u/Ham549

Title says it all I was wondering if anybody else has any unique or antique elevators or those old hand-powered dumbwaiters at the workplace.

Need help figuring this out

I have this dumbwaiter pulley system, the smaller is where the cable for the dumbwaiter car goes over and then goes to the counterweight. When the small pulley is turned it rests on a threaded rod which causes it to press against the gear and ratchet that locks it up and prevents it from turning further. If you turn the big pulley (this would be where the loop of rope is attached that you pull to raise and lower the dumbwaiter) it unscrews the smaller pulley pulling it away from the ratchet wheel and allowing it to turn. The problem with this is this mechanism only locks up in one direction if I try turning the smaller pulley and the other direction the whole thing spins freely. The pulley would need to lock up in both directions either to hold everything stationary when the dumb- waiter wants to drift down when loaded or when the dumbwaiter car is empty and the heavier counterweight wants to pull it up. Here is a video I made

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https://youtu.be/nYzFT2y67IQ?is=Jh3y-eyD90Vq\\\_Tgn

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I can't seem to find any patents from the energy elevator company addressing how the system is supposed to work the closest one I found was this but I don't know if it works the same.

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https://patents.google.com/patent/US950828A/en?q=(Dumbwaiter)&num=25&oq=Dumbwaiter&sort=old&page=7 I still can't figure out how it locks up when not utilizing the ratchet wheel.

I have this dumbwaiter pulley system, the smaller is where the cable for the dumbwaiter car goes over and then goes to the counterweight. When the small pulley is turned it rests on a threaded rod which causes it to press against the gear and ratchet that locks it up and prevents it from turning further. If you turn the big pulley (this would be where the loop of rope is attached that you pull to raise and lower the dumbwaiter) it unscrews the smaller pulley pulling it away from the ratchet wheel and allowing it to turn. The problem with this is this mechanism only locks up in one direction if I try turning the smaller pulley and the other direction the whole thing spins freely. The pulley would need to lock up in both directions either to hold everything stationary when the dumb- waiter wants to drift down when loaded or when the dumbwaiter car is empty and the heavier counterweight wants to pull it up. Here is a video I made

​

https://youtu.be/nYzFT2y67IQ?is=Jh3y-eyD90Vq\_Tgn

​

I can't seem to find any patents from the energy elevator company addressing how the system is supposed to work the closest one I found was this

​

https://patents.google.com/patent/US950828A/en?q=(Dumbwaiter)&num=25&oq=Dumbwaiter&sort=old&page=7 I still can't figure out how it locks up when not utilizing the ratchet wheel.

Can't seem to find any information that isn't Batman related.

So apparently Amtrak had a ditch getting double decker cars because if they did it would require an elevator and no company wanted to do that. Just for fun I tried to come up with a way to fit a elevator in a train car that takes up as little space as possible and being as simple as possible. No I'm no mechanical engineer nor do I play one on TV but I was bored at work and decided to have fun figuring this out. For simplicity I went with a ACME screw and had it placed by the back rear corner of the hoist way. The other corner would hold the guide assembly which could be a rigid mounted pole that go through the sling assembly with nylon pads. The screw would be geared directly to a three-phase brake motor. I don't know do I have mechanical engineering in my future 😂

So I have this pulley system from an Energy Elevator Company hand powered dumbwaiter. I decided to make a video explaining my problem here

https://youtu.be/nYzFT2y67IQ?si=JlUj0IeSZdqJS6ZN

I'm thinking it might be this patent

https://patents.google.com/patent/US950828A/en?q=(Dumbwaiter)&num=25&oq=Dumbwaiter&sort=old&page=7 but I'm having trouble understanding it.

The company is long since gone and so is any information and I'm at my wit's end.

Anybody run facilities with hand-powered dumbwaiters or elevators?

Hope this is allowed, the F40 pH preservation Society is raising funds to get the Library of Congress to scan a railroad films in the public domain with plans to release it on the internet archives. https://www.gofundme.com/f/support-the-f40ph-preservation-societys-mission?fbclid=IwdGRzaASAeixjbGNrBIB6JmV4dG4DYWVtAjExAHNydGMGYXBwX2lkDDM1MDY4NTUzMTcyOAABHvaFR94k-EVF7c8vAt99jdAJO2zx10TSe7z4Ko\_6REM0n5DPRogg\_yTGrLac\_aem\_Lpi1AsLtn5t17j9e0OhReg&utm\_id=97757\_v0\_s00\_e227\_tv2\_tp1\_a1demo0ebqqf9t

Anyone good with woodworking and want to help build an educational display? I want to get a frame built for this electric motor roter and and be able to slide in and out magnets to show how it works. The top image is the kind of thing I'm talking about the picture on the bottom is of the actual rotor I have.