1-22. (canceled)
23. A loudspeaker magnetic motor comprising:
a voice coil the voice coil comprising:
a first layer comprising a first wire coil,
a second layer comprising a second wire coil,
each layer of wire coil comprising a separate respective wire,
the layers of wire coils being connected in parallel, and the second layer of wire coil being layered on top of the first layer of wire coil;
wherein at least one of the coils comprises a conductor having a round cross-section;
the first wire coil is disposed about a support, and
the second wire coil is disposed about the first coil.
24. A loudspeaker comprising:
a voice coil, the voice coil comprising:
a first layer comprising a first wire coil,
a second layer comprising a second wire coil,
each layer of wire coil comprising a separate respective wire,
the layers of wire coils being connected in parallel and the second layer of wire coil being layered on top of the first layer of wire coil.
the layers of wire coils being connected in parallel, and the second layer of wire coil being layered on top of the first layer of wire coil.
25. A loudspeaker according to claim 24, wherein at least one of the coils comprises a conductor having a round cross-section.
26. A loudspeaker according to claim 25, wherein all of the coils comprise wires having round cross-sections.
27. A loudspeaker according to claim 24, wherein the magnetic field source is a permanent magnet.
28. A loudspeaker according to claim 24, wherein the magnetic is a neodymium boron iron magnet.
29. A loudspeaker according to claim 28, wherein the neodymium boron iron magnet has a cylindrical cross-section.
30. A loudspeaker comprising
a diaphragm coupled with a support;
a magnetic field source comprising neodymium;
a voice coil disposed on the support and having two or more wire coils, a first wire coil being disposed about the support. and a second wire coil being disposed about the first coil and layered thereon, the voice coil at least partially disposed in the magnetic field;
the wire coils being connected in parallel with each other such that the voltage drop across a selected coil is substantially equal to the voltage drop across each of the further coils, the coils layered on top of one another.
31. A loudspeaker according to claim 30. wherein at least one of the coils comprises a conductor having a round cross-section.
32. A loudspeaker according to claim 31, wherein all of the coils comprise wires having round cross-sections.
33. A loudspeaker according to claim 30, wherein the magnetic field source is a permanent magnet.
34. A loudspeaker according to claim 30, wherein the magnetic field source comprises a neodymium boron iron magnet.
35. A loudspeaker according to claim 34, wherein the neodymium boron iron magnet has a cylindrical cross-section.
36. A loudspeaker magnetic motor comprising:
a magnetic field source:
a voice coil at least partially disposed in the magnetic field:
the voice coil consisting essentially of two or more wire coils, the wire coils being connected in parallel with each other and layered on top of one another.
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. An electromagnetic switch comprising:
a fixed iron core that is fixed on a casing;
a movable iron core that is arranged to be opposite to the fixed iron core;
a tripping spring that energizes the movable iron core in a direction of separating the movable iron core from the fixed iron core;
an operation coil that is installed around the fixed iron core and generates an electromagnetic force for attracting the movable iron core to the fixed iron core against an elastic force of the tripping spring at a time of magnetization;
a cross bar in which a plurality of rod-shaped movable contactors, each movable contactor having a pair of movable contacts on both ends thereof, is installed, and to which the movable iron core is attached and that moves with the movable iron core;
a plurality of fixed contactors, each fixed contactor having fixed contacts corresponding to the movable contacts, the fixed contacts being arranged so as to be positioned under the movable contacts, wherein the movable contacts contact or leave the fixed contacts in response to magnetization or demagnetization of the operation coil; and
an arc runner that includes a pair of side panels covering the movable contacts and the fixed contacts from a width direction of the movable contactor, a back panel covering the movable contacts and the fixed contacts from a longitudinal direction of the movable contactor, and a top panel covering the movable contacts and the fixed contacts from above, and that is formed of a magnetic material and guides arcs to be generated between the movable contacts and the fixed contacts when the movable contacts and the fixed contacts separate from each other, toward an upward direction of the movable contactor,
wherein the arc runner includes, in a central portion of the top panel, a top panel hole whose flow-path area is larger than an area of gaps formed between the side panels and the top panel.
2. The electromagnetic switch according to claim 1, wherein the side panels are connected to the back panel.
3. The electromagnetic switch according to claim 1, wherein the top panel hole is formed so as to reach the back panel.
4. The electromagnetic switch according to claim 1, wherein an end of the top panel on a side separated from the back panel is bent toward a side of the movable contactor.
5. The electromagnetic switch according to claim 1, wherein the arc runner is formed of a ferromagnetic material.