Vibrational transducer
First Claim
Patent Images
1. a vibrational transducer comprising:
- a coil wound in a longitudinal direction to enclose a chamber extending in the longitudinal direction;
a switching power source, operatively coupled to the coil, for producing an oscillating magnetic field within the chamber;
a rotor assembly extending within the chamber, the rotor assembly including a permanent magnet, the rotor assembly having a rotational axis and a center of mass, the center of mass being located radially distal from the rotational axis the magnet having a direction of magnetization; and
a magnetically susceptible object positioned in close proximity to the coil, mis-aligning the magnet'"'"'s direction of magnetization with a longitudinal axis of the coil when the switching power source is not active.
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Accused Products
Abstract
A vibrating transducer or alarm for a pager, cellular telephone and the like, includes a single coil wound in a longitudinal direction to enclose a chamber extending in the longitudinal direction; a planar substrate, bonded to an outer wall formed by the coil; a switching power source, operatively coupled to the coil, for producing an oscillating magnetic field within the chamber; and an eccentric weight rotor assembly extending within the chamber, where the rotor assembly includes a permanent magnet that provides a rotational force to the rotor assembly when acted upon by the oscillating magnetic field.
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Citations
25 Claims
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1. a vibrational transducer comprising:
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a coil wound in a longitudinal direction to enclose a chamber extending in the longitudinal direction; a switching power source, operatively coupled to the coil, for producing an oscillating magnetic field within the chamber; a rotor assembly extending within the chamber, the rotor assembly including a permanent magnet, the rotor assembly having a rotational axis and a center of mass, the center of mass being located radially distal from the rotational axis the magnet having a direction of magnetization; and a magnetically susceptible object positioned in close proximity to the coil, mis-aligning the magnet'"'"'s direction of magnetization with a longitudinal axis of the coil when the switching power source is not active. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A vibrational transducer comprising:
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a coil wound in a longitudinal direction to enclose a chamber extending in the longitudinal direction; a switching power source, operatively coupled to the coil, for producing an oscillating magnetic field within the chambers and a rotor assembly extending within the chamber, the rotor assembly including a permanent magnet, the rotor assembly having a rotational axis and a center of mass, the center of mass being located radially distal from the rotational axis; wherein the rotor assembly includes a rotor, the magnet is mounted to the rotor, and the magnet has a center of mass located radially distal from the rotational axis; and wherein the magnet is substantially semi-cylindrical, the magnet having a hub, and the magnet is mounted to the rotor substantially along its hub. - View Dependent Claims (13, 14)
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15. A vibrational transducer comprising:
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a coil wound in a longitudinal direction to enclose a chamber extending in the longitudinal direction; a switching power source, operatively coupled to the coil, for producing an oscillating magnetic field within the chamber; and a rotor assembly extending within the chamber, the rotor assembly including a permanent magnet, the rotor assembly having a rotational axis and a center of mass, the center of mass being located radially distal from the rotational axis; wherein the coil is a bifilar wound coil.
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16. A vibrational transducer comprising:
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a coil wound in a longitudinal direction to enclose a chamber extending in the longitudinal direction; a switching power source, operatively coupled to the coil, for producing an oscillating magnetic field within the chamber; and a rotor assembly extending within the chamber, the rotor assembly including a permanent magnet, the rotor assembly having a rotational axis and a center of mass, the center of mass being located radially distal from the rotational axis; wherein the switching power source includes a swept frequency driver circuit operatively coupled to the coil. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A vibrational transducer comprising:
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a coil wound in a longitudinal direction to enclose a chamber extending in the longitudinal direction; a switching power source, operatively coupled to the coil, for producing an oscillating magnetic field within the chamber; and a rotor assembly positioned within the chamber and including a rotor and a permanent magnet mounted to the rotor, the rotor assembly having a rotational axis and a center of mass located radially distal from the rotational axis, the magnet having a direction of magnetization; and a means for mis-aligning the magnet'"'"'s direction of magnetization with the longitudinal direction of the coil when the switching power source is not active.
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24. A vibrational transducer comprising:
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a coil wound in a longitudinal direction to enclose a chamber extending in the longitudinal direction; a switching power source, operatively coupled to the coil, for producing an oscillating magnetic field within the chamber; and a rotor mounted for rotation within the chamber, the rotor including a permanent magnet, the rotor having a rotational axis and a center of mass, the center of mass being located radially distal from the rotational axis; the shape of the rotor being at least partially cylindrical, wherein the rotational axis is parallel to the cylindrical axis of the rotor. - View Dependent Claims (25)
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Specification