a handle mounting portion at the end opposite the threaded end portion, the handle mounting portion adapted to receive the means for rotating the spindle means.

5. The cutting tool of claim 4 wherein the means for rotating spindle means comprises a handle and key means, said handle retained on said spindle by said key means.

6. The cutting tool of claim 5 further comprising receptacles abutting said cutting blocks.

7. The cutting tool of claim 1 in combination with a second cutting blade of a different predetermined thickness and defining a pair of cutting edges; and an additional cutting block defining at least one cutting edge, said second cutting blade mounted on the spindle intermediate of said additional cutting block and one of the two cutting blocks, said second cutting blade rotatable with said spindle to bring the cutting edges of the second cutting blade into simultaneous arrangement with the cutting edges of the one of the two cutting blocks, and the additional cutting block.

8. The cutting tool of claim 2 wherein the cutting blade defines a second notch in the perimeter thereof, said second notch defining a second pair of blade cutting edges.

9. The cutting tool of claim 1 further comprising bearing means positionable in the cutting blocks and acting in combination therewith to facilitate rotation of the spindle.

10. The cutting tool of claim 9 further comprising nut means received on the threaded portion of the spindle for retaining said spindle in rotation alignment with the cutting blocks.