55856 GEH:PFB P/00/011 Regulation 3.2 AUS T RALIA Patents Act 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT ORIGINAL Name of Applicant: KUO-SHEN WU Name of inventor: KUO-SHEN WU Address for Service: COLLISON & CO.,1 17 King William Street, Adelaide, S.A. 5000 Invention Title: CLAMPING DEVICE FOR KEY DUPLICATING MACHINE WITH DUAL PIVOTED JOINT The following statement is a full description of this invention, including the best method of performing it known to me: 2 BACKGROUND OF THE INVENTION The present invention relates to a clamping device for key duplicating machine with dual pivoted joint, which can clamp different types of key sample and key blank by simply turning and changing from 5 one of the two confronting side edges of the vises to the other, and can effect duplication of the different types of keys by means of two pivoted joints. Conventional clamping device for key duplicating machine can only be used to clamp with a single side edge a specific type of key e.g. a small 10 size of flat key or a large size of cylindrical key, and hence each type of key requires a specific clamping device. This will result in an increase of the key duplicating cost. Further, in the conventional clamping device for key duplicating machine, the key blank to be processed and clamped on the clamping device can only be cut in a tangential direction by a cutting 15 tool, and can not be cut obliquely, and hence such kind of clamping device can only be used for clamping a key having a teeth pattern of grooves cut in a direction perpendicular to the side plane of the key, and can not be used for those having a teeth pattern of grooves cut obliquely to the side plane of the key, otherwise a special designed and complicated jig is 20 required. The present invention aims at eliminating the above disadvantages and provides a clamping device for key duplicating machine with dual pivoted joint, which can clamp different types of keys by simply turning and changing from one of the two confronting side edges of the vises to the 25 other, and can effect duplication of the different types of keys by means of two pivoted joints. In a preferred aspect of the present invention, the clamping device for key duplicating machine with dual pivoted joint comprises a pair of left and right symmetrical cross grooves formed on the front side of a 3 substrate, and aligned one with the other, for securing a pair of left and right vises, in order to enable the same vises to clamp different types of keys by turning and changing from one of the two confronting side edges of the vises to the other; and two pivoted joints provided on the back side 5 of the substrate, for rotating the pair of left and right vises to a different angular position, and for effecting duplication of the different types of keys. BRIEF DESCRIPTION OF THE DRAWING An embodiment of the present invention will now be described by way of example with reference to the accompanying drawings in which: 10 FIG. 1 is a partial exploded perspective view of a clamping device for key duplicating machine with dual pivoted joint according to the present invention; FIG. 2 is a perspective view of a clamping device for key duplicating machine with dual pivoted joint according to the present invention as 15 viewed from back; FIG. 3 is a perspective view of a key duplicating machine, wherein a clamping device for key duplicating machine with dual pivoted joint according to the present invention is disclosed; FIG. 4 is a view of a clamping device for key duplicating machine 20 with dual pivoted joint according to the present invention, wherein the vises are rotated to a suitable angular position by means of a first pivoted joint; and FIG. 5 is a view of a clamping device for key duplicating machine with dual pivoted joint according to the present invention, wherein the 25 vises are rotated to a suitable angular position by means of a second pivoted joint.
4 DETAILED DESCRIPTION OF THE INVENTION Referring to FIGS. 1. - 5., a clamping device for key duplicating machine with dual pivoted joint which is an embodiment of the present invention, comprises a substrate 1; a pair of left and right symmetrical 5 cross grooves 11 formed on the front side of a substrate, and aligned one with the other, for securing a pair of left and right vises 2, 2'. The left vise 2 is used for clamping a key blank to be processed while the right vise 2is used for clamping an original key sample. By simply turning and changing from one of the two confronting side edges of the vises to the other, the 10 same pair of vises can clamp different types of keys e.g. a small size of a semi-cylindrical key having a teeth pattern of grooves formed obliquely to the side plane of the key as shown in FIG. 1; and a large size of an elongated cylindrical key having a teeth pattern of groove formed in a direction perpendicular to the side plane of the key as shown in FIG. 5. 15 The left and right vises each comprises a screw 21 horizontally secured to the center portion of the cross groove 11 by means of a nut (not shown); a fixed jaw 22 having a back rectangular protrusion 221 formed at the center portion of the back thereof for engagement with the cross groove 11, and two pairs of upper and lower protrusive clamping feet 222, 222' formed at 20 the upper and lower ends thereof, which are provided with a forward > shaped notch part, in order to form a clamping half part 223, 223'; and a movable jaw 23 having two pairs of upper and lower protrusive clamping feet 232, 232' formed at the upper and lower ends thereof. The pair of upper protrusive feet 232 are provided with an upright plane part to form a 25 clamping half part 233 while the pair of lower protrusive feet 232' are provided with backward <-shaped notch part, in order to form a clamping half part 233', and hence one type of a clamping part used for clamping a small size of a semi-cylindrical key having a teeth pattern of grooves formed obliquely to the side plane of the key as shown in FIG. 4 can be 30 formed when the pair of upper clamping half parts 233 of the movable jaw are moved towards the pair of upper clamping half parts 223 of the fixed jaw by means of the screw 21, and another type of clamping part used for clamping a large size of an elongated cylindrical key having a teeth pattern 5 of groove formed in a direction perpendicular to the side plane of the key as shown in FIG. 5 can be formed when the pair of lower clamping half parts 233' of the movable jaw are moved towards the pair of lower clamping half parts 223' of the fixed jaw by means of the screw 21. In this 5 regard, by simply turning and changing from one of the two confronting side edges of the vises to the other, the same pair of vises can clamp different types of keys. A longitudinal rectangular protrusion 224 is formed at the front center portion of the fixed jaw, for engagement with a rectangular groove 231 formed at the back center portion of the movable 10 jaw. A central and two side holes 225, 226 are formed in parallel in an integral portion between the longitudinal rectangular protrusion 224 and the back rectangular protrusion 221 of the fixed jaw and aligned one another. The central hole 225 is formed in two sections of different diameters, and the front section hole is bigger than the rear section hole, 15 and used for receiving a compression spring 24, in order to enable the latter to bias against the movable jaw 23, while the rear section hole is used for passing the screw 21 there-through. Two side holes 226 each is formed in two sections of different diameters, and the front section hole is smaller than the rear section hole, and used for receiving a guide post 25 20 which is having a front end passed through the side hole 234 formed in the intermediate portion of the movable jaw, and is secured on the latter by means of a screw, while the rear section hole is used for receiving a C shaped pin 27 which is inserted into the rear end of the guide post 25, in order to prevent the latter from being removed from the movable jaw 22. In 25 this regard, the movable jaw 23 can be moved straight towards the fixed jaw 22 in accordance with the two parallel side guide posts. The front end of the screw 21 which penetrates through the central hole 235 of the movable jaw 23 is threadedly engaged with a grip 28, in order to drive the movable jaw to move straight towards the fixed jaw 22 by turning the grip. 30 As shown in FIG. 2, the present invention further comprises a horizontal pivoted joint 4 arranged at the back upper end of the substrate 1, for pivotally connecting an engagement base 5, in order to form a first pivoted joint, to rotate the pair of vises to a suitable angular position, and 6 to effect duplication of a small size of a semi-cylindrical key 3 having a teeth pattern of grooves formed obliquely to the side plane of the key. A horizontal pivotal connecting hole 51 is formed in the engagement base 5, for pivotally engaging a horizontal pivoted joint 6, (as shown in FIG. 3) in 5 order to form a second pivoted joint, and to effect duplication of a large size of an elongated cylindrical key 3' having a teeth pattern of grooves formed in a direction perpendicular to the side plane of the key. In the present invention, a securing hole 52 is formed at the side edge of the engagement base 5, and parallels the horizontal pivoted joint 4, for 10 receiving a securing pin 7 which is arranged on the back of the substrate 1, and parallels the horizontal pivoted joint, in order to fix the engagement base on the back of the substrate, to prevent both from being pivotally rotated each other, and to enable the first pivoted joint to become ineffective, as shown in FIG. 5. With this, the user can utilize the second 15 pivoted joint i.e. the user can manipulate a grip 8 which is provided at the lower end of the engagement base, in order to rotate the pair of vises to a suitable angular position, to enable a key blank clamped in the vise being cut in a direction perpendicular to the side plane of the key blank by the duplicating tool 10, and to accomplish a duplication of a large size of an 20 elongated cylindrical key. When a small size of a semi-cylindrical key having a teeth pattern of grooves formed obliquely to the side plane of the key is to be duplicated, the user needs to pull the securing pin 7 out of the engagement base 5, in order to enable the horizontal pivoted joint to pivotally rotate with respect to the engagement base, and to enable the 25 first pivoted joint to become effective. With this, the user needs to manipulate a grip 9 which is provided at the right lower end of the substrate, in order to drive the pairs of vises being pivotally rotated to suitable angular position, and enable the key clamped by the vise being cut obliquely to the side plane of the key, as shown in FIG. 4, and to 30 accomplish a duplication of a small size of a semi-cylindrical key.