Abstract: A folding clasp for a wrist-watch, having at least one folding arm (1, 2) articulated with respect to a base plate (3) and a locking device (4) located on the base plate (3). The locking device (4) includes a mobile part (4.5) permitting a locking with an inclined end face (1.1, 2.1) of the at least one folding arm (1, 2) folded down on displacing the mobile part (4.5) in plane (TT') substantially perpendicular to the opening/closing plane (00') of the at least one folding arm (1, 2).

Abstract: The invention relates to a folding clasp having at least one folding arm (1, 2) articulated with respect to a base plate (3), with a locking means (4) located on the base plate (3), permitting a locking of said at least one folding arm (1, 2) by pressing said folding arm (1, 2) onto said locking means (4), said locking means (4) being compressible and/or deformable in a first plane (TT') parallel to a base surface of said locking means (4).

Abstract: A clasp fastener having a clasp (1) is designed to be snapped into engagement by exerting a closing force. A locking device (4) for locking the clasp (1) is placed by the closing force in an engaged position in which it is in a first snap engagement with a locking projection (6), and a closing member (5) for closing the clasp (1) is fixed by the closing force in a safety position in which it is in a second snap engagement with the locking device (4) so that the snapping force of the first engagement of the clasp (1) with the locking projection (6) is increased. At least one variable-diameter pin (17,18) that is flexible and/or has different diameters allows some movement of the locking device (4), so that the effective closing force exerted on the locking projection (6) is reduced.

Abstract: A connecting device for jewelry and accessory comprising a spring member made in manner that a metallic plate with an elasticity is bent to form a plate spring comprising a first plate spring section and a second plate spring section and a connecting device body including a base plate and a spring casing section placed on the base plate. The first plate spring section has one end equipped with a locking portion and a pushing handle, while the second plate spring section has one end equipped with a spring body side wall section rising to surround the pushing handle, the spring body side wall section having curved edges curved to lower so that both side surface portions thereof continuing with its central portion has one of an arc configuration and a tapered configuration. On the other hand, the spring casing section of the connecting device body has a hollow portion to accept the spring member and has one side wall curved to lower to form an arc or tapered configuration.

Abstract: A strand adjusting mechanism (5) in a folding clasp (1, 2) for bacelets, this mechanism comprising a buckle (40) mounted pivotally round a transverse rotational shaft (20) at the end of one of the blades (1) of the clasp and a tongue (30) mounted pivotally round the same shaft (20) as the buckle. The tongue and/or the end of the blade have one or more stops (16, 34) limiting the rotation of this tongue between a raised position orthogonal to the end of the blade and a lowered position in the extension of the blade. In addition, the upper cross bar of the buckle has a subjacent front wall (46) capable of abutting against the free end of the tongue.

Abstract: A child locating system including a metal bracelet. The bracelet has a circuitry compartment including a top face, a bottom face, and a periphery formed therebetween defining an interior space. The bracelet further includes a pair of metal straps with a first metal strap coupled at a first end thereof to a first side of the circuitry compartment and a second strap coupled at a first end thereof to a second side of the circuitry opposite the first side. A key actuateable locking mechanism is included for allowing the selective securement of the second end of the first strap and the second end of the second strap in a closed loop configuration about a wrist of a child. A first transceiver mechanism is situated within the interior space of the circuitry compartment and coupled to a power source. The first transceiver mechanism is adapted to deploy a recovery signal upon the receipt of an activation signal via free space.

Abstract: A buckle comprises a pair of push buttons 16 slidably mounted between side walls 4 of a surface cover 2, a spring 19 for outwardly urging the push button, a lock pin 26 mounted on a lower plate 10 and provided to be engaged with a hook of the push button, a lock cover 30 rotatably connected to a connecting pin 14 provided at an end of the lower plate so as to be positioned above the surface cover, and an engaging hole 32 formed in a side wall of the lock cover. An engaging projection 22 of the push button is engaged with the engaging hole so as to lock the lock cover at the closed position.

Abstract: A device for attaching the end of a strap-like member (14), notably a bracelet, to an object, notably a watch, comprising a housing (1,16,31) provided with two latch pins (3,18,33) adapted to be received in facing recesses of the object. At least one of these pins is able to occupy two positions, a first position in which it protrudes from said housing to come to engage in one of the recesses of the object, and a second position in which it is retracted. A rotatable or push-piece type movable control member (10,20,35) solid with a cam (10b,20a,35b) engaging with the inner end (39,18b,34) of one of the pins (3,18,33) and applied against this cam (10b,20b,35b) by biasing means (14,19,32), can be actuated to bring this pin (3,18,33) into the retracted position against the pressure exerted by the biasing means (4,19,32).

Abstract: Wristlet clasp including first and second elements (1, 2), respectively mechanically connected to strands (5, 6) of a wristlet. A third element (3) mechanically connects in a hinged manner the first and second elements (1, 2). A cap (4) is rigidly and removably fixed to the first element (1). This cap includes two wings. The first element (1) is pierced by two transverse holes (15, 16) in which two pins or screws (35, 36) are engaged. One of these two transverse holes (35) is covered by the wings of the cap. The adjustment of the length of the wristlet is effected by connecting the first element and the third element to each other either via the first pin or screw (35), or by the second pin or screw (36).

Abstract: An improved extender device for adjusting the length of a watch or bracelet band is provided. The extender element of the invention comprises a body having a width no greater than the distance measured between the sidewalls of the main watch link and shell, a coupling member formed at one end of the body and having a width substantially equal to the width of the shell, and at least one guide element formed at the other end of the body for accommodating a spring-loaded pushpin. The pin is received between the corresponding sidewall openings of the shell as the shell overlies and otherwise receives the body of the extender element.

Abstract: A clasp or catch for jewelry items or the like, comprises: a first member, for attachment to one end of a jewelry item, having two parallel sides and two transversal bars interconnecting the two sides; a second generally O-shaped but not closed member having one end pivoting around one of the two transversal bars, and the other end securely engaging the other of the two transversal bars; and a third member, for attachment to another end of the jewelry item, similar in construction to said first member, having at least one cross bar for retaining said other end of the second member when not engaged by said other of the two transversal bars.

Abstract: The bracelet clasp is of the type having an unfolding buckle including a base strip (1) onto which at least a first pivoting strip (2) is capable of folding down. A locking device blocks the strips one onto the other.The locking device consists in two tongues (4, 5) raised from the base strip (1) and a fork having the shape of a tuning fork made in the pivoting strip (2), this fork having two branches (7, 8) whose ends (9, 10) are bent, each of said ends being arranged to snap lock onto one of the tongues raised from the base strip when the clasp is in a closed position.The clasp can be advantageously used in connection with a wristwatch bracelet.

Abstract: A watchband securing device includes a variable length rod extending between opposed watch case horns. One of the horns is pivotally connected to the watch case and one end of the rod is connected to the pivotable horn. This enables the rod to pivot laterally between open and closed positions away from and towards the watch case, respectively. After a watchband is threaded on the rod in the open position, the rod is rotated towards the closed position until the opposite end of the rod engages the opposed horn. A camming surface is provided between the rod and the opposed horn that causes the rod to be shortened against a spring force as it engages the opposed horn so that it can become aligned with a bore hole in the opposed horn and engage the borehole by the spring force extending the rod length. To release the rod from the opposed horn, a manual push piece is provided to enable manual shortening of the rod so that it clears the borehole and releases the rod for pivotal motion towards the open position.

Abstract: A latch for an article of jewelry, which comprises two magnetically attractable latch members, each latch member comprising a hollow body defining a cavity and open on one side, the hollow body having a circumferentially extending edge at the open side, a magnetic insert contained in the cavity, and a closure platelet covering the open side of the hollow body, the platelet being friction-fitted in the edge.

Abstract: The invention relates to a clasp (1) for a band or bracelet (2) having two strips (6, 8) articulated with respect to one another by one of their ends across a common hinge (10), having a cover (3) and a base (9) detachably arranged around a common rod (11), which is guided by a transverse branch (6.4) firmly fixed to the first strip (6), having a first bracelet strand (2.1) fixed to the second strip (8), having a tongue (4) mounted on the base (9) permitting the fixing of a second bracelet strand (2.2), a reinforcement of said fixing taking place by lowering the cover (3) onto the tongue (4) and the lowered cover (3) and base (9) are jointly articulated with respect to the first strip (6), making it possible to open the clasp (1) in order to remove the bracelet (2) without undoing the fixture.

Abstract: A jewelry safety claps includes a hook member with a hook disposed thereon. A housing member includes a hole formed thereon for receiving the hook and to be selectively disengageable from the hook. At least one foot is disposed in the housing member and is capable of moving between a first position corresponding to retraction within the housing member and a second position corresponding to extending outside of the housing member. A foot receiving portion disposed on the hook member for receiving the foot and selectively retaining the foot therein prevents disengagement of the hook member from the housing member.

Abstract: A housing (16) is provided for housing necessary members and to be connected to a personal adornment band (1, 2) at an end of the band. A slide plate (18) is slidably mounted in the housing so as to be moved in a longitudinal direction of the band, and connected to the other end of the band, and a push plate (19, 20) is laterally slidably provided in the housing. Ratchet teeth (37) are formed on the slide plate. A lock projection (41) is formed on the push plate, and a spring (21) is provided for urging the push plate for engaging the projection with one of the ratchet teeth at a position selected from a plurality of positions dependent on the ratchet teeth.

Abstract: The clasp wristlet is of the unfolding buckle type comprising first (4) and second (3) strips hinged to each other and comprising a catch fastening (17, 23).At one end (25) of the second strip (3) a cover (19) is mounted so as to pivot, said cover having an opening (21) in which a projecting portion (8) of said second strip is capable of being inserted. When the clasp is in a closed position, the upper face (26) of said projecting portion (8) is situated at substantially the same level as the upper face (27) of the cover (19). In this manner the thickness of the clasp is reduced.The clasp may advantageously be used for a watch wristlet.

Abstract: This adjustment device comprises an adjustment link (6) provided with two parallel articulation axes (5,7) transverse to a bracelet, each serving to connect this adjustment link to two elements of the bracelet forming an endless attachment. This adjustment link is able to pivot about one of its axes (5) to that their respective positions are inverted, these two positions thus corresponding to two determined lengths of the bracelet. In the shorter adjusted position, the adjustment link (6) elastically engages in a recess (8c) of one of the articulated elements (8) of the adjustment link (6) by pressing this element (8) in the direction of the arrow (F.sub.7) so that the adjusted position is maintained as long as the adjustment link (6) has not moved out of the recess (8c) in which it is elastically held by the locking means (8d) of the recess (8c).

Abstract: The extensible bracelet clasp is of the unfolding buckle type. It includes a first assembly (1) comprising a cap (3) and a push-piece (5) adapted to slide on a second assembly (2) in order to adjust the length of the clasp. Such second assembly (2) comprises an arrangement (15) on which the push-piece (5) can act in order to open the clasp, such arrangement (15) and such push-piece being respectively provided with indexing means (16) and positioning means (17) in order to permit adjustment in length of the clasp and to retain the memory of such adjustment when the clasp is opened. The clasp can be used for a watch bracelet.

Abstract: Jewelry having a jewelry clasp comprising a pair of clam-shell-like clasp halves pivotally joined together and movable between an open and a closed position. A pair of hooks are mounted on the inner side of one of the clasp half for interchangeably and releasably attaching to the ends of a string of pearls or chain necklaces. A pair of magnets are attached to the inner side of the clasp halves to maintain the clasp halves in a normally closed position.

Abstract: An arrangement for fastening a wristlet onto a watch the middle-case of which is provided on its lateral sides with case-flanks to support lugs for the fastening of the wristlet and formed with holes for the axial engagement of the ends of the lugs and wherein at least one flank is movably mounted with respect to the case so that it may perform a movement for disengaging the lugs from their engagement holes and a pivoting movement into a position in which the ends of the lugs are remote enough from the flank formed with their engagement holes in order to permit the withdrawal of the ends of the wristlet from the lugs by a translational movement in the axial direction of the lugs.

Abstract: A pair of push plates (11, 12) are slidably mounted in a housing (3) so as to be moved in a lateral direction with respect to a longitudinal direction of a personal adornment band (2), one of the push plates (11) has an upper arm (15) having a thickness of an upper half thickness of the push plate, the other push plate (12) has a lower arm (16) having a thickness of a lower half thickness of the push plate, upper and lower arms are overlapped with each other, and a pair of return springs (13) are provided between the push plates for urging each push plate in an outward direction. A cover (4) has a lock pin (21) secured to the underside thereof to be engaged with engaging hooks (20, 20c) of the push plates. In a coupling state of the buckle (1), an engaging rod (23a) provided on a connecting link (23) of an end of the personal adornment band is held by the cover and the housing which are locked each other.

Abstract: The bracelet clasp is of the unfolding buckle type comprising a base (1) and two strips (2, 4) capable of folding down onto the base. A cover (10) held by a push button (12) maintains the clasp in a closed position.The clasp comprises means (13) for the instantaneous raising of the cover (10) when pressure is exerted on the push button (12) to open the clasp.This device avoids a notch locking device which leads to a laborious manoeuvre for opening the clasp. Incidentally, the strands (8, 9) of the bracelet are hinged onto the strips (2, 4) which allows the bracelet to be presented flat.

Abstract: A fashion belt is provided which is capable of being formed variously out of various kinds of materials to various cross-sectional shapes. The fashion belt is capable of being tightened and loosened. The fashion belt includes a belt body and a buckle, the belt body being provided at one end portion with a fixing member and at the other end portion with locking bores, and the buckle being provided with a locking portion having an end to be fixed with the fixing member, and an opposing end capable of accepting the belt body, after insertion, in order to lock and unlock the belt body in an arbitrary position of insertion. The fixing member is provided with locking projections which are to be fixed by locking with locking bores of the buckle. The buckle has a rectangular cross-section and first and second ends having first and second openings, respectively. The second opening is provided with a locking portion which is to matingly lock with the locking bores of the belt body.

Abstract: A bracelet clasp of the unfolding buckle type comprises a base plate (1) on which at least one hinged plate (2) is capable of being folded. A device enabling the two plates to be locked onto each other in a closed position comprises a first tongue (4) raised on the base plate (1) and a second tongue (5) raised on the hinged plate (2). In a closed position the two tongues are situated back to back and head to tail. The existence of a double tongue enables the locking force of one plate on the other to be doubled.

Abstract: A clasp of the unfolding buckle type comprises a branch and an arm hinged at one of its ends to a first end of the branch. The branch has a lateral side face arranged opposite a lateral side face of the arm in a closed position of the clasp, and the clasp includes an elastically deformable element for jamming the clasp in the closed position. The elastically deformable element in the closed position of the clasp extends into a housing formed by a longitudinal hollow provided in the lateral side face of the branch and by a longitudinal hollow provided in the lateral side face of the arm.

Abstract: This invention provides a fashion belt capable of being applied to various kinds of materials and various cross-sectional shapes, and tightened and loosened easily. This fashion belt is formed by a belt body (1), and a locking member 30 capable of fixing one end portion of the belt body thereto, receiving the other end portion of the belt body so that the tightening length of the belt body can be regulated, and locking and unlocking the second-mentioned end portion thereof in an arbitrary position of insertion thereof.

Abstract: A buckle for watch bands has a cover (1), a guide housing (15) secured to an inside of the cover, the guide housing having a pair of push plates (19) each of which has an engaging projection (21) and springs. A middle plate (16) and a tongue (6) are rotatably connected to an end of the cover, and a bottom plate (18) having a band connecting portion and an engaging lug (23) is rotatably connected to the middle plate. A band is connected to the band connecting portion of the bottom plate. Another band having adjusting holes is inserted into a space between the cover (1) and the housing (15) and the tongue (6) is inserted into the adjusting hole so as to adjust the length of the band.

Abstract: A folding clasp for a bracelet, including a shank comprising two parallel side members each of which have a first end and a second end, wherein the first end of one parallel side member is connected to a first end of another parallel side member and wherein the second end of one parallel side member is connected to the second end of the other parallel side member, and at least one transverse element interconnecting each of the parallel side members; a first arm having one end articulated at the first end of each of the parallel side members; and another arm articulated at the second end of each of the parallel side members, so that the first arm and the other arm are adapted fold down and lock in the shank on a transverse element, wherein each of the first arm and the other arm includes a head, having on a front face a concavity for compressing on the transverse element and on a bottom face a recess located behind the concavity, for receiving a bracelet end and for locking the arm inside the shank.

Abstract: A buckle for a watch band has a housing connected to the watch band, a pair of push plates provided in the housing so as to be moved in a lateral direction, and a pair of springs for urging the push plates. A pair of stopper pins are provided for stopping the push plates urged by the springs. A cover having a lock pin is pivotally connected to an end of the housing. The cover is provided such that the lock pin is inserted into an opening of the housing and engaged with hooks of the push plates. An opening spring is provided between the housing and the cover for urging the cover to an open position.

Abstract: A buckle has a cover rotatably connected to an end of one of bands, a middle plate rotatably connected to the cover, and a bottom plate rotatably connected to the middle plate and rotatably connected to the other band. A guide housing is secured to an underside of the cover, and a pair of push plates are slidably mounted in the guide housing. A spring is provided between the push plates for outwardly urging the push plates respectively. A slant is formed on an engaging projection of the push plate. A pair of lugs are formed on the bottom plate. Each of the lugs has an engaging hole and is arranged such that the lug is engaged with the slant so as to inwardly move the push plate, and that the engaging hole engages with engaging projection of the push plate, thereby coupling the buckle. A leaf spring is provided for urging the cover in a disengaging direction.

Abstract: The closing device consists of a frame (12) and opposed arms (14) with hook (18) designed to be inserted in the central bolt (20). In the latter, which is bounded below by the base (24) and above by the crosspiece (30) there is arranged in a sliding manner the plate (28) with openings (32), (36) and (34). The latter receives the spring (42) while in the openings (32) and (36) are engaged the hooks (18) of the arms (14).The end (28') of the plate (28) is drawn manually outward and brings about simultaneous unhooking of the arms (14) to which are constrained the band branches.Additional forms of embodiment call for the use of a bolt (60) with pushbutton (68) for simultaneous unhooking of the arms (54) and a bolt (90) with pushbutton (98) which moves opposed shaped plates (94), (94') which constrain the arms (84).

Abstract: A pair of fasteners for a wristwatch strap having two ends are connected to opposite sides of a watch case, each of which includes an arcuate catch element (3) provided with guide members (5, 28) extending longitudinally of the strap (2) and an end engagement member (11), and a pair of slide elements (16), each of which is provided with a latch member (20, 32) complementary to engagement member (11), are connected to the two ends of the strap. Each slide element (16) is slidable along a guide member (5, 28) between an advanced position, in which the strap (2) is shortest and in which a latch member (20, 32) engages an engagement member (1), and a retracted position, in which the strap (2) is longest.

Abstract: This fastener comprises two elements (3, 4) connected to the band (1), the first element (3) including a pin (9) adapted to be fitted into retaining bearing surfaces (12) defined by hooks (13) on the second element (4), and a clasp (11) associated with the pin (9) and capable of being swung over and locked onto the second element (4). The second element (4) is provided with a safety hook (16) pivotally mounted on a transverse pin (10) of the second element and capable of being clipped onto the pin (9) of the first element (3) before the clasp (11) is swung over onto the second element (4). The fastener may be easily adjusted with one hand and does not require the provision of adjustment orifices on the band and hides the free end portion of the band, this end portion of the band being indeed interposed between the surface of the object surrounded by the band and the end portion (1a) of the band carrying the first element (3).

Abstract: An end connector for connecting an end of an expansible watch band to a conventional spring bar or the like carried on a watch case. The end connector includes a planar base member having one end inserted into the end of the band in mechanical engagement with staples interconnecting the top and bottom links, and having its opposite end protruding beyond the end of the band and coupled to the spring bar. A cover overlies the protruding portion of the base member and the spring bar and is secured to the base member at a position interposed between the endmost top link and the watch case.

Abstract: A strap for holding a wristwatch has a pair of separable flexible strap ends adapted to curve around the wrist and to overlap one another to provide an overlapped section. At least one strap end of thermoplastic material has particles of permanently magnetizable material embedded in the thermoplastic material and magnetized to provide rows of alternating magnetic poles. The strap ends have surfaces contacting one another throughout the overlapped section and mutually nesting uniformly spaced interlocking teeth, whereby the magnetized particles provide a holding force resisting separation of the strap ends, while the nested teeth prevent sliding disengagement movement between strap ends.

Abstract: The clasp of this invention include a first element (1) bearing a hook (4) and a second element (6) under which is arranged a catch (9). The second element is provided with an opening (8) giving access to two identical holes (11, 17) arranged side by side in the longitudinal direction of the bracelet. The hook may be latched as desired by the first (11) or the second (17) hole is accordance with whether one wishes the bracelet to be tight or looser around the wrist. In closed position the beak (5) of the hook will be located under the catch. In order to open the clasp one presses the push button (10) which forms an integral part of the catch. Such clasp may be employed for a wrist watch.

Abstract: A device for fastening a strap to a buckle, in particular a leather strap to a self-extending buckle of a wristwatch comprises spindle around which a band making up the strap is coiled, and a support holding a first part of the band in place coiled around the spindle. In addition, the device includes two posiitoning devices of one piece with the support, located one on each side of the band and whose ends, separated one from the other by a distance smaller than the width of the band, are located at a sufficient distance from the spindle toward the strap so that the edges of the second part of the band coiled around the spindle and located on the side opposite to the first part bearing on the support, may, by twisting the band along lines parallel to its length, be inserted underneath the positioning devices in order to determine the useful length of the strap.

Abstract: An end connector for connecting an end of a watch band to a watch case. The watch case has spaced lugs adapted to accommodate a conventional spring bar or the like removably engaged therebetween. The watch band is of the expansible type with a row of top links overlying a row of bottom links, and with spring loaded elements for interconnecting the top and bottom links in a manner permitting longitudinal expansion and contraction of the band. The end connector comprises a generally flat shank having a hook portion at one end and a tab portion at an opposite end. The shank is configured and dimensioned for insertion into the end of the watch band between the rows of top and bottom links. The tab portion is bent out of the plane of the thus inserted shank into an interlocked position protruding between two adjacent bottom links, and the hook portion is engaged with the spring bar.

Abstract: An articulated device, consists of three parts (2, 5, 6), for permitting to wear or take off a wrist-watch (1) connected to a strap (7), of a sole length. The first part (2) of this device is so shaped as to receive and partially protect the watch (1). Said part (2) is formed by two parts (3, 4). The part (3) shaped as an annular frame is hinged, at one of its ends, to the intermediate part (5), which at its other end is pivotally connected, to the part (6), so that the parts (5, 6) can rotate in opposite directions to each other. The part (6), at one of its ends is hinged to the end portion (7b) of the strap (7), while the other end (7a) of this latter is hinged to the opposite end of the part (3). The hinge axes (x--x, y--y, w--w, z--z) of the parts (2, 5, 6) are parallel to each other. The articulated device comprises a spring locking means (15 to 22) including a manually controllable releasing means.

Abstract: A bracelet or wrist watch clasp which is completely hidden when closed. Studs having enlarged heads project from a central body which engages the wrist. Side legs are hinged to each end of a central body to swing to a closed position on the body. Each let has an annular radially elastic element retained in the thickness of its wall and positioned to receive and latch on a stud as the legs are swung to the closed position. Ends of the bracelet or watch band are connected to the free ends of the legs.

Abstract: A two-part clasp has female and male members with the female member being provided with a bore and a slot and into which a prong on the male member interfits for lateral engagement. The female member is provided with a latch which moves beneath the members to engage the male member and prevent it from lateral disengagement with the female member.

Abstract: A double-safety catch for a bracelet, for example a watch bracelet, has a first closure element pivotally mounted at one end of a first portion of the bracelet for swinging about an axis transverse to the length of the bracelet. The first closure element passes through an opening in the end of the second portion of the bracelet and has a projecting catch which prevents accidental withdrawal of the first closure element from the opening and serves for locking resilient engagement with a rib on the first portion to trap the end of the second portion. A second closure element is pivotable about an axis extending longitudinally of the bracelet to cover the first closure element and to engage with a spring locking device which is manually releasable.

Abstract: A connecting member (1, 16, 20) consisting of at least two pivotably joined parts is suggested for the attachment of straps (2) to watches (3). In this arrangement, the mutually pivotable parts (6, 7; 17, 7; 21, 22) exhibit surfaces (14, 15) in contact with each other under spring pressure and having locking tabs and locking recesses, so that the parts (6, 7; 17, 7; 21, 22) of the connecting member (1, 16, 20) are releasably locked together at least after a pivoting by 180.degree..

Abstract: A clasp for a bracelet or similar device including first and second arms hinged for pivotal movement between open and closed positions, wherein a buckle carried by the first arm adjustably receives the end of a first strap therethrough, the free end of the first strap being inserted through an opening provided in the first arm and concealed under a second strap connected to the second arm when the arms are disposed in the closed position.

Abstract: A hinge (7) is used to join two parts (5, 6) of a band or bracelet, the hinge enabling the parts to be attached and detached when the parts are positioned at a predetermined angle relative to each other. The first part (6) comprises an assembly formed of a pin (10) and a first cradle (11) which partially surrounds the pin, with which it is coaxial, wherein a space (12) is provided between the pin and the first cradle. The second part comprises a second cradle (14) which is designed to slide into the space (12) and to be articulated around the pin to keep the two parts attached together within a given angular range. The invention may be employed on a folding clasp of a band for a wristwatch.

Abstract: An extensible clasp is described for use with a continuous flexible wristlet, as for a watch. The clasp comprises first and second elongated portions that are connected by a hinge pin. The first portion is slightly curved to conform to the shape of a wrist and is formed of two parts that can slide along each other, with one part carrying the hinge pin at one end and being formed with a single hole near its other end, and the other part being formed with several aligned holes arranged selectively to register with the single hole. The second portion is also curved, but slightly more so, and carries a beak element which, upon the two portions being folded over each other to close the clasp, is pushed through a registering pair of holes to lock the clasp in a selected position.

Abstract: An extensible clasp is described for use with a watch strap of flat flexible material having at one end a portion formed with a loop fitted with a buckle and at the other end a portion providing apertures for the tongue of the buckle. The clasp comprises first and second elongated portions that are connected by a hinge pin. The outer end of the first elongated portion is pivotally mounted on one of two pins of a link element, the other pin being fitted in said loop after removal of the buckle. The second elongated portion consists of a flattened sleeve into which the apertured end portion of the strap is inserted and secured by a screw. The strap thus becomes continuous and is unlikely to slip off when being fitted round a wrist. To close the clasp, the two elongated portions are folded against each other and a hole near the outer end of the first elongated portion is pressed into locking engagement with a beak element on the second elongated portion.

Abstract: This wristlet clasp with unfolding buckle has a central portion made of two curved plates of which the relative position is adjustable and which can be secured by means of screws, the arms hingedly connected to the ends of this central portion being provided with side webs adapted to be secured by snap action to the widest element of the central portion of the clasp. The ends of the two arms to which the wristlet sections are attached and the gap possibly left between these ends in the closed clasp position are concealed by a cover plate adapted to be decorated.