he figured out the same concept that trains of the time were using, air breaks use air pressure to hold the break open, when the air pressure lowers the break applies, so if the air pressure fails the breaks are on. well the same works with elevators except instead of air pressure it is the weight of the elevator. if the elevator stops being held up the breaks apply, because it was the weight of the elevator being held up (suspended) that backed the breaks off, without that weight the mechanical force (usually springs, but other things have been used, and in one of the images you show it looked like a combination of springs and a ratcheting mechanism that the springs expand and the elevator shaft is set up to catch if they fall in, so not just a break, a full on e break (that is how a car e-break works, that is why it locks the tires))
a normal break is a slide break, an e break doesn't slide once engaged, it stops things from moving, like a wrought iron wrench thrown into the flywheel of a donkey engine.
That Was History i've worked only with digital versions of them, and they are oddly called a dead man's switch. i suppose oddly wouldn't be accurate because the idea comes from where you think it might. but it is the dead mans switch concept, if the operator can no longer operate your device should try to react safely. the same concept though is also applied to very nasty things. i wish i knew who came up with the concept, but it is pretty universally applied at this point.
That Was History just trying to say that it is a pretty basic engineering and design staple and has been for twice my thirty years on earth, and i am no college guy.
I see "OTIS" in my work elevators and wondered about it for the 30 seconds I'm in there. That might not seem like much, but that's (30 seconds) x (2 times a day) x (5 days a week) x (50 weeks a year) x (6 years). It adds up so thanks for this episode!
He developed the idea when trying to get debris from the Lower floor to the Upper floor, not the other way around. Other than that, very informative. Thank you for the video.
he figured out the same concept that trains of the time were using, air breaks use air pressure to hold the break open, when the air pressure lowers the break applies, so if the air pressure fails the breaks are on. well the same works with elevators except instead of air pressure it is the weight of the elevator. if the elevator stops being held up the breaks apply, because it was the weight of the elevator being held up (suspended) that backed the breaks off, without that weight the mechanical force (usually springs, but other things have been used, and in one of the images you show it looked like a combination of springs and a ratcheting mechanism that the springs expand and the elevator shaft is set up to catch if they fall in, so not just a break, a full on e break (that is how a car e-break works, that is why it locks the tires))
a normal break is a slide break, an e break doesn't slide once engaged, it stops things from moving, like a wrought iron wrench thrown into the flywheel of a donkey engine.
That makes a lot of sense. Thanks! You seem well versed in the overall process of these various brakes. Have experience with them?
That Was History i've worked only with digital versions of them, and they are oddly called a dead man's switch. i suppose oddly wouldn't be accurate because the idea comes from where you think it might. but it is the dead mans switch concept, if the operator can no longer operate your device should try to react safely. the same concept though is also applied to very nasty things. i wish i knew who came up with the concept, but it is pretty universally applied at this point.
That Was History the common pinaple grenade has a deadmans switch, if you drop it and the spoon flicks away, well... it goes boom pretty quick.
That Was History
just trying to say that it is a pretty basic engineering and design staple and has been for twice my thirty years on earth, and i am no college guy.
I see "OTIS" in my work elevators and wondered about it for the 30 seconds I'm in there. That might not seem like much, but that's (30 seconds) x (2 times a day) x (5 days a week) x (50 weeks a year) x (6 years). It adds up so thanks for this episode!
That is a long time to wonder about what "Otis" referred to! Glad we could help clear that up.
He developed the idea when trying to get debris from the Lower floor to the Upper floor, not the other way around. Other than that, very informative. Thank you for the video.
austin scott You are indeed correct. Thank you for pointing that out to us. Also, thanks for watching!
nice video :)
great
I think it's ironic that I'm scared crapless of elevators but stuck using them cause of being in a wheelchair.
Yeah, that's quite the predicament. At least our friend Elisha Otis has your back when it comes to keeping elevators safe.