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Unicomp Model M with removed z key. The exposed buckling spring is visible.
A buckling spring is a type of keyswitch mechanism, popularized by IBM's keyboards for the PC, PC/AT, 5250/3270 terminals, PS/2, and other systems. It was used by IBM's Model F keyboards (for instance the AT keyboard), and the more common Model M. It is described in U.S. patent 4,118,611 (Model F) and U.S. patent 4,528,431 (Model M), both now expired. According to the original patent: "A non-teasible, snap action, tactile feedback, key mechanism of extreme mechanical simplicity and high reliability is achieved."[1]
^US4118611A, Harris, Richard Hunter, "Buckling spring torsional snap actuator", issued 1978-10-03
A bucklingspring is a type of keyswitch mechanism, popularized by IBM's keyboards for the PC, PC/AT, 5250/3270 terminals, PS/2, and other systems. It...
(1986) The sound of an IBM Model M from 1986, with the characteristic bucklingspring sound. Problems playing this file? See media help. IBM Model M13 (1999)...
bucklingspring. The IBM Model M is a large family of computer keyboards created by IBM that began in late 1983 when IBM patented a membrane buckling...
said to have buckled. Euler's critical load and Johnson's parabolic formula are used to determine the buckling stress of a column. Buckling may occur even...
by IBM and later Lexmark. Its mechanical-key design consisted of a bucklingspring over a capacitive PCB, similar to the later Model M keyboard that used...
M Predecessor: Mechanical Capacitive BucklingSpring Keyboards with NKRO". www.modelfkeyboards.com. "Beam Spring Round 2 Keyboard". www.modelfkeyboards...
down their Lexington keyboard factory where they produced Model M buckling-spring keyboards. IBM, their principal customer and the Model M's original...
feel of Cherry MX Green switches are often compared to that of the "bucklingspring" switches on original IBM Model M keyboards. Cherry switches have an...
include: Bucklingsprings in computer keyboards Mattress coils in innerspring mattresses Upholstery coil springs in upholstery Coil springs are commonly...
Maxi-Switch and Unicomp, the vast majority of Model M keyboards feature a bucklingspring key design and many have fully swappable keycaps. The PC keyboard changed...
older IBM keyboards were made with a "bucklingspring" mechanism, in which a coil spring under the key buckles under pressure from the user's finger,...
shut their Lexington keyboard factory where they produced Model M buckling-spring keyboards. IBM, their principal customer—and the Model M's original...
Yellows - Linear 0.50 N N/A 2.0 mm 4.0 mm 50 million I.B.M./Unicomp I.B.M./Unicomp BucklingSpring N/A Clicky >25 million (Model M) >100 million (Model F)...
spring prongs equally spaced from the center rod. The two spring arms each have a retaining block that terminates at the front end. The female buckle...
within a SS belt buckle. The barrels were 5 cm (2.0 in) long and smoothbore. A lever was pressed which allowed the spring-loaded buckle to pivot downwards...
This is a list of episodes for Spring Baking Championship. The series has been presented by Bobby Deen (seasons 1-2), Ali Khan (seasons 4 and 7), Clinton...
single spring: More generally, two or more springs are in series when any external stress applied to the ensemble gets applied to each spring without...
The typical implementation of DST is to set clocks forward by one hour in spring or late winter, and to set clocks back by one hour to standard time in the...
The Rite of Spring (French: Le Sacre du printemps) is a ballet and orchestral concert work by the Russian composer Igor Stravinsky. It was written for...
(sliding shell) or radially shaped support plates. This prevents buckling of the arc spring. Another result of this support is a hysteresis between the loading...
at Twin Falls, Idaho hoped that the cross might counteract twisting and buckling seen in varieties at the time. With this cross, snap pea was recreated...
Other forms of buckling include lateral torsional buckling, where the compression flange of a beam in bending will buckle, and buckling of plate elements...
box chassis frame, transverse leaf spring front suspension and a conventional Ford rear axle. A total of twenty Buckles were produced, including two incomplete...
200 is a NASCAR Xfinity Series stock car race that takes place during the spring at Dover Motor Speedway. The race was broadcast in the United States on...
The 2004 Iraq spring fighting was a series of operational offensives and various major engagements during the Iraq War. It was a turning point in the war;...
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