Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1973-07-09
1976-02-03
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
318576, 318577, 318628, G05b 1942
Patent
active
039367126
ABSTRACT:
An interactive graphics system in which plotting, digitizing and other related capabilities are performed is described in which complex graphics may be generated, edited and developed at a plurality of terminals, independently, with a minimum of hardware and in which precision control of the motion of a plotting table at each location is achieved in response to simplified input commands. Additionally, a novel floating cursor is described by which an operator may control the motion of the carriages of a plotting table or other positioning system actuated during plotting on the table, and digitize various coordinate locations with corresponding storage in a central computer of such locations, all by manually positioning the cursor at the desired locations. The floating cursor is connected with an energy sensor and both the cursor and the sensor are mechanically movable relative to or independently of the carriage. An energy generator is fixedly connected to the carriage and is directed toward the sensor so that relative movement of the cursor and carriage can be detected by the sensor. The carriage is then made to move with the cursor in response to signals generated from the energy sensor. Thus, the cursor floats with respect to the carriage, which precisely follows the cursor over a plotting surface and which carriage contains various devices for drafting or other operations on material located on the plotting surface.
REFERENCES:
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patent: 3398452 (1968-08-01), Little
patent: 3693066 (1972-09-01), Friedman et al.
patent: 3725760 (1973-04-01), Bailey
patent: 3727119 (1973-04-01), Stanley et al.
patent: 3750186 (1973-07-01), Sakamoto
patent: 3774098 (1973-11-01), Moss
Gerber Heinz Joseph
Logan David J.
Rich Leonard G.
Dobeck B.
The Gerber Scientific Instrument Company
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