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Hiram Maxim originally designed the Pom-Pom in the late 1880s as an enlarged version of the Maxim machine gun.Its longer range necessitated exploding projectiles to judge range, which in turn dictated a shell weight of at least 400 grams (0.88 lb), as that was the lightest exploding shell allowed under the Saint Petersburg Declaration of 1868 and reaffirmed in the Hague Convention of 1899.
The first naval pom-pom was the QF 1.5-pdr Mark I, a piece with a calibre of 37 mm (1.46 in) and a barrel 43 calibres long. This was tested in the Arethusa -class light cruisers HMS Arethusa and Undaunted but did not enter full service, being replaced instead by a larger weapon, the QF 2-pdr Mark II (see below).
2-pounder gun, 2-pounder and QF 2 pounder or QF 2-pdr are abbreviations used for various guns which fired a projectile weighing approximately 2 pounds (0.91 kg). These include: These include: QF 2 pounder Mk II & Mk VIII "pom-pom" Vickers 40mm naval anti-aircraft autocannon of the First World War and the Second World War
In that form, the "QF 40 mm Mark III" (Mk II was a designation used for a version of the naval "pom-pom" anti-aircraft gun), became the army's standard light anti-aircraft (AA) weapon, operating alongside their 3-inch 20 cwt and 3.7-inch heavy AA guns. British production started slowly and, by September 1939 only 233 equipments had been produced.
There is anecdotal evidence that Africans first hearing it in South Africa referred to its sound as pom-pom. It might be difficult to verify that, but certainly it was referred to as a pom-pom by many sources from then on, and the term seems to have been used a generic label for (relatively) slow-firing automatic weapons such as its 2-punder ...
A pair of octuple mounts for 2-pounder (40 mm (1.6 in)) Mk VIII "pom-pom" anti-aircraft guns were added abreast the funnel and two positions for their directors were added on new platforms abreast and below the spotting top.
QF 1-pounder pom-pom, an infantry gun of the Second Boer War; QF 2-pounder naval gun, a British anti-aircraft gun in naval use Pom-Pom director, a fire-director for QF 2 pounder naval gun; USS Pompon (SS-267), a U.S. Navy submarine built during World War II
As part of an effort to provide a visually appealing device for cheerleaders, given the advent of color television, his pom-pon with a hidden handle was granted patent 3,560,313 by the United States Patent and Trademark Office in 1971. Herkimer chose the name "Pom pon" after hearing that the word "pompom" had vulgar meanings in other languages.