Coded data generation or conversion – Bodily actuated code generator – Including keyboard or keypad
Patent
1989-03-14
1991-08-06
Weldon, Ulysses
Coded data generation or conversion
Bodily actuated code generator
Including keyboard or keypad
178 18, 340706, H03K 1794
Patent
active
050381423
ABSTRACT:
A touch sensing direct input data display device is described. The data display screen is directly and solely supported within a housing by stiff springs having essentially uniaxial freedom of motion. Strain gauge sensors are applied directly to the springs and are connected in a full Wheatstone bridge sensing circuit. The outputs of the sensors are fed to a calculating and processing device for calculaating the X, Y and Z coordinate information relative to the point on the face of the display which has been pushed or touched. The Z component is of total force and the X any Y components give the two dimensional location for the application of the force measured in the Z axis. The stiff springs allow very little deflection to occur under normal touch imposed fores on the display screen. They permit essentially uniaxial motion only in the Z axis. The system is mechanically robust and may be shipped and subjected to dropping or impact loads normally encountered in shipping without damage, has a relatively high natural frequency of vibration and produces high level, relatively continuous output signals for use.
REFERENCES:
patent: 4550384 (1985-10-01), Kimura
patent: 4558757 (1985-12-01), Mori et al.
patent: 4675569 (1987-06-01), Bowman et al.
patent: 4800973 (1989-01-01), Angel
"Tap Screen Mounting System"; IBM Tech. Dislc. Bulletin, vol. 28, No. 4, Sep. 1985.
Flower Dale R.
Gallarelli Pat
Goffinet Kevin P.
Miles Anthony W.
Rudisill Charles A.
Dufield Edward H.
International Business Machines - Corporation
Weldon Ulysses
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