AU2015202591A1 - A device for locating a position for at least one hole and a hole position-locating system - Google Patents

Abstract

A device for locating a position for at least one hole to be formed through a surface of a workpiece, with respect to a datum defined by the workpiece, the device comprising a base, which can be located relative to the datum, and a position locator which is coupled to the base and is movable in a guided manner along the base, whereby to locate said position when the base is so located. 13 -_ 24 _l 2o2 2 Fig 1 32 31 __4 3_426 A* -- 3 0 3 0 27 6F 1 1g2 3

Description

- 1 A DEVICE FOR LOCATING A POSITION FOR AT LEAST ONE HOLE AND A HOLE POSITION-LOCATING SYSTEM [0001] The present invention relates to a device for locating a position for at least one hole to be formed through a surface of a workpiece, to a method of using such a device, and to a hole position-locating system. [0002] Accurate and efficient positioning of holes to be formed in a workpiece, to mount hinges or for other applications, is often critical, particularly in cabinet making or carpentry. Typically, such holes must be positioned relative to a reference point on the workpiece, such as an edge of the workpiece. Incorrect positioning of such holes can necessitate costly or time-consuming replacement or repair of the workpiece. [0003] There is thus a need to facilitate efficient and accurate marking and formation of holes through a workpiece surface. [0004] According to a first aspect of the present invention, there is provided a device for locating a position for at least one hole to be formed through a surface of a workpiece, with respect to a datum defined by the workpiece, the device comprising a base, which can be located relative to the datum, and a position locator which is coupled to the base and is movable in a guided manner along the base, whereby to locate said position when the base is so located. [0005] The base can include a portion locatable to an edge of the workpiece whereby the edge defines the datum. Said portion can comprise an edge alignable to the edge of the workpiece such that the base is located relative to the datum. [0006] The base can comprise a gauge arranged to indicate a position of said locator along the base for location of the position for the hole(s). Preferably, the base comprises two gauges, arranged to indicate positions of said locator along the base for location of the position for the hole(s). The gauges can increment in opposite directions along the base so as to indicate the position of the locator relative to respective spaced apart reference positions defined by the device.

-2 [0007] The position locator can be configured with at least one marking alignable with increments of the gauge(s) to indicate said position. [0008] The device can be a hinge mounting hole position-locating device. [0009] Preferably, at least one said marking identifies a said position as a hinge mounting hole position. [0010] The position locator can be configured with at least one aperture through which can be received an implement for forming or marking the position for the hole(s). The implement can be a pencil or pen, which can be received in the hole(s) to mark the position(s) of the hole(s). The implement can also be a punch which can be received in the hole(s), which can make an indentation on the surface of the workpiece, to mark the position(s) of the hole(s). The implement can also be a drill bit, which can be received in the hole(s), to form the hole(s) in the workpiece. [0011] The base can comprise a guide member along which the position locator is movable in said guided manner, and the position locator can be configured with at least one aperture, through which can be received an implement for forming or marking the position for the hole(s), arranged to either lateral side of the guide member. Preferably, plural said apertures are arranged in at least one row parallel to an/the axis along which the locator is movable in said guided manner along the base. Centres of adjacent ones of the apertures in the or each row can be spaced by 35mm or 50mm. The or each aperture can have a diameter of 4.5mm. More preferably, at least one row consists of two rows arranged on opposite sides of said axis. Even more preferably, said at least one row consists of two pairs of rows, the pairs being arranged on opposite sides of said axis. The centres of the apertures in each pair of rows can be spaced by 17 or 18mm. [0012] The base can be locatable to an edge of the workpiece, to inset, a predetermined distance from that edge, an/the axis along which the locator is movable in said guided manner relative to the base. Preferably, one or more locating members are engageable with the edge to effect the location of the base to the edge. Plural said locating members can be spaced apart on an axis parallel to an axis along which the position locator is movable.

-3 [0013] Each of said locating members can be movable between a retracted position, in which it is clear of the workpiece when the base is located relative to the datum, and an extended position in which it can be engageable with the edge to effect said location. [0014] The position locator can be releasably lockable to the base. Preferably, the device can comprise a set screw tightenable to lock the position locator to the base. [0015] The position locator can be defined by a slider. [0016] The base can comprise a guide member along which the position locator is movable in said guided manner. The or each gauge can be provided on the guide member. [0017] In a preferred embodiment of the invention, the base further comprises feet, at spaced apart positions along the guide member, and preferably at opposite ends thereof, which are receivable against the workpiece, and the guide member extends between and is supported by the feet. Said position locator can be provided in addition to said feet. Alternatively, the position locator can be defined by one of said feet. The other of said feet can define a further said position locator which may be movable in guided manner along the guide member. Preferably, the feet are arranged to support the guide member clear of the workpiece when received thereagainst. [0018] A rotational orientation of either or each feet relative to the guide member is adjustable such that, there is an angle of 900 between axes along which the feet extend whereby the device defines a set square. [0019] According to a second aspect of the present invention, there is provided a hole position-locating system comprising: a device as described above, wherein the position locator can be decoupled from the base; and at least one further position locator which can be coupled to the base such that there is formed a device for locating a position for at least one hole to be formed through a surface of a workpiece, with respect to a datum defined by the workpiece, the further position locator being movable in a guided manner along the base to locate that position, wherein the position locators are configured such that either or each of the sizing and configuration of the hole(s) to be formed in the workpiece differs from one locator to another.

-4 [0020] According to a third aspect of the present invention, there is provided hole position-locating system comprising: a device as described above, wherein the position locator can be decoupled from the base; and at least one further base to which said position locator can be coupled such that there is formed a device for locating a position for at least one hole to be formed through a surface of a workpiece, with respect to a datum defined by the workpiece, in which device the base can be located elative to the datum, and the position locator is movable in a guided manner along the base whereby to locate said position when the base is so located, wherein the bases are configured such that either or each of the position and length of a locus of the locator differs in length from one base to another. [0021] According to a fourth aspect of the present invention, there is provided the use of a device as described above to locate the position of the hole(s). [0022] According to a fifth aspect of the present invention, there is provided a method of locating, using a device as described above, a position for the hole(s) with respect to said datum, wherein said base is located relative to said datum and said position locator is moved along the base, whereby said position is located. In one embodiment, the base can be located relative to said datum before the position locator is moved along the base, whereby said position is located. Alternatively, the position locator is moved along the base, before the base is located relative to said datum. [0023] Preferably, the method comprises the position locator which can be configured with at least one aperture, through which can be received an implement for forming or marking the position for the hole(s), and wherein the implement is a hole-forming implement. Preferably, the hole-forming implement is guided in the aperture(s) to form the hole(s). The implement can be a pencil or pen, which can be received in the hole(s) to mark the position(s) of the hole(s). The implement can also be a punch which can be received in the hole(s), which can make an indentation on the surface of the workpiece, to mark the position(s) of the hole(s). The implement can also be a drill bit, which can be received in the hole(s), to form the hole(s) in the workpiece.

-5 [0024] In order that the present invention can be more readily understood, preferred embodiments thereof will now be described, by way of non-limiting example only, with reference to the accompanying drawings, in which: [0025] Figure 1 is a top view of a device according to a preferred embodiment of the present invention; [0026] Figure 2 is a top view of the device as applied to a workpiece; [0027] Figure 3 is a top view of a position locator of the device; and [0028] Figure 4 is a top view of a base of the device. [0029] Referring now to Figures 1 to 4, a device 2 according to a preferred embodiment of the present invention comprises a position locator 4, in the form of a slider, and a base 6 which comprises feet 24, at opposite ends thereof, which are receivable against a workpiece 27 (shown in Figure 2), and a guide member 7 extending between, and supported by, the feet 24. The position locator 4 defines a template for locating positions of holes to be formed in the workpiece 27. The position locator 4 is releasably coupled to the guide member 7 via a removable setscrew 22 received through a slot 20 formed in the guide member 7. [0030] The position locator 4 comprises a body 8 configured in the form of a flat plate having a recess 10 (shown in Figure 3) of a width which is substantially the same as the width of the guide member 7 such that the guide member 7 is received in the recess 10 to form a close sliding fit with the locator 4 whereby it can guide sliding movement of the locator 4 therealong. The recess 10 has a depth such that, when the base 6 is received by the recess 10, an outer surface of the guide member 7 and an outer surface of the position locator 4 are flush. The setscrew 22 is tightenable to lock the member 4 to the guide member 7 and loosenable to permit the sliding movement of the member 4 along the guide member 7. The set screw 22, conveniently, defines a handle via which slidable movement of the position locator 4 can be effected.

-6 [0031] Each of opposed side portions of the position locator 4 is formed with a number of apertures 12, centres of adjacent ones of which are spaced by 35 mm. This allows for the easy marking/drilling of holes at that particular spacing. This is particularly convenient for hinges in which apertures which receive screws to mount the hinge against a surface of a door or cabinet (defining the workpiece) are 35 mm apart. The outer surface of the position locator 4 is formed with markings or indicia, comprising line or arrow markings and text 13 via which a position of the member 4 along the guide member 7 can be determined, as can, correspondingly, the hole position(s) relative to an end of the base 6. Because the device 2 is, in the present embodiment, to be used with hinges, the markings/indicia 13 indicate a conventional spacing between the holes required to mount the hinges and instances of the word 'HINGE'. In particular, these apertures 12 of the position locator are convenient to allow the marking or forming of holes in a door of a cabinet where the door overlays over the opening of the cabinet. [0032] The outer surface of the guide member 7 is marked with gauges 14, 16 adjacent respective ones of opposed longitudinal edges thereof, so as to allow the easy comparison of one or the other of the gauges 14, 16 with an aperture 12 to facilitate accurate measurement of the apertures 12 from a portion 26 of the base 6, which portion, in the present embodiment, comprises an edge of the base 6. Increments of the gauges 14, 16 can both increase from one end portion 26, or in an alternative embodiment, increments of the gauges 14, 16 can also increase from opposite end portions 26 of the base 6. [0033] In the present embodiment, the base 6 can be 560 mm in length which is suitable for marking and drilling holes for mounting hinges on the surfaces of cabinet doors or the inner surfaces of the cabinets. However, the position locator 4 can be removed and mounted to a base 6 which is shorter or longer. [0034] A base 6 can also be interchangeable with a number of position locators 4, where the position locators 4 have been provided with differing markings, text or apertures, each having a different application. In this way, the device 2 can be used for different applications, without requiring a separate device 2 for each application, by merely interchanging the appropriate position locator 4 which suits a particular application.

-7 [0035] In use, as shown in Figure 2, the device 2 is positioned such that the feet 24 abut the surface of the workpiece 27 and an edge 26 aligns with a datum 29 on the workpiece 27, which is usually an edge of the workpiece 27 but may, for example, be a line marked on or formed in the surface. By then sliding the position locator 4 to a predetermined position, measured by the use of one or the other of gauges 14, 16, holes can be formed in the workpiece at an accurate (measured) position from the first datum 29. [0036] Each of the feet 24 is provided with a pair of locating members 30 adjacent opposite ends thereof, as shown in Figures 1, 2 and 4. Each locating member 30 comprises a pin and, at an outer end of the pin, a head 32 which the user of the device can grasp to operate the locating member 30. Each member 30 is movable between a retracted position, in which a leading end of the pin is recessed when the respective foot 24, and an extended position, in which the leading end projects from the underside of the foot 24. Each member 30 may be biased towards its extended position by a spring (not shown), which may be located between the head 32 and the respective foot 24, and the locating members 30 can be releasably locked in their retracted positions, against the bias of the springs, via twist-lock mechanisms operative by rotating the heads 32. A pair of locating members 30, when in the extended state, on one side of an axis parallel to an axis along which the position locator 4 moves along the guide member 7, can be used to locate that pair of locating members 30 to an edge 26 of the workpiece 27, defining a second datum 31. This allows the position of the hole(s) to be marked or formed in the workpiece 27 that are aligned on an axis that is parallel to an axis formed by the pair of locating members 30, and inset a predetermined distance from the second datum 31. In a similar way, the other pair of locating members 30, can be extended, while the first pair of locating members 30 is in a retracted state, and aligned to an opposite edge 26 of the workpiece 27, to allow the position of the hole(s) to be marked or formed in the workpiece 27 to be aligned along an axis formed by the other pair of locating members 30, but inset a predetermined distance from the opposite edge 26 of the workpiece 27. [0037] Each of the feet 24 comprises a pair of apertures 28. Each pair of apertures 28 is configured such that when the position locator 4 abuts the foot 24 that comprises that pair of apertures 28, the centre of each aperture 28 is separated from the adjacent aperture -8 12 in the position locator 4, which is to the same side of the central axis of the guide member as that aperture 28, by the same spacing separating the centres of respective adjacent apertures 12 on that side. Therefore, the centres of the apertures 28, when the position locator 4 abuts the foot 24 comprising those apertures 28, are separated from the centres of the adjacent apertures 12 by 35 mm. This allows the position of the hole(s) to be marked or formed easily near the end portions of the base 6. [0038] Any component of the device 2 may be formed of metal, such as stainless steel or aluminium, or can be formed of a polymer material. [0039] The position locator 4 is interchangeable with at least one other position locator 4 having apertures 12 with differing diameters or which are spaced at differing intervals. Further, the base 6 is interchangeable with at least one other base 6 having a position and/or a length of a locus of the position locator 4 that differs in length. The increments of the gauge(s) 14, 16 may be metric or imperial, and may increase in opposite directions. [0040] In another embodiment, the feet 24 may be omitted so that the base 6 is defined solely by the guide member 7 with the device 2 configured so that the position locator 4 can slide freely when the guide member 7 is placed against the workpiece 27. [0041] Referring now to Figures 5 to 7, there is shown a device 2 according to another preferred embodiment of the present invention. The device 2 comprises a base 6, which comprises a guide member 7 and feet 24', and a position locator 4 in the form of a slider. The feet 24' are guidably movable along the guide member 7, and are themselves in the form of sliders. Figure 5 shows a perspective view of this device 2, where one foot 24' is positioned at an end of the guide member 7 and where the other foot 24' is positioned at a distance from an opposite end. When the feet 24' are located at opposite ends of the guide member 7, the feet 24' act to support the guide member 7 to facilitate movement of the position locator 4 along the guide member 7. [0042] Similar to the position locator 4 in the previous embodiment of Figures 1 to 4, the position locator 4 defines a template for locating positions of holes to be formed in the workpiece 27.

-9 [0043] Each of the feet 24' comprises a body 23 configured in the form of a flat rectangular plate having a recess 25, as shown more particularly in Figure 6, of a width which is substantially the width of the guide member 7, so that the guide member 7 is received in the recess 25' to form a close sliding fit with each respective foot 24'. The recess 25' has a depth such that when the guide member 7 is received by the recess 25', an outer surface of the foot 24' and an outer surface of the guide member 7 are flush. The position locator 4 and feet 24' are releasably coupled to the guide member 7 via removable setscrews 40 received through a slot 20 formed in the guide member 7. The setscrews 40 also conveniently define handles, to effect movement of the feet. [0044] Each foot 24' is provided with apertures 34 adjacent opposite ends thereof, into each of which a shank of a respective locating member 30 can be received. Each of the locating member 30 is removably coupled to a respective foot 24' via such apertures 34, when required. Figure 5 shows a foot 24' where the locating members 30 are absent and another foot 24' where the locating members 30 are present. The locating members 30 function in the same way as the locating members 30 of Figures 1 to 4, as described above. [0045] Referring now to Figures 7 and 9, there are shown bottom and side views of part of a foot 24' which comprises pads 36 of non-slip material, that are positioned laterally inwards of the apertures 34, lower surfaces of which are proud of a lower surface of a body 23 of the foot 24'. The pads 36 allow the feet 24' to grip a surface of the workpiece 27 and therefore assist to position the device 2 correctly and accurately on the surface thereupon. The pads 36, owing to their softness and the fact that, when received against the workpiece surface, they hold the bodies 23 of the respective feet 24 clear of the surface, also prevent damage to the workpiece 27. [0046] The assembly 38 comprising the guide member 7 and feet 24' can be used, without the position locator 4, as shown in Figures 8, 10 and 14. Loosening the setscrews 40 of the feet 24' permits the positions of the feet 24' along the guide member 7 to be slidably adjusted. As exemplified in Figures 8 and 10, the feet 24' are adjustably spaced along the guide member 7 until centres of apertures 28, adjacent to the guide member 7 and located on a side of an axis of the guide member 7, are separated by a distance required between holes to be drilled in the workpiece 27 for receipt of fasteners to fix an - 10 item, such as a handle. The setscrews 40 are tightened to lock the feet 24' with the correct separation therebetween. [0047] Referring to Figure 8, the assembly 38 in use is positioned on a surface of the workpiece27 , in this case, a cabinet door 42, such that the feet 24' abut the surface of the workpiece 27, and an end 26 of the guide member 7 or a specific measurement on one or other of the gauges 14, 16, is aligned to a first datum 29 on the cabinet door 42, such as an upper or lower edge of the door. Each foot 24' has a locating member 30 comprising a pin in its extended state, on one side of an axis of the guide member 7, such that the pins of the locating members 30 can be used to locate the assembly 38 to another edge of the cabinet door 42, defining a second datum 31. This allows the position of the hole(s) to be marked or formed in the cabinet door 42 that are aligned on an axis that is parallel to an axis formed by the locating members 30, and more particularly, the holes are inset a predetermined distance from the second datum 31, or the edge of the cabinet. In a similar way, the other pair of locating members 30 can be extended, while the first pair of locating members 30 is in a retracted state and aligned to another cabinet door which opens in a direction opposite to the first cabinet door 42, to allow the position of hole(s) to be marked or formed in the other cabinet door, so as to form holes for handles. [0048] Figures 9 to 16 are views of parts of a device 2 according to a further preferred embodiment of the invention. The device 2 is similar to that of the previous embodiment, comprising a guide member 7, removable/adjustable feet 24" and a removable position locator 4, but differ with respect to the configuration of the feet 24"and position locator 4. Each of the foot bodies 23" is configured in the form of a rectangular flat plate having a recess 25" configured to receive the guide member 7 such that a longitudinal axis of the guide member 7 can form an angle with a longitudinal axis of the foot 24" between 450 and 900, inclusive. Each recess 25"comprises walls 44, each wall 44 comprising a diagonal section 46 are partly formed at an angle of 450 to the longitudinal axis of the foot and an axial section 48 formed at an angle of 900 to the foot longitudinal axis. The separation between planes in which the diagonal sections 46 lie is the same as the width of the guide member 7, as is the separation between planes in which the axial sections 48 lie. Each foot 24"can thus be located such that its longitudinal axis is located perpendicular to - 11 that of the guide member 7, by bringing the axial wall sections into abutment with the opposite longitudinal edges of the guide member 7, or such that its longitudinal axis is located at 450 to that of the guide member 7, by bringing the diagonal sections 46 into abutment with these edges. [0049] Referring to Figure 13, each of the feet 24", as in the previous embodiment, also comprises a setscrew 40, which when loosened, allows the foot 24" to be rotated relative to the guide member 7 and further allows the foot 24" to be slidably guided along the guide member 7. When the setscrew 40 is tightened, the foot 24" and guide member 7 are locked together in an configuration where the foot axis and guide member axis form any angle between 450 and 900. Figure 8 shows a configuration where the foot 24" and guide member 7 are locked together such that the foot and guide member longitudinal axes are perpendicular to each other, while Figure 14 shows a configuration where the foot 24" and guide member 7 are locked together such that those axes form an angle of 45'. [0050] Owing to the arrangement of their diagonal wall sections 46, the feet 24" can be located at 450 to the guide member 7 in opposite rotational directions, whereby they are mutually perpendicular. Figure 14 shows such a configuration forming a set square at a corner of a table. [0051] As shown in a close up view in Figure 13, a bottom surface of the recess 25" is formed with markings 50, in the form of lines which, when the guide member 7 is received in the recess 25" and oriented such that its longitudinal axis is perpendicular to the foot longitudinal axis, align with increments on respective ones of the gauges 14,16 as the foot 24" is positioned along the guide member 7 therein whereby the position of the foot 24" along the guide member 7, and more particularly the position of the apertures 28, (which function in the same way as the apertures 28 of the feet 24 in Figures 1 to 4) in the feet 24" from either end of the guide member 7 can be determined. [0052] Also possible is an assembly 38' in which one foot 24', 24" is (like the position locator 4) omitted and the other foot 24', 24"is positioned such that it is located at an end of the guide member 7, such that the foot axis is aligned perpendicular to the guide member axis, such an assembly 38' also defining a set square (not shown in the Figures).

- 12 [0053] Components of the device 2 are easily configurable into different assemblies 38, 38' such as those for locating the position of holes to be marked/drilled for hinges, for locating the position of holes to be marked/drilled for handles and for use as a set square. [0054] Any of the foot/guide assemblies 38, 38' described above are also able to be used with a position locator 4, including the position locator 4' as shown in Figures 15 and 16, which is an alternative to that shown in Figures 1 to 3, 5 and 6. Each of opposed side portions of this position locator 4' comprises two rows of apertures 12', 12". Each row comprises apertures 12', 12" having centres which are spaced by 35 mm. In each side portion, apertures 12', 12" in one row align with apertures 12', 12" in the other, the separation between centres of the aligned apertures 12', 12" being 17-18 mm. [0055] The rows of apertures 12', 12" in each side portion allow for the easy marking/drilling of holes in a cabinet, and are particularly convenient for hinges having apertures which receive screws to mount the hinge against a surface of a door 42. In particular, the row of apertures 12' in each of the opposed side portions furthest from the recess 10 is convenient for a cabinet door 42, which is to be mounted over an opening of a cabinet, while the row of apertures 12" closest to the recess 10 is convenient for a cabinet door 42 to be inset into the opening of a cabinet. [0056] While the apertures in the feet have been described as being 4.5 mm in diameters, the apertures may have any diameter as would be required to fulfill the function of marking and drilling holes. Further, the spacing between the centres of the holes may also be of any distance as would be required for a particular application. [0057] While the device has been described as being principally formed of metal or polymer material, the device or any component of the device can be formed of any material known to be suitable for purpose by a person skilled in the art. [0058] While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. It would be apparent to a person skilled in the relevant art that various changes, modifications and improvements can be made therein without departing - 13 from the spirit and the scope of the invention. Thus, the present invention should not be limited by any of the above-described exemplary embodiments. [0059] Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and 'comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps. [0060] The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.

Claims (36)

1. A device for locating a position for at least one hole to be formed through a surface of a workpiece, with respect to a datum defined by the workpiece, the device comprising a base, which can be located relative to the datum, and a position locator which is coupled to the base and is movable in a guided manner along the base, whereby to locate said position when the base is so located.

2. A device according to claim 1, wherein the base includes a portion locatable to an edge of the workpiece whereby the edge defines the datum.

3. A device according to claim 2, wherein said portion comprises an edge alignable to the edge of the workpiece such that the base is located relative to the datum.

4. A device according to any one of the preceding claims, wherein the base comprises a gauge arranged to indicate a position of said locator along the base for location of the position for the hole(s).

5. A device according to any one of claims 1 to 3, wherein the base comprises two gauges, arranged to indicate positions of said locator along the base for location of the position for the hole(s).

6. A device according to claim 5, wherein the gauges increment in opposite directions along the base so as to indicate the position of the locator relative to respective spaced apart reference positions defined by the device.

7. A device according to any one of claims 4 to 6, wherein the position locator is configured with at least one marking alignable with increments of the gauge(s) to indicate said position.

8. A device according to any one of the preceding claims, being a hinge mounting hole position-locating device.

9. A device according to claim 8 as appended to claim 7, wherein at least one said marking identifies a said position as a hinge mounting hole position. - 15

10. A device according to any one of the preceding claims, wherein the position locator is configured with at least one aperture through which can be received an implement for forming or marking the position for the hole(s).

11. A device according to any one of claims 1 to 9, wherein the base comprises a guide member along which the position locator is movable in said guided manner, and the position locator is configured with at least one aperture, through which can be received an implement for forming or marking the position for the hole(s), arranged to either lateral side of the guide member.

12. A device according to claim 10 or claim 11, wherein plural said apertures are arranged in at least one row parallel to an axis along which the locator is movable in said guided manner along the base.

13. A device according to claim 12, wherein said at least one row consists of two rows arrangedon opposite sides of said axis or wherein said at least one row consists of two pairs of rows, the pairs being arranged on opposite sides of said axis.

14. A device according to claim 12 or claim 13, wherein centres of adjacent ones of the holes in the or each row are spaced by 35mm or 50mm.

15. A device according to any one of claims 10 to 14, wherein the or each aperture has a diameter of 4.5mm.

16. A device according to any one of the preceding claims, wherein the base is locatable to an edge of the workpiece, to inset, a predetermined distance from that edge, an axis along which the locator is movable in said guided manner relative to the base.

17. A device according to claim 16, comprising one or more locating members engageable with the edge to effect the location of the base to the edge.

18. A device according to claim 17, comprising plural said locating members spaced apart on an axis parallel to an axis along which the position locator is movable.

19. A device according to claim 18, wherein each of said locating members is movable between a retracted position, in which it is clear of the workpiece when the base is located relative to the datum, and an extended position in which it is engageable with the edge to effect said location. - 16

20. A device according to any one of the preceding claims, wherein the position locator is releasably lockable to the base.

21. A device according to claim 20, including a set screw tightenable to lock the position locator to the base.

22. A device according to any one of the preceding claims, wherein the position locator is defined by a slider.

23. A device according to any one of the preceding claims, wherein the base comprises a guide member along which the position locator is movable in said guided manner.

24. A device according to claim 23, wherein the or each gauge is provided on the guide member.

25. A device according to claim 23 or 24, wherein the base further comprises feet, at spaced apart positions along the guide member, which are receivable against the workpiece, and wherein the guide member extends between and is supported by the feet.

26. A device according to claim 25, wherein said position locator is provided in addition to said feet.

27. A device according to claim 23 or 24, including feet receivable against the workpiece so as to support the guide member, wherein the position locator is defined by one of said feet.

28. A device according to claim 27, wherein the other of said feet define a further said position locator which is movable in guided manner along the guide member.

29. A device according to any one of claims 25 to 28, wherein the feet are arranged to support the guide member clear of the workpiece when received thereagainst.

30. A device according to any one of claims 25 to 29, wherein a rotational orientation of either or each foot relative to the guide member is adjustable such that, there is an angle of 90 between axes along which the feet extend whereby the device defines a set square. - 17

31. A hole position-locating system comprising: a device according to any one of the preceding claims, wherein the position locator can be decoupled from the base; and at least one further position locator which can be coupled to the base such that there is formed a device for locating a position for at least one hole to be formed through a surface of a workpiece, with respect to a datum defined by the workpiece, the further position locator being movable in a guided manner along the base to locate that position, wherein the position locators are configured such that either or each of the sizing and configuration of the hole(s) to be formed in the workpiece differs from one locator to another.

32. A hole position-locating system comprising: a device according to any one of claims 1 to 30, wherein the position locator can be decoupled from the base; and at least one further base to which said position locator can be coupled such that there is formed a device for locating a position for at least one hole to be formed through a surface of a workpiece, with respect to a datum defined by the workpiece, in which device the base can be located elative to the datum, and the position locator is movable in a guided manner along the base whereby to locate said position when the base is so located, wherein the bases are configured such that either or each of the position and length of a locus of the locator differs in length from one base to another.

33. The use of a device according to any one of claims 1 to 30 to locate the position of the hole(s).

34. A method of locating, using a device according to any one of claims 1 to 30, a position for the hole(s) with respect to said datum, wherein said base is located relative to said datum and said position locator is moved along the base, whereby said position is located.

35. A method according to claim 34, wherein the device accords with any one of claims 10 to 15, and wherein the implement is a hole-forming implement. - 18

36. A method according to claim 34, wherein the hole-forming implement is guided in the aperture(s) to form the hole(s).