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A mousetrap car is a small vehicle whose only source of motive power is a mousetrap. Variations include the use of multiple traps, or very big rat traps, for added power. Mousetrap cars are often used in physics or other physical science classes to help students build problem-solving skills, develop spatial awareness, learn to budget time, and ...
Leg warmers worn as fashion pieces. Leg warmers are coverings for the lower legs, similar to long socks but thicker and generally footless. Leg warmers are worn to keep the lower legs warm in colder weather. They can be tubular sleeves, long fabric wrappings, or simple pieces of fur or fabric tied around the calves.
Image of a guillotine-style mousetrap seller in the mid-19th century. In February 1855, Emerson wrote in his journal, under the heading "Common Fame": If a man has good corn or wood, or boards, or pigs, to sell, or can make better chairs or knives, crucibles or church organs, than anybody else, you will find a broad hard-beaten road to his house, though it be in the woods.
James Henry Atkinson (c. 1849–1942) was a British ironmonger from Leeds, Yorkshire who is best known for his 1899 patent of the Little Nipper mousetrap. [1] He is cited by some as the inventor of the classic spring-loaded mousetrap, [2] [3] but this basic style of mousetrap was patented a few years earlier in the United States by William Chauncey Hooker in 1894.
The core line of 4x4 vehicles was given a second speed, free-wheeling when the vehicle was off, and wider tires. The Stomper II Authentic featured new graphics and fender flares. The older single-speed Stompers remained, positioned as an economical alternative to the new three-speed Stompers; the single-speeds now had no chrome and decal graphics.
The spring-loaded mousetrap was first patented by William C. Hooker of Abingdon, Illinois, who received US patent 528671 for his design in 1894. [ 4 ] [ 5 ] A British inventor, James Henry Atkinson , patented a similar trap called the "Little Nipper" in 1898, including variations that had a weight-activated treadle as the trip.
There are many designs for the leg mechanisms of walking machines that provide foot trajectories with different properties. Walking vehicles are classified according to the number of legs. Common configurations are one leg (pogo stick, monopod, unipod, or "hopper"), two legs ( biped or bipod), four legs ( quadruped ), and six legs ( hexapod ).
The machine is powered by two symmetric springs hidden in drum-like casings. While one spring would be enough to move the device, two symmetric springs probably looked like a more "logically perfect" solution. Leonardo had been well aware that the powering force provided by the springs drops significantly when they unwind.
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