Pulley hanger, IBM master clock

Discussion in 'Electric Horology' started by Kevin W., Feb 26, 2019.

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  1. Kevin W.

    Kevin W. Registered User
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    Apr 11, 2002
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    I work at the Veritas Tools machine shop.
    Nepean, Ontario, Canada
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    maybe someone will know. Hoping. This is the pulley hanger assembly from the left side of my IBM model 35 master clock. This came apart quickly and the parts fell on the floor, ball bearing and spring. Does anyone know how they go together properly, i have a idea as to how but its difficult to assemble. Maybe someone knows a trick to assemble this.

    50261149_10156055533087913_2946531166317969408_n.jpg 50314635_10156055525027913_8492859612326789120_n.jpg
     
  2. John Lippold

    John Lippold Registered User
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    Feb 2, 2011
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    Hi Kevin, here is a rough sketch of how the parts are assembled. There is no coil spring shown in the parts catalog nor have I ever seen one in the pulley mounting assembles.

    Pulley-02.jpg Pulley-03.jpg
     
  3. Scot Traffis

    Scot Traffis Registered User
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    Apr 8, 2011
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    electical tech
    parma oh
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    just looked at my clock, couldn't find the coil spring. It's put together just like the drawing
     
  4. Kevin W.

    Kevin W. Registered User
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    Apr 11, 2002
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    I work at the Veritas Tools machine shop.
    Nepean, Ontario, Canada
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    Thank you John and Scott. I am very pleased to see my question answered. I am wondering though where the spring may have come from. Thanks to both of you. I hope perhaps you may be able to help me in the future with more questions about this clock.
     
  5. Kevin W.

    Kevin W. Registered User
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    Apr 11, 2002
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    I work at the Veritas Tools machine shop.
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    John and Scott, one more question. Would you know if both pullies would be the same way made with the ball bearing? Thanks.
     
  6. Jim Hartog

    Jim Hartog Registered User
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    Jan 6, 2010
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    Hello Kevin,

    Both pulleys are the same. The ball bearing acts as a ball-in-a-socket joint to give the pulley some flexibility. The pulley needs to move a little as the cable moves on the drum.

    Jim
     
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  7. Kevin W.

    Kevin W. Registered User
    NAWCC Member

    Apr 11, 2002
    21,440
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    I work at the Veritas Tools machine shop.
    Nepean, Ontario, Canada
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    Thanks Jim, that confirms i need to look for the other ball bearing that fell on my shop floor. Thanks too for the email too, very helpful.
     

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