Pianotech

  • 1.  Haines Bros repetition spring

    Registered Piano Technician
    Posted 01-12-2020 13:31
    Does anyone have a source for the unusual Haines Bros. repetition springs? 

    This small grand from 1931 has a very unusual action.  The rep spring is firmly attached to the jack, and the spring acts as the rep lever.  The hammer flange has a drop button with action cloth to contact the spring, and the shank has a butt more like an upright with a notch to contact the spring between the drop button and "knuckle".  

    I need to regulate the action, but a few springs are already missing, and I'm afraid I'll break more if I adjust them.  

    Many photos attached.

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    Greg Graham, RPT
    Brodheadsville, PA
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  • 2.  RE: Haines Bros repetition spring

    Posted 01-12-2020 14:56
    Contact The Instrument Workshop to get the phosphor-bronze wire to make the springs. Measure current diameter for ordering.

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    Regards,

    Jon Page
    mailto:jonpage@pianocapecod.com
    http://www.pianocapecod.com
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    Original Message


  • 3.  RE: Haines Bros repetition spring

    Registered Piano Technician
    Posted 01-13-2020 17:07
    I measured note 88 as 0.032, and it has a yellow color, likely phosphor bronze.  But, I didn't think to measure elsewhere along the scale.  I hope they didn't taper spring size bass to treble like more common rep springs often do.  


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    Greg Graham, RPT
    Brodheadsville, PA
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    Original Message


  • 4.  RE: Haines Bros repetition spring

    Registered Piano Technician
    Posted 01-12-2020 23:33
      |   view attached
    I made one on site with .029"  wire, #12. Tricky but easier with a jig. 

    Gary Bruce
    Registered Piano Technician



    Original Message


  • 5.  RE: Haines Bros repetition spring

    Registered Piano Technician
    Posted 01-13-2020 15:21
    A pair of bending pliers like these, with round and concave jaw surfaces, works well for this kind of fabrication. It holds the wire while you pull it around the round jaw as needed, and allows for different degrees of bend.

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    Fred Sturm
    University of New Mexico
    fssturm@unm.edu
    http://fredsturm.net
    http://www.artoftuning.com
    "We either make ourselves happy or miserable. The amount of work is the same." - Carlos Casteneda
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    Original Message