technology of a toaster_class presentation
TRANSCRIPT
![Page 1: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/1.jpg)
Judith Lievens
![Page 2: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/2.jpg)
HISTORY
![Page 3: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/3.jpg)
History• Why ?
• Electricity in America
• 1900 Embedded heating
• 1905 Nichrome (Albert Marsh)
• 1909 First electric toaster (Frank Shailor for
General Electrics)
• 1913 Toaster with automatic turner (Lloyd
Copeman)
• 1919 Automatic pop-up (Charles Strite)
•1933 Spring loaded automatic toaster in
households
• 1960’s Common and cheap
• 1980’ … now
![Page 4: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/4.jpg)
PARTS
![Page 5: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/5.jpg)
Parts Shell
![Page 6: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/6.jpg)
Parts Shell - Handle
![Page 7: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/7.jpg)
Parts Shell – Switch&Options
![Page 8: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/8.jpg)
Parts Shell - Slots
![Page 9: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/9.jpg)
Parts Bottom
![Page 10: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/10.jpg)
Parts Crumb Tray
![Page 11: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/11.jpg)
Parts Inside
Lever
Plastic tab
Contacts
Metal tab
Electromagnet
Springs
Selfpositioning slot
PCB
![Page 12: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/12.jpg)
SO WHAT HAPPENS WHEN I TOAST MY SLICE OF BREAD?
![Page 13: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/13.jpg)
So what happens…1. Plug in the toaster
2. Turn the switch
3. Optionally pick ‘bagel’, ‘defrost’ or ‘reheat’
4. Place your slices of bread
5. Push the tray down with the handle
6. Wait or push ‘stop’
7. Take out your bread
8. Empty crumb tray
9. Pull out the plug
10. Eat it!
![Page 14: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/14.jpg)
So what happens… When you turn the
switch?
Variable resistor
![Page 15: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/15.jpg)
So what happens… Pick an extra option?
Extra resistors
LED
![Page 16: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/16.jpg)
So what happens… When I push down?
![Page 17: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/17.jpg)
So what happens…Contacts close – lubicant – electrical circuit
When I push down?
![Page 18: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/18.jpg)
So what happens…Nichrome wires start toasting
When I push down?
![Page 19: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/19.jpg)
So what happens…Electromagnet – metal tab
When I push down?
![Page 20: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/20.jpg)
So what happens…Selfpositioning slot
When I push down?
![Page 21: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/21.jpg)
So what happens…Selfpositioning slot
When I push down?
![Page 22: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/22.jpg)
So what happens…Spring 1: stretches Spring 2: moves
down
When I push down?
![Page 23: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/23.jpg)
So what happens…
Capacitor charges
through resistor
= timer
When I wait?
![Page 24: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/24.jpg)
So what happens…Electromagnet is cut off and lets go
When I wait?
![Page 25: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/25.jpg)
So what happens…Spring 1: relaxes Spring 2: stops
components
When I wait?
![Page 26: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/26.jpg)
So what happens…Plastic tab – pulled upwards – contacts broken
When I wait?
![Page 27: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/27.jpg)
So what happens…Power to
nichrome wires
cut off
When I wait?
![Page 28: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/28.jpg)
So what happens…Selfpositioning slot
When I wait?
![Page 29: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/29.jpg)
So what happens…Selfpositioning slot
When I wait?
![Page 30: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/30.jpg)
So what happens…Normal Closed
↓
Power is cut off
Electromagnet releases tray
Springs relaxes and pulls up the tray with toast
Contact for nichrome wiresis broken
…
When I push ‘stop’?
![Page 31: Technology of a toaster_class presentation](https://reader033.vdocuments.us/reader033/viewer/2022060200/55996ec01a28ab7b368b46c9/html5/thumbnails/31.jpg)
So what happens… When I eat my toast?