Dial for timepieces
AssigneeOmega SA
InventorsFrederic Jeanrenaud, Gregory Kissling
Life of this patent
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Abstract
A dial for a timepiece, preferably a watch, the dial being provided with a relief portion which is made as an assembly of pieces on different levels, juxtaposed on a base, such that the relief portion is formed by the upper surfaces of the pieces. A method for manufacturing the dial with several separate pieces, the upper surfaces of the pieces being subjected to a polishing step and/or possibly an enameling step. The pieces are then cut along a defined contour and then assembled edge-to-edge on a base, so as to create the relief portion.
Claims12
A method for manufacturing a dial for a timepiece, the dial comprising a relief portion, wherein the relief portion is made as an assembly of elementary pieces on different levels juxtaposed on a base, such that the relief portion is formed by upper surfaces of the elementary pieces, the method comprising:
- a) manufacturing semi-finished elementary pieces by machining,
- b) treating said upper surfaces of the elementary pieces after step a) to give the upper surfaces a defined aesthetic appearance,
- c) cutting said treated elementary pieces along a contour of defined geometry,
- d) assembling the elementary pieces obtained after step c), by juxtaposing the pieces on the base,
- wherein the relief portion extends over an entire surface of the dial,
- wherein the relief portion is defined by a flat, polygonal, central surface which is situated at a first level measured from a horizontal reference plane, and a plurality of inclined side surfaces, which extend from a level essentially equal to the first level to a second level outside the dial, the second level being lower than the first level, a number of inclined surfaces corresponding to a number of sides of the polygonal surface,
- wherein one of said elementary pieces is a parallelepiped whose upper surface forms the polygonal central surface, and which has a number of side faces corresponding to the number of sides of the polygonal surface,
- wherein the parallelepiped is mounted centrally on said base, and
- wherein each of the inclined surfaces is made by the assembly on said base of elementary pieces which are juxtaposed with the side faces of said parallelepiped.
A method for manufacturing a dial for a timepiece, the dial comprising a relief portion, wherein the relief portion is made as an assembly of elementary pieces on different levels juxtaposed on a base, such that the relief portion is formed by upper surfaces of the elementary pieces, the method comprising:
- a) manufacturing semi-finished elementary pieces by machining,
- b) treating said upper surfaces of the elementary pieces after step a) to give the upper surfaces a defined aesthetic appearance,
- c) cutting said treated elementary pieces along a contour of defined geometry,
- d) assembling the elementary pieces obtained after step c), by juxtaposing the pieces on the base,
- wherein the relief portion extends over an entire surface of the dial,
- wherein the relief portion is defined by a flat, polygonal, central surface which is situated at a first level measured from a horizontal reference plane, and a plurality of inclined side surfaces, which extend from a level essentially equal to the first level to a second level outside the dial, the second level being lower than the first level, a number of inclined surfaces corresponding to a number of sides of the polygonal surface,
- wherein the relief portion is formed by first and second elementary pieces of which:
- the first elementary piece is a parallelepiped whose upper surface forms the polygonal central surface, and which has a number of external side faces corresponding to the number of sides of the polygonal surface,
- the second elementary piece is a ring whose upper surface is formed by the plurality of inclined surfaces, and which has a number of inner side faces corresponding to the number of sides of the polygonal surface,
- wherein the parallelepiped is mounted centrally on said base, and
- wherein the inclined surfaces are made by the assembly on said base of the second elementary piece juxtaposed with the first elementary piece.
A method for manufacturing a dial for a timepiece, the dial comprising a relief portion, wherein the relief portion is made as an assembly of elementary pieces on different levels juxtaposed on a base, such that the relief portion is formed by upper surfaces of the elementary pieces, the method comprising:
- a) manufacturing semi-finished elementary pieces by machining,
- b) treating said upper surfaces of the elementary pieces after step a) to give the upper surfaces a defined aesthetic appearance,
- c) cutting said treated elementary pieces along a contour of defined geometry,
- d) assembling the elementary pieces obtained after step c), by juxtaposing the pieces on the base,
- wherein the relief portion extends over an entire surface of the dial,
- wherein the relief portion is defined by a flat, circular, central surface which is situated at a first level measured from a horizontal reference plane, and a conical surface, which extends from a level essentially equal to the first level to a second level outside the dial, the second level being lower than the first level,
- wherein the relief portion is formed by first and second elementary pieces of which:
- the first elementary piece is a cylinder whose upper surface forms the circular central surface,
- the second elementary piece is a ring whose upper surface is formed by said conical surface,
- wherein the cylinder is mounted centrally on said base, and
- wherein the conical surface is made by the assembly on said base of the second elementary piece juxtaposed with the first elementary piece.
Dependencies are inferred from the claim text.