Device for assembling and tightening the two pieces of a...

G - Physics – 02 – C

Patent

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G02C 1/08 (2006.01)

Patent

CA 2191206

The two pieces (1<u>a</u>, 1<u>b</u>) of the slit circle carrying the glass (9) of spectacles are assembled and tightened by means of a screw (2) which is screwed into the piece (1<u>a</u>). Said screw (2) carries a coil spring (5) housed in a cavity (3) of the piece (1<u>b</u>) and which bears, on the one hand, to the bottom (1<u>d</u>) of said cavity (3) and, on the other hand to the head (2<u>b</u>) of the screw. The screw is locked to the piece (1<u>a</u>) by means of a circlip (8) engaged into an annular groove (7) made in the screw (2) at the vicinity of its end. The thickness of the circlip (8) depends on the longitudinal position of the screw (2) with respect to the piece (1<u>a</u>) of the glass-carrier circle once the desired tension of the spring (5) has been reached.

Les deux brins (1a et 1b) du cercle, fendu, portant le verre (9) des lunettes sont assemblés et serrés par une vis (2) se vissant dans le brin (1a). Cette vis (2) porte un ressort à boudin (5) logé dans une creusure (3) du brin (1b) et qui prend appui d'une part sur le fond (1d) de cette creusure (3) et d'autre part sur la tête (2b) de la vis (2). Cette dernière est verrouillée sur le brin (1a) par un circlip (8) engagé dans une gorge annulaire (7) que présente la vis (2) au voisinage de son extrémité. L'épaisseur du circlip (8) dépend de la position longitudinale de la vis (2) par rapport au brin (1a) du cercle porte-verre une fois atteinte la tension désirée du ressort (5).

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