THE TELEPHONE (ALEXANDER GRAHAM BELL)

THE TELEPHONE
            (ALEXANDER GRAHAM BELL)

Problem Solved (Purpose)
 To improve the telegraph and help the hearing impaired
Resources/How it worked
 Several sounds are sent along the same wire if the sounds/signals
  dif fer in pitch
 a device that would transmit speech electrically
 a working transmitter with a membrane capable of var ying
  electronic currents and a receiver that would reproduce these
  variations in audible frequencies
Changes Lives
 Greater mobility and communication; quicker responses to
  emergencies; faster business connections
Extend Abilities
 Able to talk over long distances and hear a response immediately
Role of Technology Today vs. prior to 1950
 In 1950 it was the only way to communicate per son to person in
  real time and it’s main use was communication. In modern day the
  cell phone is used for communication, enter tainment, information
  and more. It also allows people to communicate through written
  messages in real time.

THE HYDROFOIL
(ALEXANDER GRAHAM BELL, CASEY BALDWIN)
Problem Solved (Purpose)
 It was invented as a possible aid to airplane takeoff from
  water. It also was meant to help things heavier than water
  float so it could go faster
Resources/How it worked
 It uses wing-like structure mounted on struts below the hull of
  a boat, which lifts the boat partially out of the water during
  forward motion, in order to reduce drag.
Changes Lives
 People can get places faster when traveling over water.
Extend Abilities
 Enabled people to have faster water travel.
Role of Technology Today vs. prior to 1950
 Today ships use this technology to move much faster. It is
  used mostly for fast passenger ships, but it is also used by
  the military.

THE METAL DETECTOR
          (ALEXANDER GRAHAM BELL)
Problem Solved (Purpose)
 The device was quickly put together in an attempt to
  find the bullet in the body of U.S. President James
  Garfield
Resources/How it worked
 It failed to work because the bed’s coil springs would
  confused the detector
Changes Lives
 did not find the assassin's bullet partly because the
  metal bed frame on which the President was lying
  disturbed the instrument, resulting in static
Extend Abilities
 It finds valuable ores that people otherwise couldn’t
  find. It also helps find metal in food products.

PHONOGRAPH/GRAMOPHONE
         (ALEXANDER GRAHAM BELL)
Problem Solved (Purpose)
 It was invented to record the sounds, and people
  can listen to the sounds repeat again.
Resources/How it worked
 It works records on a wax disc.
Changes Lives
 Now, few people who likes it still use it, and
  collecting them. However, it changed to a recorder.
Extend Abilities
 People were able to listen to recorded sounds.
Role of Technology Today vs. prior to 1950
 A tape recorder started as a phonograph.

THE VACUUM JACKET
           (ALEXANDER GRAHAM BELL)

Problem Solved (Purpose)
 to help people with respiratory problems (e.g. polio)
  breathe
Resources/How it worked
 It was an airtight iron cylinder which fitted closely
  around the torso. Once strapped into the cylinder, a
  suction pump forced air in and out of the “iron lung”
  stimulating the patient’s own lungs.
Changes Lives
 it helped out people with breathing difficulties and also
  helped people live longer.
Extend Abilities
 it helped people with polio/respiratory problems live a
  longer life.
Role of Technology Today vs. prior to 1950
 today, we have oxygen masks or defibrillators to help
  breathing instead of a vacuum jacket.

THE PHOTOPHONE
          (ALEXANDER GRAHAM BELL)
Problem Solved (Purpose)
 Bell had hoped his new invention could be used by ships at sea
  and to displace the excess of telephone lines that were
  booming along busy city streets.
Resources/How it worked
 It allowed for the transmission of both articulated sounds and
  national human conversations on a beam of light.
Changes Lives
 It wasn’t successful over long distances but it did get people to
  think about using light to communicate. His designs failed to
  protect its transmissions from outdoor interferences such as
  clouds, fog, rain, snow and such that could easily disrupt the
  transmission of light
Extend Abilities
 It was used to help hearing abilities. It was intended to be used
  to communicate at sea and to reduce the many telephone
  wires.
Role of Technology Today vs. prior to 1950
 We do use this method, but in a different way. It is used in fiber
  optic network communication. Wireless communication is
  easier today.

THE AIRPLANE, SILVER DART
            (ALEXANDER GRAHAM BELL)
Problem Solved (Purpose)
 Bell wanted to invent the first controlled powered airplane in
  the British Empire. He wanted something that would go
  farther than other planes.
Resources/How it worked
 It was made of bamboo, with steel tube ferrules, friction
  tape binding, Japanese silk and wood. The wing struts were
  hewn from spree the individual wings were made of ash. It
  also had a 35hp V8 engine. It had had poor control and no
  brakes.
Changes Lives
 More transportation, further and faster.
Extend Abilities
 People were able to travel further than other planes also can
  carry other passengers.
Role of Technology Today vs. prior to 1950
 Planes are dif ferent today because you can fit more
  passengers, more built stronger, more protection, more big.
  Fly more longer, and travel further.

KEROSENE
                  (ABRAHAM GESNER)
Problem Solved (Purpose)
 It burned cleaner and was less expensive than competing
  products, such as whale oil.
Resources/How it worked
 He made it by refining a liquid fuel from coal.
Changes Lives
 It changed our lives for the better because it was a good
  clean burning multipurpose fuel and saved the poor whales.
  Street lights installed in Halifax and other cities made is
  brighter and safer at night.
Extend Abilities
 Able to see easier at night in cities
Role of Technology Today vs. prior to 1950
 Our jets are fueled and our tiki torches are lit.
 We use jets nowadays. And tiki torches. They probably didn’t.
 We use electricity for lights today.

DUMP TRUCK
            (ROBERT T. MAWHINNEY)
Problem Solved (Purpose)
 To carry very heavy things long distances.
Resources/How it worked
 Dump box attached to a flatbed truck and attached
  it to a wrench to make it lift up and go down.
Changes Lives
 It can carry heavy things long distances that
  humans can’t.
Extend Abilities
 More heavy things get carried long distances.
Role of Technology Today vs. prior to 1950
 The dump trucks today are way bigger than before
  because they use hydraulics.