The stand alone weight for tower clock

[Robert Atkinson 2Participant @robertatkinson2]

Ahh, The weight moves inside the cylinder. I hadn’t realised that.
Looks vey well made.

[JasonBModerator @jasonb]

No I think he meant that the whole monkey cylinder and all descends until it senses the chain looping back up at the bottom and that is what sets it climbing again. So if a 5m chain it can drop about 2.3m before it has to climb again.

 microswitch mounted on the weight and activated by the lower radius of the chain

[dk0Participant @dk0]

Yes, the whole monkey cylinder has a small arm at the bottom connected to a microswitch that intercepts the curve of the ascending chain.The roller chain forms a closed loop, Jason’s statement is correct: chain length 5 meters, stroke 2.3 meters.

The solution with a descent timer is much more practical and used.

[Clive SteerParticipant @clivesteer55943]

In the example show the weight is acting on the normal cable drum. I believe  a similar method of powering the train can use the next shaft up the train which would require less weight but the monkey would have to climb more often.

Clive S

[Clive Steer]

On Clive Steer Said:

In the example show the weight is acting on the normal cable drum. I believe  a similar method of powering the train can use the next shaft up the train which would require less weight but the monkey would have to climb more often.

Clive S

With this solution the weight is sized to make the pendulum and escapement work while the height is used to give more hours of operation.

[bernard towersParticipant @bernardtowers37738]

Only problem with using the second shaft is that the arbor is usually a smaller dia so more prone to wear. When I did mywilding clock I fitted roller bearings to the winding drum (shock horror) and no issues so far (running since 2018). Electrically wound via endless chain and weight operate tilt switch.

[JasonB]

On JasonB Said:

No I think he meant that the whole monkey cylinder and all descends until it senses the chain looping back up at the bottom and that is what sets it climbing again. So if a 5m chain it can drop about 2.3m before it has to climb again.

 microswitch mounted on the weight and activated by the lower radius of the chain

I’d already guessed the the bottom could be sensed by the chain loop but there is no obvious top sensor. Time was one option.

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