Assembly and alignment device, particularly for a timepiece resonator mechanism

A device for assembly and alignment on a first bridge or bar, forming a timepiece movement plate, arranged in a first plane, the device comprising:

• a second bridge or bar arranged in a second plane, the second bridge being intended to carry a moving component of a timepiece resonator mechanism, the second bridge including an axial portion and first and second side arms extending from either side of the axial portion from an end of the axial portion, and
• means for aligning the second bridge on the first bridge, the means for aligning including
• first and second bearing faces respectively provided on first and second oblong passages disposed in the first and second side arms of the second bridge, and a third bearing face provided on a third oblong passage disposed in the axial portion and extending in a direction parallel to the axial portion, the first, second, and third bearing faces being orthogonal to the second plane in three different directions, and
• first, second, and third movable adjustment pieces mechanically connected to the first bridge, the first, second, and third movable adjustment pieces each being configured to come into contact with the first, second, and third bearing faces to position the second bridge in a determined position on the first bridge, the movable adjustment pieces configured to define a plurality of positions of the second bridge on the first bridge, and
• wherein the first and second bearing faces are substantially perpendicular to each other, and the third bearing face forms an angle of 45° with each of the first and second bearing faces.