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Unpopular inventions 10-11 класс

Top 10Slide projectorPolaroidGramophoneVideo tape recorderReceiverPagerTypewriter

Слайды и текст этой презентации

Слайд 1Unpopular inventions

Unpopular inventions

Слайд 2 Top 10
Slide projector
Polaroid
Gramophone
Video tape recorder
Receiver
Pager
Typewriter

Top 10Slide projectorPolaroidGramophoneVideo tape recorderReceiverPagerTypewriter

Слайд 3 Slide projector
A slide projector is an opto-mechanical device to view photographic slides. Slide projectors

became common since the 1950s as a form of entertainment;

family members and friends would gather to view slide shows. In-home photographic slides and slide projectors have largely been replaced by low cost paper prints, digital cameras, DVD media, video display monitors, and video projectors.
Slide projectorA slide projector is an opto-mechanical device to view photographic slides. Slide projectors became common since the 1950s as

Слайд 4Polaroid
Polaroid Corporation - the American company, engaged in the manufacture

of photographic equipment and consumer electronics (LCD TVs, portable DVD

players, digital photo frames). The most widely known as the manufacturer of cameras that allow to make snapshots.
PolaroidPolaroid Corporation - the American company, engaged in the manufacture of photographic equipment and consumer electronics (LCD

Слайд 5Gramophone
Gramophone (from the Greek. γράμμα record, φωνή output) device for

sound playback gramophone record. Gramophone is a modification of the phonograph,

independently invented in 1877 Charles CROs and Thomas Edison. Emile Berliner, having familiarized with the works of CROs, decided to replace the cylinder for recording and playback sounds to use disks. New invention called the gramophone, was patented Berliner 26 September 1887. Records originally made of ebonite, then shellac.
GramophoneGramophone (from the Greek. γράμμα record, φωνή output) device for sound playback gramophone record. Gramophone is a

Слайд 6Video tape recorder
VCR - recorder television image and sound on

the tape, and their subsequent playback. From a tape recorder

differs repeatedly increased stripe recordable frequency and device picker high precision. Obtained through your VCR to record images and sounds is called video soundtrack. The ability to record high-frequency and pulse signals makes VCR suitable not only for movies, but also to other application tasks, connected with registration information.
Video tape recorderVCR - recorder television image and sound on the tape, and their subsequent playback. From

Слайд 7Receiver
Radio (room radio receiver device) - a device for reception

of electromagnetic waves radio range (that is, with the wave

length from a few thousand metres to tenths of a millimeter) followed by conversion to the information of the type for which it could be used.
ReceiverRadio (room radio receiver device) - a device for reception of electromagnetic waves radio range (that is,

Слайд 8Pager
Pager (from the English. page - call, which in turn

derives from the word page - page, servant, an errand

boy - cf. «to send a page after») receiver personal call. Pager is designed so that allows to receive the messages sent through paging network. To send a message to a pager, you need to dial a telephone operator, to inform number or name of the subscriber and to dictate a message. The first in the world pager released Motorola in 1956. The first pagers have adopted the hospitals and managers. Then pagers got all those who wanted to be always available.
PagerPager (from the English. page - call, which in turn derives from the word page - page,

Слайд 9Typewriter
Typewriter (typewriter) mechanical, Electromechanical, or electronic-mechanical device, equipped with a

set of keys, press which causes printing to the corresponding

characters on the media (in most cases this paper). Was widely used in the XIX-XX centuries. Currently typewriters mostly obsolete, their function started to run personal computers, printers equipped.
TypewriterTypewriter (typewriter) mechanical, Electromechanical, or electronic-mechanical device, equipped with a set of keys, press which causes printing

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