• Welcome to ScubaBoard


  1. Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.

    Benefits of registering include

    • Ability to post and comment on topics and discussions.
    • A Free photo gallery to share your dive photos with the world.
    • You can make this box go away

    Joining is quick and easy. Login or Register now by clicking on the button

What's this for? Mistral related

Discussion in 'Vintage Diving & Equipment' started by Ghetto Diver, Oct 15, 2017.

  1. Ghetto Diver

    Ghetto Diver Solo Diver

    # of Dives: I just don't log dives
    Location: Beerfield Beach, FL
    624
    300
    63
    Aquired a Mistral [W Pico] and have it prepped for assembly.
    Under one clamp I find this.

    20171015_141751.jpg
     
  2. herman

    herman Divemaster

    # of Dives: 500 - 999
    Location: Raleigh,North Carolina
    9,673
    2,430
    113
    I think it was to prevent the clamp from pinching the hose and creating a gap that could leak. The later clamps had a tab that did the same thing.
     
  3. Ghetto Diver

    Ghetto Diver Solo Diver

    # of Dives: I just don't log dives
    Location: Beerfield Beach, FL
    624
    300
    63
    Thanks Herman. Have another set from DAAM.
    Makes sense now
    20171015_151437.jpg
     
    John C. Ratliff likes this.
  4. Sam Miller III

    Sam Miller III Scuba Legend Scuba Legend

    # of Dives: 5,000 - ∞
    Location: CALIFORNIA: Where recreational diving began!
    5,066
    3,916
    113
    It was common practice to tape the hose horns and or install a small rubber shim to insure at tight fit and minimum leaking.

    You have a shim

    SDM
     
    John C. Ratliff likes this.
  5. herman

    herman Divemaster

    # of Dives: 500 - 999
    Location: Raleigh,North Carolina
    9,673
    2,430
    113
    It's not rubber Sam, it's copper/brass. I have found a few of them and it appears to be installed by USD.
     
  6. John C. Ratliff

    John C. Ratliff Instructor, Scuba

    # of Dives: I'm a Fish!
    Location: Beaverton, Oregon
    2,894
    1,525
    113
    When the hoses were new, with that old clamp it was possible to pinch the hose and cause a small open channel for air to leak out of, or water to get in. The small metal (copper?) shim was used to keep the clamp from pinching the hose. The later clamps shown above incorporated the concept into the clamp design.

    SeaRat
     
  7. Sam Miller III

    Sam Miller III Scuba Legend Scuba Legend

    # of Dives: 5,000 - ∞
    Location: CALIFORNIA: Where recreational diving began!
    5,066
    3,916
    113
    @SeaRat
    John,
    After a good night's sleep I agree it was a shim and the later hose clamps incorporated a shim...

    However, In all the many years I was associated with US Divers and all the US Diver regulators I have owned and used and all the 8 hours a day 5days a week 40 hour US Diver company regulator repair courses I attended -- I do not recall seeing a brass shim in the US Diver classes ,inventory or repair manuals -- and I have a stack of them.

    Now early on - in those golden years- we often taped the regulator horns...and at this late date in life I can't exactly recall why? But I suspect t was for a better purchased and watertight fit-- I do know that we always immediately replaced the factory tennamen (S) and later plastic hose clamps with WW 11 aircraft grade (guaranteed to rust ) surplus hose clamps

    I question if the shim was a temporary modification when B&B was on strike for about a year and all those bright shinny cans were imported from Spiro ? The Spiro cans would have possibly had a slightly different OD based on European measurements which would have been compensated with a shim.

    I ever so briefly chatted about these shims with my son, Dr. Sam IV who also competed to US Diver 40 hour regulator repair course and he also was baffled - didn't recall seeing them in his course so many years ago, which was prior to the B&B strike.

    Perhaps the OP @Ghetto Diver can provide additional pictures of the regulator cans ? Just might provide some hint or an answer.

    Sam Miller. III
     
    Ghetto Diver likes this.
  8. Bryan@Vintage Double Hose

    Bryan@Vintage Double Hose Instructor, Scuba

    678
    854
    93
    Copper shims were common as were black plastic ones. I can only remember seeing them on regulators with yellow hoses though.
     

    Attached Files:

  9. Sam Miller III

    Sam Miller III Scuba Legend Scuba Legend

    # of Dives: 5,000 - ∞
    Location: CALIFORNIA: Where recreational diving began!
    5,066
    3,916
    113
    Something that was over looked and tossed immediately

    But how about the subject of the thread--- the round brass shim ? Catalog number ? Year(s) installed ?

    SDM
     
    Last edited: Oct 16, 2017
  10. Ghetto Diver

    Ghetto Diver Solo Diver

    # of Dives: I just don't log dives
    Location: Beerfield Beach, FL
    624
    300
    63
    Sam
    Some photos of the cans
    20171016_163952.jpg 20171016_163946.jpg


    Assuming the mark on the hose was USD #?
    20171016_164108.jpg

    Never would have thought that that little piece of copper would flush out the SB vintage dream team.
    Thanks for the replies and insight.
     

Share This Page