Keyboard Patents

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A gallery of patents that describe technologies or illustrate designs relating to IBM and family keyboards, typewriters and keypunches. This includes keyswitch/actuator designs, ornamental designs (overall appearance), integrated pointing devices such as TrackPoints, and host systems such as PCs, laptops, terminals, consoles and electronic typewriters. All illustrations provided are from the patents themselves, which are believed to be within the public domain. A total of 112 patents have been recorded. The patent list is currently filtered to 1 patent(s).

Japanese Utility Patent 280,929 (JPH0280929U)

Patent diagrams of Alps' spring loaded push-button switch having predictable switching time despite varying spring characteristics at rest (left) and pressed (right)

Applied 12 Dec 1988

Published 21 Jun 1990

More info

Name	Spring loaded push-button switch having predictable switching time despite varying spring characteristics
Inventors	Toshimasa Matsui
Assignees	Alps
Description	An invention of a membrane-diven buckling spring keyswitch designed to be lower in profile and use an integrated slider compared to other buckling spring designs, such as those from IBM (US4118611A, US4528431A). Compared IBM's designs, the spring notably requires a lateral push to buckle rather since it is too short to buckle naturally. This was implemented as Alps buckling springs, which uses an Alps mount-compatible slider and were employed on Alps SM-101 ODM keyboard design and Sega TeraDrive Keyboard (HTR-2106).