Abstract: A spring hinge for eyewear with assembly locking elements that snap-in to place. The locking elements are in the form of a bent spring pin that is insertable in a compressed form and which, once inserted, expands to engage a stepped recess, locking it in place. The bent spring pin is formed from a single T-shaped blank allowing economical manufacturing and assembly, resulting in a secure, compact spring hinge.

Abstract: An eye glass frame temple is provided having a pole head portion, a leg portion rotatably coupled to the pole head portion, and a spring loaded pin for exerting a force against the leg portion when the leg is rotated a predetermined amount and in a predetermined first direction relative to the pole head portion. The force can cause the leg portion to rotate in a second direction opposite the first direction.

Abstract: Disclosed is a spectacle frame including rims which respectively surround lenses and are rested on a wearer's nose and temples which are fitted over and around the wearer's ears. The spectacle frame comprises a first spring disposed in each temple, each temple having an upper end and a lower end which is rotatably connected with the upper end, the upper end of each temple being defined with a first fastening groove in which one end of the first spring is fastened to the upper end, and the lower end of each temple being defined with a second fastening groove in which the other end of the first spring is fastened to the lower end, whereby the lower end of each temple can be rotated about an axis thereof.

Abstract: The present invention is about a guiding sheath with spacer for the hinge of eye-glasses, such that the sheath provides low frictional spacer to titanium alloy hinges. Sheath with spacer made from bronze or synthetic rubber with frictional coefficient less than that of titanium alloy can effectively lower the wear and tear at the hinge due to friction, enhance the smooth folding of the hinge, and thus extend the durability of the hinge. In addition to providing spacer, the present invention also provides positioning latch to the active core of the hinge and lateral support to the shaft during displacement, effectively enhances the stability of the shaft during displacement.

Abstract: An elastic hinge for eyeglasses, comprising a temple which has an end provided with a hollow body which accommodates, with a coupling which allows only rotation, part of a tubular element in which one end of a shaped element is guided with a coupling which allows only sliding. The shaped element has, at the other end, an eyelet which is inserted between two other eyelets which are fixed to the front of the eyeglasses so as to form the articulation of the hinge. A single spring is fixed with a first end to a part of the shaped element located inside the tubular element, with a second end to the hollow body and with a portion, which is intermediate between the first and second ends, to the tubular element.

Abstract: A spring hinge for eyeglasses comprising a spring member provided on the side of the temple; the spring member having a flexible press portion for flexibly pressing, from the inside of the armor, an arc periphery of the intermediate connecting member which arc periphery is formed by a center of the pivot shaft.

Abstract: A spring hinge for eyewear with assembly locking elements that snap-in to place. The locking elements are in the form of a bent spring pin that is insertable in a compressed form and which, once inserted, expands to engage a stepped recess, locking it in place. The bent spring pin is formed from a single T-shaped blank allowing economical manufacturing and assembly, resulting in a secure, compact spring hinge.

Abstract: Disclosed is a spectacle frame including rims which respectively surround lenses and are rested on a wearer's nose and temples which are fitted over and around the wearer's ears. The spectacle frame comprises a first spring disposed in each temple, each temple having an upper end and a lower end which is rotatably connected with the upper end, the upper end of each temple being defined with a first fastening groove in which one end of the first spring is fastened to the upper end, and the lower end of each temple being defined with a second fastening groove in which the other end of the first spring is fastened to the lower end, whereby the lower end of each temple can be rotated about an axis thereof.

Abstract: A replaceable spring arm structure for a spectacles includes an elongated spring arm which has a front end connected to a respective side extension of the spectacles and is detachably disposed in the slider cavity provided on a front end of a temple of the spectacles in a slidably movable manner, a locking member slidably mounted on the spring arm for locking with the locking through hole of the slider cavity so as to securely hold the spring arm in the slider cavity, and a resilient element which is mounted on the spring arm for applying an urging pressure against the spring arm, so as to normally retain the spring arm at an innermost position of the slider cavity. During folding and unfolding the spectacles, the spring arm is driven to slide outwardly along the slider cavity by a pulling force applied by the respective temple, so as to compress the resilient element.

Abstract: The invention relates to a spring hinge for spectacles, having a housing (3), a hinge part (5), which is arranged such that it can be displaced at least partially within the housing (3), a closure part (7), which is arranged in the housing (3), a spring (9), which is supported on the hinge part (5), on the one hand, and on the closure part (7), on the other hand, and having a stop device which has two stop elements. The invention is distinguished in that one stop element (33) is arranged on the hinge part (5), and the other stop element (63, 67) is arranged on the housing (3) or on the closure part (7), such that the capacity of the hinge part (5) for displacement counter to the spring force of the spring (9) is limited to a predetermined distance (w).

Abstract: An eyewear assembly that is capable of biasing a temple arm tightly against a rim frame so as to pinch a storage surface therebetween for storage purposes. The eyewear assembly includes the rim frame having at least one pivot axis through the rim frame. The temple arm includes a pivot axis through the temple arm, with the pivot axis being coaxially disposed with the pivot axis of the rim frame. A device for clasping the temple arm and rim frame together in both an open and closed position is mounted proximate the pivot axes. The rim frame engages the temple arm to bias the temple arm against the rim frame—thereby establishing a predetermined load on the rim frame in the closed position. The device for clasping further includes a clasping feature located on the rim frame and a clasping feature located on the temple arm, with one of the clasping means including a detent and the other clasping feature including a pawl that engages the detent.

Abstract: An ear-piece assembly for connecting an earpiece to a spectacle frame. The ear-piece assembly having a box with an opening in a hinging side wall. A tie-rod hinge having first and second hinge ends and a center portion located between the first and second hinge ends, the first hinge end having at least one wing and being located inside the box and the second hinge end being located outside the box, the tie-rod hinge is slidable through the opening in the hinging side wall. The ear-piece assembly also having at least one spring with first and second spring ends and being located inside the box, the at least one spring is not surrounding the tie-rod hinge, and the first spring end is in abutment with the hinging side wall of the box and the second spring end is in abutment with the at least one wing.

Abstract: An elastic hinge for eyeglasses comprising, at the end of a temple, an eyelet-shaped element suitable to engage, by means of an articulation pivot, two elements having the same structure and protruding from the front. Starting from the eyelet-shaped element, the following elements are assembled in sequence on the temple: a slider with a spoon-shaped end; an elastic element; and a contrast element which extends with a hollow structure so as to conceal the elastic element and at least partially conceal the slider. An annular locking element is at least partially interposed between annular abutment regions of the contrast element and of the temple, is inserted from the free end of the temple and can be deformed elastically with its locking parts so as to move beyond the abutment region of the temple.

Abstract: Disclosed is an eyeglasses frame comprising a front having two rims connected each other with a bridge and two temples foldably fixed to opposite sides of the front. Each of the temples is connected to one or the other side of the front with at least one coiled spring, which can be changed in diameter or twisted so that the associated temple may be opened wider than the normal opening position, and may be changed vertically in posture. A temple-less auxiliary eyeglasses can be used in combination with the eyeglasses. The temple-less auxiliary eyeglasses have L-shaped catch pieces formed on its opposite sides, which L-shaped catch pieces can be fitted in the coiled springs.

Abstract: A bi-elastic device for the elasticizing of ear-pieces for spectacles, comprising a small box that is combined with the ear-piece by spot-welding and pre-assembly. Inside the small box are housed at least two springs, each of the springs on one side having an end in abutment on the small box, and on the other side having the other end in abutment of an end of a tie-rod. The tie-rod is substantially "L" like and the springs are placed adjacent and parallel to the end of the tie-rod. The opposite end of the same tie-rod is external to the small box, and is hingeable to a corresponding small front face provided on a frame of the spectacles.

Abstract: Face conforming eyewear includes a rotation limiting hinged bridge and flexible temples with open barrel hinges to reduce the inflexibility of the eyewear frame. The preferred temples have a greater than 90.degree. movement, up to about 105.degree., with respect to the frame. The extra degrees of movement of the temples and the limited rotational movement of the hinged bridge, from about 4.degree. to about 12.degree., allows opposed sides of the frame and the temples to shift and to absorb pressure when contact has been made with the eyewear, especially when worn in active sports. The bridge can incorporate a single or double three barrel hinged.

Abstract: An eyeglass assembly is provided with a lens frame and a pair of earpieces each pivotally coupled to the lens frame by a hinge. A first hinge portion defines a first outwardly facing surface and an arm portion extending outwardly beyond the first outwardly facing surface. A second hinge portion is associated with the other of the lens frame and a respective earpiece, and includes an end portion defining a second outwardly facing surface. The end portion is coupled to the arm portion about a pivot axis extending through the arm portion and end portion. The first and second outwardly facing surfaces are contoured for frictionally and slidably engaging one another to permit pivoting of each earpiece relative to the lens frame within an arc of approximately 180.degree. about the pivot axis from a folded position to a spread position where the free ends of the earpieces are substantially facing away from one another.

Abstract: An elastic spectacle frame comprises, on one side, a male charnier consisting of one end of a rod (12) solid with the middle part of a transverse connecting hinge pin (14), and a bearing surface (26) facing at least each portion of the pin protruding from the rod. The pin and the bearing surface being normally biased towards one another in the longitudinal direction of the rod by an elastic biasing mechanism (20,30,32), but are selectively movable apart from one another against the action of the elastic biasing mechanism. On the other side, the hinge comprises a female charnier (42,52) having eyelets (45,55) whose periphery, against which the surface comes to bear, is in the form of a cam, wherein at least one of the eyelets has a radial passageway (46,56), and wherein the interstice (49,59) between the eyelets is at least as big as the rod (12).

Abstract: A temple hinge device for an eyeglasses includes a coupling slip member attached to each lens frames of the eyeglasses and having an eccentric slot, a joint member attached to each temple of the eyeglasses and having a hollow portion, a pair of slits, a pair of apertures and a shaft pin for fastening the coupling slip through the eccentric slot and apertures, and a spring support member with a spring for slidably inserting into the hollow portion of the joint member. The temple hinge device allows the temples of the eyeglasses to be easily and effectively folded and unfolded by the operation of the spring.

Abstract: An elastic temple for eyeglasses includes a temple body, a sleeve, a compression spring and a fixing member. The temple body has a front combine member to be pivotally combined with a lens frame, fitting through the sleeve and the compression spring and the fixing member. The compression spring is contained in a rear passageway of the sleeve, and the fixing member pushes the rear end of the spring and is fixed firmly on the temple body. The sleeve can be pushed by the spring and move between the front combine member and the fixing member so that the temple body may be swung outward and back to its original position, with a screw connecting the lens frame and the elastic temple functioning as a pivot.

Abstract: Eyeglasses having lenses, a lens frame, temples and hinges that connect the lens frame with the temples. The hinge parts are provided with elasticity or play. At the ends of the lens frame, hinge projections each having a deep hole and an elongated hole are established. At one end of each temple, a hinge thick part having two holes on the same axis is provided. A leaf spring is inserted in the deep hole, while a stem that runs through the elongated hole of the hinge projection and the two holes of the hinge thick part is provided so as to act on the leaf spring. The deep hole is the widest at its open end, and gets gradually narrower towards its deepest end. The leaf spring is preferably provided with a bendable part.

Abstract: The invention is to embed a stretching spring member 1a, a compression spring member 1b and a supporting member 2 having a large friction coefficient as a nose pad into spectacles, thereby to constitute a displacement prevention mechanism K for preventing displacement of the spectacles.

Abstract: A connecting device, particularly for mutually connecting components of eyeglasses such as temples and a front and/or a lens and a lens and/or an eyewire and an eyewire and/or a temple and a temple. The device is constituted by at least one element which is detachably associable, with an interlocking action, with at least one of the components, in contrast with at least one flexible element, and can be pivoted to the other component. The device is structurally simple, easy and straightforward to assemble, and at the same time allows to achieve, for example, the extrawide opening of the temple at a low cost and without seizing.

Abstract: An eyeglass construction includes a hinge joint and temple bars with spreadable jaws with apertures that receive frame hinge pins. A unique key-and-lock mechanism is provided for spreading the temple jaws and holding them apart while interchangeable temple bars are removed and installed. A separate key having a lobe-shaped shank with an elliptical profile corresponds to a similar aperture through a slot in each temple bar so that when the key is turned, the jaws at the end of the temple bar are spread apart and held in a retracted state. A simple internal leaf spring molded into the temple bar bears upon a cam surface of the eyeglass frame so that a positional biasing of the temple bar is achieved.

Abstract: The present invention relates to a resilient hinge for spectacle frames. The hinge includes an inner male or female knuckle fixed to the end of a frame lug extending in a direction and an arm substantially in the extension of the lug and abutting against the lug when the arm is in its normal open position. The inner side of the arm is connected to the knuckle by means of a rigid return device which can rotate freely about the knuckle and operating by bending. The pivot point of the return device about the swivel pin of the knuckle or the swivel pin of the knuckle itself is flowing and able to move between two extreme positions respectively corresponding to the normal open position and to an additional position in which the arm is moved beyond the normal open position.

Abstract: An earpiece for eyeglasses is characterized by an earpiece body (1) having an eyelet (2) at its end and a threaded section (6) on which is screwed a sleeve (10) containing an elastic mechanism (9) suitable for pushing a cursor (8) against the eyelet (2) so that the distance between the sleeve edge (10a) and the cursor body (8c) can be adjusted.

Abstract: An elastic device for an eyeglasses frame is contained in a center deep opening of a center deep opening formed in each of two ends of a frame and pivotaly connected to a front end of each of two temples so that the temples may be automatically adjusted in its tightness relative to the frame. Then the frame may be worn by users having faces of different size. Further the shape of the temples may be alterable according to the configuration of a frame.

Abstract: An eyeglasses temple device has a temple and a pivot connector. The temple has a recess hole, a groove, and an extended plate. The pivot connector has a connecting device, an extended rod, and a spring. The connecting device has a hollow plate, a hollow lobe disposed on a first end of the hollow plate, a slot formed in the hollow plate, and a hole formed on a second end of the hollow plate. The extended rod has a cap end and a threaded end. The extended rod passes through the hole. The cap end is inserted in the slot. The threaded end is inserted in the groove. The spring surrounds the extended rod and is inserted in the slot. The hollow plate is inserted in the recess hole. A frame has two lugs, a notch, and a through hole. The hollow lobe is inserted in the notch. A bolt passes through the through hole to fasten the frame and the connecting device together.

Abstract: Glasses with automatically extended temples comprises a pair of fronts which are interconnected by a bridge and a pair of temples which are connected to each of the fronts. The temple includes an elbow which is fixedly connected to each of the fronts. The elbow includes an upper hoop and a lower hoop serving as pivotal mounting rings for connecting a rear temple portion thereof. The temple further includes a rear temple portion which is provided with an U-shape connecting portion having an upper mounting leg and a lower mounting leg. Wherein each of the legs the connecting portion can be pivotally and suitably connected into those two upper and lower hoops respectively by inserting the upper and lower mounting legs into the upper and lower hoops. Once the glasses are withdrawn from the receiving box, the two rear temple portions will automatically extend for easy and convenient usage of the glasses.

Abstract: A spring hinge assembly, especially for a temple of a pair of glasses, provides high wearing comfort in glasses, and includes a tension bar, a spring, a joint, and first and second abutments. The tension bar engages the first abutment which in turn engages the spring, and with its tension bar head cooperates in such a manner with the second abutment fixed to the joint so that beyond a predetermined opening angle of the spring hinge, the tension bar moves the first abutment toward the joint under spring tension. Preferably, the movable first abutment and the spring are threaded onto the temple.

Abstract: A temple assembly pivotably mounts to a lens holding frame of spectacles. The temple assembly has a first temple portion having a pivot member for pivotably attaching to the lens holding frame and an abutment for engaging the lens holding frame to restrict outward pivoting of the first temple portion away from the lens holding frame. A second temple portion is provided having a first end portion with an ear engaging section and a temple shaft slidably engaging the first temple portion. The first temple portion includes a receiving tube for slidably receiving the temple shaft therein through a first end opening. The pivot member has a hinge shaft with a pivot lug pivotably attachable to the lens holding frame. The hinge shaft is slidably received in the receiving tube through a second end opening of the receiving tube.

Abstract: A power and control system for micro-electronics is described, as for lightweight, battery-powered electrochromic (EC) eyewear. Preferably such system includes a primary, lithium-type cell and a secondary, sealed lead acid-type cell in a hybrid, power-sharing configuration capable of supplying the low-energy, high-current (pulse) drain requirements of microelectronics, e.g. a switchable EC lens. A switch-mode power supply controller manages the power-sharing load on the hybrid battery system such that the secondary cell is charged by the primary cell. The system is capable of meeting short-term pulse drain requirements of switching EC lenses from clear to fully darkened at an acceptably fast rate and long-term operating life requirements of approximately 1500 cycles.

Abstract: The process for producing a spectacle side piece comprises a first phase wherein a sleeve open at both ends is secured to one of the ends of metal rods. The sleeve cooperates, in operation, with an elastic yielding mechanism. During a second phase, the sleeve is capped with a synthetic material intended to protect the sleeve against environmental agents, a chamber inside the synthetic material being formed in correspondence with one of the holes of the sleeve. Finally, an elastic yielding mechanism is inserted in the sleeve and made integral with the latter.

Abstract: A structure for rimless spectacles of the type fashioned from wire where the shafts are attached on either side to static hinge mounts, likewise in wire, each anchored by two parallel shanks with portions bent outward from the lenses and affording pairs of coils aligned with the points of anchorage; and where the bridge and nosepiece support is in one piece and exhibits an upturned-U profile with splayed members formed into a loop at bottom and redirected upwards, each terminating in a fork of which the pins are inserted obliquely through the relative lens and anchored in an interference fit; alternatively, each upwardly directed end can be bent sideways at 90.degree. to form an angled portion accommodated partly by a groove machined in the lens and terminating in a single pin, again inserted obliquely through the lens; and further where the lens presents a peripheral channel in which to seat elastically deformable ring.

Abstract: Disclosed is an improved frame structure for glasses using two counter joint pieces loosely coupled with a screw. One of these joint pieces is fixed to the rim projection, and the other joint piece is fixed to the temple, and these joint pieces are pulled toward each other under the resilient influence, which is caused by the spring plate of the joint piece on the temple side, thereby assuring the stable folding and unfolding of the temples on the front, still permitting each temple to move a short distance from the 90 degree-wide unfolding or linear-alignment with the rim projection like the "Spring Hinge".

Abstract: The frame for spectacles without surround comprises: a pair of arms (3); for each arm, an element (7) for connection to the respective lens (L); an intermediate bridge (5) for the connection of the two lenses (L); a pair of pads (31) for support on the nose; means for locking the bridge and the connecting elements to the respective lenses. Advantageously, the connecting elements (7) each exhibit a first bent end forming a helical spring (7A) intended to be inserted in a corresponding hole (LF) of the respective lens (L); the locking means comprise, for each lens, a screw (15) inserted coaxially in said spring.

Abstract: A coil spring is held in a compressed state between a forward end side of an elastic member compartment of a temple and a working face of a cover. A plate spring which is folded in two is held in a concave part of the cover so that a side closer to a base end portion of the temple is open, with one of two open forward ends of the plate spring engaged with a step on a bottom surface of the elastic member compartment for preventing the cover from being slid toward the base end portion of the temple and slipping off. An outer end surface on a base end portion side of the cover is in contact with a forward end surface of a rim in a normal use position. The cover is pushed by the forward end surface of the rim when the temple is further spread beyond the normal use position, to be slid toward the forward end along a guide member of the temple while compressing the coil spring against its spring force.

Abstract: The invention relates to a spring hinge for eyeglasses with a spring member and a housing at least partially receiving the hinge member and which is open at one end surface thereof, with a closing member (13) fixedly retained in the housing (3) and having a run-on surface (38), which closes the end surface of the housing, and with an opening having guide surfaces (19, 21, 23) and extending through the closing member (13) for receiving the hinge member (11).

Abstract: The present invention relates to a temple frame mounting structure in spectacles. A notch portion is provided in a part of an annular side of a lens frame, and a pair of clamped pieces are fixed at positions of the lens frame between which the notch portion is positioned, and have distal ends extending apart from the lens frame in a direction of eyes. The clamped pieces are guided to the groove-like clamp pedestal having a pair of bearing portions on both sides, and are clamped to the clamp pedestal by a cam piece horizontally movably and pivotally mounted to the bearing portions of the clamp pedestal, thereby pivotally mounting the temple frame to an end of the cam piece.

Abstract: A double piston spring hinge which is used for connecting temples to an eyeglass frame. The double piston spring hinge has a front structure, a rear structure, two piston cylinders symmetrically and parallel mounted between the front and rear structures, a flap lever, and a bracket for stabilizing the front and rear structures. The two temples are hinged to opposite sides of the front of the frame by the double piston spring hinges so as to permit the two temples to fold on the frame. Each piston cylinder contains therein a spring. A piston goes in and out of the cylinder and is biased by the spring. The piston is held within the cylinder at one end and in linking members at the other end. The double piston spring hinges are a flexibility system which is a bracket that is a spring actuated piston piece which lends flexibility to the temple.

Abstract: A temple mounting structure including a rim lug raised from one rim of an eyeglass frame having a vertical axle hole and a transverse guide slot in communication with the vertical axle hole, a circular swivel block turned in the vertical axle hole of the rim lug, a socket holding a compression spring, a temple having a shoulder stopped outside the socket and a coupling rod inserted through the socket and the compression spring into the transverse guide slot of the rim lug and fixed to the circular swivel block, and a stepped, tubular stop member mounted around the coupling rod of the temple and stopped between the rim lug and the compression spring and forced by the spring force of the compression spring to hold the temple between the operative position and the collapsed position.

Abstract: A spring-action temple for eyewear includes an L-shaped notch formed in the outwardly facing surface of the temple, the notch forming a finger portion having a tip portion. As a lateral force is applied to the back end of the temple, the temple flexes at a thinned wall section of the notch for a first distance of travel T.sub.1, with the tip portion moving toward the front end of the temple until the tip abuts the wall of the notch. The temple may flex even further outwardly by flexing at a location rearwardly of the notch for a second distance of travel T.sub.2. Upon removal of lateral forces, the temple automatically returns to its unbiased position.

Abstract: An eyeglasses temple includes an end connector, a position sleeve, a spring, a screw, a housing and a metal temple combined together. The end connector to be combined with a lens frame has a rear square portion fitting in a front cavity of the sleeve. The screw has a front threaded portion screwing with a threaded hole of the sleeve, with the spring located between the head of the screw and a rear end surface of the sleeve. Then the sleeve with the spring and the screw fits in a front cavity of the housing, which is combined with a front end portion of the metal temple by means of screws. Then the metal temple has elasticity to be pushed outward to conform with the face of a wearer.

Abstract: A spring-action temple having two main front and rear temple segments. The front temple segment attaches to the eyewear front at a front end thereof and forms includes a leaf spring at the rear end thereof. The rear temple segment includes an opening at the front end thereof which forms a channel which telescopingly receives the leaf spring of the front temple segment. The front and rear temple segments pivotally attach to each other at a point adjacent the opening of the channel such that the rear temple segment may pivot further outwardly, thereby biasing the leaf spring within the channel to accommodate a larger head size while providing a secure yet comfortable fit.

Abstract: A spring hinge for eyewear which enables the temples of eyeglasses to be opened beyond their regular position of use. The spring hinge having a one or two-piece locking element provided with a sliding element recess engageable with a sliding element and a snap-in pin recess engageable with a snap-in pin. A spring biases the snap-in pin into a stepped recess and thereby automatically locks the spring hinge.

Abstract: The present invention relates to a new kind of joint, in particular for securing side pieces of spectacles to the frame of spectacles, which is capable of conferring to the bows an appropriate elasticity, both when they are braced over the temples and when they are opened or closed, so that they are not limited by any problems of size. The characteristic feature of the joint is that it has a forked part or forked spring (11 or 111), the ends (112, 114) of which have inner surfaces provided with teeth (122, 123, 124, 125) or grooves (16, 17) with slanting walls shaped so that they stand at right angles to each other and are concentrically arranged around a transverse joint pin (19, 119) linked to a second part inserted between both fork ends (112, 114). Said part is fixed to the frame (18, 118) of the spectacles and allows both parts to rotate, pressing apart the ends (12, 14 or 112, 114) of the fork, achieving the desired elasticity when the parts are rotated.

Abstract: A spectacle frame includes two side extensions each having a channel for rotatably receiving two rotary members. A pair of legs are secured to the outer rotary members. A resilient ring is engaged around the rotary members so as to couple the rotary members together. The extensions each includes a curved slot for receiving a rod of an outer rotary member. When the rod is moved along the curved slot against the ring, the ring may relatively bias the outer rotary member and the legs backward to working position so as to form a resilient coupling.

Abstract: A spectacle frame includes two extensions extended from the side portions and each having a pivot shaft and a channel. A pair of legs each has one end engaged through the channels and secured to the pivot shaft so as to allow the legs to be rotated about the pivot shafts. The legs each has a slide slidably engaged on the end end and each has a spring for biasing the slides to engage with the extensions. The springs may be easily engaged on the legs. No holes or cavities are required to be formed in the legs such that the strength of the legs will not be decreased.

Abstract: A spring hinge including a hinge member with a spring member mounted on the hinge member, and a housing for receiving the hinge and spring members, and having an abutment against which the spring member is supported and which insures preloading of the spring member and its retaining, together with the hinge member, in the hinge housing.

Abstract: Hinge to connect the legs (14) and frame (12) of a pair of spectacles, in which the frame (11-12) comprises a connecting pivot (15) and a cam shaved element while the leg (14) comprises at least a resilient resisting cylinder (17-18) and seating (19), the resilient resisting cylinder (17) including at its forward end a surface with an inclined plane (20) together with a lateral extension forming an abutment tooth (21), the cam shaved element associated with the frame (11-12) including two surfaces (16a-16b) formed as inclined planes at an angle to each other and at an angle to the plane containing the lengthwise axis of sliding of the cylinder (17).