Resources Contact Us Home
Deformable switch keyboard

Image Number 2 for United States Patent #4375585.

A deformable switch keyboard assembly with a flexible unitary top member, a compressible intermediate switch assembly layer and a bottom member providing mechanical support for the intermediate assembly and mechanical isolation for the switching function.The top member has a plurality of switch site defining regions extending in a first direction and located in a predetermined array to define the keyboard. The intermediate switch assembly has a plurality of switch sites each underlying a different one of the top member projections. The bottom member has first and second sets of projections extending toward the top member, each of the first set of projections underlying a different one of the switch sites and providing a compression contact beneath the intermediate switch assembly when the corresponding top member region is actuated to advance in the first direction. Each of the second set of projections is located intermediate different adjacent ones of the switch sites and is longer than any of the first set of projections in order to provide mechanical isolation between an actuated switch site and the remainder of the switch sites.

  Recently Added Patents
Systems and methods for computer-aided fold detection
Circuits for prevention of reverse leakage in charge pumps
Control strategies for a multi-mode drive system
Signal processing apparatus and methods
Cover panel for frame based door lock
Memory device and method for dynamic random access memory having serial interface and integral instruction buffer
Exposure apparatus, exposure method, and device manufacturing method
  Randomly Featured Patents
Device and method for acquiring digital color-infrared photographs for monitoring vegetation
Interferometer device, in particular a stellar interferometer device, incorporating a delay line
Strain relief system
System, method and apparatus for pattern recognition with application to symbol recognition and regeneration for a calligraphic display
Method for manufacturing flame-retardant polyurethane foam
Bus communication and transfer rate negotiation system
System for associating identification and personal data for multiple magnetic stripe cards or other sources to facilitate a transaction and related methods
Integrated circuitry and method of forming a field effect transistor
Vibrating beam pressure sensor
Indole derivatives as selective androgen receptor modulators (SARMS)