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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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$100 Homebuilt Elevator Photos Uploaded - No hassle viewing
I tried several cites and I finally found a no hassle free cite.
If you are interested in seeing a really simple, fast, and SAFE single story 8' lift elevator capable of lifting 300 pounds in 10 seconds, go to: http://community.webshots.com/script...bumID=96391689 Thanks for all of your suggestions and for your help. BoyntonStu |
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$100 Homebuilt Elevator Photos Uploaded - No hassle viewing
In article , Stu says...
http://community.webshots.com/script...bumID=96391689 Hmm. This is what shows up: Error A problem has been detected. You do not appear to be the owner of this album. Make sure you are logged in. ================================================== please reply to: JRR(zero) at yktvmv (dot) vnet (dot) ibm (dot) com ================================================== |
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$100 Homebuilt Elevator Photos Uploaded - No hassle viewing
Stu wrote:
... http://community.webshots.com/script...bumID=96391689 .... The site doesn't like this full URL. Try http://community.webshots.com/, then search for user "boyntonstu". |
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$100 Homebuilt Elevator Photos Uploaded - No hassle viewing
"Bob Engelhardt" wrote in message ... Stu wrote: ... http://community.webshots.com/script...bumID=96391689 ... The site doesn't like this full URL. Try http://community.webshots.com/, then search for user "boyntonstu". no luck for me either!! What happened to the metalworking dropbox?? GReg |
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$100 Homebuilt Elevator Photos Uploaded - No hassle viewing
Interesting. But what do you carry on it? A person?
"Stu" wrote in message om... I tried several cites and I finally found a no hassle free cite. If you are interested in seeing a really simple, fast, and SAFE single story 8' lift elevator capable of lifting 300 pounds in 10 seconds, go to: http://community.webshots.com/script...bumID=96391689 Thanks for all of your suggestions and for your help. BoyntonStu |
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$100 Homebuilt Elevator Photos Uploaded - No hassle viewing
jim rozen,
78 visits to see the photos have been recorded in just a few hours. I suggest that u try going to webshots.com and search for: Boyntonstu, elevator, homebuilt, or $100. This was supposed to be easy. Yuch! BoyntonStu wrote in message ... In article , Stu says... http://community.webshots.com/script...bumID=96391689 Hmm. This is what shows up: Error A problem has been detected. You do not appear to be the owner of this album. Make sure you are logged in. ================================================== please reply to: JRR(zero) at yktvmv (dot) vnet (dot) ibm (dot) com ================================================== |
#7
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$100 Homebuilt Elevator Photos Uploaded - No hassle viewing
"AL"
Me and so far, anyone else 300lb or less. BoyntonStu wrote in message news:tRlmb.21648$e01.44641@attbi_s02... Interesting. But what do you carry on it? A person? "Stu" wrote in message om... I tried several cites and I finally found a no hassle free cite. If you are interested in seeing a really simple, fast, and SAFE single story 8' lift elevator capable of lifting 300 pounds in 10 seconds, go to: http://community.webshots.com/script...bumID=96391689 Thanks for all of your suggestions and for your help. BoyntonStu |
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$100 Homebuilt Elevator Photos Uploaded - No hassle viewing
The mechanism is the 3/4" pipe clamp sandwiched between the 1-1/2" floor flanges. The chain rides up the 5/16" bolts and off-loads the spring
loaded brake. Should the cable break, the brake instantly comes on and nothing falls or slides down. Now this is a clever idea... but two things come immediately to mind: 1. the "5/16" bolts" that are being loaded improperly are far more likely to break without warning than the cable. (dynamic load vs. static - also stress) 2. the "brake" is a clever application of a pipe clamp, BUT the thing will work IF nothing interferes with the little pipe clamp's lever, and the spring doesn't fail. Not failsafe. I wouldn't want to trust my life or limb to the soft metal leaves in a typical pipe clamp. It's not a bad idea, but I'd look around for a commercial brake that happens to also be failsafe and concentric around a pipe or rod, and either buy one or copy it. The concept is right - its the same one used in commercial elevators - if the load is removed, the brake engages. But the implementation here is very, very tenuous. (not to mention the questionable strength of the casting - is it Chinese?) Also, I don't know what you did to cantilever out the wood platform, but it had better be really well done, and without flaws - hopefully welded or using real steel hardware, not stuff like that "5/16" bolt arrangement. Then too, you need something to permit the platform to have a bearing surface for the rotational forces - looks like ur using the wall now. Try a strip of sheet steel and a roller or fixed wheel mounted on two sides - or something more formal... This might be ok for freight, but not people as it now stands. But it has *potential*... Oh, don't lean your toes over the edge going up... (good place for a reversing switch??) _-_-bear Bob Engelhardt wrote: Stu wrote: ... http://community.webshots.com/script...bumID=96391689 ... The site doesn't like this full URL. Try http://community.webshots.com/, then search for user "boyntonstu". |
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$100 Homebuilt Elevator Photos Uploaded - Very Dangerous!
You wouldn't catch me on that thing. Does your insurance agent know about
it? I'll bet not! What happens if someones foot isn't all the way on the platform as you go up through the opening. Off go the toes! Lane "Stu" wrote in message om... "AL" Me and so far, anyone else 300lb or less. BoyntonStu wrote in message news:tRlmb.21648$e01.44641@attbi_s02... Interesting. But what do you carry on it? A person? "Stu" wrote in message om... I tried several cites and I finally found a no hassle free cite. If you are interested in seeing a really simple, fast, and SAFE single story 8' lift elevator capable of lifting 300 pounds in 10 seconds, go to: http://community.webshots.com/script...bumID=96391689 Thanks for all of your suggestions and for your help. BoyntonStu |
#11
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$100 Homebuilt Elevator Photos Uploaded - Very Dangerous!
"Lane"
The elevator operates with the person facing the pipe (toes inward) and whose hand is on the momentary contact up/down switch. Yes, I will admit that at times I can feel my back brushing the top opening but the effect is so slight and the position is so far in the other direction as not to be any problem. Also, the speed is just 'right' as to be comfortable and controlable. The men and women who have ridden it have all been smiles. I bet that you would also like it if you tried it. As far as insurance goes, I would rather live my life than worry about what someone else thinks about what I do. If my wife likes it, that is good enough for me. She loves it, uses it many times a day, and brags about my invention to all of her friends. BTW I checked the regulations and it does not fall into any known category of elevator, man lift, or dumbwaiter. BoyntonStu lanenospam@copperaccentsdotcom wrote in message ... You wouldn't catch me on that thing. Does your insurance agent know about it? I'll bet not! What happens if someones foot isn't all the way on the platform as you go up through the opening. Off go the toes! Lane "Stu" wrote in message om... "AL" Me and so far, anyone else 300lb or less. BoyntonStu wrote in message news:tRlmb.21648$e01.44641@attbi_s02... Interesting. But what do you carry on it? A person? "Stu" wrote in message om... I tried several cites and I finally found a no hassle free cite. If you are interested in seeing a really simple, fast, and SAFE single story 8' lift elevator capable of lifting 300 pounds in 10 seconds, go to: http://community.webshots.com/script...bumID=96391689 Thanks for all of your suggestions and for your help. BoyntonStu |
#12
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$100 Homebuilt Elevator Photos Uploaded - No hassle viewing
BEAR
Good comments. I will address them one by one. 1. the "5/16" bolts" that are being loaded improperly are far more likely to break without warning than the cable. There a 4 - 5/16" bolts in tension. Compare their combined (or even individual) strength to a 3/16" cable and there is no comparison. I consider the cable as dental floss or clothes line because of the brake safety. The pipe just ain't going to break, nor will the 2 layers of plywood, the upper flange and threads, etc. It all comes down to the brake and the platform. The soft metal leaves are virgin until they are first used. Until then they will brake 900 pounds according to the manufacturer. Chinese or UD, there is enough steel "meat" to support several hundred pounds without losing sleep. The cantilever platform is supported by 2 pieces of bed frame angle iron 1x1. Again, four 5/16" bolts that you mistrust to anchor the platform to the lower 1-1/2" pipe flange. I use 2" castor wheels that slightly roll against the wall to prevent torquing. They are beginning to mark the wall ever so slightly. I will pain the wall and install anodized aluminum 'wall tracks'. I conducted a string test whereby I substituted a string for a chain link and cut it to test the brake. No problem. I weigh 180 and my 300 lb friend tested it. Perhaps a 400 pound test would be better, I also intend to mount empty coke cans beneath the platform as a last ditch crush shock absorber. 8 feet will hurt but most likely never kill a feet first fall. BTW I flew a 1,000 lb gyrocopter and trusted a single 5/16 bolt holding the rotor and shear stressed. Thanks for your input and comments. They were well thought out. BoyntonStu wrote in message ... The mechanism is the 3/4" pipe clamp sandwiched between the 1-1/2" floor flanges. The chain rides up the 5/16" bolts and off-loads the spring loaded brake. Should the cable break, the brake instantly comes on and nothing falls or slides down. Now this is a clever idea... but two things come immediately to mind: 1. the "5/16" bolts" that are being loaded improperly are far more likely to break without warning than the cable. (dynamic load vs. static - also stress) 2. the "brake" is a clever application of a pipe clamp, BUT the thing will work IF nothing interferes with the little pipe clamp's lever, and the spring doesn't fail. Not failsafe. I wouldn't want to trust my life or limb to the soft metal leaves in a typical pipe clamp. It's not a bad idea, but I'd look around for a commercial brake that happens to also be failsafe and concentric around a pipe or rod, and either buy one or copy it. The concept is right - its the same one used in commercial elevators - if the load is removed, the brake engages. But the implementation here is very, very tenuous. (not to mention the questionable strength of the casting - is it Chinese?) Also, I don't know what you did to cantilever out the wood platform, but it had better be really well done, and without flaws - hopefully welded or using real steel hardware, not stuff like that "5/16" bolt arrangement. Then too, you need something to permit the platform to have a bearing surface for the rotational forces - looks like ur using the wall now. Try a strip of sheet steel and a roller or fixed wheel mounted on two sides - or something more formal... This might be ok for freight, but not people as it now stands. But it has *potential*... Oh, don't lean your toes over the edge going up... (good place for a reversing switch??) _-_-bear Bob Engelhardt wrote: Stu wrote: ... http://community.webshots.com/script...bumID=96391689 ... The site doesn't like this full URL. Try http://community.webshots.com/, then search for user "boyntonstu". |
#13
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$100 Homebuilt Elevator Photos Uploaded - Very Dangerous!
In article , Stu says...
As far as insurance goes, I would rather live my life than worry about what someone else thinks about what I do. This is fine until the day that somebody sues you. Then all of a sudden, you will care a *lot* about what that insurance company man thinks. Jim ================================================== please reply to: JRR(zero) at yktvmv (dot) vnet (dot) ibm (dot) com ================================================== |
#14
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$100 Homebuilt Elevator Photos Uploaded - No hassle viewing
Stu wrote: BEAR Good comments. I will address them one by one. 1. the "5/16" bolts" that are being loaded improperly are far more likely to break without warning than the cable. There a 4 - 5/16" bolts in tension. Compare their combined (or even individual) strength to a 3/16" cable and there is no comparison. I consider the cable as dental floss or clothes line because of the brake safety. The pipe just ain't going to break, nor will the 2 layers of plywood, the upper flange and threads, etc. It all comes down to the brake and the platform. What will break and what will not break "ain't so simple." Stress cracks & failures are not simple to anticipate and things that look or intuitively appear to be "break proof" have in many instances (like airplanes, etc...) proven to be quite capable of breaking. Threads in soft bolts can literally *extrude* off... what grade bolts are these? What about those "flanges" that they sit in?? A THOUSAND rides later - things change! Forces off axis can break bolts that work fine in situations where there is no off axis force. The soft metal leaves are virgin until they are first used. Until then they will brake 900 pounds according to the manufacturer. Chinese or UD, there is enough steel "meat" to support several hundred pounds without losing sleep. Dynamic load & static loads are not equivalent. The cantilever platform is supported by 2 pieces of bed frame angle iron 1x1. Connected to what and how? Again, four 5/16" bolts that you mistrust to anchor the platform to the lower 1-1/2" pipe flange. I use 2" castor wheels that slightly roll against the wall to prevent torquing. They are beginning to mark the wall ever so slightly. I will pain the wall and install anodized aluminum 'wall tracks'. I conducted a string test whereby I substituted a string for a chain link and cut it to test the brake. No problem. I weigh 180 and my 300 lb friend tested it. Perhaps a 400 pound test would be better, I also intend to mount empty coke cans beneath the platform as a last ditch crush shock absorber. 8 feet will hurt but most likely never kill a feet first fall. Maybe. Maybe you'll just brake and arm or leg, or crush some vertebrae? Better to be 200% failsafe, eh? BTW I flew a 1,000 lb gyrocopter and trusted a single 5/16 bolt holding the rotor and shear stressed. You are brave & lucky, eh? Others might characterize it differently... ' - ) _-_-bear Thanks for your input and comments. They were well thought out. BoyntonStu |
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