Eric C Silverberg, 813102 Gentry Dr, Austin, TX 78746

4682091, Jul 21, 1987

Oct 15, 1985

6/787748

John J. Krewalk - West Lake Village CA
Eric C. Silverberg - Austin TX

Bausch & Lomb Incorporated - Rochester NY

G05B 1940

318685

A telescope control system is set forth for controlling the orientation of a telescope under control of a microprocessor. The telescope control includes drives to pivot the telescope about each of the declination (altitude) and right ascension (azimuth) axes in stepped increments, each increment corresponding to a control pulse. The microprocessor generates and issues the control pulses from stored data to position the telescope for viewing a selected celestial object. Control pulses are based upon and counted from an index position and/or the preceding position of the telescope. Manual override is provided, the microprocessor accounting for pulses generated during manual override.

4734716, Mar 29, 1988

Oct 30, 1986

6/925067

Eric Silverberg - Austin TX
James A. Parnell - Austin TX
Marvin L. Freeman - Round Rock TX
Robert A. Johnson - Georgetown TX

Ametek, Inc. - Austin TX

G01D 1524

346136

A plotter having the capability of unattended operation incorporates several innovations. An X-axis dual motor drive mechanism moves the plotting chart through the plotter using two independently controlled motors driving respective individual friction drives at either side of the chart. An automatic chart alignment mechanism aligns the chart with the plotter X-axis using the X-axis dual motor drive for swiveling of the chart as necessary and a sensor to detect and correct the position of the chart. A chart cutting mechanism allows chart stock supplied in roll form to be cut to a desired length for a plot using a knife assembly carried by the pen carriage like a pen. A cut chart handling mechanism enables cut charts to be retrieved and neatly stored.