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    • 1. 发明授权
    • Keyboards
    • 键盘
    • US3831730A
    • 1974-08-27
    • US32823973
    • 1973-01-31
    • KOEPPE D
    • KOEPPE D
    • B41J5/08B41J5/26
    • B41J5/26
    • Keys of a typewriter or similar machine embodying a keyboard are returned to their elevated inactive positions by a force greater than the force utilized to support the keys in their elevated positions. The increased return force may be derived from the operation of electromagnetic means. The invention causes the fingers of the keyboard operator to ''''bounce'''' to an advantageous position above the keyboard where they are poised for a more rapid and efficient continuing keyboard operation.
    • 键盘的打字机或类似机器的键通过大于用于将键支撑在升高位置的力返回到升高的非活动位置。 增加的返回力可以来自电磁装置的操作。 本发明使得键盘操作者的手指“弹跳”到键盘上方的有利位置,在那里它们被准备好以进行更快速和有效的连续键盘操作。
    • 10. 发明授权
    • Key arm mechanism
    • 钥匙臂机构
    • US3974905A
    • 1976-08-17
    • US508484
    • 1974-09-23
    • Wendell C. Johnson
    • Wendell C. Johnson
    • B41J5/26B41J7/92
    • B41J5/26
    • A key arm mechanism for keys of a typewriter or data entry device in which a uniform spring rate is achieved by varying the cross-sectional area of the key arms as a direct relation to the distance of the key support posts from a cantilever point. The entire key arm mechanism is formed of a unitary molded material. In one embodiment, the cross-sectional area of each key arm is uniform from the cantilever point to its associated key support post. In another embodiment, the cross-sectional area of each key arm decreases linearly from the cantilever point to its associated key support post. Uniform initial preload tension can be applied to the key arms by a slotted member which engages the ends of the key arms remote from the cantilever points. Non-uniform preload tension can be achieved by varying the height of some slots of the slotted member or by varying the height of the key arms at the ends thereof remote from the cantilever points. Adjustment of the preload tension can be achieved by an eccentric positioned adjacent the cantilever points.
    • 一种用于打字机或数据输入装置的键的键臂机构,其中通过改变键臂的横截面积与键支撑柱与悬臂点的距离的直接关系来实现均匀的弹簧刚度。 整个键臂机构由整体成型材料形成。 在一个实施例中,每个键臂的横截面积从悬臂点到其相关联的键支撑柱是均匀的。 在另一个实施例中,每个键臂的横截面积从悬臂点线性减小到其相关的键支撑柱。 可以通过与远离悬臂点的键臂的端部接合的开槽构件将键均匀地施加到键臂上。 可以通过改变开槽构件的一些槽的高度或者通过改变在远离悬臂点的端部处的键臂的高度来实现不均匀的预载张力。 预紧力的调节可以通过邻近悬臂点定位的偏心件来实现。