New Free Plan - Jeclanide Handwheel

Why not make this marvellous accessory for your favourite machine tool? Designed by W.B. Taylor it was featured in MEW 13, October/November 1992.

www.model-engineer.co.uk/news/article/a-jeclanide-handwheel

Enjoy!

Neil

What? No takers?

Neil

Neil,

When it originally was published it certainly didn`t appeal to me & from memory I can`t recall ever seeing it mentioned again until 29/07/2015. Be nice to know if anyone ever had a go at making it though.

Then the answer to my question "Wot the `ell for ??". or is it just me?

.

I took it ... just because I'm collecting the set of PDFs

MichaelG.

I have been contacted by a person who made one, largely because they once had a colleague who independently derived the idea and later patented a whole series of variations on it for specialist drive purposes.

Neil

.

Any idea of Patent Numbers, Neil ?

... or pertinent words from the titles, or even the dates

"specialist drive purposes" might be a bit loose for searching espacenet

MichaelG.

patents.justia.com/inventor/raul-montanana

There you go!

There's also this:

**LINK**

Which gives a better description of the drive than the jeclanide article.

Interestingly it may have been invented before the Jeclanide, was published but the patent date is 7 years after 1992!

Neil

Thanks, Neil

MichaelG.

Look at my video on Youtube: **LINK**

J Maurel

Maybe I've missed something but I am confused about this device. PDF Plan1 shows a differential gear mechanism as well as the roller clutch device, its not clear what the actual handwheel bit is and where it would be applied to a machine.

The principle of operation of this unidirectional rotary coupling/clutch/ratchet must be long established, I first came across ready made examples in my schooldays when I spent my pocket money in the (government) surplus shops in Manchester. I think I spent £2-10-0 on a complete 'Bombsight computer, which then I reduced to its component parts! It was full of gears, motors, cams, gyros and lots of really nice mechanisms etc. One of the parts I still have is a control knob and its clutch device which is exactly like the Jeclanhide device.

I wonder how someone was able to patent the idea so recently.

Ian P

> Maybe I've missed something

Read the article, don't just look at the plans...

Neil

That was sound advice. I've read it fully now (originally I lost interest at the pidgeon bit) and it make much more sense.

I still don't understand the patent/dating history.

Ian P

You'll notice that the patent was allowed to lapse. Looks as if the guy decided not to bother taking the application to a full patent - and this was just for the US. I used to joke that in the US you could patent a glass of water and I don't believe I was far off, having reviewed many hundreds in my time.

The fact that you can lodge an application proves nothing at all. Nor does being granted the final patent itself. Unless it's going to make you some money or protect your business while you cream off some profits from your invention while it is still novel and compelling, there's little point wasting your time and money, in which case you may as well put it in the public domain - so that others can't patent it.

There are innumerable companies that have outspent themselves paying for patents that have no chance of paying for themselves. Bear in mind that you need to patent your invention in every country that you think may be a potential market for it. The costs rapidly spiral and I've seen some ludicrous examples.

Ultimately, if somebody wants to copy your invention, it's just a matter of time.

One common reason for making lots of patent applications and taking them to full patent is to build up an IP portfolio. You need this is you want to get investors all hot and breathless about your new business idea ie if you are looking to liberate lots of money from them. The US seems to be particularly keen on that, although you'll see it wherever new business ideas and investors collide.

Murray

Welcome aboard Nick,

Most battery drills have a two-stage planetary gearbox. These have a high ratio that can make it very hard to drive backwards.

Neil