DE1964487A1 - Tool for setting precious stones and method for producing a setting that can be machined with this tool - Google Patents

Description

DIA ₁ MANTS & JOAILLERIE HENRI FAVRE SA. SAINT-CLAUDE

(France)

Tool for setting precious stones and method for producing a setting that can be machined with this tool

The invention relates to a tool for setting precious stones with a part that is axially displaceable relative to the setting and which, after the stone has been inserted into the setting, presses on the edge of the setting or on approaches provided on the edge of the socket, this edge or these approaches are bent inward.

Such tools are already known (German Patent 208 008) and are constructed in such a way that, by means of one and the same tool, first on the surface of the body of the mount in one operation a groove concentric to the seat of the stone is hollowed out, thereby forming the wreath serving to set the stone and then this wreath is turned over and pressed down on the stone. A milling cutter with curved inner surfaces is used for this purpose. With this well-known However, the tool has the disadvantage that, on the one hand, the chips produced during the milling of the groove and the decorative surface are bothersome the setting and possibly also that of the stone

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can and on the other hand the stone during these machining operations can shift or tilt in its seat,

The problem of keeping the stone correctly adjusted while bending the edges of the setting in its seat also arises with others known tools, so that these tools are usually not for an economical series production, in particular at least partially automatic setting of stones are suitable.

The invention is based on these disadvantages of known tools to avoid setting gemstones and to create a device that allows the correctly adjusted position of the stone in to ensure its seat during the bending of the edges of the socket or the lugs serving as retaining tongues on the edge of the socket.

Starting from a tool of the type described above is the The invention for solving this problem is characterized in that the axially displaceable part of the tool has a sleeve with one on the provided on the lower end face, which are frustoconical and expand downwards Recess with a conical surface serving to bend the edge or the approaches of the socket and inside the sleeve from the bottom of the recess protruding punch is mounted axially displaceably, which before touching the conical surface mentioned on the surface of the stone and this during the rest of the time Downward movement of the sleeve towards the socket in its seat centered. Preferably, the stamp is under the action of a spring arranged in the sleeve, which the stamp from the Pushes out the bottom of the recess mentioned.

The invention also relates to a method of making a The version that can be machined with the described tool. This verse

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1964t87

driving is characterized in that from one to the axial length The rod cut to the desired setting is assumed, a central opening with an enlarged one that forms the seat for the stone Drilled recess and then in the face adjacent to this seat face at least one axial, extending over a diameter of the Version extending incision is milled to form bendable approaches. Preferably in the last-mentioned operation Two incisions oriented at right angles to one another are made, so that four bendable lugs are formed on the edge of the socket. The widened recess is preferably formed at least partially by a conical surface, which a good fit for one with a corresponding conical surface on its underside provided stone guaranteed. In addition, the version formed in this way can be attached to her the end facing away from the seat surface can be turned along a certain axial area in such a way that one is suitable for fastening this socket Socket or socket with a diameter is formed, which is less than the initial diameter of the rod.

The invention is based on the drawings of execution s be is pielen explained in more detail. Show it:

Fig. 1: the partially sectioned view of a tool according to Invention after the punch has been placed on the stone and before the downward movement of the tool sleeve,

Fig. 2: the same tool according to Fig. 1 after lowering the sleeve onto the edge of the socket,

Fig. 3: the cut to the desired axial length rod for Formation of a frame,

Fig. 4: the same rod after drilling a central opening with i! JrnT db seat; educational extension and

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1964-87

Fig. 5: the finished version after attaching two diametrical Incisions on the top and formation of a nozzle with a smaller one Diameter at the bottom.

According to Fig. 1 is a stone 1 with a conical bottom in a Inserted version 3, which has a central bore with a conically widening recess on the top. The opening angle the conical surface 2 delimiting this extension corresponds to the j. Opening angle of the conical surface of the stone 1, so that a defined seat

for the stone 1 is formed. The upper edge of the socket 3 can expediently, As explained later with reference to FIG. 5, have several incisions in such a way that several bendable and as holding tongues serving approaches are formed, whereby the quality of the attachment of the Stone in-the version is increased.

The tool has a sleeve 4, in the axial opening of which a punch 6 is slidably mounted. On the lower face is the central one Opening of the sleeve 4 enlarged by a recess, the circumference of which s wall is formed by a frustoconical surface that widens downwards. The punch 6 is arranged in the sleeve 4 by a Spring 7 normally from the bottom of this recess by a certain amount Stretched out in such a way that when lowering the tool on the version 3 already provided with the stone 1 is initially supported by the outer end face of the punch 6 on the surface of the stone 1 (Fig.l). This outer end face of the punch 6 is preferably the shape of the The surface of the stone 1 is adapted and, in the exemplary embodiment under consideration, like the surface of the stone 1, is flat.

If now the sleeve 4 of the tool is pushed further axially downwards is, then on the one hand the punch 6 is pressed against the action of the spring 7 on the stone 1, which in this way during the further Work operation is held in a centered position on its seat 2,

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and on the other hand, the frustoconical surface 5 of the sleeve 4 bends the impact on the edge of the socket or on the incised Approaches of the version 3 (Fig. 2) this edge or these approaches inward on stone 1,

The tool described is particularly suitable for the semi-automatic or Automatic setting of gemstones suitable in series production and guarantees that the stones are kept during the bending of the edges of the settings be held centered under elastic pressure on the seat of the frame and cannot shift or tilt, which is not the only thing entails a committee of the setting, but also the stone itself could damage it.

Particularly suitable for machining with the tool according to the invention Sockets can be produced in an economical and simple way by that according to Fig. 3 from one to the axial length of the desired Socket cut rod 11 goes out, in this rod a central OeffnunglZbohrt, which on the later top of the mount through a The conical surface 13 is expanded (FIG. 4), and then at the one adjacent to the conical surface 13 Face at least one over a diameter knife A-A or «B-B extending axial incision so that at least two easily bendable lugs 14 are formed. The axial depth of this The incision expediently extends, as shown in Fig. 5, Beyond the area of the conical surface 13. Appropriately be two incisions oriented at right angles to one another along the diameter A-A and B-B attached so that four can be bent and used as holding tongues for the stone serving approaches 14 arise,.

Furthermore, the version formed in this way, as also shown on JFig .. 5, can be used their lower area turned off over a certain axial height in this way be that a nozzle 15 or, a sleeve with a smaller diameter than the original diameter of the rod 11 for attachment

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the frame is generated.

These processing operations can be carried out with commercially available. machinery to be carried out economically and quickly.

The invention is not limited to the exemplary embodiments described, but allows many variants with regard to the design of the tool and the process steps for the production of frames. '

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* ORIGINAL INSPECTED

Claims (5)

PATENT CLAIMS 1 »Tool for setting gemstones with an axial to the setting movable part, which after inserting the stone in the setting while pressing on the edge of the frame or on the edge of the frame intended approaches to bend this edge or these approaches inward, characterized in that the axially displaceable part has a sleeve (4) with a downward widening provided on the lower end face frustoconical recess with one to bend the edge or the approaches of the socket (3) serving conical surface (5) is and within the sleeve (4) a protruding from the bottom of the recess Stamp (6) is axially displaceable, which is in front Touching the conical surface (5) is supported on the surface of the stone (l) and this during the further downward movement of the sleeve (4) in Direction of the holder in its seat (2) centered. 2. Tool according to claim 1, characterized in that the punch (6) under the action of a spring (7) arranged in the sleeve (4) the bottom of the recess mentioned is pushed out downwards. 3. Method of manufacturing a tool for machining socket suitable according to claim 1, characterized in that a rod (11) cut to the axial length of the desired socket assumed a central opening (12) with an enlarged recess forming the seat (13) for the stone and then drilled into the Seat surface (13) adjacent end face at least one axial, over a diameter (A-A or B-B) extending incision for formation at least two bendable lugs (14) is milled. 4. The method according to claim 3, characterized in that two at right angles diametrical incisions oriented towards one another on the front 009842/0085 BATH Be attached to the front of the socket. ' 5. ' The method according to claim 3 or 4, characterized in that the the area of the socket facing away from the seat surface (13) is rotated along a certain axial distance to form a connecting piece (15), the The diameter is less than the diameter of the original rod (11). ' • S § SS i> 2 1 .0 0 η S ORIGINAL INSPECTED Blank page