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OT question about springs


 
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Britcheflee
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Joined: 20 Aug 2007
Posts: 1583
Location: Placerville California

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PostPosted: Mon Feb 25, 2013 7:32 am    Post subject: OT question about springs Reply to specific post Reply with quote

My Brother in law is a chiropractor - they use a spring loaded device called an Activator which is placed on the spine usually and you pull a trigger which causes it to 'click' and impact the joints to loosen them up - he has a number of them which were not working - gave them to me to mess with to see if I can get them going - they have a simple method of working but took me a while to figure that out - so far have fixed 3 for him.
The latest one I got has a spring which has snapped - obtaining a new spring from the company which makes the activators will be expensive.
The spring is about 1 1/2 inches long, has a diameter of about 3/4 inch and has fairly loose coils - it must be made of a strong metal as even so it has a fairly strong pressure.
The spring looks fairly common - is there a way to get a new one by counting coils, length, width etc? There are so many out there must be a way to id them?


Lee
 
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TheOldHokie
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Joined: 08 Apr 2005
Posts: 7089
Location: Myersville, MD

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PostPosted: Mon Feb 25, 2013 8:04 am    Post subject: Re: OT question about springs Reply to specific post Reply with quote

Britcheflee wrote:
(quoted from post at 11:32:20 02/25/13) My Brother in law is a chiropractor - they use a spring loaded device called an Activator which is placed on the spine usually and you pull a trigger which causes it to 'click' and impact the joints to loosen them up - he has a number of them which were not working - gave them to me to mess with to see if I can get them going - they have a simple method of working but took me a while to figure that out - so far have fixed 3 for him.
The latest one I got has a spring which has snapped - obtaining a new spring from the company which makes the activators will be expensive.
The spring is about 1 1/2 inches long, has a diameter of about 3/4 inch and has fairly loose coils - it must be made of a strong metal as even so it has a fairly strong pressure.
The spring looks fairly common - is there a way to get a new one by counting coils, length, width etc? There are so many out there must be a way to id them?


Lee


It's a medical device - buy it from a medical supplier.

TOH
 
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souNdguy
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Joined: 20 Aug 2002
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PostPosted: Mon Feb 25, 2013 11:04 am    Post subject: Re: OT question about springs Reply to specific post Reply with quote

ditto what TOH said... it's medial. repalce with exact part.. otherwise I see a liability claim.

IE.. patient clams injury ( paralysis? / pain ) form malfunctioning device..e tc.
 
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Good one..John,PA
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PostPosted: Mon Feb 25, 2013 2:16 pm    Post subject: Re: OT question about springs Reply to specific post Reply with quote

My office gal called her doc. complaining of some leg pain. I took her there for the appointment. He precribed morfine for PAIN.

2 days later, I took her to the ER at the local hospital. The summation was first: blood clot in the right leg.

So moral to the story: The medical staff was ready to write-up the doc. for negligance.

Becareful of Proffessional Mal Practice between the Professionals!

Later the diagonisis was pneumonia. She is on sick leave for the past 2 weeks.

John,PA
 
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Mike Groom
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Joined: 07 Mar 2008
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PostPosted: Mon Feb 25, 2013 7:05 pm    Post subject: Re: OT question about springs Reply to specific post Reply with quote

Spring rate is determined by the diameter of the wire and the diameter of the coil and the length.You can mic. the dia. of the wire and the diameter of the coil and count the # of coils and come real close to the proper spring rate on any spring.
 
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ScoutB
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Joined: 28 Jul 2012
Posts: 295
Location: Ada, MI

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PostPosted: Mon Feb 25, 2013 7:51 pm    Post subject: Re: OT question about springs Reply to specific post Reply with quote


Everything you ever wanted to know about springs (and lots of stuff you didn't want to know) can be found at http://85.185.231.196/mekanik/Electromechanical.Design.Handbook/comprehensive%20spring%20design.pdf
 
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Britcheflee
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Joined: 20 Aug 2007
Posts: 1583
Location: Placerville California

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PostPosted: Tue Feb 26, 2013 8:02 am    Post subject: Re: OT question about springs Reply to specific post Reply with quote

Mike Groom wrote:
(quoted from post at 20:05:38 02/25/13) Spring rate is determined by the diameter of the wire and the diameter of the coil and the length.You can mic. the dia. of the wire and the diameter of the coil and count the # of coils and come real close to the proper spring rate on any spring.



thanks, this spring merely returns the finger pull handle back to its original position - you pull up on it until the main spring inside is released then this spring just pushes the handle back down - my father in law found one real close in the napa store - came from a carb kit for $2!
Lee
 
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