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
Preferential selection of candidates for delta compression
Method and system of extending battery life of a wireless microphone unit
Variable speed traffic control system
Stack and folding-typed electrode assembly and method for preparation of the same
Vending machine
Pattern identification apparatus, control method and program thereof
  Randomly Featured Patents
Optical system for a real image type view finder
Method and apparatus for transporting one vehicle by another
Elevator speed instruction generating system
Belt and/or buckle assembly
Amplified telecommunication system for wavelength-division multiplexing transmissions
Contact planner
Aircraft control system with a jam isolating coupling
Device for treating growing, dilated or malformed blood vessels and method for treating biological material
Air and liquid pump for cushion shoes, combined a pressure scale and a ball pen
Superabsorbent-containing web that can act as a filter, absorbent, reactive layer or fuel fuse