1. A noncontact coupler comprising a pair of magnetic cores each having a U-shaped open magnetic path, a primary coil and secondary coil being wound around said cores separately respectively, said coupler transmitting AC electric power between said primary and secondary coils by means of an annular closed magnetic path formed by opposing in proximity both open magnetic face sides of said cores, wherein each of the primary and secondary magnetic cores is split laterally into sections, and gaps through each of which part of a spatial magnetic path passes are interposed between adjacent ones of said split sections.
2. A noncontact coupler according to claim 1, wherein each of said primary and secondary magnetic cores is formed by a plurality of core members and gaps through each of which part of a spatial magnetic path passes are interposed between adjacent ones of said core members.
3. A noncontact coupler according to claim 1, wherein each of said primary and secondary magnetic cores is formed by fan-shaped core members and fan-shaped gaps having the same shape as said core members are interposed between adjacent ones of said core members.
4. A noncontact coupler according to claim 1, wherein each of said primary and secondary magnetic cores is formed by a plurality of elongated magnetic members extending radially and arranged around a circle.
5. A noncontact coupler according to claim 4, wherein said elongated magnetic member is board-shaped and has uniform thickness entirely.
6. A noncontact coupler according to claim 1, wherein said primary and secondary magnetic cores are formed respectively by the same odd numbers of core members extending radially and arranged at equiangular intervals, and said primary core members and secondary core members are arranged such that each core member of one of the primary and secondary magnetic cores is placed level with one of the gaps between adjacent ones of the core members of the other to form a magnetic coupling between said primary and secondary coils with the arrangement.
7. A noncontact coupler comprising a pair of magnetic cores each having a U-shaped open magnetic path, a primary coil and secondary coil being wound around said cores separately respectively, said coupler transmitting AC electric power between said primary and secondary coils by means of an annular closed magnetic path formed by opposing in proximity both open magnetic face sides of said cores, wherein each of the primary and secondary magnetic cores is formed by an annular outer circumferential core member, a disc-shaped inner circumferential core member, and a number of intermediate core members extending radially that bridge between both said circumferential core members.
8. A noncontact coupler according to claim 7, wherein an inner circumferential edge of each said intermediate core member is tapered.
9. A noncontact coupler according to claim 7, wherein an outer circumferential edge of each said intermediate core member is broadened in the width.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A system for a landing site for a helicopter or a load suspended from a helicopter, the system comprising landing positioning references that are visualised as a luminous pattern on the landing site, wherein the landing positioning references are formed as lines of light projected on to the landing site from at least one light source arranged at the landing site.
2. A device according to claim 1, wherein the at least one light source constitutes one of several light source sets which together form a light source system encircling the landing site.
3. A device according to claim 1, wherein the at least one light source is a line light source.
4. A device according to claim 3, wherein the line light source comprises an optical system that may be manipulated by an actuator system connected to a light source control unit and is arranged to be able to direct a portion of a light beam collection toward any area of the landing site and to orientate a projected light line segment in a desired horizontal direction on the landing site.
5. A device according to claim 3, wherein the line light source comprises an optical system provided with several light line generating means that each, independently of each other, are arranged to be able to orientate a projected light line segment in a desired, horizontal direction on the landing site to thereby be able to project intersecting light lines.
6. A device according to claim 1, wherein the at least one light source is a point light source.
7. A device according to claim 3, wherein the point light source comprises an optical system that may be manipulated by means of an actuator system connected to a light source control unit and is arranged to be able to direct a light beam bundle toward any area of the landing site and to orientate a projected light point on the landing site.
8. A method for forming of landing positioning references visualised as a luminous pattern on a landing site for a helicopter or a load suspended from a helicopter, the method comprising:
projecting light on the landing site from one or more light sources arranged at the landing site.
9. A method according to claim 8, wherein the method further comprises:
forming the luminous pattern by cooperation of at least two line light sources that independently of each other are arranged to be able to project a light line.
10. A method according to claim 8, wherein the method further comprises:
forming the luminous pattern by more light line segments by pulsing a line light source coordinated with a projecting of a light line segment in alternating position and direction.
11. A method according to claim 10, wherein the method further comprises: by means of an actuator system connected to a light source control unit to manipulate an optical system connected to the line light source to thereby direct a portion of a light beam collection toward any area of the landing site and to orientate a projected light line segment in a desired, horizontal direction on the landing site.
12. A method according to claim 8, wherein the method further comprises:
forming the luminous pattern by several light points by pulsing of a point light source coordinated with a projection of a light point in an alternating position.
13. A method according to claim 10, wherein the method further comprises:
operating an actuator system connected to a light source control unit to manipulate an optical system connected to the point light source to thereby direct a light beam bundle toward any area of the landing site.