Geometrical instruments – Miscellaneous – Light direction
Patent
1982-03-15
1984-02-14
Little, Willis
Geometrical instruments
Miscellaneous
Light direction
33434, 33438, B43L 1300
Patent
active
044307977
ABSTRACT:
A plotting device is disclosed containing a traveling carriage drawing apparatus and distance measuring devices in the traveling carriages which emit a number of electrical pulses which are proportional to the displacement of the traveling carriages and which are weighted with an adjustable scale factor, to be measured as coordinate values (x, y) of a basic Cartesian basic coordinate system. The measured coordinate values are transmissible to and recordable by indicator units located within the area of a traveling carriage. The basic coordinate system possesses a selectable, stationary zero point and fixed axis directions in the traveling direction of the traveling carriages. In order for the user to obtain, through appropriate collection and processing of coordinate values which are actually being plotted, the information required in a form particularly suited for the preparation and dimensioning with respect to execution of the drawing, and which specifically is CAD-compatible as well, conversion means are provided which transform the measured coordinate values into the values of a desired different coordinate system. In addition, there is provided a control unit with selector button array to allow selection of the desired coordinate transformation and to transmit the measured or transformed coordinate values, as desired, to the indicator units.
REFERENCES:
patent: 4221056 (1980-09-01), Koenuma
Western Electric Technical Digest No. 16-Oct. 1969, pp. 13-14 "System for nverting Rectangular Coordinate Signals Into Polar . . . ".
Franz Kuhlmann Prazisionsmechanik and Maschinenbau GmbH & Co. KG
Little Willis
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