Locksmiths in Alphington offer a highly demanded service, which generally relates to maintaining and installing the various types of lock systems, from the standard key locks to the complex electronic or biometric locks. The most common types of locksmith professions consist of the emergency, industrial, commercial, and residential, which each of the specific fields requiring different skills and abilities.
Residential work is likely to be the most common of the services provided by a residential locksmith. A domestic property owner looks at personal security and safety as a key reason when it comes to making sure a home is fully secured against a would-be intruder. A locksmith has gained the experience and knowledge to suggest the most effective locks for a properties doors and windows. Beyond the ability to install new locking systems, the locksmith is also able to repair or replace the locks on the older styled properties. Extra services offered by a local locksmiths offer security advice, a key cutting service, installing locks on a garage or similar outbuilding, and installing at-home safes or vaults.
How Do I Choose A Residential Locksmith in Alphington?Electromagnetic LocksElectromagnetic locks are widely used in commercial and industrial applications. The lock is usually mounted on the header above the door and the armature is usually mounted on the door (see drawing below). Different arrangements can be made for inswing or outswing doors, and different holding forces, monitoring switches, and other variations and options are available. In this article I will discuss only the basics. As with any locking system, use of electromagnetic locks may be restricted by local authorities such as your local building inspector and/or fire marshall. It is wise to check with these authorities before installing an electromagnetic lock. System OverviewTo install the most basic electromagnetic locking system on an out-swinging hollow metal commercial door and frame you need the following: The electromagnetic lockA way inA way outA power supply The electromagnetic lock is an appliance. It unlocks when you shut off the power. Therefore the means of entry and egress will be swtiches of some form or other. Means of entry could be: A key switchAn access control device like a card reader or keypad A remote as for a garage door openerYour choices for means of egress are limited by national, state and local life safety code. They could be: A mechanical push bar with a mechanical switch insideA pushbutton with pneumatic time delay clearly marked "Push to Exit" right next to the doorAn exit sensor with redundant pushbutton Your local Authority Having Jurisdiction (AHJ) may require that your power supply be connected to the building fire alarm so that in the event of an alarm, the panel can unlock the electromagnet. In any case you need a power supply with sufficient capacity to power your electromagnet. System ExamplesA simple electromagnetic locking system using products by Schlage Electronics might include: 1 each M490 electromagnetic lock 1 each PS902 power supply 1 each 653-05 key switch 1 each 621RD EX DA exit pushbutton A simple electromagnetic locking system by Securitron might consist of: 1 each M62 electromagnetic lock 1 each BPS-24-1 power supply 1 each DK-26SS keypad 1 each XMS exit sensor 1 each EEB2 redundant exit pushbutton Wiring the Electromagnetic Locking SystemIn the simple diagram above, you can see that the electricity travels in an unbroken loop. It starts at the "+" (positive) terminal of the power supply, travels through the exit and entry switches, into the positive terminal of the magnetic lock, and out through the negative (-) terminal of the mag back in through the negative terminal of the power supply. Because the loop in unbroken, we know the magnet is locked. If the loop is broken anywhere along the line, the magnet will be unlocked. When either of the switches is activated it breaks the loop and deprives the magnet of power, leaving it unlocked. NOTE: ALWAYS turn the magnet on and off via the positive terminal. Using the negative terminal could cause residual magnetism, a situation where the magnet does not immediately release when powered down. The exit switch could be a palm button, touch bar or motion sensor. The entry switch could be a key switch, keypad or other access control device. You could also use a wireless receiver and transmitter to control break or make the loop. Controlling an Electromagnetic Lock WirelesslyIn the above illustration I have substituted a wireless receiver and transmitter for the exit and entry switches in the previous drawing. Following the loop that powers the lock, electricity travels from the positive terminal of the power supply to the Common (C) terminal on the wireless receiver, then out of the receiver through the Normally Closed (NC) terminal to the positive terminal of the magnet. ("Normally Closed" means that the switch is in the closed position unless it is told to open by the wireless transmitter.) The electricity completes its loop by exiting the magnet by the negative terminal (-) and making its way back to the power supply. Notice that an additional pair of wires is needed to power the wireless receiver. When the wireless transmitter is activated the state of the relay on the wireless receiver is changed - that is, the normally closed terminal is changed to open. NOTE: ALWAYS turn the magnet on and off via the positive terminal. Using the negative terminal could cause residual magnetism, a situation where the magnet does not immediately release when powered down.
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