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  1. #1
    Ian Grant's Avatar
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    Help with my Bladder . . . . . . . .

    Should have said help with the bladder on my Thornton Pickard shutter which I've just restored.

    The bladder is inflated by a tube connected to a rubber bulb which inflates the bladder when sqeezed.

    The bladder now leaks, and is rock hard, it's not man made and appears to be organic in nature, most likely some part of an animal or fish.



    The bladder on the bottom right in the photo goes in the center of the shutter under the tab which it lifts and allows the shutter to fire as it's inflated. I need suggestions on how to make a new one, I've tried using a piece old bicycle inner tub but that not very practical.

    Apart from this the shutter is now working perfectly, despite being sold for parts on Ebay, the shutter cloth was badly creased had a multitude of pinholes, there was no cord to cock the shutter and the brass & woodwork tatty. I ironed the shutter after removing a flaking covering, re-blacked it with black acrylic paint and it's now totally light tight but flexible, it requires very little effort to re-cock the shutter. I still need to determine the exact shutter speeds, it has two options depending on how many turns of the spring are used to tension it, as well as T.

    I've fitted an early Ross symmetrical lens SN 2197, f8 - f64 approx 300m/12" which is marked as covering 8"x5"

    Ian

  2. #2
    Sirius Glass's Avatar
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    How about a bladder/bulb from a blood pressure machine?

    Steve
    Warning!! Handling a Hasselblad can be harmful to your financial well being!

    Nothing beats a great piece of glass!

    I leave the digital work for the urologists and proctologists.

  3. #3

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    How big does it need to be?
    http://en.wikipedia.org/wiki/Balloon_catheter

    There are similar industrial devices, but I can't think what they are called.

  4. #4
    Ian Grant's Avatar
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    Quote Originally Posted by Sirius Glass View Post
    How about a bladder/bulb from a blood pressure machine?
    Steve
    How big are they ? I have the hand bulb part, as I use one with a Packard shutter and also pneumatic cable releases.

    Quote Originally Posted by Greg_E View Post
    How big does it need to be?
    http://en.wikipedia.org/wiki/Balloon_catheter

    There are similar industrial devices, but I can't think what they are called.
    Those look ideal, it's roughly 2cm diameter.

    Ian

  5. #5

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    Some fountain pens have small bladders for holding the ink, might one of those work?

  6. #6
    Ian Grant's Avatar
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    Quote Originally Posted by bdial View Post
    Some fountain pens have small bladders for holding the ink, might one of those work?
    That's the kind of lateral thinking I need, I think they'll be a touch to small, they are tubular whereas the original & ideal shape is roughly circular. I'll have look anyway, thanks.

    Ian

  7. #7

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    How about a small finger cot. Roll it to just the size you need.

  8. #8
    Ian Grant's Avatar
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    What's a finger cot ? Where do you get them ?

    Ian

  9. #9

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    Quote Originally Posted by Ian Grant View Post
    What's a finger cot ? Where do you get them ?

    Ian
    A condom for your finger. They are used for medical exams, etc. They come in various sizes and are dirt cheap. You can afford to break them by the dozen.

  10. #10

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    Or,
    Maybe perfume atomizer balls?
    http://www.paradise-co.com/ballcaps/index.html

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