[PSUBS-MAILIST] Drop weight

james cottrell via Personal_Submersibles personal_submersibles at psubs.org
Wed Sep 13 19:53:13 EDT 2017


Brian,
This is a link to the company that supplied the galvanic timers for the Deep Sea Challenger. I'm sure they be happy to give you some specs-
Galvanic Timed Releases - International Fishing Devices


  
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Galvanic Timed Releases - International Fishing Devices
 For over 40 years, International Fishing Devices, Inc. has been the designers and manufacturers of Galvanic Time...  |   |

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Greg Cottrell

      From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Wednesday, September 13, 2017 7:26 PM
 Subject: Re: [PSUBS-MAILIST] Drop weight
   
Interesting,  They don't really give any specs on the amount of weight it can carry though. Brian

--- personal_submersibles at psubs.org wrote:

From: james cottrell via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Drop weight
Date: Wed, 13 Sep 2017 22:42:53 +0000 (UTC)

You can buy them off the shelf here-
http://www.lfsmarineoutdoor.com/time-releases-galvanized-1-7-day.html?gclid=EAIaIQobChMInv3llJ2j1gIVjFqGCh3nCwZrEAQYASABEgI28PD_BwE

You can also use something called a "burn wire" that burns through when current is applied.
Greg Cottrell

      From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Wednesday, September 13, 2017 11:07 AM
 Subject: Re: [PSUBS-MAILIST] Drop weight
  
Greg ,                Do you happen to know the make up of the corrosion mechanism that was used?   Brian

--- personal_submersibles at psubs.org wrote:

From: james cottrell via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Drop weight
Date: Wed, 13 Sep 2017 00:36:53 +0000 (UTC)

Brian,
Corrosion triggered weight release was one of the safety features incorporated into James Cameron's sub Deep Sea Challenger.
Greg

      From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
 To: PSubs <personal_submersibles at psubs.org> 
 Sent: Tuesday, September 12, 2017 8:10 PM
 Subject: [PSUBS-MAILIST] Drop weight
  
Hi All,              I had an idea for an emergency drop weight, and it would also work for a depth testing function.   Basically it would be a corrosion triggered release.  Every time you go on a planned dive you insert a anode type material  ( a bi-metal corrosion bolt) which would be scheduled to corrode out in what ever time frame you want.  So in addition to your regular drop weight you would also have this back up device designed to disintegrate at a calculated time.  I know it would work in salt water , for fresh water you may have to use some kind of different materials.  I have a friend who's father use to do some studies for Scripps and the devised some fish traps that would float to the surface after a certain time period. Brian_______________________________________________
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