Question about ships' ladders...
Jeff Zeitlin
(28 Jun 2022 23:25 UTC)
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Re: [TML] Question about ships' ladders...
greg caires
(28 Jun 2022 23:34 UTC)
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Re: [TML] Question about ships' ladders...
Jim Vassilakos
(29 Jun 2022 00:44 UTC)
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Re: [TML] Question about ships' ladders...
Timothy Collinson
(01 Jul 2022 19:41 UTC)
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Re: [TML] Question about ships' ladders...
kaladorn@xxxxxx
(08 Jul 2022 06:56 UTC)
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Re: [TML] Question about ships' ladders... Rupert Boleyn (08 Jul 2022 10:53 UTC)
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Re: [TML] Question about ships' ladders...
kaladorn@xxxxxx
(09 Jul 2022 04:34 UTC)
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Re: [TML] Question about ships' ladders...
Richard Aiken
(09 Jul 2022 12:02 UTC)
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On 08Jul2022 1855, kaladorn at gmail.com (via tml list) wrote: > Here's another thought from the 1930s and before: My grandfather worked in > a multi-story woolen mill. They had massive hydro resources so they had a > drive shaft that fed many systems (probably several) and one of those > systems was for getting between levels. Here's how it worked: > > Imagine a drive pulley at the bottom in the underfloor on the first (or > maybe basement) level. There's another pulley on the ceiling of the top > level. Between these runs one massive belt. It was a massive leather belt > with layers and cross stitching/lashing if I recall. > > How does that get you up and down? > > Every 2.5 m or so, there was an attachment riveted into the belt. That belt > held a chunk of 5cmx15cm hardwood (I think that's about the size) about > 30-36 cm perpendicular to the belt. The belt moved in one direction at a > single speed all the time (barring shutdowns for some cause). So there were > always steps moving up and steps on the other side coming down. At about > the 2.1 m height from the step, a loop hung from the belt. > > Say you had 3 stories of 4m and a basement of 4m for a total of 16m (so > roughly a 32m belt with 6 stairs with loop going up, 6 stairs coming down > with loop. > > A worker would walk to the entry point on their level and watch carefully > as the belt moved. It didn't move so fast you were likely to miss your > step. You grabbed the loop with one hand as a holding strap for balance and > stepped onto the step. You could be going up or down. When you started to > pass a level's exit, you watched and stepped off onto that level. > > Now, I never saw it, but it worked for many workers for at least 7 decades. > My grandfather ended up as the superintendent when the Germans bought it in > the mid 1960s. These were a continuous belt lift - no stopping like in > elevators if you hit the emerg stop button. I've used something similar in my campaign. A space station or large ship has a central tube, or pair of tubes (one for 'up', the other for 'down') in zero-g, and a looped cable with handholds spaced along it. It runs continuously and you just enter the tube and grab on, letting go and gabbing a handrail at your desired deck. Like a ski-tow, really. The impatient types forgo the tow and 'free-fly' down the tubes, which is fine and dandy until they hit someone on the tow and everyone goes tumbling. -- Rupert Boleyn <xxxxxx@gmail.com>