3A fuse for bathroom fan

[wiresnpliers]

Hi All,

Like many practicing electricians I have been frustrated that there is not a simple solution when wiring a bathroom fan with timer and the manufacturer's instructions say that it must be fused with one 3 amp fuse. I believe I have come up with the solution, which I have patented, what I'm struggling with (because I'm a sparks, not a manufacturer) is how to get this thing made, or if it was made, whether anyone would use it. I've attached the wiring diagram, which is pretty self explanatory. Feed back and/or any ways into manufacturing would be appreciated!

 

[snowhead]

Not wanting to squash your dreams of retiring to your own Island somewhere in the World, but I suspect if there was a market for it, then with all the accessory manufacturers that there are, I'm sure one would already have produced it.

It took Dyson over 20 years, a lot of rejections and a lot of money trying to get his idea to market, but look where he is now.

Your biggest hurdle is getting it into production without infringing any other patents, like how the switch contacts move, style of switch etc.

You'll need to employ a Product Design Consultant, who can put the idea into something that can actually be manufactured.

You've got several options,
Sell the patent to a manufacturer.
Prove a market and then sell.
Produce a prototype, test it and then sell.
Get it produced prove sales and then sell.
Licence it to a manufacturer or other agent.

Each step further you take will cost 10's or hundreds of thousands of pounds.

Good luck.

 

[timhoward]

I like it and I'd use it.
Random thought - it might be worth talking to Flex7, the people who make the Quickwire products under license. They are UK based and still small enough to not be unreachable.

About

Established in 1998, Flex7 is a British company that design and manufacture lighting connection & control products.

www.flex7.co.uk

 

[DPG]

I'd speak to the likes of MK and Click etc. See if they are interested in buying the patent. You may well find they've considered something like this but they don't think there's a market for it.

 

[Lucien Nunes]

Aggre with the above. With a single initial offering of a product, useful though it might be, it will be almost impossible to compete with established firms offering complete ranges that sell hundreds of thousands of units per annum. Buyers will want to spec items from existing ranges, for matching appearance, trusted quality etc.

Your aim is therefore to convince the bean counters of its utility, rather than sparks, so a different set of factors might come into play. E.g. one manufacturer buys exclusive rights so that other manufacturers don't have something in their ranges that the first has not got. They might not actually make it if they don't think the volume sales are there, but they have control of it. You might never see one in real life.

 

[Ian1981]

Click Scolmore already product such a product

 

[wiresnpliers]

Not wanting to squash your dreams of retiring to your own Island somewhere in the World, but I suspect if there was a market for it, then with all the accessory manufacturers that there are, I'm sure one would already have produced it.

It took Dyson over 20 years, a lot of rejections and a lot of money trying to get his idea to market, but look where he is now.

Your biggest hurdle is getting it into production without infringing any other patents, like how the switch contacts move, style of switch etc.

You'll need to employ a Product Design Consultant, who can put the idea into something that can actually be manufactured.

You've got several options,
Sell the patent to a manufacturer.
Prove a market and then sell.
Produce a prototype, test it and then sell.
Get it produced prove sales and then sell.
Licence it to a manufacturer or other agent.

Each step further you take will cost 10's or hundreds of thousands of pounds.

Good luck.

Thanks for the feedback. Any "no win, no fee" product design consultants out there?

 

[wiresnpliers]

Click Scolmore already product such a product

It doesn't have the light switch on the plate, which allows for the 3 core cabling from the light, to the switch unit, to the fan. Having a fuse next to the fan on a plate doesn't solve the problem of how to fuse both the L and the SL using the same fuse, without extra faffing about.

 

[wiresnpliers]

I like it and I'd use it.
Random thought - it might be worth talking to Flex7, the people who make the Quickwire products under license. They are UK based and still small enough to not be unreachable.

About

Established in 1998, Flex7 is a British company that design and manufacture lighting connection & control products.

www.flex7.co.uk

Thanks for the lead and positive feedback.

 

[polaroid]

Your patent needs to be water tight otherwise a few small changes would allow a copy to be made by a main manufacturer, undercut you and destroy your investment.

 

[brianmoooore]

..........doesn't solve the problem of how to fuse both the L and the SL using the same fuse, without extra faffing about.

Not really necessary to fuse the switched live. It's only a control wire, and normally connects directly to a high value resistor. No chance of overload, so SC protection only required, which is provided by the circuit fuse at the origin.
Permanent live will be subject to overload under certain fault conditions, hence the 3A fuse.

 

[wiresnpliers]

Not really necessary to fuse the switched live. It's only a control wire, and normally connects directly to a high value resistor. No chance of overload, so SC protection only required, which is provided by the circuit fuse at the origin.
Permanent live will be subject to overload under certain fault conditions, hence the 3A fuse.

Most manufacturers provide instructions (and/or diagrams) requiring one 3A fuse protecting both the L and SL. It's the compliance with instructions (and hence Regs) that outweighs the opinion on whether protecting the SL is necessary.

 

[brianmoooore]

I remember a gas boiler where the manufacture's instructions specify a fuse in both the live and neutral, so not always.

 

[wiresnpliers]

I remember a gas boiler where the manufacture's instructions specify a fuse in both the live and neutral, so not always.

I agree that sometimes we see all sorts of strange instructions, particularly those lost in translation, however on this one there is a consistency across most manufacturers. The point being if something should ever go wrong, proving compliance with instructions would be far more the simplest option, in the litigious world we live in.

 

[Lucien Nunes]

One obstacle that might have dissuaded many electrical accessory manufacturers from tooling up for this, is that its usefulness hinges on the fan manufacturers' rather daft policy of making installers jump through hoops simply to save £0.10 on the price of a fan. That is a realistic price, in quantity, for a suitable fuse added to the PCB. There's no point having it separately replaceable because it should only blow if the motor is destroyed; they are normally impedance protected against being mechanically stalled. Therefore once one major manufacturer decides to take advantage of this, adds the fuse and heavily promotes their fans to installers as being internally fused, others may follow and the specialised fused fan isolator will be redundant.