Brian Law's Woodenclocks-Clock 18 Clock with Non-Circular Gears
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- Опубліковано 3 жов 2024
- This clock started really as a challenge to see if I could design a couple of elliptical gears to mesh together, that worked out pretty well, so I started to look at meshing gears of different sizes. Well that wasn't so easy, took a while to sort that out, but it led of course to see if I could design the gears to give the reductions necessary to form a clock, that took a lot longer but got there in the end so this clock was born. Hardest project I have undertaken to date, but it was worth it.
That must have been a nightmare to get right, there are quite a few noncircular gears out there, but until now I have not seen a practical use, and especially getting them to work in the riged constraints of a clock. You have my respect.
Fantastic job Brian! Love the organic feel to it.
excellent work.
I like the improvements (bearings, pallets, secondary dial).
Great clock, love the idea with non circular gears... I'm fascinated of mechanical clocks and yours always are something special... I appreciate your great work...
Keep going with the non-circular gears, there's a hidden unknown magic with them.
Brian is so genius
Brilliant masterpiece!
Brian you are genius ! :)
Amazing and genius ...Just to see this complicated machine inspired my little mind so , I come to be a cosmic creator or a comic dreamer for fun ...
Das ist fantastisch!
Fantastic, show!!
Very cool. Functional art.
Hi Brian,
What are you drinking????smoking????Great work...[good music too]...
splendid clock !! it's fantastic
Brian, here are some remarks concerning your gravity escapement.
At first sight, this appears to be an improvement of Arnfield's design, because, upon unlocking,
the locking lath ROTATES away from the tooth, rather than that it is shifting PARALLEL to the
common contact surface with the tooth. Looking more closely, however, the sliding friction
problem is now shifted to the lower latch contact with the locking lever. The force pressing this
latch against the locking lever is the same as that pressing against the upper latch. So, in my
opinion, you could leave out the 5-armed latch as well, and make the locking lever contact the
escapewheel directly.
Further, the (blue) locking lever plays the role of the inertial (or neutral) arm in the Arnfield
escapement. In that escapement, however, the inertial arm is quite similar to the impulsarm,
and has the same moment of inertia (about the common axis). Therefore, upon the collision
of the impulsarm with the inertial arm, angular momentum is completely transferred to the
inertial arm, bringing the impulsarm to a sudden stop (provided it is then in its equilibrium position),
allowing the pendula to separate. Because, in your escapement, the mass, and also the inertial
moment, is much smaller than that of the impulsarm, the impulsarm does not come to an immediate
stop. It may do so, however, because it is (indirectly) stopped by the stop pin of the locking lever,
but then the unlocking of the escapewheel has already taken place (with the pendulum not yet
separated from the pendulum impulspin; you can actually see in the animation that unlocking takes
place when the pendulum is still in contact with the impulsarm).
Of course, your clock will work, but I don't think the pendulum is really free.
Kind regards,
Ben van de Waal
Ben
You are correct the design is developed from the Arnfeild escapement. I have been working on a revised version of the design that does indeed do away with the 5 armed latch to simplify the locking. I have a prototype of the new device working now, so it will be incorporated into the next clock.
My own feeling on the release, is that the pendulum feels no retarding force at the point of unlatching only the cessation of the impulse force and therefore it is really free. The reasoning is that as soon as contact is made, the impulse arm is retarded if not stopped, but the pendulum will carry on moving at the same speed and will immediately lose contact with the impulse arm.
The other feature that was added was to mount the Gravity arm and the pendulum at the same pivot so there is absolutely no relative movement between the pendulum and the impulse arm.
hi Brian, do you also sell finished products or just the plans? just curious! great work man, this is a masterpiece.
propheccy I only sell the plans for the clocks
You should connect with Bob Bray at Sinclair Harding
Muy interesante y entretenido, me gusta
...also the shape of gear !
Brian my name is alan can you tell me how can I buy clock 18 with Non-Circular gears with thanks alan
i would think the irregular diameters of the gears would produce cyclical irregular impulse. how do you compensate for this? i'd guess orientation of the gears with respect to the other arbors must be observed, e.g., if the pinion on arbor A is presenting its lesser diameter to the spur gear on arbor B, then the pinion on arbor B must present its greater diameter to its respective spur gear, etc.
does any of my gobbledeegook make sense, and, if so, am i right?
KEvron
I think there is a bit of irregularity as the gears move a different speeds relative to each other, but it all balances out, the clock actually runs quite accurately, the prototype actually loses about a minute in 12 hours, I've given up trying to refine it further. The gears are all marked so that you line up the dots when you assemble it and then it runs fine, get one slightly misaligned and the whole clock will stop.
Regards
Brian Law
Brian Law
"I've given up trying to refine it further"
it's a delightful piece as is.
KEvron
Brian Law
I would think that if the centers are fixed then the gear train will complete a revolution the same as if the gears were circular. As you say it all balances out and with the added bonus that it looks remarkable and strangely simplistic, which we all know it isn't. Great work, Brian. I've always admired your work. :-)
Hi Brian! How did you made the pendulum support?
I turned it from a piece of brass, tapped the one end M6 and then machined the 90 degree groove in the top with the edge of an end mill, coming in from the side.
like,thanks
superbe. ..!où peut on trouver les plans merci
+paskalin You can download the plans(files) from the website www.woodenclocks.co.uk
+Alfredo Zanca Yes, I think, I built all my clocks on a machine with 340x240 table.
que belleza
I really enjoyed the way you used the Escaple wheel for your Pallet finger pushers, instead of the Pallet fingers being angled.... That way your Pallet fingers are fully adjustable both ways against the Escape wheel. When doing this, does this make it more difficult to make the Escape wheel? Is the roundness of the Escape wheel a little more forgiving in this design?
By the way, excellent job. . .
+Wooden Clocks -I've always done it this way around as it makes the teeth thicker and stronger, and I have never really had any issues doing it this way