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Ermal Cleon "Ernie" Fraze [1] (September 16, 1913 – October 26, 1989) was an American engineer who invented the pull-tab opener used in beverage cans. [ 1 ] Early life
The lock could be integral to the telephone itself or a separate device inserted through the finger hole nearest the finger stop to prevent the dial from rotating. The rotational return speed of the dial to its rest position is controlled by the governor , a mechanical regulating device, that assures a constant electrical pulsing rate of the dial.
A Wordlock letter combination lock.. A combination lock is a type of locking device in which a sequence of symbols, usually numbers, is used to open the lock. The sequence may be entered using a single rotating dial which interacts with several discs or cams, by using a set of several rotating discs with inscribed symbols which directly interact with the locking mechanism, or through an ...
Human communication was initiated with the origin of speech approximately 100,000 BCE. [1] Symbols were developed about 30,000 years ago. The imperfection of speech allowed easier dissemination of ideas and eventually resulted in the creation of new forms of communication, improving both the range at which people could communicate and the longevity of the information.
Padlocks with modular locking mechanisms can often be taken apart to change the tumblers or to service the lock. Modular locking mechanism cylinders frequently employ pin, wafer, and disc tumblers. Padlocks with modular mechanisms are usually automatic, or self-locking (that is, the key is not required to lock the padlock)
Don "Campbellock" Campbell (January 8, 1951 – March 30, 2020) was an American dancer and choreographer who was best known for having invented the "locking" dance, [1] and for his work with The Lockers. Born in Saint Louis, Missouri in January 1951, Campbell discovered dance while studying commercial art at Los Angeles Trade–Technical ...
Historian Charles Susskind in 1962 concluded that Popov did not use radio waves for actual wireless communication before mid-1896. [ 4 ] In 1895 Italian inventor Guglielmo Marconi began work on a purpose-built wireless telegraphy system based on "Hertzian" (radio) waves, developing a spark-gap transmitter and a much improved automatically reset ...
Edwin Howard Armstrong (December 18, 1890 [2] – February 1, 1954 [3]) was an American electrical engineer and inventor who developed FM (frequency modulation) radio and the superheterodyne receiver system.