GB2349351A

GB2349351A - Optical drilling guide

Info

Publication number: GB2349351A
Application number: GB9910107A
Authority: GB
Inventors: Gordon Geoffrey Silver
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-04-29
Filing date: 1999-04-29
Publication date: 2000-11-01
Anticipated expiration: 2019-04-29
Also published as: GB2349351B; GB9910107D0

Abstract

An optical drilling guide uses mirrors to enable a user to ensure perpendicular alignment of a drill to a surface. The guide comprises a triangular base 10 with a central hole 20 for the passage of a drill bit. Two sides are at 90{ to each other with the third side at 45{ to them. One of the 90{ sides has a wall 18 extending vertically with a plurality of vertically aligned stripes. The side angled at 45{ has a mirrored wall 12 extending vertically. The other 90{ side has a mirrored wall 16 extending upwardly and outwardly from the guide at 45{ to the vertical. Screw holes 22 enable the guide to be affixed to the surface. The guide is used by viewing from above the reflections 26,28 of a drill bit 24 in the angled, mirrored wall 16. The drill bit is aligned normal to the surface when the drill bit reflections are parallel (fig 7) with the reflected images of the stripes.

Description

OPTICAL DRILLING GUIDE This invention relates to a optical drilling guide.

Drilling guides are well known in the D I Y market they usually have to be clamped to the work & have holes which are perpendicular to a base, the twist'drill is a good fit to the holes so you can only use one size drill.

The optical drilling guide is hand held i. e. no clamps & does not come into contact with the drill so you can use any size & type of drill or bit.

According to the present invention there is provided a optical drilling guide comprising of a box with a triangular flat base with three small securing holes plus one large hole & four walls. On the inside of the first wall it has a mirror which is 135 degrees to the base, on the inside of the second wall it has a light coloured background with vertical stripes which is 90 degrees to the base, on the inside of the third wall it has a mirror which is 90 degrees to the base, the fourth wall gives support to the first & the third wall.

A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawing in :- Figure 1 shows in perspective, the optical drilling guide Figure 2 shows a plan view & two sections of the guide.

Figure 3 shows a plan view & the inside walls.

Figure 4 shows reflections from two mirrors.

Figure 5 shows reflections of a round rod leaning in one direction.

Figure 6 shows reflections of a round rod leaning in the opposite direction from figure five.

Figure 7 shows a reflection of a round rod perpendicular to the base of the guide.

Figure 8 shows a hand drill with the guide.

Figure 9 shows a hand drill with the guide from a different direction..

Figure 10 shows the guide screwed & clamped to a flat work surface.

Figure 11 shows the guide screwed & clamped to the edge of a work surface.

Referring to the drawing figure 1 is viewed by looking along line 38 at a angle of 45 degrees, the optical drilling guide comprises a triangular base with four walls. The triangular base 10 is flat with three holes 22 plus one hole 20, wall 16 is at 135 degrees to the base 10, wall 12 & 18 are at 90 degrees to the base 10 & wall 14 give support to wall 16 & wall 12, wall 16 has a flat mirror on the inside, wall 18 has a light coloured background with stripes on the inside, wall 12 has a flat mirror on the inside.

On figure 1-2-3 no reflections are shown, on figure 4 the reflection on the walled mirror 16 is of the inside wall 18 through the walled mirror 16 & the walled mirror 12.

Figure 5 is showing a round rod 24 in the hole 20 leaning away from wall 16, the reflection of rod 26 is only through mirror 16 while rod 28 is through mirrors 16 & 12.

Figure 6 is showing the same as figure 5 with round rod 24 leaning away from wall 18.

Figure 7 is showing a round rod 24 in the hole 20 perpendicular to the base 10 & the reflection from mirror 16 of rod 26, it also shows the reflection from mirror 16 & 12 of rod 28.

Figure 8 is showing a hand gun 34 plus the guide & the line of sight 32, from the line of sight the flat wood drill bit 48 can be seen from two directions so the bit can be aligned perpendicular to the guide base 10.

Figure 9 is showing a hand gun 34 plus the guide & the line of sight 32 from another direction with a twist drill 36, many different sizes & types of drills & bits can be used because they do not come into contact with the drilling guide.

The guide can be held by one hand & the drill in the other, if two hands are used to hold the drill or brace use the description in figure 10 & 11.

Figure 10 is showing the guide can be clamped to the work by screwing through holes 22 to a piece of wood 30 then clamped to the work 40 by clamps 42.

Figure 11 is showing the guide can also be used for drilling mortises & holes for locks to the edge of the work by screwing through holes 22 to a piece of wood 44 to one side of hole 20 then clamping the wood 44 to the work 46 by the clamp 42.

To use the optical drilling guide mark the position to be drilled by a cross place the guide with the cross approximately in the centre of hole 20, put the point of the drill or bit on the cross align the drill by looking preferably with one eye closed at mirror 16 & drill the hole.

Claims

CLAIMS 1 A optical drilling guide comprising a walled box with triangular base with two mirrors on the inside walls & a striped background on another wall, looking from above the position to be drilled you can see in two directions at 90 degrees to each other so you can align the drill or bit perpendicular to the base.
2 A optical drilling guide as claimed in claim 1 wherein any size drill or bit can be used because the drills/bits do not come into contact with the optical drilling guide.
3 A optical drilling guide as claimed 1 or 2 where it can be attached to a piece of wood by fitting screws through the three small holes in the base and then the wood can be clamped to the work to be drilled 4 A optical drilling guide substantially as herein described and illustrated in the accompanying drawings.

3 A optical drilling guide substantially as described herein with reference to figures 1-11 of the accompanying drawings.

Amendments to the claims have been filed as follows 1 An optical drilling guide comprising of a box with three active walls and a right-angled triangular flat base with a central hole, the first wall is on the hypotenuse side of the triangle and has a mirrored inside wall which is 90 degrees to the base, the second wall is on the right-angled side of the triangle and has vertical stripes on the inside wall which is 90 degrees to the base and is connected to the first wall in the corner, the third wall is on the remaining side of the right-angled triangle and has a mirrored inside wall which is 135 degrees to the base and is connected to the second wall in the corner.

2 A optical drilling guide as claimed in Claim 1 looking at the reflection through the mirror at 135 degrees to the base at the drill standing in the central hole it can be aligned with the vertical stripes in one direction, looking at the reflections through the mirror at 135 degrees to the base and the mirror at 90 degrees to the base at the drill standing in the central hole it can be aligned with the vertical stripes in the other direction.