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[4]

A Beginners Clock

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BRIAN

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#31
Re: The next project

Plate and Pillar assembly.

lkjhg.JPG

Brian.

lkjhg.JPG
 

BRIAN

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#32
Re: The next project

Next job is to notch the balance beam ( foliot ) to locate the controll weights.

P1011879.JPG

All done on the 7x12


P1011881.JPG

Plodding on Brian.

P1011879.JPG P1011881.JPG
 

juliusz

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#33
Re: The next project

Hi,

I read this thread and all I can say it is marvellous. I did some clock making long time ago but most jobs were done with proper tools. Here, however, I found many of the classic ideas from my clock making books turned into reality. Very, very nice thing to find.

How is the clock build going? This project deserves special respect from me.

Juliusz
 

BRIAN

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#34
Re: The next project

Thanks Juliusz, I am waiting on the post to deliver the no57 drill that i require to make the pinions. so i have made progress on the hand work.
This is the pile so far.


P1011886.JPG

It's coming allong.
Brian.

P1011886.JPG
 

Mark Lossner

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#35
Re: The next project

...this has 32 teeth so i used the 80 tooth change wheel to do the indexing.
How do you use an 80 tooth gear to index 32 positions? Every other tooth gives 40, every third gives 26.667. What am I missing?

Mark
 

BRIAN

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#36
Re: The next project

Hi Mark

80/ 32= 2.5 index every 2 1/2 teeth.
I dont think you missed anything, just went down not up, think of it as a 160 t gear.

OK, Glad to help:)) Brian.
 

BRIAN

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#38
Re: The next project

I used 2 pawls the second one is adjustable to get exactly 1/2 a tooth.

Now you can see why i am doing a instruction book for this clock over 100 photos taken so far and 15 drawings done , and a long way to go yet.

Every question asked helps me see how to construct the book.

Thanks, Brian.
 

Mark Lossner

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#39
Re: The next project

I used 2 pawls the second one is adjustable to get exactly 1/2 a tooth.
That is pretty cleaver! Your thread is VERY interesting; and, I'll be watching it very closely. You might get tired of me prodding you.

Now you can see why i am doing a instruction book for this clock over 100 photos taken so far and 15 drawings done...
It will be a treat to see the finished clock and the book. More power to you! I plan to goad you onward.

Mark
 

Randy_m

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#40
Re: The next project

Nice clock work. I'll be watching this thread, lots of great ideas.
 

BRIAN

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#41
Re: The next project

Just to keep things ticking over while I wait for a no 57 drill,??? This is the first part to be put together
Its the winding cord hub and ratchet wheel.

Brian
P1011897.JPG

P1011897.JPG View attachment 96397
 

BRIAN

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#42
Re: The next project

Today I managed some shop time, and made the bushes.
These are required because I am using steel for the plates.
Clocmakers use very thin bushings to repair worn clocks,but these may be beyond the skills of the person that this clock is aimed at. So i have made nice small Top Hat ones
P1011912.JPG
P1011913.JPG

P1011914.JPG

P1011912.JPG P1011913.JPG P1011914.JPG P1011915.JPG
 

phansen39

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#43
Re: The next project

Can you go into more detail on Lathe gear indexing? Like construction of the bushing that connects the index gear to the lathe spindle.
single pawl.JPG

single pawl.JPG
 

BRIAN

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#44
Re: The next project

Im going to have to put this project on the back burner for a while as I have had a disaster with my boat engine that threatens my summer cruising.:nono:

Loads of work to do

Regards Brian.
 

BRIAN

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#45
Re: The next project

Cant work on the boat due to storms, so it's into the workshop to turn the main arbor. and do a trial assembly.

P1011932.JPG

Only the pawl and spring to go and the main arbor assy is finished.

Brian

P1011932.JPG
 

BRIAN

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#46
Re: The next project

The plate asembly, now fitted with bushes for the main arbor.
The 5 sided tapered broach is used to enlage the bushes from both sides, untill the arbor fits.

P1011935.JPG

P1011936.JPG


This is the only arbor that is placed by measurement. the others are placed by the fit of the gears.

Brian.

P1011935.JPG P1011936.JPG
 

RLWP

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#47
Re: The next project

{snip} It also mentions a device called the "Eureka continuous form relieving attachment" for reliving the form on multi-tooth cutters. It sounds like drawings may be available to make one, so the search continues...

Tom
Did you find the answer to this? The Eureka is drawn up in 'Gears and Gear Cutting by Ivan Law, Workshop Practice Series 17'

Richard
 

Tom Griffin

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#49
Re: The next project

Yes Richard, I ordered that book from the Book Depository over in your neck of the woods.

Thanks,

Tom
 

BRIAN

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#50
Re: The next project

At last the drill has arived, So i can drill the holes to make the lantern pinions.
The first is the 5 tooth pinion that drives the hour wheel.
To do this a minidrill is set up on the vertical slide.

P1011949.JPG

And a 50t gear used to index at 10 teeth advance.

P1011955.JPG


Gear now ready to insert the pins.


Brian.

P1011949.JPG P1011955.JPG
 

BRIAN

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#51
Re: The next project

Next item is a lantern pinion
Same set up with 80t gear to index 8 pins.

P1011966.JPG

On test with its mating gear, works perfectly.

P1011968.JPG


Brian.

P1011966.JPG P1011968.JPG
 

RLWP

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#52
Re: The next project

attachment.php?attachmentid=48402&d=1362084247&thumb=1.jpg

Have you made a five leaf lantern pinion before Bruce? It looks a bit mean to me

Richard
 

BRIAN

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#53
Re: The next project

Hi Richard
On clocks of this type it is more common to have a 4 leaf pinion to drive the hour wheel.
but I dont like them, It leaves very little space in the centre for the arbor.
On this clock I have had to use numbers that I can index with the change wheels of the lathe.
Minimal tooling is what this clock is all about, so it can be made by somone new to the hobby.

Brian.
 

RLWP

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#54
Re: The next project

Well, it's infinitely better than a four leaf pinion!

I do understand and agree with your aims too, just curious about having only five leaves. If it works, it works!

Richard
 

BRIAN

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#55
Re: The next project

Hi Richard.

This gear and its partner must have a 12-1 ratio because it is part of the hands drive.

So even one tooth up on this pinion has a big efect on the size of all the other gears.

If I was making a better quality clock the answer is to make the teeth smaller and have more of them.

But this clock is made with one cutter ( minimal tooling again ) and this module is selected because it is tolerant of dirt, the cutter is easy to make, and the maths are easy to understand, with MOD 1 the PCD in mm is the same as the number of teeth.


Keeping the clock simple to make involves many inter-related problems.

Brian.
 

BRIAN

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#56
Re: The next project

The last pinion is now finished.

P1011975.JPG

on test.

P1011981.JPG

Assembly can now continue.:))

Brian.

P1011975.JPG P1011981.JPG
 

BRIAN

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#57
Re: The next project

Marking out the position for the next arbor using the depthing tool.


P1011983.JPG
Slowly slowly.

Brian.

P1011983.JPG
 

BRIAN

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#58
Re: The next project

The first trial assembly.

P1012006.JPG

This pair run smooth so its on to the next.:))

Brian.

P1012006.JPG
 

BRIAN

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#59
Re: The next project

:happyhappy:
3rd Arbor fitted, thats the power train finished.


b.JPG

Brian.

b.JPG
 

David S

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#60
Re: The next project

Hi Brian, I repair old clock movements and prefer to make / repair parts rather than buying them. I have been following your progress. Very nice work indeed.. I often have to make tools etc in order to make repairs, but your craftsmanship is awesome.

David
 
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