Browse Prior Art Database

Snap Action Membrane Switch Keyboard

IP.com Disclosure Number: IPCOM000097498D
Original Publication Date: 1965-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Hayes, RK: AUTHOR [+2]

Abstract

This keyboard device utilizes a laminate structure of membranes. Conductive patterns are etched on the membranes and separated from each other by a mask. A snap-action contact is provided at each key position. There is a dimpled surface medium on the uppermost layer.

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Snap Action Membrane Switch Keyboard

This keyboard device utilizes a laminate structure of membranes. Conductive patterns are etched on the membranes and separated from each other by a mask. A snap-action contact is provided at each key position. There is a dimpled surface medium on the uppermost layer.

The lower left drawing shows the construction for a normally opened switch contact. This is closed by the application of pressure to the push button end 10. When the pressure is removed, the switch returns to its normally open position.

The lower right drawing shows the construction for a normally closed switch contact. It is opened by the application of pressure to the push button 11. When the pressure is removed, the switch returns to its normally closed position.

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