Concave conic reflector

Claim 2

In a collimated light generating device for reflecting the position of load handling devices and the like, a light reflective element comprising a truncated portion of a substantially concave conical light reflective surface, said light reflective surface being adapted to redirect the rays of light of a substantially collimated beam which are directed onto the reflective surface from a predetermined location into a diverging plane of light substantially collimated in one dimension and adapted to appear as an intense line of light on an adjacent surface.

Claim 3

In a collimated light generating device for reflecting the position of load handling devices and the like, a light reflective element comprising a truncated portion of a substantially concave conical light reflective surface, said light reflective surface being adapted to redirect the rays of light of a substantially collimated beam which are directed onto the reflective surface from a predetermined location into a diverging plane of light substantially collimated in one dimension and adapted to appear as an intense line of light on an adjacent surface.

Claim 4

In a collimated light generating device for reflecting the position of load handling devices and the like, a light reflective element comprising a truncated portion of a substantially concave conical light reflective surface, said light reflective surface being adapted to redirect the rays of light of a substantially collimated beam which are directed onto the reflective surface from a predetermined location into a diverging plane of light substantially collimated in one dimension and adapted to appear as an intense line of light on an adjacent surface.

Claim 5

A device as claimed in claim 1 wherein said light reflective surface is truncated in such a manner that the most intense surface of light of the projected diverging plane of light is the bottom surface thereof.

Claim 6

A device as claimed in claim 1 wherein the truncated portion of the light reflective surface is an arc forming a leading edge of the reflective surface.

Claim 7

A device as claimed in claim 3 wherein said arc is a circular sector.

Claim 8

A device as claimed in claim 1 wherein the truncated portion of the light reflective portion is an arc forming a leading edge of the reflective surface, and the axis of said collimated beam of light is located inwardly of said arc.

Claim 9

A device as claimed in claim 1 wherein said light reflective surface comprises a portion of a substantially concave 45* cone, the vertical axis of which is located centrally forwardly of the light reflective surface, the rays of light of said collimated beam being reflected by the light reflective surface to intersect substantially at said axis and to form beyond said axis said diverging plane of light.

Claim 10

A device as claimed in claim 1 wherein said light reflective surface in one projected view is of a generally crescent shape.

Claim 11

In a collimated light generating device for referencing the position of Load handling devices and the like, a light reflective element comprising a truncated portion of a substantially concave conical light reflective surface, said light reflective element being supported on a fulcrum and adapted to be mounted on triangularly related adjustment means for tilting the element on the fulcrum.

Claim 12

In a collimated light generating device for referencing the position of Load handling devices and the like, a light reflective element comprising a truncated portion of a substantially concave conical light reflective surface, said light reflective element being supported on a fulcrum and adapted to be mounted on triangularly related adjustment means for tilting the element on the fulcrum.

Claim 13

A device as claimed in claim 1 wherein said light reflective element is supported on a fulcrum and is adapted to be mounted on adjustment means for tilting the element on the fulcrum in any one of a plurality of selected directions to adjust the position of the line of light on said adjacent surface.

Claim 14

A device as claimed in claim 1 wherein the collimated beam is substantially parallel to the cone axis of the reflective surface.

Claim 15

A device as claimed in claim 2 wherein the axis of the collimated beam is substantially parallel to the cone axis of the reflective surface and is adjacent the truncated edge thereof.

Claim 16

A device as claimed in claim 5 wherein said collimated beam axis is located adjacent the truncated edge of said reflective surface.

Claim 17

A device as claimed in claim 1 wherein the truncated portion of the light reflective surface is an arc forming a leading edge of the reflective surface, and said collimated beam strikes said surface adjacent said arc.

Claim 18

In a vehicle having a manipulatable load handling device, a light optical means mounted on the handling device being so constructed and arranged as to provide a substantially collimated light beam and to project said light beam from said load handling device as a diverging plane of light collimated in one dimension and in a predetermined attitude in relation to the load handling device such that a visual reference of the position of the load handling device appears in the form of a distinctly perceivable line of light on surfaces in the path of the projected diverging plane of light, said light optical means including a light reflective element having a truncated portion of a substantially concave conical light reflective surface.

Claim 19

In a vehicle having a manipulatable load handling device, a light optical means mounted on the handling device being so constructed and arranged as to provide a substantially collimated light beam and to project said light beam from said load handling device as a diverging plane of light collimated in one dimension and in a predetermined attitude in relation to the load handling device such that a visual reference of the position of the load handling device appears in the form of a distinctly perceivable line of light on surfaces in the path of the projected diverging plane of light, said light optical means including a light reflective element having a truncated portion of a substantially concave conical light reflective surface.

Claim 20

A device as claimed in claim 14 wherein said truncated portion forms a concave arcuate edge of the reflective surface.

Claim 21

A device as claimed in claim 15 wherein said collimated light beam strikes said surface at a location adjacent said edge.

Claim 22

A device as claimed in claim 14 wherein said light reflective element is supported on a fulcrum and is adapted to be mounted on triangularly related adjustment means for tilting the element on the fulcrum.

Claim 23

A device as claimed in claim 15 wherein said light reflective surface comprises a portion of a substantially concave 45* cone, the vertical axis of which is located centrally forwardly of said arcuate edge, the axis of the collimated light beam being substantially parallel to said cone axis.