Ibm 35-7

Discussion in 'General Clock Discussions' started by Kevin W., May 4, 2017.

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  1. Kevin W.

    Kevin W. Registered User

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    I just bought a IBM 35-7 master clock. Is there a hard copy someplace i can buy with set up or operating instructions.
    I will post pictures when i receive the clock. It came out of the Kingston General Hospital, near Ottawa, Ontario.
     
  2. harold bain

    harold bain Forums Administrator
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    Kevin, you should be able to find what you need here on the message board with a search. Good luck.
     
  3. Kevin W.

    Kevin W. Registered User

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    Thanks Harold, i have done a fair bit of reading the last few days. They are amazing clocks, so very well built.
     
  4. Jim Hartog

    Jim Hartog Registered User
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    Hello Kevin,

    Google "IBM clock corner" and you will find some stuff put together by the IBM people because they were being inundated with clock questions. I saw your clock on Kijiji, I think.

    Jim
     
  5. Kevin W.

    Kevin W. Registered User

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    Thanks Jim i will do that. Its a clock that does not come up for sale often in my area.
     
  6. Kevin W.

    Kevin W. Registered User

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    I read the invar pendulum weighs 14 pounds and the weights i thought are 20 pounds each is that correct. Other than a mounting anchor in a stud any other considerations for mounting to a wall.
     
  7. harold bain

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    Yes, a lag bolt into a stud, and a good screw near the bottom, where you should see another hole. Keeps it level. That could be heavy for the weights, but if it is mercury pendulum, I think they were heavier. IBM weights are like no others, with those nuts on the top of them.
     
  8. Kevin W.

    Kevin W. Registered User

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    Thanks Harold, i have a stud detector i will get some practice using it.
    It is supposed to get here this afternoon, hope it comes in good shape.
     
  9. Jim Hartog

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    #9 Jim Hartog, May 6, 2017
    Last edited: May 6, 2017
    Hello Kevin,

    Mine has the 110 V junction box on the top of the case. I was able to run the wire down the back (1/2" space) and out through a round notch at the bottom to plug into the wall below the case. That way there is no wire visible on the side of the case.

    I have a large lag bolt at the top and a bent "T" bracket screwed to the bottom of the case and the wall to keep it plumb.

    Jim
     
  10. Kevin W.

    Kevin W. Registered User

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    Thanks Jim, good idea, near a outlet, need to keep that in mine for a location for the clock.
     
  11. Kevin W.

    Kevin W. Registered User

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    #11 Kevin W., May 6, 2017
    Last edited: May 6, 2017
    It arrived , its bigger than i thought 5 feet 9 inches long. I have a picture of my wife standing next to it. My buddy is coming over to help me install it in a few days.

    Both keys for both locks came with it, i really like it. My wife said it was too big for our house, i said, really and laughed.:excited:

    Serial number sf4251
     
  12. Jim Hartog

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    Hello Kevin,

    Your case is different than mine. I don't have the flange on the sides and my door locks have the key hole in the sides, not the front.

    I took the door off to hang it. That makes it a little lighter and I put it on a pedestal of some sort (wooden box, I think) so I could bolt it into the wall.

    Mine is from Malton, with a metal DND tag and a metal A. V. Roe tag. Think AVRO Arrow.

    [​IMG]

    Jim
     
  13. Kevin W.

    Kevin W. Registered User

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    Wow Jim i love your clock, great idea on the door too. Avro, as in Avro Arrow. You can,t get any more Canadian than that. Mine looks like they ut a hole in the wall and flush mounted it into the wall. Appreciate the help Jim.
     
  14. Kevin W.

    Kevin W. Registered User

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    Hello Harold or Jim, can you tell me about the serial number i posted, SF 4251. Thanks.
     
  15. harold bain

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    There is no database for Canadian made IBM pendulum master clocks, Kevin
     
  16. Kevin W.

    Kevin W. Registered User

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    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.
     
  17. Jim Hartog

    Jim Hartog Registered User
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    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
     
  18. Kevin W.

    Kevin W. Registered User

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    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.
     
  19. Kevin W.

    Kevin W. Registered User

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    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.
     
  20. harold bain

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    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.
     
  21. Kevin W.

    Kevin W. Registered User

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    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 .
     
  22. harold bain

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    There is a lock for the weights. Find it and remember to use it next time.
     
  23. Kevin W.

    Kevin W. Registered User

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    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.:coolsign:

    Forgot to mention, i was very glad both keys were taped to the case.
     
  24. harold bain

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    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.:whistle:
    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.
     
  25. Kevin W.

    Kevin W. Registered User

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    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.
     
  26. harold bain

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    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.
     
  27. Kevin W.

    Kevin W. Registered User

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    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.
     
  28. Kevin W.

    Kevin W. Registered User

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    I was told today that these clocks should rewind the weights every 24 hours. I thought they re wind after a week.
     
  29. harold bain

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    Usually about once a day, Kevin. Leaves more reserve time if there is a power outage.
     
  30. Kevin W.

    Kevin W. Registered User

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    Its been running almost a day has not rewound yet. I will keep a eye on it. Thanks again Harold.
     
  31. Kevin W.

    Kevin W. Registered User

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    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.
     
  32. harold bain

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    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
     
  33. Kevin W.

    Kevin W. Registered User

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    #33 Kevin W., May 13, 2017
    Last edited: May 13, 2017
    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.
     
  34. harold bain

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    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.
     
  35. Kevin W.

    Kevin W. Registered User

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    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.
     
  36. harold bain

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    No, but it should be reasonably common, and not metric.
     
  37. Kevin W.

    Kevin W. Registered User

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    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.
     
  38. harold bain

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    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.
     
  39. Kevin W.

    Kevin W. Registered User

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    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.
     
  40. harold bain

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    I only check mine about once a month.
     
  41. Kevin W.

    Kevin W. Registered User

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    Thanks Harold, its 20 seconds fast this morning. Once i get it closer i wont touch it for a month.
     
  42. Jim Hartog

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    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
     
  43. Kevin W.

    Kevin W. Registered User

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    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.
     
  44. Steve Murphy

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    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.

    [​IMG]
     
  45. Kevin W.

    Kevin W. Registered User

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    Very nice collection Steve, Do you have a favourite one.
     
  46. Steve Murphy

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    the one on the left is my favorite, standard electric in custom case
     
  47. Kevin W.

    Kevin W. Registered User

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    Very nice clock Steve Murphy. My clock is getting near being adjusted for time keeping. And it it is winding around after running 30 hours. Yesterday a breaker was tripped by a contractor working outside on the house. When i reset the breaker the clock wound the weights. I know its winding but i never see or hear other than yesterday. I have received numerous comments from people who have seen it and really like it.
     

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