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Welcome to 'Security'- learn about the world of locks and Security


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Security Locks

 

Security Without Keys

  • Always loosing your keys? 
  • Do you employ a number of staff who all have keys? 
  • Do you feel at risk if any key holder leaves your employ?
  • Do you have a secure area where sensitive material is kept? 

If you answer 'yes' to these and similar questions, you need a digital lock.

Though there are many types on the market, digital locks fall into two basic categories, mechanical and electrical.
The mechanical and electrical digital locks are keyless locks that operate via a keypad.  Keying in numbers and sometimes letters enables the lock to function.  The difference between them being, that the mechanical version is as the name suggests, a mechanical device which works by mechanical means, where as some electronic digital locks operate wholly electrically but others produces a mechanical response.


Mechanical Digital Locks
  
Digital locks will only allow the lock to operate and allow entry by inserting the correct access code, without it, the lock handle or turning knob is restricted from turning fully, alternatively, the handle, or turning knob 'slips' by means of a clutch system.  Whichever system used, the end result is the same, the locking latch or bolt that holds the door in the locked position will not move.The first featured is the 'Push Button' type, a very popular device used in many homes and offices and different types of workplaces. The lock itself comes in two parts, the Lock Case which houses the buttons and contains the bulk of the mechanism of the lock and the Back Plate which is fitted onto the inside of the door and has a thumb turn or
knob for opening from the inside.  When the lock is fitted, the door is sandwiched between these two parts and are drawn together by the fixing bolts which are tightened from the inside. The mortice dead latch which is fitted into the edge of the door, works in conjunction with these two parts. Behind each button is concealed a tumbler which has either a red or blue coloured tip, which can be seen through the holes in the back cover plate. The red tumblers represent the opening code and the blue the none opening. If the access code was 1234Y, the red tumblers would be behind those five buttons.  The blue tumblers, would be located behind the remaining non opening buttons. All the tumblers have notches cut out of one edge, the position of which is determined by the tumbler colour, other than this, all the tumblers are the same shape.

 

 

When aligned, these notches provide a pathway within the lock's mechanism,  allowing movement to take place.  There is also a 'C' button that stands for 'Clear', this resets all the spring loaded buttons and tumblers, so that when pressed, makes the lock ready for use.  In this mode, all the blue coloured tumblers are set so that there is a clear pathway via their notches, where as the red tumbler are all positioned so that they restrict the path. When buttons 1234Y are pressed, the corresponding red tumblers are moved from the restricted position to a position where the notches, like the blue tumblers, provide a clear path.  With all the red and blue tumbler notches aligned, the outside knob will turn, so by releasing the locking latch, allowing the door to open.


 

 

 

 

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