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re: how does a dumbwaiter work?
25 nov 1997
andy holyer wrote re:
>...a dumbwaiter between the kitchen (in the basement)
>and the dining room (immediately above).
how hard can this be? you might use a 2' diameter cable reel...
x p p's are pulleys...
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| | | w is a counterweight, about twice the empty weight
| | | of the platform
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\p/ |
w |
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-------
| raised position ---
------- ---
.
. ~30"
.
--------------------------dining room floor ~8'
.
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-------
| lowered position ---
------- ---
~30"
--------------------------kitchen floor
as the platform goes up 8', the weight descends 4'. the rope might
have a couple of loops to slip over hooks on the wall to keep the
platform from moving, if friction is insufficient.
>...a powered solution feels like overkill.
you might use an inexpensive electric winch, or a windshield wiper motor
with a couple of limit switches...
nick
nicholson l. pine system design and consulting
pine associates, ltd. (610) 489-0545
821 collegeville road fax: (610) 489-7057
collegeville, pa 19426 email: nick@ece.vill.edu
computer simulation and modeling. high performance, low cost, solar heating and
cogeneration system design. bsee, msee. senior member, ieee. registered us
patent agent. solar closet paper: http://leia.ursinus.edu/~physics/solar.html
web site: http://www.ece.vill.edu/~nick
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