"Razor sharp" smart repair of a suspension spring

Discussion in 'General Clock Discussions' started by Anvil2k9, Feb 22, 2020.

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  1. Anvil2k9

    Anvil2k9 Registered User

    Jan 27, 2009
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    From a Gustav Becker grandfather clock movement recently bought on a carboot sale.

    Seems ancient and works fine, hence no intention to replace it at all.

    GB Smart Repair.jpg
     
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  2. THTanner

    THTanner Registered User
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    Gillette or Sylvania? LOL
     
  3. shutterbug

    shutterbug Moderator
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    Pretty ingenious, and a well done substitute. I'd leave it too. Pretty unique :)
     
  4. Kevin W.

    Kevin W. Registered User
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    Recycling is good.;)
     
  5. tok-tokkie

    tok-tokkie Registered User

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    I would rub the two cutting edges on an oil stone (or diamond stone) to make the edges as thick as the body. Then slightly round the edges so the corner is not sharp. If that is not done I am concerned that a crack is likely to originate at the very sharp edge. Once a crack has developed they tend to propagate across the width quite quickly. If it is a 1 second pendulum that is 86 400 flexes each day.
    That the blade has the two alignment notches at the flex point confines it to the same position regardless of the variation in the angle of the swing of the pendulum.
    I agree, a very nice suspension spring, and a nice individual feature for your clock.
     
  6. JTD

    JTD Registered User

    Sep 27, 2005
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    And I would just leave it as it is. It has been there a long time and shows no sign of cracking. Just my opinion but I wouldn't do anything to it.

    JTD
     
  7. THTanner

    THTanner Registered User
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    Stored in my notes as one of the best cutting edge hacks I have seen
     
  8. MartinM

    MartinM Registered User

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    *rimshot*
     
  9. TEACLOCKS

    TEACLOCKS Registered User
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    I found this in a clock and I left it.
    The customer said its been there for years.

    Ann VerPlanck (11).JPG
     
  10. claussclocks

    claussclocks Registered User
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    An interesting repair. Better than the guy who lost his hand nut and super glued the hand on. Guess where the glue ran to? Yep, down the hour pipe

    DPC
     
  11. TEACLOCKS

    TEACLOCKS Registered User
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    I have had a clock with super glue holding the hands on. weird that it worked for a little while, then cane to a stop.
     
  12. shutterbug

    shutterbug Moderator
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    "What do you mean 'I need a longer suspension spring?' " :D
     
  13. THTanner

    THTanner Registered User
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    I had a National Time Company stamper that came in with a simple paper clip hung over the post - and the pendulum hung in the loop at the bottom. The clock actually ran even though there was no spring action at all. The foot just pushed it back and forth. I put in a proper spring and gave the owner a spare in case he broke it again.
     
  14. shutterbug

    shutterbug Moderator
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    I think the spring is just for endurance and ease of replacement. The spring action doesn't really contribute anything to the clock. Case in point, silk suspension clocks and cuckoo's. Neither requires a spring.
     
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  15. THTanner

    THTanner Registered User
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    What I observed with the paper clip was that the clock ran without stopping, but the wiggle at the top kept it from keeping good time similar to a suspension spring that is too loose in the post causing a wandering pattern.
    ..
    I was impressed with the owner's effort and the springs for that clock were not available so I had to make the two copies from a close replacement. I learned a nice lesson about making suspension springs and how inexact you can be with most clocks.
     
  16. armyguber

    armyguber Registered User
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    I have had success in snipping a new suspension spring from pop/soda cans. They are so close, if not exactly, to the gauge as to be a perfect match for vienna regulators.
     
  17. bruce linde

    bruce linde Technical Admin
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    never have to worry about grabbing the right length when using this stock material... came out of one of my banjo clocks

    ss.jpg
     
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  18. THTanner

    THTanner Registered User
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    that tape measure steel is great -
     
  19. TEACLOCKS

    TEACLOCKS Registered User
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    #19 TEACLOCKS, Mar 1, 2020
    Last edited by a moderator: Mar 2, 2020
    I have used feeler gauges.
    Also use them for reed valves for air compressors
     
  20. roughbarked

    roughbarked Registered User

    Dec 2, 2016
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    Can easily punch holes in this material.

    P3046148.JPG
     

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