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Maurice Louis Pinel Jr (1942 – March 5, 2021) was an American mechanical engineer, product designer and bowler.He is known for changing the game of ten-pin bowling with his innovative bowling ball designs, notably using asymmetric core masses which allowed the ball to curve more aggressively in its path down the lane.
See Bowling ball#Layout and grip and Bowling ball#Effect of coverstock, core and layout on ball motion. Layout is also a term referring to the oil pattern used on a lane surface. League: An organized group of bowling teams that compete against each other according to rules and a schedule. Leagues may be certified by a national governing body.
The USBC and World Bowling promulgate bowling ball specifications. USBC specifications include physical requirements for weight (≤16 pounds (7.3 kg)), diameter (8.500 inches (21.59 cm)—8.595 inches (21.83 cm)), surface hardness, surface roughness, hole drilling limitations (example: a single balance hole including the thumb hole for "two-handed" bowlers [3]), balance, plug limitations, and ...
A conventional roll of the bowling ball will enter the 1-3 pocket, and continue to roll from right-to-left (right-hander.) The ball only contacts four pins (1, 3, 5 and 9 pins) to achieve a strike. This type of roll/hit applies to strokers, power strokers and crankers. A conventional bowling form is the most commonly used method in 10-pin bowling.
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The ball used in candlepins has a maximum weight of 2 lb 7 oz (1.1 kg), and has a diameter of 4.5 in (11 cm), [1] making it the smallest bowling ball of any North American bowling sport. The nearly identical weight of the ball, when compared to that of just one candlepin 2 lb 8 oz (1.1 kg), [ 1 ] causes balls to deflect when impacting either ...
A World War I British P Helmet, c. 1915 Zelinsky–Kummant protivogaz, designed in 1915, was one of the first modern-type full-head protection gas masks with a detachable filter and eyelet glasses, shown here worn by U.S. Army soldier (USAWC photo) Indian muleteers and mule wearing gas masks, France, February 21, 1940 A Polish SzM-41M KF gas mask, used from the 1950s through to the 1980s