Search results
Results from the WOW.Com Content Network
Doorbell at the entrance of Chetham's Library, Manchester, England Sound of a two-tone mechanical doorbell. A doorbell is a signaling device typically placed near a door to a building's entrance. When a visitor presses a button, the bell rings inside the building, alerting the occupant to the presence of the visitor. Although the first ...
The most widely used form is the interrupter bell, which is a mechanical bell that produces a continuous sound when current is applied. See animation, above. The bell or gong (B), which is often in the shape of a cup or half-sphere, is struck by a spring-loaded arm (A) with a metal ball on the end called a clapper, actuated by an electromagnet ...
The missing ones are a movie outline of The Songs of Distant Earth (from "The Sentinel"; this is not the short story of the same name) and a short sketch titled "When the Twerms Came", which originally appeared in Clarke's non-fiction book The View from Serendip (1978) and was later reprinted in the 1987 edition of The Wind from the Sun.
A smart doorbell is an internet-connected doorbell that notifies the home owner on his or her device (smartphone or any other gadget) when a visitor arrives at the door. It activates when the visitor presses the button of the doorbell, or alternatively, when the doorbell senses a visitor with its built-in motion sensors. The smart doorbell lets ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
It begins with a piece of Flash fiction based on the following passage by Thomas Bailey Aldrich: Imagine all human beings swept off the face of the earth, excepting one man. Imagine this man in some vast city, New York or London. Imagine him on the third or fourth day of his solitude sitting in a house and hearing a ring at the door-bell! [1]
Flames were lit on one tower, then the next tower would light a flame in succession. The Byzantine beacon system was a semaphore developed in the 9th century during the Arab–Byzantine wars . The Byzantine Empire used a system of beacons to transmit messages from the border with the Abbasid Caliphate across Asia Minor to the Byzantine capital ...
Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.