Matilda Bow Saw.

[swagman]

Hi all. Attached are photo's of a bow saw I recently completed. It has a 12" blade fitted.

The concept behind my design was to generate enough tension for the bow saw blade, but create this tension within the lower half of the frame where it is ideally functional. This alleviates any need to overtension the upper frame such as is required on a traditional bow saw.

This lower tension is provided by an 0.040" saw steel band, bent within this lower frame, that creates significant "spring" outer pressure onto the blade.

The main role of the tightening cord is now to firm up the bow frame, locking the horizontal spreader to the 2 vertical arms.

Both handles slide into a brass bush, with the threaded rod allowing secure tightening to the frame.

In function, the bow saw works extremely well. I have called this design, the Matilda Bow Saw.


Regards; swagman.

 

[Philly]

Very nice, Stewie - like the way you're thinking!
Philly

 

[Waka]

Thats very nice and I do like the design.

 

[swagman]

Very nice, Stewie - like the way you're thinking!
Philly

Thanks Philly. It can be surprising sometimes what a bit of lateral thinking can achieve.

All the best. Stewie

 

[swagman]

Thats very nice and I do like the design.

Thanks Waka. I appreciate the feedback.

Take care; Swagman.

 

[aesmith]

Nice. What did you use for the actual blade?

 

[woodbloke]

Nice...but I can't see any advantage on this variation that will have significantly improved the original design, which lets face it, has been around for at least 2000 years.

This is a frame saw I did recently with a 6mm rod to tighten the whole gubbins up, which is a departure from the traditional cord tourniquet:

If it ain't broke, it don't need fixing :wink: - Rob

 

[Waka]

Ah but Rob you've done a deviation form the original design with your screwed rod and wing nut. Personally I find it detracts and would rather see the original tightening method.

If it ain't broke fix it till it is :wink:

 

[woodbloke]

Ah but Rob you've done a deviation form the original design with your screwed rod and wing nut. Personally I find it detracts and would rather see the original tightening method.

If it ain't broke fix it till it is :wink:

Ah...but you see Waka, the ancient Romans wouldn't have had a 6mm threaded rod...both methods though work equally as well. I suspect that the original model would have used twisted sinew and may have been a direct 'lift' from the military war machines of the time - Rob

 

[Woodmagnet]

Stewie and Rob, both are very well thought ideas. 8)
Well done to you both.

 

[Racers]

Hi, Chaps

Here is my curvey babe of a coping saw bowsaw and the things she does.

Pete

 

[Aled Dafis]

Nice work gents, I've been meaning to make one for quite a while.

Just one question, where do you get your blades? Would bits of bandsaw blade do?

Cheers

Aled

 

[Racers]

Hi,

**** tools do them http://www.****.biz/****/category/dickc ... detail.jsf
Or you can use bandsaw blade.


Pete

 

[Chris Knight]

This is a frame saw I did recently with a 6mm rod to tighten the whole gubbins up, which is a departure from the traditional cord tourniquet:

Rob,
I think that is still basically a bow saw. IIRC, frame saws have the blade in the centre of a wooden frame and are used only for ripping down boards that are narrow enough to fit within the frame outers.

Like this one:-

 

[wizer]

 

[Waka]

Ah but Rob you've done a deviation form the original design with your screwed rod and wing nut. Personally I find it detracts and would rather see the original tightening method.

If it ain't broke fix it till it is :wink:

Ah...but you see Waka, the ancient Romans wouldn't have had a 6mm threaded rod...both methods though work equally as well. I suspect that the original model would have used twisted sinew and may have been a direct 'lift' from the military war machines of the time - Rob

They would if they went to see Hengis Pod :lol:

 

[swagman]

Nice. What did you use for the actual blade?

Hi aesmith. I have attached an ebay link to the seller of the bow saw blades I use. Its a U.K seller. These are a traditional blade. Just type in "bow saw" in the search field.

Regards;Swagman



http://stores.ebay.com.au/The-Plane-Iron-Shop

 

[swagman]

Nice...but I can't see any advantage on this variation that will have significantly improved the original design, which lets face it, has been around for at least 2000 years.

This is a frame saw I did recently with a 6mm rod to tighten the whole gubbins up, which is a departure from the traditional cord tourniquet:

If it ain't broke, it don't need fixing :wink: - Rob

Hi Rob. If you still use a horse and cart for transport, still use a bow & arrow to kill your food, and also refuse to use any other means of modern idea's , I would consider you are a seriously believer in the statement " if it ain't broke, it don't need fixing". :lol:

Seriously.If you can make an improvement to the original design, and it can help others who will also benefit from its use, its got to be worth doing.


All the best; Swagman.

 

[swagman]

Stewie and Rob, both are very well thought ideas. 8)
Well done to you both.

Thanks Woodmagnet. Regards Swagman.

 

[swagman]

Hi, Chaps

Here is my curvey babe of a coping saw bowsaw and the things she does.

Pete

Hi Peter. That's a beautiful saw. Well done ! .

Regards Swagman.