Acoustic radiating membrane for a musical watch
AssigneeMontres Breguet S.A.
InventorsPolychronis Nakis Karapatis, Younes Kadmiri, Davide Sarchi
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Abstract
The acoustic radiating membrane is provided to equip a musical watch or a striking watch. The dome-shaped membrane comprises an active central portion, a lateral wall and a peripheral edge portion for holding the membrane in a watch case. The central part is configured in a convex shape or a conical shape and with dimensions devised to amplify a first vibration mode of one or more notes within a frequency range of between 500 Hz and 3.5 kHz.
Claims16
An acoustic radiating membrane for a musical watch or a striking watch, the membrane comprising:
- an active central portion and an edge portion, the active central portion extending inward from the edge portion where the membrane is held in a watch case,
- wherein the central portion is configured in a convex shape to promote vibration of the membrane according to a first unipolar deformation mode, following activation of the membrane by one or more frequencies within a range between 500 Hz and 3.5 kHz,
- wherein the convex central portion is a spherical cap for the membrane of a generally circular shape,
- wherein the spherical cap is part of a sphere of a radius N times greater than a diameter of the central portion, and
- wherein the radius of the spherical cap is between 6 and 8 times greater than the diameter of the central portion.
An acoustic radiating membrane for a musical watch or a striking watch, the membrane comprising:
- an active central portion and an edge portion for holding the membrane in a watch case,
- wherein the central portion includes two concentric conical portions that are directly connected to one another, a first conical portion that is conical from a centre of the membrane to a peripheral edge of the first conical portion and is configured with a first opening angle in relation to a central axis of the membrane, and a second conical portion that is conical from the peripheral edge of the first conical portion to the edge portion of the membrane and is configured with a second opening angle that is different from the first opening angle,
- wherein the central portion is configured in a conical shape between the edge portion and the centre of the membrane to promote the vibration of the membrane according to a first unipolar deformation mode, following activation of the membrane by one or more frequencies within a range between 500 Hz and 3.5 kHz, and
- wherein the central portion is obtained by depositing a material M2 different from a material M1, in which the other parts of the membrane are manufactured.
An acoustic radiating membrane for a musical watch or a striking watch, the membrane comprising:
- an active central portion and an edge portion for holding the membrane in a watch case,
- wherein the central portion is configured in a conical shape between the edge portion and the centre of the membrane to promote the vibration of the membrane according to a first unipolar deformation mode, following activation of the membrane by one or more frequencies within a range between 500 Hz and 3.5 kHz, and
- wherein the central portion is obtained by depositing a material M2 different from a material M1, in which the other parts of the membrane are manufactured.
Dependencies are inferred from the claim text.