search results matching tag: pins

» channel: learn

go advanced with your query
Search took 0.001 seconds

    Videos (189)     Sift Talk (8)     Blogs (9)     Comments (768)   

Dangers of Using Electronics in Bathroom

noims says...

Can confirm. A cm or so of insulation on live and neutral pins on plugs here in Ireland (and UK) have definitely saved me and probably my toddler from shocks / death / learning experiences.

I can tell you it was a little alarming seeing how he unplugs stuff. It's hard not to give into the temptation of a few hundred volts of rigged 'I told you so', but no one wants him living like Medhi here.

Shear Pins are Smart (They're Mechanical Fuses)

Payback says...

He says he's "done for the day" because of it. Probably intends to get a new shear pin "tomorrow" and continue mowing. Depending on how far away everything is, it could be more efficient to avoid two extra tractor trips just to repair a pin.

RFlagg said:

I'm still at a loss on why he's waiting for a ride? Disconnect the tractor from the equipment, drive the tractor back... Heck, I'd think even once the PTO shaft was disconnected, he'd still be able to tow the equipment back using the tractor.

EDIT: Of course, I'd guess it would take a few tools to disconnect the equipment so it could drive back, or tow... so perhaps that's what he's waiting for, tools, not really just a ride, and then tow the tractor and equipment back...

Shear Pins are Smart (They're Mechanical Fuses)

greatgooglymoogly says...

I don't think the inertia of the blades have anything to do with breaking the pin, rather the inertia of the motor/pto continuing to drive the shaft after the blades have seized. Same principle though.

Looking Glass (makers of Thief and System Shock games): The

Epic Anti-texting rant

Mordhaus says...

I've driven my wife to work and watched a lady next to me do her makeup (with the visor down and mirror open) while doing the phone pin thing. The same lady was weaving through thick traffic trying to somehow save 10 seconds or so on her trip to wherever she was headed.

It is kind of like that other video about the lady cutting in line, https://videosift.com/video/Man-Addressing-Entitled-Woman-Who-Cuts-The-Line, some people just think their time is more important than yours or the lives of the people in your car.

littledragon_79 said:

Does the same apply to someone with their phone pinned to their ear with their shoulder while they flip through pages of a memo/brief? - true story

Epic Anti-texting rant

Oroville Spillway Damage, Rebar?, Oroville Dam 2-27-17

bobknight33 says...

I have been watching this for the last 2 weeks. Most of CA dams at above normal levels, some at critical levels. A lot of sitting on pins and needles about this and possible Dam failure. Yesterday they shut down the dam so no water is released for inspection and repairs. They have forecast 6 to 8 good days of weather to do dredging and repairs. Hope all goes well.


I have been watching this guy he has been doing a great job.


Why these LEDs glow at all?

greatgooglymoogly says...

Chemical reaction, turns the orange into a battery. LEDs only need 1-3V to turn on so you don't need a very strong reaction. I noticed some of the pins are darker colors, Mr Glove probably dipped one leg in a dissimilar metal or another chemical so the electrons want to move from one pin to the other with the acidic juice as the electrolyte. Look up potato battery for similar experiments.

Is this a negligent or accidental discharge of a gun?

harlequinn says...

Lol. Lebowski.

I'm studying mechanical engineering (hons) with masters in biomedical engineering. It's a head fuck. I don't think anyone offers firearm design as a major itself.

The trigger finger is the primary safety (debatable), and there is usually a secondary safety and sometimes a tertiary safety. It's true that not having it is different than removing it but sometimes they are redundant. For example the palm safety (a tertiary safety on most guns) is often pinned to turn it off permanently because it didn't add any real benefit.

The particular gun in question looks like a CZ-75. A little hunting in the Youtube comments and other people agree. This particular model originally had a firing pin block which was eventually removed on later models (that have the same internals) because it wasn't needed (probably because they also have a thumb safety). This allowed for the short reset disconnector to be put in place (which is a factory part). So CZ ships two lines of the same gun - one with the firing pin block and one without. You're not suddenly unsafe if you remove it from the model that has it. With the quality of the video the way it is though, it could end up being another gun entirely.

Yes, x-ray diffraction is not the only method. It was an example only. The point being that your average gun owner and gunsmiths don't use these sorts of techniques as regular preventative maintenance. And they don't need to, guns are cheap and replacement parts are cheap. If something breaks you replace it. Some parts are replaced on a maintenance schedule (springs spring to mind). Most people never fire enough rounds through their firearms to need to replace anything.

Factory condition firearms malfunctioning is not rare. Factory condition firearms self firing is quite rare. But several model firearms have been affected over the years (meaning millions of firearms). But usually the problem is with a small batch of firearms from within those millions but they always do a blanket recall.

I agree, unintentional firing of a gun is almost always user error.

I still don't believe their is enough information from the video and accompanying text to make a judgment call on this guy.

newtboy said:

That's just, like, your opinion, man. ;-) I wouldn't rely on that position to help in court.

If you're really studying firearm design, you surely know different safety devices are on different firearms. Not having a certain device is different from inexpertly removing one.

Xray inspection isn't the only method, there's dpi (dye penetrant inspection) , magnetic particle, ultrasonic, eddy current testing, etc. I would be surprised to find a competent gunsmith that had never done at least one of those...I've done it for car parts in my garage, cheaply and easily.

How many videos would I find of well maintained factory condition firearms malfunctioning and discharging? I would expect that to be quite rare.

Thanks to safety features and decent quality control, unintentionally discharging is almost always user error, not malfunction, with rare exceptions like you mentioned. In this case it seems to be malfunction, both of the aftermarket part unprofessionally installed and the safety feature he removed that may have stopped the discharge even with the original failure. Imo, that's negligence, whether it in fact caused the discharge or not, because it made it far more likely to unintentionally discharge.

Is this a negligent or accidental discharge of a gun?

harlequinn says...

That's not true either. Following their directions doesn't mean you won't be negligent. Not following their direction doesn't mean you are negligent. You're conflating things. Each situation needs to be judged on it's own merits.

Removing safety features is not negligence unless you make the firearm unsafe. None of my firearms have a firing pin block from the factory. They're all safe firearms. My triggers have been lightened - they're still safe firearms. I've seen triggers lightened so much that they are unsafe. As before, each instance is judged on it's own merits.

I'll soon finish my mechanical engineering degree (and don't you know it, I'm looking for a job in firearm designing), so I do know a little about this stuff. Whilst with the proper equipment you can detect crack propagation or premature wear, this is not done on consumer products like firearms. That's why I wrote "this sort of item". Unless you're going to spend more money than the firearm is worth trying to detect cracks, you won't know it has cracked until you visually identify it.

Sure proper cleaning and gun inspection is part of having a safe, well functioning firearm. But don't fool yourself into thinking it's an aeroplane or space shuttle in inspections. Go ask your local gunsmith - the best one you can find - how many times he's done x-ray diffraction on a firearm for preventative maintenance. Chances are he's going to say zero.

Spend 5 seconds on google and I know you will find multiple videos of factory condition firearms discharging unintentionally. You'll also find recall information affecting millions of firearms - firearms at risk of unintentional discharge.

I should have qualified "much". More or less than 2500 rounds a year?

newtboy said:

You're only obliged to follow directions if you don't want to be negligent.
No injury does not mean no negligence. Not following safety instructions is negligent, as is removing safety features, why you do it or the fact that others are also negligent does not erase the negligence.
You can certainly identify wear patterns and or cracks before this type of discharge occurs in 99.9999999% of cases. Proper cleaning and inspections are part of gun safety.
Not lately, but in the past, yes. I've never seen an unmodified gun fire unintentionally, but I have seen poorly modified guns 'misfire' on many occasions.

Is this a negligent or accidental discharge of a gun?

harlequinn says...

You're not obliged under any circumstances to follow manufacturers warnings or instructions. They are liability limiting instructions (they are for the manufacturers safety against being sued).

Firing pin safety blocks and other "don't sue me" "safety" features are often disabled in competition guns. When something safely fails and nobody is in danger then no negligence has occurred. If you don't get it fixed after the failure then you're negligent at that point.

You don't know if it was a (preventative) maintenance issue. Faulty parts aren't a preventative maintenance issue in this sort of item (since you can't identify a fault until something like this happens - that's when you know it's faulty).

Do you shoot much?

newtboy said:

Because he ignored the manufacturers warnings/instructions AND disabled a safety feature, I can certainly say he was negligent. I can't be certain that negligence was the cause of the discharge, but I can be almost certain.
As to the 'it worked for 1000 rounds' argument...maintenance is 100% the owners responsibility.

Samantha Bee - Fake News, Real Consequences

Don't Tell Mummy!

enoch says...

my dad used to own a 1965 GTO.
that car was a BEAST,and he would do the very same thing when i was around this little girls age.

oh the joy of being pinned to the seat to the deafening growl of the engine, and watching the trees whip by at,what seemed to my little eyes,warp speed.

seatbelts?
what seatbelts?
didn't come standard with a GTO,and who needed em?
(maybe they did and they were just jammed so thoroughly into the cracks of the seats that we didn't even know they were there).

and then my mother made my dad trade the GTO in for VW bug,and so began my fathers slow decline into a suburbia fueled nightmare of mediocrity.

(i kid.he was still pretty fucking awesome).

You Can't Have My Wifi

JustSaying says...

Funny story, out of my own stupidity I made my WIFI vulnerable and somebody used my connection without my knowledge to download some obscure swedish war movie. A few weeks later I get mail from a bunch of lawyers and ended up paying 300 bucks for that shit.
You want my WIFI password? No, but if it's a real emergency you could use my computer while I watch.
Not an emergency? You can always go home if you're bored by me.

There's a reason that shit is password protected. I'll lend you ten bucks but I won't tell you my credit card's PIN. I'll give you a lift but I won't give you my car.

Bill Maher Monologue Oct 28

MilkmanDan says...

I don't care about the timing, political motivation, etc. etc. of this discovery of new emails. I think only 2 things matter:

1) Are they real / legitimate. But with all of the previous leaks, I never saw the Clinton camp trying to suggest that anything was fabricated. Taking stuff out of context to make it appear worse than what it arguably is doesn't count count as "fabricated". As much as I dislike Clinton, I have to give her credit for dealing with the out of context stuff so far in the proper way -- fill in the context so that people can make up their own minds (like some of the Wall Street speech excerpts, "public and private position", etc.).

2) Do they show anything actually criminal, even it is relatively minor. Capone went down for tax evasion, because that was the only thing they could successfully and concretely pin on him. And yet justice was served by going forward with that.

IF (and it remains a big if) these new emails end up meeting both of those criteria, I have absolutely zero sympathy for the whining that already has and will continue to erupt from the Democrat party.

Being a candidate in a presidential election paints a giant target on you and guarantees that your past is going to be under the microscope. If you've got skeletons in your closet, there is a very high chance for them to be discovered. Trump has had a well-deserved taste of that already -- maybe it is Clinton's turn now.



Send this Article to a Friend



Separate multiple emails with a comma (,); limit 5 recipients






Your email has been sent successfully!

Manage this Video in Your Playlists

Beggar's Canyon