Resources Contact Us Home

Image Number 2 for United States Patent #7654220.

An indicator has a permanent magnet and a coil rotatably supported on the permanent magnet and wound so as to form a surface that is parallel to and disposed at a preselected distance from a bottom surface of the permanent magnet. The coil generates a torque by interaction with a magnetic field of the permanent magnet upon supply of a current to the coil. An indicator needle is mounted to undergo rotation with the coil through a range of angles corresponding to indicator angles of the indicator needle. A pair of spiral springs urge the indicator needle in a direction opposite to a direction of the torque to undergo rotation through the range of indicator angles. The pair of spiral springs comprise a first spiral spring connected at one end thereof to one end of the coil and a second spiral spring connected at one end thereof to another end of the coil. The first spiral spring is larger than the second spiral spring and is arranged on an outer peripheral side of and coaxially with the second spiral spring so that the first and second spiral springs lie on a common plane.

  Recently Added Patents
Mobility management in a communications system
Peered proctoring
Fast carrier allocation in multi-carrier systems
Image processing apparatus capable of using replacement component, image forming apparatus capable of using replacement component, and method of administrating replacement component
Dynamic web page construction based on determination of client device location
Methods and apparatus for adapting network characteristics in telecommunications systems
Motor vehicle, toy and/or replica
  Randomly Featured Patents
Selective power reduction of memory hardware
Semiconductor device and method of manufacturing the same
Three-dimensional ornament and method of making same
Pharmaceutical composition for the treatment of high blood pressure
Process of purifying and producing high purity aromatic polycarboxylic acids
Capstan shaft thrust pad device
Automatic firearms having a bolt assisted by an additional mass
Device and method for passively activating inductive loop sensor
Coal hydrogenation process with direct coal feed and improved residuum conversion
Geared motor with an improved lubricating seal