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
Monolithic widely-tunable coherent receiver
Reducing voltage stress in a flyback converter design
Separate matching models based on type of phone associated with a caller
Image forming apparatus to automatically select a communication condition
Combination of the application of antibodies for immunostimulation together with glucocorticoids
Tri-material dual-species neutron spectrometer
  Randomly Featured Patents
Optical system providing several beams from a single source
Main spindle apparatus and tool holder clamp unit used therefor
Electrically operated fluid control valve
Variable amplitude delay equalizer
Vehicle-mounted electronic component security assembly
Delayed start of elevator car deceleration and creep using VVVF technology
Connection and fixing system for electronic unit
Process for removing sulfur dioxide from flue gas
Loudspeaker with a three-dimensional diaphragm