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Wilhelm Hellesen
Frederik Louis Wilhelm Hellesen (2 February 1836 – 22 December 1892) was a Danish inventor and industrialist. In 1887 he designed what is thought to be the first dry cell battery based on the Leclanché cell design. , Jytte Thorndahl; Last accessed on June 26, 2007 Career The same year he founded the company ''W. Hellesen'' In 1889 he sold his first batteries to the Danish Telephone Company. The same year a young chemist Valdemar Ludvigsen (1861–1939) came to the factory helping by the further development of the batteries. When Frederik Hellesen died in 1892 his widow took over the company with the help of Ludvigsen. In 1906 V. Ludvigsen became the sole owner of the factory with the name ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kalundborg
Kalundborg () is a Danish city with a population of 16,659 (1 January 2025),BY3: population 1. January by urban areas, area and population density The Mobile Statbank from the main town of the municipality of the same name and the site of its municipal council. It is situated on the northwestern coast of the largest Danish island, Zealand (or Sjælland in Danish), on the opposite, eastern side of which lies the capital |
Denmark
Denmark is a Nordic countries, Nordic country in Northern Europe. It is the metropole and most populous constituent of the Kingdom of Denmark,, . also known as the Danish Realm, a constitutionally unitary state that includes the Autonomous administrative division, autonomous territories of the Faroe Islands and Greenland in the north Atlantic Ocean.* * * Metropolitan Denmark, also called "continental Denmark" or "Denmark proper", consists of the northern Jutland peninsula and an archipelago of 406 islands. It is the southernmost of the Scandinavian countries, lying southwest of Sweden, south of Norway, and north of Germany, with which it shares a short border. Denmark proper is situated between the North Sea to the west and the Baltic Sea to the east.The island of Bornholm is offset to the east of the rest of the country, in the Baltic Sea. The Kingdom of Denmark, including the Faroe Islands and Greenland, has roughly List of islands of Denmark, 1,400 islands greater than in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inventor
An invention is a unique or novel device, method, composition, idea, or process. An invention may be an improvement upon a machine, product, or process for increasing efficiency or lowering cost. It may also be an entirely new concept. If an idea is unique enough either as a stand-alone invention or as a significant improvement over the work of others, it can be patented. A patent, if granted, gives the inventor a proprietary interest in the patent over a specific period of time, which can be licensed for financial gain. An inventor creates or discovers an invention. The word ''inventor'' comes from the Latin verb ''invenire'', ''invent-'', to find. Although inventing is closely associated with science and engineering, inventors are not necessarily engineers or scientists. The ideation process may be augmented by the applications of algorithms and methods from the domain collectively known as artificial intelligence . Some inventions can be patented. The system of patents wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Industrialist
A business magnate, also known as an industrialist or tycoon, is a person who is a powerful entrepreneur and investor who controls, through personal enterprise ownership or a dominant shareholding position, a firm or industry whose goods or services are widely consumed. Etymology and history The term ''magnate'' derives from the Latin word (plural of ), meaning 'great man' or 'great nobleman'. The term ''mogul'' is an English corruption of , Farsi, Persian or Arabic for 'Mongol'. It alludes to emperors of the Mughal Empire in Early modern India, Early Modern India, who possessed great power and storied riches capable of producing wonders of opulence, such as the Taj Mahal. The term ''tycoon'' derives from the Japanese language, Japanese word , which means 'great lord', used as a title for the . The word entered the English language in 1857 with the return of Matthew C. Perry, Commodore Perry to the United States. US President Abraham Lincoln was humorously referred to as ''th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dry Cell
An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices. When a battery is supplying power, its positive terminal is the cathode and its negative terminal is the anode. The terminal marked negative is the source of electrons. When a battery is connected to an external electric load, those negatively charged electrons flow through the circuit and reach the positive terminal, thus causing a redox reaction by attracting positively charged ions, or cations. Thus, higher energy reactants are converted to lower energy products, and the free-energy difference is delivered to the external circuit as electrical energy. Historically the term "battery" specifically referred to a device composed of multiple cells; however, the usage has evolved to include devices composed of a single cell. Primary (single-use or "disposable") batteries are used once and discarded, as the electrode m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leclanché Cell
The Leclanché cell is a battery invented and patented by the French scientist Georges Leclanché in 1866. The battery contained a conducting solution (electrolyte) of ammonium chloride, a cathode (positive terminal) of carbon, a depolarizer of manganese dioxide (oxidizer), and an anode (negative terminal) of zinc (reductant). The chemistry of this cell was later successfully adapted to manufacture a dry cell. History In 1866, Georges Leclanché invented a battery that consisted of a zinc anode and a manganese dioxide cathode wrapped in a porous material, dipped in a jar of ammonium chloride solution. The manganese dioxide cathode had a little carbon mixed into it as well, which improved conductivity and absorption. It provided a voltage of 1.4 volts. This cell achieved very quick success in telegraphy, signalling and electric bell work. The dry cell form was used to power early telephones—usually from an adjacent wooden box affixed to the wall—before telephones could dr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valdemar Ludvigsen
Hans Valdemar Ludvigsen (20 September 1861 – 11 February 1939) was a Danish businessman and landowner. He owned the Hellesens battery manufacturer in Copenhagen. Early life and education Ludvigsen was born on 20 September 1861 in Copenhagen, the son of Christian Adam L. (1826-1900) and Henriette Frederikke Geisler (1834-1927). His father owned a chemical factory. He attended Odense Cathedral School before studying Applied Chemistry. He also traveled to England and North and Central America, where he studied electrical chemistry and telephone engineering. Career After returning to Denmark in 1887, he partnered with Wilhelm Hellesen who had just obtained a patent on a dry cell battery. In rented premises at Blågårdsgade, Hellesen and Ludvigsen continued to work on the invention. After Hellesen's death, it was commercialized by Ludvigsen and Hellesen's widow as Hellesens Enke / V. Ludvigsen. In 1896 Lidvigsen succeeded in finding the composition of the electrolyte paste that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duracell
Duracell Inc. is an American manufacturer of alkaline batteries, specialty cells, and rechargeables; it is a wholly owned subsidiary of Berkshire Hathaway since 2016. The company has its origins in the 1920s, through the work of Samuel Ruben and Philip Mallory, and the formation of the P. R. Mallory Company. Through a number of corporate mergers and acquisitions, Duracell came to be owned by the consumer products conglomerate Procter & Gamble (P&G). In November 2014, P&G reached an agreement to sell the company to the international conglomeration Berkshire Hathaway through a transfer of shares. Under the deal, Berkshire Hathaway exchanged the shares it held in P&G for ownership of the Duracell business. History Origins Duracell originated via the partnership of scientist Samuel Ruben and businessman Philip Rogers Mallory, who met during the 1920s. The P. R. Mallory Company of Burlington, Massachusetts, United States, relocated its headquarters to Indianapolis, Indiana, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
19th-century Danish Inventors
The 19th century began on 1 January 1801 (represented by the Roman numerals MDCCCI), and ended on 31 December 1900 (MCM). It was the 9th century of the 2nd millennium. It was characterized by vast social upheaval. Slavery was abolished in much of Europe and the Americas. The First Industrial Revolution, though it began in the late 18th century, expanded beyond its British homeland for the first time during the 19th century, particularly remaking the economies and societies of the Low Countries, France, the Rhineland, Northern Italy, and the Northeastern United States. A few decades later, the Second Industrial Revolution led to ever more massive urbanization and much higher levels of productivity, profit, and prosperity, a pattern that continued into the 20th century. The Catholic Church, in response to the growing influence and power of modernism, secularism and materialism, formed the First Vatican Council in the late 19th century to deal with such problems and confirm ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1836 Births
Events January–March * January 1 — Hill Street Academy is named Colombo Academy and acquired by the Government, establishing the first public school in Sri Lanka. * January 1 – Queen Maria II of Portugal marries Prince Ferdinand Augustus Francis Anthony of Saxe-Coburg-Gotha. * January 5 – Former U.S. Representative Davy Crockett of Tennessee arrives in Texas to join the Texan fight for independence from Mexico. * January 12 ** , with Charles Darwin on board, reaches Sydney. ** Will County, Illinois, is formed. * February 8 – London and Greenwich Railway opens its first section, the first railway in London, England. * February 23 – Texas Revolution: The Battle of the Alamo begins, with an American settler army surrounded by the Mexican Army, under Santa Anna. * February 25 – Samuel Colt receives a United States patent for the Colt revolver, the first revolving barrel multishot firearm. * March 1 – Texas Revolution – Convention of 1836: Delegate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1892 Deaths
In Samoa, this was the only leap year spanned to 367 days as July 4 repeated. This means that the International Date Line was drawn from the east of the country to go west. Events January * January 1 – Ellis Island begins processing Immigration to the United States, immigrants to the United States. February * February 27 – Rudolf Diesel applies for a patent, on his compression ignition engine (the Diesel engine). * February 29 – St. Petersburg, Florida is incorporated as a town. March * March 1 – Theodoros Deligiannis ends his term as Prime Minister of Greece and Konstantinos Konstantopoulos takes office. * March 6–March 8, 8 – "Exclusive Agreement": Rulers of the Trucial States (Abu Dhabi, Dubai, Sharjah, Ajman, Ras al-Khaimah and Umm al-Quwain) sign an agreement, by which they become ''de facto'' British protectorates. * March 11 – The first basketball game is played in public, between students and faculty at the Springfield YMCA before 200 spectators. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
