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
Method and device for managing a turning setpoint applied to at least one turning actuator for the rear wheels of an automobile
Process and apparatus for producing composite material that includes carbon nanotubes
Semiconductor device
Output device, source apparatus, television set, system, output method, program, and recording medium
Motor drive component verification system and method
Sensor interface engineering
Lateral double diffused metal oxide semiconductor device and method of manufacturing the same
  Randomly Featured Patents
Curable organopolysiloxane coating composition containing bicyclic amidine curing catalyst
Beam wobbling for increased downlink coverage and capacity
Stable hydrocarbon-free cosmetic on dermatological olegels and W/O emulsions
Engine spark ignition system capacitive coupler
Tabletop fountain
Multi-dimensional integrated detection and analysis system (MIDAS) based on microcantilvers
Image projecting amusement device
Antenna device
Method and apparatus for multi-stage sputter deposition of uniform thickness layers
Cathode ray tube apparatus and method of manufacturing the same