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Kinesis's first adjustable keyboard, the Maxim, was released in 1997. [3] In 2000, Kinesis entered a strategic alliance with Cramer, Inc. of Kansas City, which manufactured ergonomic seating. Kinesis took over production for the Cramer Interfaces chair arm-mounted split keyboard, [4] releasing a revised version as the Kinesis Evolution in 2001. [5]
Key Ovation makes the Goldtouch ergonomic keyboard which is an adjustable angled split keyboard. On some ergonomic keyboards, the tenting angle is increased to 90° so the user types with their hands perpendicular to the ground, thumbs-up, [9] similar to the hand position adopted by accordion players.
In general, ergonomic keyboards are designed to keep the user's arms and wrists in a near-neutral position, which means the slant angle (the lateral rotation angle for the keys in each half relative to the axis of the home row in a conventional keyboard) is approximately 10 to 12.5°, the slope (the angle of the keytop surfaces starting from the front edge closer to the user towards the top of ...
The Apple Adjustable Keyboard came with contoured plastic wrist rests, and a separate keypad with function keys and arrow keys. This was the third and last time Apple offered a separate numeric keypad. Unlike its predecessors, it was not sold separately. The keyboard also included volume buttons and a record button on the right side of the ...
Proper ergonomic design of computer keyboard desks is necessary to prevent repetitive strain injuries, which can develop over time and can lead to long-term disability. [45] Research suggests that the upright position formerly advocated can lead to degenerative disc disease, and that a 45 degree reclined position is healthier. [46]
The case did not extend down under the keyboard as much, instead, it was raised off the desk by an adjustable foot at the back. This design was lighter than the original at 3.75 pounds (1.70 kg) but otherwise similar in size. The design patent for the Extended Keyboard II (D335,228) was filed on November 15, 1990.
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