Knobber : March 18, 2008

Knobber
Image Data
File Name: 20D_17549
Model: Canon EOS 20D
Lens: Canon EF 100mm F/2.8 USM Macro
Date: 03.17.08 11:22pm
Focal Length: 100mm (160mm)
Shutter: 1/250 s
F-Stop: F2.8
ISO: 200
Program: Manual
Metering Mode: Evaluative
Flash: On
Flash Bias: +1.33 EV
Flash Details: External flash, E-TTL
Focus Mode: One shot AF

Knobber

Comments: 0   Views: 438   Like/Fave (37)   Kitchen
03.18.2008
« Previous | Next »

The basic principles of the pin tumbler lock (the type mechanism used in the cylinder locks of keyed doors) may date as far back as 2000 BC in Egypt.

In this type of lock, an outer casing has a cylindrical hole in which the plug is housed. To open the lock, the plug must rotate. The plug contains a series (usually 5 or 6) of pins that are split at different heights and held in place by springs. The pins prevent the plug from rotating. When the proper key is inserted into the lock, the notches ground into the key align all the breaks in the pins to the same level, aligning at the shear point to allowing the plug to turn and unlock.

Unfortunately, this type of lock is easily prone to picking or bumping. So just like most locks, they really only keep an honest person out. Locks mostly give a false sense of security. If somebody really wants in, they'll get in, and probably easier than you think.

Comments (0)

Leave a Comment






What is 4+4?
Please type the answer to this simple math question
to ensure you are a human & not a robot spammer.

Image Info
Histogram
Lens
Map
Location Map

 Recent Photos 

Blown Away
January 31, 2015
Turbo Booster
January 30, 2015
Boost Her
January 29, 2015
Her Dull
January 28, 2015
Toreador
January 27, 2015

Photos By Date

.:: View All ::.
updragdown

Last Commented

Stairbomination
  02.09.2015 10:06am
It Takes Guts
  02.04.2014 9:37am
Bitty Fi
  09.15.2013 7:43pm
The Incident
  08.02.2013 9:05pm
Dollar
  07.31.2013 8:47pm

Last Viewed

Browse by Tags

abstract abstrat animals architecture b&w beer clouds eyes fire flood flower flowers food football funny ice instrument landscape macro maui mirror model mountain mountains music night people plant plants reflect shadow silverware sky smoke snow sports still-life stop-motion symmetry tools transportation water wedding

Statistics

Total Images: 2588
Total Comments: 1476
Last Image:
January 31, 2015

Facebook Twitter RSS FeedSubscribe

Photoblogs
Photoblog Community
Cool Photoblogs
Photoblogs Review