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Thread: Ibm 35-7

  1. #31
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: Kevin W.)

    Hello again. Yesterday i went to losen the collar that is on the pendulum rod, when i went to tighten the screw it broke, so i managed to remove the screw but cant find a replacement yet. The bob is threaded to the rod. So am i correct that the screw has to be in place and tight so i can regulate it. I tried to turn the spoked nut and it wont move bob up or down.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  2. #32
    Forums Administrator harold bain's Avatar
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    Default Re: Ibm 35-7 (By: Kevin W.)

    It shouldn't make any difference at all, since the collar is at the top. If you had the pendulum apart, it will take a while to zone in on any accuracy
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  3. #33
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7

    I put a mark on the rod with a felt tip marker, i will try it again, it was running a bit fast.

    I am a bit confused, i just went to lower the bottom nut adjuster, bob would not come down, so tried to lower bob by turning it, and it lowered by turning the bob. I gave it about 3 turns.
    Last edited by Kevin W.; 05-13-2017 at 07:45 PM.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  4. #34
    Forums Administrator harold bain's Avatar
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    Default Re: Ibm 35-7 (By: Kevin W.)

    You will get used to it, Kevin. The collar is to make sure it won't turn on its own while in use. The bob is threaded.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  5. #35
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: harold bain)

    So that is right, you turn the bob and just use the adjuster to keep bob in place. Thanks. I will get a screw in the collar later. Would you know what thread the screw is.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  6. #36
    Forums Administrator harold bain's Avatar
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    Default Re: Ibm 35-7 (By: Kevin W.)

    No, but it should be reasonably common, and not metric.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  7. #37
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: harold bain)

    Thanks Harold, i went to a fasteners store here and found its smaller than a no 4-40 tpi. maybe a hobby store might have it.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  8. #38
    Forums Administrator harold bain's Avatar
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    Default Re: Ibm 35-7 (By: Kevin W.)

    For regulating the clock, turning the spoke nut 1 turn is 1 second in 5 days, and turning it 1 spoke (1/4 turn of spoke nut) is 1 second in 20 days.
    Turning it 1 bob is 1 second per hour, and 1/4 bob is 6 seconds per day.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  9. #39
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7

    Thanks Harold, i am putting that info in my notes, so i will refer to them, i have the atomic clock near by.
    How often should i check time and regulate, maybe twice a week.
    One clock at a time. Kevin West
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  10. #40
    Forums Administrator harold bain's Avatar
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    Default Re: Ibm 35-7 (By: Kevin W.)

    I only check mine about once a month.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  11. #41
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: harold bain)

    Thanks Harold, its 20 seconds fast this morning. Once i get it closer i wont touch it for a month.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  12. #42
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    Default Re: Ibm 35-7 (By: Kevin W.)

    Hello Kevin,

    You'll never get exactly right. I run mine a bit on the fast side instead of the slow side. I can always get it right again by stopping the pendulum, waiting for the radio signal time to catch up and then start the pendulum up again. That's easier than trying to advance the hands on a slow clock to match radio time.

    Jim

  13. #43
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: Jim Hartog)

    Thanks Jim, long as i get it close, i would be happy, i get good time keeping from my Seth Thomas no 2, hope i can get this on the IBM, 30 seconds or better in a month i hope.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  14. #44
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    Default Re: Ibm 35-7 (By: Kevin W.)

    Great clocks, the serial number label is missing from mine, so I don't know how old it is. Not sure what kind of wood either. has a reddish hue.

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  15. #45
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: Steve Murphy)

    Very nice collection Steve, Do you have a favourite one.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

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