موسوعة العلمـاء و المخترعين .. المخترعون بالترتيب حسب اسم الشهرة .. الحرف ١_د

Encyclopedia of Scientists and Inventors..the inventors in order according to their nickname..the letter 1_d

⏹Dell, William de Bois
William du Bois Duddel ,

English inventor and engineer (1872 - 1914)
Dudel was a member of the British Royal Society. Focused most of his activities in the field of radio engineering and radiotelegraphy · Invented a very improved design of the Oscillograph to convert sound waves into electromagnetic pulses.

⏹ Douglas, Donald W. ( Little )
Donald W. (John) Douglas,

American aeronautical engineer (1892 - )
Douglas is considered one of the most prominent contemporary aeronautical engineers.
He and a team of engineers worked on designing aircraft suitable for commercial purposes, and in 1935 Douglas and his team were able to design the first 3 DC aircraft, which could be used to transport passengers by air in a profitable manner.

⏹ Danswood, Henry Harrison
Dunswood, Henry Harrison

American physicist (1842 - 1940)
Dunswood worked in electricity and was interested in radio waves. He invented a radio wave detection device that works with carborundum crystals (which is an industrial chemical compound consisting of carbon and silicon made by Edward Goodrich Acheson in the year 1891).

⏹ Dollond, John

British optician (1706-1761)
Dollond grew up as a silk weaver. He studied traditional languages, mathematics and science. - He participated with his son, inventor Peter (1730-1820), in making optical instruments. · Alf Dollond on the topic of light.
He invented the lens that does not analyze light (achromatic) (it consists of flint glass and crown glass). His nephew George (1774-1852) was also an inventor in the field of optical devices.

Dibar, Joseph Frederick Walsh (Walt)
Desbarres, Joseph Frederick Walsh (Wallet)

English military engineer and hydrologist
( 1824 - 1722 )
He surveyed Nova Scotia and Newfoundland and made a map of the coast of North America. He held a number of government administrative positions.

DeBrainer, Johann Wolfgang
Dobereiner, Johann Wolfgang

German chemist (1780 - 1849)
Debreiner worked as a professor of chemistry in “Bina” and he is the author of the triad theory named after him, which is related to the properties of periodic chemical elements.
Debreiner worked in the study of the intermediate properties of platinum, and through his research he invented an instantaneous light bulb bearing his name: “Debreiner Lamp”.

⏹ Deprez, Marcel Deprez, Marcel

French engineer (1843 - 1918)
Debre was a pioneer in the field of electricity, and he is credited with the long-distance transmission of electric current for the first time between Munich and Messeach. He made studies on friction in electric motors.