Abstract: Resilient hinge for spectacles to connect the legs (14) and frame (11) in a pair of spectacles, the hinge including a stationary part (27) associated with the frame (11) and a movable part (29) associated with the leg (14), the movable part (29) comprising a cam element (13) containing terminally a vertical transverse through hole (25a), the stationary part (27) comprising a containing body (15) defining a first internal longitudinal seating (16), with which there cooperates a movable slider (19) containing in a coordinated position a hole (25b) cooperating with a pivot (12) associated with the transverse vertical hole (25a) of the cam element (13), the movable slider (19) including at an intermediate position a second stirrup-shaped seating (20), in which is fitted coaxially a hollow cylindrical element (21) closed at one end and having that end (23) facing towards the exterior, the hollow cylindrical element (21) containing resilient contrast means (24) cooperating with the wall of the second stirrup-shaped

Abstract: Miniature engine operated by an expanding gaseous fluid, which comprises a cylinder (18), piston (20) and inlet valve (29), the upper part of the piston (20) cooperating with a radially expansible resilient diaphragm (28), which is secured to the piston (20) and performs momentarily a pneumatic seal-engagement function along the periphery of said cylinder (18) during the gaseous expansion phase.

Abstract: Small-sized engine operated by an expanding gaseous fluid, which comprises a cylinder (18), a piston (20) and an inlet valve (38), the upper parts of the cylinder (18) and the piston (20) cooperating momentarily with a perforated (29) resilient membrane (28) circumferentially secured to the cylinder (18) and performing the functions of a pneumatic seal temporarily.