1. Classes of Communication Technology
IOT POLY ENGINEERING
2-4
Classes of Communication Technology
DEFINITIONS:
Print Graphic Communication
Visual, lingual messages that include printed media
Photographic Communication
Using photographs, slides, or motion pictures to communicate a message
Telecommunications
Communicating over a distance
Technical Graphic Communication
Specific information about a product or its parts
Size and shape, how to install, adjust, operate, maintain, or assemble a device

2. Classes of Communication Technology
IOT POLY ENGINEERING
2-4
Classes of Communication Technology
EXAMPLES:
Print Graphic Communication
Newspaper, poster, brochure, billboard
Photographic Communication
Photographs, slides, motion pictures
Telecommunication
Radio and t.v. broadcasts, computers, mobile and satellite
Technical Graphic Communication
Engineering drawings (sketches, drafting, CAD)

3. Matching Classes 2-4 Print Graphic Communication
IOT POLY ENGINEERING
2-4
Matching Classes
Print Graphic Communication
Photographic Communication
Telecommunications
Technical Graphic Communication 3 1
2,3 2
Telephone Headphones
Book Computer
Videotape Remote Control
DVD Painting
Magazine Camera
Photograph Comic Strip
Newspaper Billboard 3 2
1,2

4. Communication Technology
IOT POLY ENGINEERING
2-4
Communication Technology
Major Processes:
Relief
A modeled work that is raised (or lowered) from a flat background.
Cuneiform by the Sumerians ~6000 years ago.
Wood block printing ~200 C.E.
Movable type printing ~1040 C.E. (Gutenberg ~1450)
Intaglio (in-tal-yo) ~1430
Rotary printing press ~1843
Lithography (offset printing) ~1796
The source and destination are not on raised surfaces
Grease and water do not readily mix
A chemical process
Most modern books and newspapers
Intaglio
(in-tal-yo)
2. The plate is covered in ink
By 593 A.D., the first printing press was invented in China, and the first printed newspaper was available in Beijing in 700 A.D. It was a woodblock printing. And the Diamond Sutra, the earliest known complete woodblock printed book with illustrations was printed in China in 868 A.D. And Chinese printer Bi Sheng invented movable type in 1041 A.D. in China.
3. Excess ink is removed from surface
1. Depressions cut into printing plate
Print Graphic Communication
4. Paper placed on plate and compressed
5. Paper is removed and ink has been transferred
Low Relief
Cuneiform
High Relief

5. Communication Technology
IOT POLY ENGINEERING
2-4
Communication Technology
Screen Printing (~1000 C.E., China; 1907 England)
Mainly billboards, package labels, fabric designs
Uses a woven mesh (a screen) to support an ink blocking stencil.
The stencil forms open areas of mesh that transfer ink as a sharp-edged image onto a substrate.
A roller or squeegee is moved across the screen stencil forcing or pumping ink past the threads of the woven mesh in the open areas.
Electrostatic (1938 / 1960s)
Photocopier, Laser Printer
Opposite charges attract
Ink Jet (1980s)
Use a series of nozzles to spray ink directly on paper
Print Graphic Communication

6. Communication Technology
IOT POLY ENGINEERING
2-4
Communication Technology
Photographic Communication
The process of using photographs to communicate a message
Photography – capturing light on a light-sensitive material such as film or electronic sensor
As a usable process, 1820s
Includes photographs, slides, and motion pictures
Photographic Communication

7. Communication Technology
IOT POLY ENGINEERING
2-4
Communication Technology
Telecommunication
Communicating over a distance
Tele – Greek, “far off” Communicare – Latin, “to share”
Rely on the principles of electricity and magnetism
2 types:
Hardwired systems (telephone, cable, fiber-optic)
Broadcast systems (radio and t.v., mobile phones)
Point-to-point:
One transmitter and one receiver
Broadcast:
One powerful transmitter to numerous receivers
Telecommunications

8. Communication Technology
IOT POLY ENGINEERING
2-4
Communication Technology
Smoke signals and drums
Chains of beacons (Middle Ages)
Navigation signals
Enemy troops approaching
Homing pigeons
Carrier pigeons used as early as 1150 in Baghdad
Olympic victors, Greece; Stock options, Europe
Optical telegraph (semaphore, 1792, France)
Towers with pivoting shutters
Information encoded by the position of the mechanical elements
Telecommunications

9. Communication Technology
IOT POLY ENGINEERING
2-4
Communication Technology
Telegraph (mid 1830s)
First instrument used to send messages by means of wires and electric current
A device interrupts the flow of a current through a wire
Uses shorter and longer bursts of current to represent letters
Device at receiving end converted electrical signal into clicks
Operator/mechanical printer converted clicks into words
Telegram – wires over land
Cable – wires under water
Telephone (1876 – Bell and Gray)
Greek: tele – far, phone – sound
Telecommunications

10. IOT POLY ENGINEERING
2-4
Play Morse Code Video
Telecommunications

11. Communication Technology
IOT POLY ENGINEERING
2-4
Communication Technology
Broadcast
Radio (1893 – Tesla, 1901 – Marconi)
Television (1925)
Greek: tele – far, Latin: visio – seeing
4 main parts (cathode ray tube)
Electron gun fires 3 beams
Steering coils move electron beam across screen
Phosphorus screen has over 200,000 pixels
Glass tube holds it all together
Signals are broadcasted like radio signals
Telecommunications

12. Communication Technology
IOT POLY ENGINEERING
2-4
Communication Technology
Computers
Internet
Cellular
Local Area Networks
Satellite Communication
Telecommunications

13. Communication Technology
IOT POLY ENGINEERING
2-4
Communication Technology
Engineering Drawing / Technical Illustration
Communicates specific information
Size and shape
How parts are assembled
How to install, operate, adjust, maintain a device
Hand methods
Sketching
Drafting
Computer methods
CAD (AutoCAD, Sketchup, Inventor, ProEngineer, etc.)
Technical Graphic Communication