Academia.eduAcademia.edu

Figure 13 – uploaded by Md Prince

See full PDFdownloadDownload figure
g.1. The “light pen” uses a photocell or photomultiplier which sends a pulse to the computer whenever a dot is “seen” on the display. The tracking cross, a computer-programmed dot pattern, is continually repositioned by digital feedback techniques so that it stays centered within the field of view of the light pen. In this way, the operator specifies the endpoints of lines and other locations to the computer.

Figure 13 g.1. The “light pen” uses a photocell or photomultiplier which sends a pulse to the computer whenever a dot is “seen” on the display. The tracking cross, a computer-programmed dot pattern, is continually repositioned by digital feedback techniques so that it stays centered within the field of view of the light pen. In this way, the operator specifies the endpoints of lines and other locations to the computer.

Related Figures (21)

Fig. 1. The “light pen” uses a photocell or photomultiplier which sends a pulse to the computer whenever a dot is “‘seen” on the display. The tracking cross, a computer-programmed dot pattern, is continually repositioned by digital feedback techniques so that it stays centered within the field of view of the light pen. In this way, the operator specifies the endpoints of lines and other locations to the computer.
Fig. 1. The “light pen” uses a photocell or photomultiplier which sends a pulse to the computer whenever a dot is “‘seen” on the display. The tracking cross, a computer-programmed dot pattern, is continually repositioned by digital feedback techniques so that it stays centered within the field of view of the light pen. In this way, the operator specifies the endpoints of lines and other locations to the computer.
ig. 3. Tool path programming for numerical control. The inner circle represents the flat end of the cutter. (a) The cutter path, guided by the light pen, moves up to a position precisely tangent to the side of the part. (b) In an automatic mode, cutter moves around part, pausing at each point of tangency between lines and arcs which make up the part. (c) A larger cutter is called for and the cutter depth is changed. (d) Ina point-to-point mode, the cutter is moved back and forth in a swathing operation to mill down the top of the part.
ig. 3. Tool path programming for numerical control. The inner circle represents the flat end of the cutter. (a) The cutter path, guided by the light pen, moves up to a position precisely tangent to the side of the part. (b) In an automatic mode, cutter moves around part, pausing at each point of tangency between lines and arcs which make up the part. (c) A larger cutter is called for and the cutter depth is changed. (d) Ina point-to-point mode, the cutter is moved back and forth in a swathing operation to mill down the top of the part.
Fig. 2. Steps in drawing a part. (a) Circles are drawn, specifying centers and radii precisely by keyboard. (b) Tangents are drawn to sides of circles indicated by light pen. Also, lines are drawn through centers at precisely specified angles. (c) Lines are drawn tangent to circles and parallel to earlier lines. (d) Unneeded lines are erased, then circles are erased and replaced by arcs tangent to existing lines.
Fig. 2. Steps in drawing a part. (a) Circles are drawn, specifying centers and radii precisely by keyboard. (b) Tangents are drawn to sides of circles indicated by light pen. Also, lines are drawn through centers at precisely specified angles. (c) Lines are drawn tangent to circles and parallel to earlier lines. (d) Unneeded lines are erased, then circles are erased and replaced by arcs tangent to existing lines.
Fig. 4. In its first production application, computer-aided design is used to prepare a digital tape to drive a numerically controlled milling machine. The picture of the display was precisely copied from a drawing (not shown) using the typewriter, button box, and light pen. Finished part, shown on desk, is the rudder control pulley for a C-141 aircraft.
Fig. 4. In its first production application, computer-aided design is used to prepare a digital tape to drive a numerically controlled milling machine. The picture of the display was precisely copied from a drawing (not shown) using the typewriter, button box, and light pen. Finished part, shown on desk, is the rudder control pulley for a C-141 aircraft.
Fig. 7. Dynamics program for wing flutter studies uses graphical input and output. Stiffness and mass can be specified by light pen for each of 12 segments of cantilevered beam or wing. First six modes of vibration are then computed and displayed upon request, as shown here for mode number 3. Fig. 5. Structural analysis example computes shear (center) and bending moment (bottom) resulting from three uniform loads (top) along a cantilevered uniform beam rigidly attached at its left end. Magnitudes of loads are adjusted by light-pen-sensitive arrows at top, and lateral extent of loads by arrows at bottom.
Fig. 7. Dynamics program for wing flutter studies uses graphical input and output. Stiffness and mass can be specified by light pen for each of 12 segments of cantilevered beam or wing. First six modes of vibration are then computed and displayed upon request, as shown here for mode number 3. Fig. 5. Structural analysis example computes shear (center) and bending moment (bottom) resulting from three uniform loads (top) along a cantilevered uniform beam rigidly attached at its left end. Magnitudes of loads are adjusted by light-pen-sensitive arrows at top, and lateral extent of loads by arrows at bottom.
Fig. 8. Cross section of a beam is drawn with light pen. Center of gravity, area, and inertia moments are immediately computed and printed. The center of gravity axes are also displayed.
Fig. 8. Cross section of a beam is drawn with light pen. Center of gravity, area, and inertia moments are immediately computed and printed. The center of gravity axes are also displayed.
Fig. 6. Budget estimates (hours/month) are rapidly entered into the form by light pen. Vertical totals, horizontal totals, and cross total immedi- ately appear. When numbers are changed, totals are automatically up- dated.
Fig. 6. Budget estimates (hours/month) are rapidly entered into the form by light pen. Vertical totals, horizontal totals, and cross total immedi- ately appear. When numbers are changed, totals are automatically up- dated.
Fig. 9. Fuselage design by curve shaping. (a) Circle, within frame, is presented to designer. (b) Wheel outlines are called up from storage. Designer then uses knobs and buttons (not shown) to shape outline into canopy and wheel fairings.
Fig. 9. Fuselage design by curve shaping. (a) Circle, within frame, is presented to designer. (b) Wheel outlines are called up from storage. Designer then uses knobs and buttons (not shown) to shape outline into canopy and wheel fairings.
Fig. 11. Aircraft windshield is drawn in three dimensions (upper right— top view, lower right—side view, lower left—front view, upper left— perspective). Windshield can then be rotated and looked at from any angle. Visibility studies are possible by drawing rays from pilot’s eye positions through corner points.
Fig. 11. Aircraft windshield is drawn in three dimensions (upper right— top view, lower right—side view, lower left—front view, upper left— perspective). Windshield can then be rotated and looked at from any angle. Visibility studies are possible by drawing rays from pilot’s eye positions through corner points.
"ig. 10. Abstract data from NASA digital tapes are called up by key- word and displayed. An empty ‘‘box” or record is at bottom of screen. Labels on right are light pen commands such as “print,” “move,” “open,” and “type.” Using these “buttons,” the text can be manip- ulated as desired.
"ig. 10. Abstract data from NASA digital tapes are called up by key- word and displayed. An empty ‘‘box” or record is at bottom of screen. Labels on right are light pen commands such as “print,” “move,” “open,” and “type.” Using these “buttons,” the text can be manip- ulated as desired.
Fig. 12. Three consoles are time-shared on a CDC-3300 computer to produce numerical control tapes for C-5A aircraft parts.
Fig. 12. Three consoles are time-shared on a CDC-3300 computer to produce numerical control tapes for C-5A aircraft parts.
Pig. %. in its first production application, Computer-aided design is used to prepare a digital tape to drive a numerically controlled milling machine. The picture of the display was precisely copied from a drawing (not shown) using the typewriter, button box, and light pen. Finished part, shown on desk, is the rudder control pulley for a C-141 aircraft.
Pig. %. in its first production application, Computer-aided design is used to prepare a digital tape to drive a numerically controlled milling machine. The picture of the display was precisely copied from a drawing (not shown) using the typewriter, button box, and light pen. Finished part, shown on desk, is the rudder control pulley for a C-141 aircraft.
‘ig. 7. Dynamics program for wing flutter studies uses graphical inp and output. Stiffness and mass can be specified by light pen for each ¢ 12 segments of cantilevered beam or wing. First six modes of vibratio are then computed and displayed upon request, as shown here for moc number 3. ig. 5. Structural analysis example computes shear (center) and bendins moment (bottom) resulting from three uniform loads (top) along < cantilevered uniform beam rigidly attached at its left end. Magnitude: of loads are adjusted by light-pen-sensitive arrows at top, and latera extent of loads by arrows at bottom.
‘ig. 7. Dynamics program for wing flutter studies uses graphical inp and output. Stiffness and mass can be specified by light pen for each ¢ 12 segments of cantilevered beam or wing. First six modes of vibratio are then computed and displayed upon request, as shown here for moc number 3. ig. 5. Structural analysis example computes shear (center) and bendins moment (bottom) resulting from three uniform loads (top) along < cantilevered uniform beam rigidly attached at its left end. Magnitude: of loads are adjusted by light-pen-sensitive arrows at top, and latera extent of loads by arrows at bottom.
‘ig. 6. Budget estimates (hours/month) are rapidly entered into the form by light pen. Vertical totals, horizontal totals, and cross total immedi- ately appear. When numbers are changed, totals are automatically up- dated.
‘ig. 6. Budget estimates (hours/month) are rapidly entered into the form by light pen. Vertical totals, horizontal totals, and cross total immedi- ately appear. When numbers are changed, totals are automatically up- dated.
Fig. 9. Fuselage design by curve shaping. (a) Circle, within frame, is presented to designer. (b) Wheel outlines are called up from storage. Designer then uses knobs and buttons (not shown) to shape outline into canopy and wheel fairings.
Fig. 9. Fuselage design by curve shaping. (a) Circle, within frame, is presented to designer. (b) Wheel outlines are called up from storage. Designer then uses knobs and buttons (not shown) to shape outline into canopy and wheel fairings.
‘ig. 11. Aircraft windshield is drawn in three dimensions (upper right— top view, lower right—side view, lower left—front view, upper left— perspective). Windshield can then be rotated and looked at from am angle. Visibility studies are possible by drawing rays from pilot’s ey positions through corner points.
‘ig. 11. Aircraft windshield is drawn in three dimensions (upper right— top view, lower right—side view, lower left—front view, upper left— perspective). Windshield can then be rotated and looked at from am angle. Visibility studies are possible by drawing rays from pilot’s ey positions through corner points.
Fig. 12. Three consoles are time-shared on a CDC-3300 computer to produce numerical control tapes for C-SA aircraft parts.
Fig. 12. Three consoles are time-shared on a CDC-3300 computer to produce numerical control tapes for C-SA aircraft parts.
Fig. 10. Abstract data from NASA digital tapes are called up by key- word and displayed. An empty “box” or record is at bottom of screen. Labels on right are light pen commands such as “print,” “move,” “open,” and “type.” Using these “buttons,” the text can be manip- ulated as desired.
Fig. 10. Abstract data from NASA digital tapes are called up by key- word and displayed. An empty “box” or record is at bottom of screen. Labels on right are light pen commands such as “print,” “move,” “open,” and “type.” Using these “buttons,” the text can be manip- ulated as desired.
Related topics:
Computer ScienceComputer GraphicsBiomedical EngineeringNumerical ControlElectrical and Electronic Engineering
580 California St., Suite 400
San Francisco, CA, 94104
© 2025 Academia. All rights reserved