Who Invented Radar?

Who Invented Radar?

The history of radar will show that it began in 1904. German engineer Christian Hulsmeyer created an apparatus capable of detecting an object’s presence some distance away. However, no single scientist invented the modern radar; scientists from several nations worked on it, especially during the 1930s and 40s. Pioneers in Radar Research Hulsmeyer received a patent for his invention in 1904. However it was Nikola Tesla who discovered that frequency could be used to detect the presence of vehicles as well as their course. The succeeding years saw American and European scientists develop various radar devices. Coming on the heels of World War I, nations began to realize how important it could be for warfare. One of the pioneers in the history of radar development was the Frenchman Emile Girardeau in 1934. He got a patent for his work. In 1935 it was put in the Normandie liner. Also that year, America had its first monopulse radar courtesy of Dr. Robert Page. The Russian engineer P.K. Oschepkov invented the RAPID. It could sense the presence of a vehicle within 3 km. A similar model was produced in Hungary a year later by Zoltan Ray. Robert Watson’s Radar System But it was Robert Watson’s invention that showed the radar’s full potential. In 1935, Watson showed his work to the British Air Ministry. During this time, the British were more concerned about the alleged German death ray. Watson stated that such a device was unlikely. At the same his radar impressed the British military that it became part of their defense system, the first in the history of radar. World War II and the Cold War World War II saw more rapid developments in radar technology. Both the British and the...

Who Invented Mother’s Day?...

The history of Mother’s Day in the US started on May 12th, 1908. That was when Anna Jarvis began campaigning for a day to honor mothers worldwide. After the United States adopted it in 1914, other countries followed suit. It is celebrated on the second Sunday of May in the US but other countries use different dates. Antecedents A look at historical records will show that ancient people also set aside days for mothers. The exact origin of this practice is unknown. However, some historians believe it arose from an early form of earth goddess worship. There is evidence the Romans had their own version of Mother’s Day called Matronalia. This was a day dedicated to the goddess Juno. Mothers were special to her. For this reason, the day was marked by gift giving to mothers. Several European countries have always put aside a Sunday just for mothers. This day is known as Laetare Sunday. The chosen Sunday would vary, but among Catholics it was the fourth Sunday at Lent. This date was actually intended for the Virgin Mary and the mother church. But the history of Mother’s Day shows it became an occasion to celebrate motherhood. Today many countries use the date on the fourth Sunday of Lent. Besides the United Kingdom, other European countries also celebrate Mother’s Day on this date. Mother’s Day in Africa and the Middle East The day is celebrated in many African countries. The modern concept of Mother’s Day was adopted from the British. The way it is celebrated varies per country. Usually it is a mixture of local customs with some European elements included. In many Arab countries the day is celebrated on March 12. Bangladesh and Bolivia The day is celebrated...
Who Invented the Calendar We Have Today?

Who Invented the Calendar We Have Today?...

Introduction The modern calendar is known as the Gregorian Calendar. It is named after Pope Gregory XIII who favored it over the Julian Calendar. But Gregory XIII only approved the calendar that bears his name. The actual inventor was Alosyius Lilius. Alosyius Lilius Biography Lilius was an Italian astronomer, physician and chronologist. He was from Ziro in Calabrio, Italy. Lilius’ chosen profession was medicine. He studied in Naples to become a doctor and served under the earl Carafa, a prominent nobleman. Some time later, Lilius began to teach in the Perugia University in 1552. Aside from his interest in medicine, Alosyius Lilius was also fascinated by time keeping and calendars. He noted problems with the Julian Calendar, the one that was being used in his time. So he wrote a paper proposing a new calendar system. But it did not get attention until years after his death in 1576. After Alosyius died, his brother Antonio turned over his manuscript to Pope Gregory XIII. The latter put it for review before a council. It was approved after some changes made by another astronomer, Christopher Clavius. In 1582, Pope Gregory XIII issued a papal bull superseding the Julian with the Gregorian Calendar. It was slowly adopted by Christian countries one after the other. Now it is the system used by virtually everyone in the world. Why the Gregorian Calendar Replaced the Julian Calendar Julius Caesar invented the Julian system. All months had either 30 or 31 days, except for February. February or Februalia had 29 or 30 days depending on whether it was a leap year or not. Caesar named one month after himself, July. When Octavian became Roman emperor, he also renamed a month to August, after his new imperial...
Who Invented the American Flag?

Who Invented the American Flag?...

No one knows for certain where the stars and stripes design came from. Popular accounts of the history of the American flag state that Betsy Ross of Philadelphia designed it. In fact, Ross sewed one of the oldest versions of the flag. There’s no evidence she designed it. Early History The US flag has been altered 26 times since its inception. The first official flag recognized by historians is the Grand Union flag which came out on January 1, 1776. It consisted of 13 stripes (alternately white and red). The British Union Jack was situated on the upper left. It was in May of that year that Ross sewed the flag. A year later on June 14, 1777 the US Congress decreed that the flag have 13 stripes with 13 stars. Based on the history of the American flag, it was this design that Capt. Rob Gray used when he sailed in 1787. In 1795 two stars and stripes were added as Kentucky and Vermont became part of the Union. The 1800s In 1818, the number of stars increased to 20 as more territories became part of the US. However it was decided that the stripes would be kept at 13 for the 13 original states. A year later Illinois joined the US. The 1800s would see more and more territories join the country. By the time California joined, the number of stars had risen to 31. A study of the history of the American flag shows that when the Civil War broke out, the number of stars remained the same. Under orders from President Lincoln, the stars indicating all the states were still part of the flag. By 1890, the stars increased to 43 with Washington, North Dakota...
Who Invented the Paper Clip?

Who Invented the Paper Clip?...

Our modern day paper clip owes its beginnings to William D. Middlebrook. Its patent is dated on November 9, 1899. It is interesting that for over a hundred years, in spite of humble beginnings, no one has yet been able to create a more efficient way to hold loose sheets of paper. We’ll look into who invented the paper clip and its humble beginnings. Early Beginnings Some consider Samuel Fay as the either the forerunner or the man himself who invented the paper clip. However, if you look at the patent he obtained dated April 23, 1867 he called the device as a Ticket Fastener. The original idea that Fay had was to have the ticket fastener attach tickets to garments. In the description of the fastener you’ll find that as an additional use, it could be hold pieces of paper together. Samuel Fay was not the only one who submitted or invented the paper clip’s predecessors or devices like unto it. There were in fact some other 50 designs that were patented that would seem to be early precursors. The difference however is that the designs submitted prior to that of William Middlebrook’s don’t even come close to what the modern day paper clip would look like. Birth of the Paper Clip As mentioned earlier, William Middlebrook is credited as the one who invented the paper clip we know today. He in fact not only invented the paper clip but also the machine that would make paper clips. The drawings on the patent distinctly portray our modern day paper clip. The patent William Middlebrook obtained was for both the paper clip and its production machine. Coming of the GEM In the year 1899 the manufacturing company Cushman and...
Who Invented Zero?

Who Invented Zero?

Few persons ever sit down and think about numbers and where they come from; it is just one of those things that we take for granted. Even if a person does wonder where numbers come from, the typical answer is that numbers originated with Roman numerals, but there are records of numbers being used as far back as 6000 BCE; however this only refers to numbers starting from 1, what about the number zero, where did it come from? The history of the zero is different from that of other numbers as ancient numerical systems did not have a zero, and a space was used where a zero should be. So let’s talk a little about the number zero and how it got into the numerical system. Where Zero Came From There are a lot of different stories about where the number zero comes from; one story says that the zero was first used as a number in India in the 9th century AD by Indian mathematician Aryabhata. It is also said that Indian scholar Pingala along with his fellow scholars used the Sanskrit word ??nya to refer to the number zero. Another story says that the number zero was invented by the Mayan civilization for use on their calendars, while yet another story claims that the zero dates back to 300 B.C. and was invented in Babylon. In the European society there is no evidence of the number zero being used until after 800 AD by the Arabs who were coming to trade with the Europeans; the name zero was also derived from the Arabic language. By 130 AD Ptolemy was using a small circle with a long over-bar to represent a zero; this symbol was used by...
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