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This is an accepted version of this page This is the latest accepted revision, reviewed on 23 January 2025. Type of clock A traditional wind-up (key-wound), mechanical spring-powered alarm clock An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time. The primary function of these clocks is to awaken people from their night's sleep or ...
an alarm clock that sounds an alarm at a pre-set time, often used to wake a person up or remind them of an event. a fire alarm which is used to give occupants of a building early warning of a potential fire and give them time to evacuate. warning devices on a vehicle that sound when it is moving in an unexpected direction, such as reversing,
In the United Kingdom, a warbling signal sounding rather like an alarm siren is played at steadily increasing volume to a telephone left off-hook and unused on telephone lines provided by the BT Group and many PABX extensions. It is sometimes referred to as a howler. In some cases it is composed of the DTMF tones * and # played alternately.
[12] [13] Google unveiled the first Android TV device, the Nexus Player developed by Asus, at a hardware event in October 2014. [14] The ADT-2 development kit device was released before the release of Android TV 9.0. [15] Android TV 10 was released on December 10, 2019, [16] together with the ADT-3 development kit. [17]
Clock is a timekeeping mobile app available since the initial launch of the iPhone and iPhone OS 1 in 2007, [1] with a version later released for iPads with iOS 6 (however could unofficially be installed before [2]), [3] and Macs with the release of macOS Ventura. The app consists of a world clock, alarm, stopwatch, and timer.
On hook telephone handset. The term on-hook has the following meanings: . The condition that exists when a telephone or other user instrument is not in use, i.e., when idle waiting for a call.
Reliability was improved by renting two lines for the service between Herstmonceux and the BBC, with a changeover between the two at Broadcasting House if the main line became disconnected. The tone sent on the lines was inverted: the signal sent to the BBC was a steady 1 kHz tone when no pip was required, and no tone when a pip should be sounded.
Clock drift refers to several related phenomena where a clock does not run at exactly the same rate as a reference clock. That is, after some time the clock "drifts apart" or gradually desynchronizes from the other clock. All clocks are subject to drift, causing eventual divergence unless resynchronized.