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Lockitron is a device which can lock and unlock doors via remote control, typically via a smartphone. Starting with installations in 2010, it is one of the earliest examples of a smart lock . Lockitron was made by Apigy Inc., a start-up based in Mountain View, California .
A door phone or door bell phone is a set of electrical and electronic elements used to handle communication between a resident in a house, apartment or villa and a guest outside. The device can also lock or unlock the door it has been configured to work with. Door phones have been used across a variety of commercial and residential buildings ...
Old door bell pull knobs in Edinburgh, United Kingdom.It is unclear whether bells were rung by wire and pulleys, or by electrical connection. In most wired systems, a button on the outside next to the door, located around the height of the doorknob, activates a signaling device (usually a chime, bell, or buzzer) inside the building.
A quick demonstration of an electronic door lock. 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.
An electric buzzer uses a similar mechanism to an interrupter bell, but without the resonant bell. They are quieter than bells, but adequate for a warning tone over a small distance, such as across a desktop. A buzzer or beeper is an audio signalling device, which may be mechanical, electromechanical, or piezoelectric.
A buzzer or beeper is an audio signaling device, [1] which may be mechanical, electromechanical, or piezoelectric (piezo for short). Typical uses of buzzers and beepers include alarm devices , timers , train and confirmation of user input such as a mouse click or keystroke.
A U.S. Marine performs a ballistic breach of a padlocked door using a combat shotgun. Door breaching is a process used by military, police, or emergency services to force open closed or locked doors. A wide range of methods are available depending on the door's opening direction (inward or outward), construction materials, etc., and one or more ...
Assa Abloy was founded at the merger of the two companies Assa and Abloy in 1994. Assa stands for August Stenman Stenman August. [7] [8] The name Abloy comes from a contraction of the Swedish Finnish bilingual name Ab Låsfabriken Lukkotehdas Oy, meaning literally Corp. Lock Factory Lock Factory Corp. (first Corp. and Låsfabriken from Swedish, last Lukkotehdas and Corp. from Finnish).