...A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium. The load is attached to the hoist by means of a lifting hook. Read full entry
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- 1.Hoist (device) - Wikipedia, the free encyclopedia
- Hoist (device) From Wikipedia, the free encyclopedia. Jump to: navigation, search ... A hoist is a device used for lifting or lowering a load by means of a drum or ...
- http://en.wikipedia.org/wiki/H
oist_(device)
- 2.hoist: Definition, Synonyms from Answers.com
- hoist v. , hoisted , hoisting , hoists . v.tr. To raise or haul up with or as ... A hoist is a device used for lifting or lowering a load by means of a drum or ...
- http://www.answers.com/topic/h
oist
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is there a device that can i have seen them on those
rentable climbing walls at
events and fairs. you just
hook the rope up to your
harness and climb. if the
person falls it lets them down
slowly.
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Autobelayers, Red Point (an autobelay company) just recalled thousands of them due to a brake failure because of bad bearings. Heres the recall link: http://www.recalls.gov.au/cont ent/index.phtml/itemId/969702 |
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What's your best 'hoist on 'hoist on your own petard':
Injured by the very device
that you intended to use to
injure others.
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Why did you ask this question in the philosophy section? In philosophy, the greatest example is John Locke. Though it was long after his death, he's been hoist upon his own petard of political philosophy. Nonetheless, the wounds don't appear to be fatal. Most philosophers are eventually hoist upon there own petards. This is the ironic aspect of philosophy when you're a great thinker in this arena. |
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Want up-down counter with The reqmt. is for heavy duty
crane in a steel plant.The
hoists in a carne are eqquiped
with limit switches to cut-off
the motion at a preset
height.This is a safety reqmt.
since, if the hoist moves up
uncontrolled with a load(in
our case liquid metal) it will
go to the top most point and
the wire rope will break
eventually. Thus reliability
of the system has to be
utmost.
We want supplier who can takup
design and supply of an
up-down counter based on the
inputs from a proximity switch
placed near the wire rope drum
on top of crane and
forward/backward pulses from
the electric motor. The
counter will be reqd. to give
an output to trip the motor
when a preset count is
arrived.
The initial reqmt. is 30/35
nos after trial and approval
of initial piece.But there is
every chance of increased
order once the product becomes
succesful.
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An Allen Bradley SLC 500 with combination digital Input Output card will do it with no problem. It has the Count Up (CTU) function that will count the various Input(s) and will trigger a done (DN) bit when the count value(s) become true. This setup will cost less than $900 and an additional 800 to 1200 for Panel View Display. You may want to investigate AB Pico Controllers which come equipped with text display this may be cheaper |
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