What’s this used for?

[HollowpointParticipant @hollowpoint]

I got the item below in a job lot of tooling, I can’t think what it might be used for?

[Howard LewisParticipant @howardlewis46836]

Looks like the sort of jig that would be used to grind a square toolbit at 45 degrees, to make a Graver.

Howard

[Michael GilliganParticipant @michaelgilligan61133]

The words ‘Provisional Patent’ are a bit of a tease !

This could be our Bank Holiday competition.

MichaelG.

[bernard towersParticipant @bernardtowers37738]

What about using a pair of them to clamp square stock to the milling table at 45deg and level with the table!!!

[HollowpointParticipant @hollowpoint]

Howard –

That’s a possibility, it did come with some other watchmakery type items. That said, I imagine it would be ruined quite quickly if you tried to file or grind between the slot. It certainly looks like it is for measuring or marking at 45 degrees though.

Bernard –

That’s a good shout too. Didn’t think of that.

[Speedy Builder5Participant @speedybuilder5]

Mine came from a UK tool maker circa 1950. I have never used it,. It is branded

SMYTH TYRRELL & COOK

…..MSFORD  (The first 4 letters or so are unreadable)

[Speedy Builder5Participant @speedybuilder5]

I believe it is some sort of marking out tool as it came with “V” blocks and an inside out “V” block ie a piece of precision 90 degree angle with clamp for holding round stock in the “V”.

[Graham StoppaniParticipant @grahamstoppani46499]

Looks like it says CHELMSFORD at the bottom

[Speedy Builder5Participant @speedybuilder5]

And this is the Inside out “V” block

[Speedy Builder5Participant @speedybuilder5]

And this is the Inside out “V” block

[HollowpointParticipant @hollowpoint]

Thanks for posting that. Interesting.

[BazyleParticipant @bazyle]

The inside-out V-block allows you to eg drill a hole across round stock and then flip it 90 degrees to drill again which a normal v-block doesn’t. We had one at work but of course one day the clamp went missing and it became useless.

[Speedy Builder5Participant @speedybuilder5]

Still no idea – should have offered a prize for the correct use of the first tool!

Bob

[Michael GilliganParticipant @michaelgilligan61133]

I haven’t found anything about the specific item … but I have found a patent by Smyth-Tyrrell in a similar field of endeavour:

https://worldwide.espacenet.com/patent/search?q=pn%3DGB139248A

… and it’s earlier than we anticipated.

MichaelG.

[Bazyle]

On Bazyle Said:

The inside-out V-block allows you to eg drill a hole across round stock and then flip it 90 degrees to drill again which a normal v-block doesn’t. We had one at work but of course one day the clamp went missing and it became useless.

Unless you stand the normal V block on a pair of parallels to get the clamp up off the table when you turn it the 90 degrees.

 

[peak4Participant @peak4]

I was looking a while ago, but got sidetracked.
I came across this in The British Newspaper Archive, but since I don’t subscribe, I couldn’t access it

So by 1936, maybe Smyth-Tyrrell & Sons, if it’s the same company, moved from New Writtle St to London Road.

Not in Grace’s Guide as far as I can tell, but might be in Kelly’s directory.
I cant find access to a free copy but there is a 1926 one available for download.
There’s stuff in the local reference library, but that doesn’t help from Buxton.
See also; it looks like Fred died in Nov 1939
https://www.findagrave.com/memorial/205420012/fred-smyth-tyrrell

None of which helps identify the object of course
Bill

[Speedy Builder5Participant @speedybuilder5]

I did wonder if it appeared in an old Buck & Hickman catalogue, sadly I gave mine away 20 years ago !

Just found a link to the first 112 pages and page 52 gives the answer to a previous What’s This !!

https://archive.org/details/buck-and-hickman-1953-catalogue/page/n51/mode/2up

[Speedy Builder5Participant @speedybuilder5]

Just found the complete catalogue on-line – Its not in there though!

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