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Unican Security Systems Ltd. was a Canada-based company created by Aaron Fish in the 1960s and sold in 2000. At its sale (to Kaba Group ), the company had over $800 million in sales annually and was the largest maker of key blanks and key copying machines in the world.
Modern outdoor phone plate with a push buttons matrix. A door phone in its most basic version is a two-way intercom allowing communication from the street to the inside of a building. More complex door phones are connected to electric strikes, and can unlock and open the door to allow access to the interior of the building. [1]
Today, passive systems are commonly found on a variety of vehicles, and although the exact method of operation differs between makes and models, their operation is generally similar: a vehicle can be unlocked without the driver needing to physically push a button on the key fob to lock or unlock the car.
Review: "This door lock is great! It is just what I needed to secure my apartment door at night. It is easy to use and works well. I recommend it. In the past I was considering buying a door knob ...
Burglars don't want to get caught, which is why they usually wait until you're out of your house before they break in. Who's tipping them off that you're out of town and your house is a sitting duck?
Electric locks use magnets, solenoids, or motors to actuate the lock by either supplying or removing power. Operating the lock can be as simple as using a switch, for example an apartment intercom door release, or as complex as a biometric based access control system. There are two basic types of locks: "preventing mechanism" or operation ...