Can Openers

Best Buy

A faucet handle and jar lid are simple machines.

a con opener cost about 20.00

The average can opener can range anywhere form eight dollars and ninty nine cents for a standard hand cranked can opener to thirty six dollars and ninty nine cents for an automated can opener.

It impacts on the society by opening cans and giving us a permenant way to preserve food.

The name "P38" is a slang term, and not an official name. The original P38 was the German 9mm Pistol (P) made in 1938 (38). The name was borrowed for the C-Ration opener. Still have mine on my dogtags!

Absolutely, there are multiple magnets with several copper coil rolls with metal weights that let it spin by being pushed with your houses 120.

Take that same motor, say you find a decent one that no longer works... Keep the plug and wire, the extra wire inside, the motor and everything attached to it as well as the blades (hope there's room for the last part) and a couple of 12V (NOT CHEAP OR TINY, VERY IMPORTANT THAT THE CCA ARE HIGH) batteries.

You can take it all apart and make an ACTUAL electromagnet and apply the right power to it to bring metal flying towards it, or do something special like making an object float in mid air with your DIY project and turn around and make some money off nothing but that motor, included power supply and whatever light object you choose.

Maybe a 3D printed lithophane (cube, sphere etc. whatever you choose and have it slowly (or quickly) spin while hovering in mid air)!

That part depends on the strength of the copper coils, grade of copper (use grade 1 obviously), strength of the magnets (rare earth are very strong and more expensive because of it) and with about 30 minutes work and assuming you have a broken (or not, if you don't mind breaking one) can opener, then in 30 minutes you will be done.

Lithophanes and globes/planets/moon are all very popular and you can make a ton of money off of them or just make great gifts. Google LITHOPHANE if you haven't seen them. People online charge $400 for something you can do for $40 or less, potentially $5 if you already have extra pieces of 5V (or 12V, but it's more expensive and complex) power supplies, you shouldn't use them with just direct power, which is where a good can opener comes in, it's still regulated. If it's something small, you don't need anything extra at all really...

You didn't ask about that part and it's been awhile since it was asked, but I thought I would share something you could do with them!

So something like this is very basic, now imagine it being something cooler, like a bunch of pictures lit up and spinning.

It will only attach one image, so I'm going to go with this one, the rights aren't mine, but they are attached to the image. This is something very basic that you can do with these magnets though!

In 1858, Ezra Warner patented his design for a can opener in America. Tin cans were first invented around 1810 but these cans were very thick and needed hammers and chisels to open. Later in the 19th century, cans became more thin like they are today. I got my information from Wikipedia.

The kind with a rip -top, as in pet food cans

He invented it in precisely 1952. So they say.

Not necessarily. One type is simply a leveraged blade.

at the u.s military

Lever

Most were very primitive with hard edges and corners, but later in the decades they became more rounded

The can opener was invented after the invention of the can. Before it's arrival, cans were opened by many and dangerous ways. The dedicated opener made the operation quicker and safer than previous methods.

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1858

1858

Think about it. You must clamp the can opener onto the can (lever). After squeezing the can opener onto the can using LEVERAGE, two small metal discs WEDGE themselves into the can. Then finally by manually turning the can opener, you are utilizing a GEAR, WHEEL and AXLE system to open the can. Hope that helps.

With enough force behind it, nearly anything can kill you. If you somehow manage to cut an artery using the can opener, or if you cut yourself with it and got tetanus from it, you could die. Also, someone could kill you with a can opener if they hit you hard enough.

On its own, a can opener cannot kill you, as it is an inanimate object.

It allows you to actually eat the food that's been canned without bashing the can open or chopping it open with something sharp. Both of these methods would result in you hurting yourself.

An electric can opener typically ranges from 40 to 100 watts, depending on the model and brand.

Well, the military... It's a great little tool. If the question is "where can you buy one?", you can usually pick them up for a few cents in a military surplus store. Hiking outfitters have started selling a larger version for a couple of bucks.