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
Manufacturing method of lead frame substrate
System and method for integrating knowledge engines in a cloud computing environment
Network relay apparatus
Radiator grill for a vehicle
L2 method for partial VLAN service migration
Pressure gauge
Temperature sensor interface for wireless and wired charging
  Randomly Featured Patents
Power steering assembly
Knowledge storage and retrieval system and method
Method for monitoring drilling materials for gamma ray activity
Method and apparatus for containing and agitating the contents of a container
Adaptive strategy to control internal combustion engine
Pressure control device for low pressure processing chamber
Plastic laminar digitally indexed dental die system
Bottle transport system
Nozzle arrangement for use in a cooling zone of rolling mill
Bristle and plate subassembly fixture and manufacturing method