Abstract Eyeglass frame of which the bows can assume two distinct positions with respect to the front under the effect of a loaded part which cooperates with two notches in one of the parts of the hinge, characterized in that the loaded part, which is located in an axial housing of the bow has the form of a shoe of which the one end is convex and cooperates in a known manner with the part of the hinge having the notches, while the opposite end comes to rest against a shoulder located in the corresponding housing of the bow in order to limit the folding out of the bow towards the outside. Part 3 of the hinge comprises two notches 10 and 11 separated by a cylindrical part 9. Bow 2 which is pivotably mounted with respect to face 1 is hollowed out by an axial bore 14 in which a shoe 17 is placed. If the bow is opened past its normal position, end 17b of the shoe comes to rest against the shoulder of bore 14. When the bow is released, spring 19 returns the bow to its use position by acting on 17.
An eyeglass frame comprising a face piece having opposite ends; a pair of side bows; hinge means respectively fixed to said opposite ends and to the ends of said side bows for connecting said side bows to the face piece tiltably between a folded position and an open use position; cooperating cam means on the hinge and spring-biased shoe means housed in each bow yieldably maintaining said side bows in either of said positions, said cam means comprising a camming surface having a pair of spaced recesses in which said spring-biased shoes respectively engagE when the respective shoe bows are in either of said positions, the end of each shoe adjacent the recesses being convex, and the opposite end cooperating with a stop on the bow limiting the outward movement of the shoe means away from the hinge means, the end of each bow adjacent the hinge means having a stepped cylindrical bore receiving said spring-biased shoe; each shoe being cylindrical and being axially slidable in the larger of said stepped bores; and compression springs interposed between said outer ends of said stepped bores and the said adjacent ends of said shoes.
Claim 2
Dependent Claim
192 words
An eyeglass frame comprising a face piece having opposite ends; a pair of side bows; hinge means respectively fixed to said opposite ends and to the ends of said side bows for connecting said side bows to the face piece tiltably between a folded position and an open use position; cooperating cam means on the hinge and spring-biased shoe means housed in each bow yieldably maintaining said side bows in either of said positions, said cam means comprising a camming surface having a pair of spaced recesses in which said spring-biased shoes respectively engagE when the respective shoe bows are in either of said positions, the end of each shoe adjacent the recesses being convex, and the opposite end cooperating with a stop on the bow limiting the outward movement of the shoe means away from the hinge means, the end of each bow adjacent the hinge means having a stepped cylindrical bore receiving said spring-biased shoe; each shoe being cylindrical and being axially slidable in the larger of said stepped bores; and compression springs interposed between said outer ends of said stepped bores and the said adjacent ends of said shoes.
Claim 3
Dependent Claim
60 words
In a frame as set forth in claim 1, the ends of the bows adjacent the hinge means each having an inclined face flush with a corresponding edge of the cam means at the position of maximum opening of the bows, said inclination presenting the same radius of curvature as the recess of the open use positions of the bows.