This is a preview of upcoming Admiral Shark's Keyboards content. This page is considered work-in-progress and should be treated as such.
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 2 patent(s).
U.S. Utility Patent 4,528,431 (US4528431A)
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| Name | Rocking switch actuator for a low force membrane contact switch |
|---|---|
| Inventors | Edwin T. Coleman, III |
| Assignees | Maxi Switch |
| Description | An invention of a buckling spring actuator for use with a membrane assembly to make a membrane keyswitch, now typically known as "IBM membrane buckling springs". Compared to the previous capacitive design from 1977 (US4118611A), the use of membrane technology approximately halves its production costs. It was used for many Model M family keyboards. |
U.S. Design Patent 362,434 (USD362434S)
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| Name | Adjustable keyboard for a personal computer |
|---|---|
| Inventors | William A. Abell, Jr., David C. Bishop, Edwin T. Coleman, III, John M. Huellemeier, Charles H. Lingle, Peter J. Mendel, Kenneth H. Mimlitch, Edward E. Pollard, Steven A. Silverstein |
| Assignees | Maxi Switch |
| Description | An ornamental design photographing an IBM Adjustable Keyboard or Lexmark Select-Ease Keyboard (Model M15). |