Abstract: Provided herein is a flexible hinge comprising a tension spring (1), a sliding element (2), a sliding element guide (3), a spring tensioner (4), a stop (5) for stopping the longitudinal movement of the sliding element (2), a fastener (6), and a bearing shield (7). The flexible hinge disclosed herein can be installed in a pair of eyeglasses comprising a pair of temples and a frame front so as to connect the temples to the frame front. The flexible hinge can be fixed to the temple with the stop (5) at one end and to the frame front with the fastener (6) at another end. The fastener (6) is used to engage sliding element (2) with the bearing shield (7). The sliding element guide (3) enables longitudinal movement of the sliding element (2) along the x-axis and prevents its movement along other axes.

Abstract: Provided herein is a flexible hinge comprising a tension spring (1), a sliding element (2), a sliding element guide (3), a spring tensioner (4), a stop (5) for stopping the longitudinal movement of the sliding element (2), a fastener (6), and a bearing shield (7). The flexible hinge disclosed herein can be installed in a pair of eyeglasses comprising a pair of temples and a frame front so as to connect the temples to the frame front. The flexible hinge can be fixed to the temple with the stop (5) at one end and to the frame front with the fastener (6) at another end. The fastener (6) is used to engage sliding element (2) with the bearing shield (7). The sliding element guide (3) enables longitudinal movement of the sliding element (2) along the x-axis and prevents its movement along other axes.

Abstract: A resilient hinge device for connecting each of the arms to a front frame of spectacles in an articulated way, includes a tie bar having an axial extremity articulated with the arm and a resilient member including a substantially U-shaped sheet metal body, the resilient member being fitted onto the tie bar in such a way as to remain placed between the front frame and the arm to resiliently stress the arm towards preselected angular positions with respect to the front frame when the arm is rotated, these angular positions including a position in which the arm is open, suitable for wearing of the spectacles, and a closed position of the arm folded back against the front frame, and to return the arm to the open position when rotated beyond that position when opened too far with respect to the frame.

Abstract: A resilient hinge device for connecting each of the arms to a front frame of spectacles in an articulated way, includes a tie bar having an axial extremity articulated with the arm and a resilient member including a substantially U-shaped sheet metal body, the resilient member being fitted onto the tie bar in such a way as to remain placed between the front frame and the arm to resiliently stress the arm towards preselected angular positions with respect to the front frame when the arm is rotated, these angular positions including a position in which the arm is open, suitable for wearing of the spectacles, and a closed position of the arm folded back against the front frame, and to return the arm to the open position when rotated beyond that position when opened too far with respect to the frame.

Abstract: The most practical production of this innovation is shown in pictures 11 and 12. The connective element (1) is pushed into the housing (54) executed in the temple (5), and then in the housing (111) at the open end of the connective element (1) we mount the spring (2) that is not tensioned, and then the screw (15) that goes through the spring (2). Both the screw (15) and the spring (2) are sized in such a way that they can move axially in the housing (111) of the connective element (1). The screw (15) goes through the narrowed part (12) of the housing (111), and at the same time the spring cannot go through the narrowed part (12). The screw (15) is screwed into the temple (5) with screwdriver passing through the housing (111) and it compresses the spring (2) by its head until it reaches closing delimiter. The connective element (1) mounted into the temple (5) in mis way, is then placed in the housing (4) of the frontal ending (6).

Abstract: A jack-knife including a blade and a handle, inside which there is a housing for the blade and with respect to which the blade is pivoted with one pivoting end. A safety device is disposed inside the handle, cooperates with the pivoting end of the blade and is able both to prevent an unwanted escape of the blade from the housing, and to clamp the blade when it is in a functioning position, that is, at least partly outside the handle.

Abstract: Disclosed is a recessed hinge to make a temple elastic with respect to a respective end piece of a frame of a pair of spectacles. The hinge includes at least a male hinging element pivoted to at least a corresponding female element. The male hinging element includes at least a tie-rod able to slide with respect to the temple, a bushing arranged inside the temple and axially associated with the tie-rod, and an elastic means loaded between the bushing and an abutment element attached to the tie-rod. The female element includes a seating made in the end piece by removing material. The male hinging element also includes a hook element, solid with the tie-rod, housed in the seating, which articulates on a pin arranged inside the seating.

Abstract: Disclosed is a recessed hinge to make a temple elastic with respect to a respective end piece of a frame of a pair of spectacles. The hinge includes at least a male hinging element pivoted to at least a corresponding female element. The male hinging element includes at least a tie-rod able to slide with respect to the temple, a bushing arranged inside the temple and axially associated with the tie-rod, and an elastic means loaded between the bushing and an abutment element attached to the tie-rod. The female element includes a seating made in the end piece by removing material. The male hinging element also includes a hook element, solid with the tie-rod, housed in the seating, which articulates on a pin arranged inside the seating.