Building Bernard Tekippe’s Precision Regulator

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Building Bernard Tekippe’s Precision Regulator

Home Forums Clocks and Scientific Instruments Building Bernard Tekippe’s Precision Regulator

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  • #792512
    Chris Raynerd 2
    Participant
      @chrisraynerd2

      I don’t know if any of you are familiar with the late Bernard Tekippe, but in the 1990s he designed a lovely high precision regulator with a fairly simple design! He dispensed of the need of the pallet arbor and crutch by mounting the pallets directly on the pendulum. He made a number of these clocks which have shown to keep higher accuracy than other regulators, keeping accuracy of 0.008 sec/day – comparable to other regulators running in a vacuum chamber.

      Despite this amazing accuracy and in my opinion, lovely looking design, there is very little info online!

      I’m no expert, I just like attempting to build clocks! There is a great thread over on the NAWCC and I’ve been in contact with Steve on there who is building this clock and who has been super helpful and provided me with lots of drawings and information from his work so far. He has given me permission to use some of his CAD models in my videos – once again, I only do them for fun because I enjoy making them! I’m no expert in any of this.

      This is definitely a tribute / hommage to Bernard’s fantastic design – if I can get a working clock keeping good time, I’ll be delighted. If I can get it keeping accurate time then that’s a bonus and something to aspire to.

      I hope there is some interest in this clock as it seems a great design with such little available information and discussion!

      Here is my first video in my efforts in building this clock:

      Cheers, Chris

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      #792515
      Michael Gilligan
      Participant
        @michaelgilligan61133

        A great tribute to a very interesting design, Chris

        … Keep it coming !

        MichaelG.

        #792527
        Andrew Crow
        Participant
          @andrewcrow91475

          I’ll second that, always good to see an interesting clock design being made.

          Andy.

          #792581
          Chris Raynerd 2
          Participant
            @chrisraynerd2

            Thanks guys, I’m looking forward to the rest of the build. Onto the pendulum support this afternoon.

            #793001
            Chris Raynerd 2
            Participant
              @chrisraynerd2

              I’ve just continued making the pendulum support bracket in the video below.

              I’m on to the pendulum next. Does anyone know a UK supplier of Invar that isn’t going to totally destroy my wallet?

              Also, just curious if anyone has any experience with bearings and possibly ceramic bearings in clocks? Quite a few people seem to be using them now and I’m considering that as an option, certainly on the great wheel arbor and possibly the escape wheel arbor.

              #793018
              John Haine
              Participant
                @johnhaine32865

                Have you considered using carbon fibre pultruded tube? Far cheaper than invar and may have lower tempco. There have been some articles about using small ball bearings in clocks in HJ.

                #793050
                bernard towers
                Participant
                  @bernardtowers37738

                  Ihave a friend who is a clockmaker and and he uses bearing exclusively. and he makes a run of ten normally!!!

                  #793054
                  Chris Raynerd 2
                  Participant
                    @chrisraynerd2
                    On bernard towers Said:

                    Ihave a friend who is a clockmaker and and he uses bearing exclusively. and he makes a run of ten normally!!!

                    Hi, if you could by any luck find out what make and type of bearings, I`m be very greatful. I can see from the research people have done that some are by far better than others.

                    <em>QUOTE: John Haine: Have you considered using carbon fibre pultruded tube? Far cheaper than invar and may have lower tempco. There have been some articles about using small ball bearings in clocks in HJ.</em>

                     

                    Someone else mentioned this to me but the pallets are mounted to a milled out section of the invar rods. Therefore the design wouldn`t work in tube due to the interesting arrangement of the pallets!

                     

                    Thanks

                    Chris

                    #793060
                    SillyOldDuffer
                    Moderator
                      @sillyoldduffer
                      On bernard towers Said:

                      Ihave a friend who is a clockmaker and and he uses bearing exclusively. and he makes a run of ten normally!!!

                      Could do better Bernard!  Please go the extra mile by asking why your friend uses bearings, where he applies them, and what type(s) he uses?

                      Dave

                       

                      #793126
                      John Haine
                      Participant
                        @johnhaine32865

                        https://www.bocabearings.com/general/ball-bearings-in-clocks?srsltid=AfmBOooMcgAa4DDcBr4ly5joRJidB7JNnEIUOT1vJdJmxmr7KqWZIKpT

                        This republishes articles by Rex Swenson with useful information on using ball bearings in clocks.

                        #793130
                        bernard towers
                        Participant
                          @bernardtowers37738

                          As you wish SOD, he uses bearings as he say they they offer a train with less friction and the bearings are according to him top quality stainless 2mm id x 5mm od. They are used all through the train with larger bearings on the winding shafts.

                          #793162
                          Russell Eberhardt
                          Participant
                            @russelleberhardt48058
                            On bernard towers Said:

                            As you wish SOD, he uses bearings as he say they they offer a train with less friction and the bearings are according to him top quality stainless 2mm id x 5mm od. They are used all through the train with larger bearings on the winding shafts.

                            I have done the same with my regulator clock.  I did some comparative tests of friction on the bearings of as supplied versus all lubricant washed out and found that the bearings had significantly less friction when run dry.  My regulator has been going continuously for ten years with no sign of problems with the bearings.

                            Russell

                            #793165
                            Russell Eberhardt
                            Participant
                              @russelleberhardt48058
                              On John Haine Said:

                              Have you considered using carbon fibre pultruded tube? Far cheaper than invar and may have lower tempco. There have been some articles about using small ball bearings in clocks in HJ.

                              I made the pendulum rod for my regulator from pultruded carbon fibre  tube, mainly because I couldn’t find a source of invar rod in France.  It is claimed to have a slight negative temperature coefficient  which can be compensated for by brass fittings at either end and the suspension spring.  However the tolerance on the expansion coefficient is rather loose and it seems to creep a bit under the weight of the pendulum.

                              Russell

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