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Smart lock. A smart lock is an electromechanical lock that is designed to perform locking and unlocking operations on a door when it receives a prompt via an electronic keypad, biometric sensor, access card, Bluetooth, or Wi-FI from a registered mobile device. These locks are called smart locks because they use advanced technology and Internet ...
A typical modern padlock and its keys. A lock is a mechanical or electronic fastening device that is released by a physical object (such as a key, keycard, fingerprint, RFID card, security token or coin), by supplying secret information (such as a number or letter permutation or password), by a combination thereof, or it may only be able to be opened from one side, such as a door chain.
Operation. The principle behind an electromagnetic lock is the use of electromagnetism to lock a door when energized. The holding force should be collinear with the load, and the lock and armature plate should be face-to-face to achieve optimal operation. The magnetic lock relies upon some of the basic concepts of electromagnetism.
An electronic lock (or electric lock) is a locking device which operates by means of electric current. Electric locks are sometimes stand-alone with an electronic control assembly mounted directly to the lock. Electric locks may be connected to an access control system, the advantages of which include: key control, where keys can be added and ...
Phase-locked loop. A phase-locked loop or phase lock loop ( PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input signal. Keeping the input and output phase in lockstep also implies keeping the input and output frequencies the same, thus a phase-locked loop can also track an input frequency.
Yale is a lock manufacturer and a subsidiary of Assa Abloy. The company is headquartered in Stockholm, Sweden. Its initial product was the Yale lock, invented by Linus Yale Sr., and it became the foundation of the enterprise founded by Linus Yale Jr. and Henry R. Towne. Its markets were initially in the United States, and expanded across the ...
Best Lock Corporation was established later to manufacture and sell a new tubular lockset called the 10K. Over time, the roles of these three companies changed. Frank E. Best, Inc. became, in effect, a holding company above Best Universal Lock Corporation, which in turn, controlled Best Lock Corporation which manufactured and sold the Best line ...
Lock (computer science) In computer science, a lock or mutex (from mutual exclusion) is a synchronization primitive that prevents state from being modified or accessed by multiple threads of execution at once. Locks enforce mutual exclusion concurrency control policies, and with a variety of possible methods there exist multiple unique ...