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Thread: Ibm 35-7

  1. #16
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: harold bain)

    Thanks Harold so can i f go with being built in the late 1930,s for the clock.
    Also there is a 110 volt junction box at the top of the case. I was thinking of installing a switch so i could control it. Once the plug is plugged into the outlet does the clock wind automatically when the weights go to the bottom.
    Any thoughts on what SF mean, part of serial number.
    Thanks.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  2. #17
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    Default Re: Ibm 35-7 (By: Kevin W.)

    Hello Kevin,

    The weights do not make it to the bottom. The limit switches are set up so that it rewinds after about a foot of weight drop. That way the weights never get near the bottom and therefore have a few days of reserve power should the hydro go off.

    My serial number is 7394 and I was told it was 1953. I'm going to totally guess that your SF may have something to do with the case style.

    To rate the clock, a single 360 degree rotation of the bob (it is threaded at the top) changes the time 1 second per hour. The nut at the bottom does not hold up the bob. It is an independent fine tuning mechanism. On complete rotation of the nut equals 1 second per 5 days.

    I put a radio controlled (atomic time signal) quartz clock near my C 35 so that I could spend forever trying to get it real close. Start with the bob, then go to the nut. Have fun.

    Jim

  3. #18
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: Jim Hartog)

    Thanks Jim for the good information. I am really excited, can,t wait to see it going again. I have a couple of the radio controlled clocks, one in my livingroom.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  4. #19
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: Kevin W.)

    The clock is on the wall now. Weights are on the cables. The cables are where they should be. I have tried with the bob on and off and cant seem to get it lined up to put onto the suspension spring. Are there any tips or tricks to do this. Can i remove the bob and put the bob back on after i have the rod installed to the suspension spring.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  5. #20
    Forums Administrator harold bain's Avatar
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    Default Re: Ibm 35-7 (By: Kevin W.)

    You won't have any room at the bottom of the case to put the bob back on. Take off the dial and maybe you will be able to see what you are doing, Kevin.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  6. #21
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: harold bain)

    Thanks Harold. I had the dial off. After many attempts i gave up, and removed the movement. Now the movement is back in, and i am putting the weights back in. I learned, the hard way, dont put the weights on when movement is not in the case. The cable started to unwind from the drum. Now both sides are not at the same height. Going to put the weights on and watch closely what happens, hope they rewind evenly .
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  7. #22
    Forums Administrator harold bain's Avatar
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    Default Re: Ibm 35-7 (By: Kevin W.)

    There is a lock for the weights. Find it and remember to use it next time.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  8. #23
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: harold bain)

    Thanks Harold, did not know about the lock.
    It rewound the lowest weight first, then when they were at the same height, both rewound and motor shut off, so relieved i did not mess it up. Its running now, a bit out of beat, want to leave it for a while then adjust the beat with the adjuster at the top of the movement. I sure learned a lot today about these clocks. And i can see why Harold likes them so much.

    Forgot to mention, i was very glad both keys were taped to the case.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  9. #24
    Forums Administrator harold bain's Avatar
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    Default Re: Ibm 35-7

    I remember when I worked at Simplex, my service manager (who was a former IBM repairman) was working on a 35 master in the field. Not sure exactly what he did, but the result was the clock didn't stop winding at fully wound (must have bypassed or misadjusted the fan gear) and the weights snapped and dropped through the bottom of the case. He ended up with that clock as a trade in for a new electronic Simplex clock.
    These clocks are at the height of IBM's design technology, and will outlast most other clocks without a lot of maintenance. But, do oil the pivots Kevin, and if you decide to take the movement apart, be aware that there are ball bearings in the movement that need greasing, and will scatter to the 4 corners if you don't expect them to fall out.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  10. #25
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: harold bain)

    Thanks for the heads up on the ball bearings, did not know that, the movements are very well made, thick plates. I would be very sad if the weights broke the bottom of my case.

    I re oiled the pivots today, as i had it out of the case. There is a cam type thing on the left side , it pushes a switch every so often, is that something to do with slave clocks.
    Also when it wound the weights , the motor did not make much noise, also very smooth too.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  11. #26
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    Default Re: Ibm 35-7 (By: Kevin W.)

    You should have a few contacts that are related to running slave clocks, Kevin. If winding is quiet, it indicates that the winding system has been well greased and oiled.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  12. #27
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: harold bain)

    That must be what the contact switches are for, i know the past owner had it hooked up to slave clocks. Someone told me the rubber mounts on the motor would be worn and make it noisey, which it is not. Glad about that. Right now still setting the beat. As i was close and it stopped a few times.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  13. #28
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: Kevin W.)

    I was told today that these clocks should rewind the weights every 24 hours. I thought they re wind after a week.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

  14. #29
    Forums Administrator harold bain's Avatar
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    Default Re: Ibm 35-7 (By: Kevin W.)

    Usually about once a day, Kevin. Leaves more reserve time if there is a power outage.
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  15. #30
    Registered user. Kevin W.'s Avatar
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    Default Re: Ibm 35-7 (By: harold bain)

    Its been running almost a day has not rewound yet. I will keep a eye on it. Thanks again Harold.
    One clock at a time. Kevin West
    http://www.global-horology.com/GHMB/

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