Telegraphy – Systems – Position coordinate determination for writing
Patent
1989-07-13
1991-01-15
Schreyer, Stafford D.
Telegraphy
Systems
Position coordinate determination for writing
108 9, 108 23, 362 97, G08C 2100
Patent
active
049856022
ABSTRACT:
A digitizer tablet is disclosed having a movable cover and a support which automatically stably holds the cover open when the cover is opened. The digitizer tablet comprises a base structure, a cover pivotably connected thereto and a support coupled to the cover and to the base structure for automatically holding the cover open when it has been pivoted to its open position. The support is constructed to self engage in the open position such that the application of a substantial force to the support is required to unlock it from the open position. Preferably, the support includes a spring resiliently urging the support to self engage in the open position. The support comprises a first support arm pivotally connected at one end to the cover and a second support arm pivotally connected at one end to the base structure, the first and second support arms each including an opposite end which are pivoted together. The cover is automatically held open once opened by the configuration of the arms and by a stop limiting pivoting of the first and second arms relative to each other to a predetermined angle.
REFERENCES:
patent: 4592285 (1986-06-01), Egli
patent: 4733485 (1988-03-01), Ozeki
Schreyer Stafford D.
Summagraphics Corporation
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