Mystery Tool?

[Martin King 2Participant @martinking2]

Hi All,

Not sure what this is> My first thought was a valve lifter but surely it operates the wrong way round?

Any ideas welcome!

Cheers, Martin

[Neil WyattModerator @neilwyatt]

C E G… Central Electricity Generating (Board) ?

It’s obviously for extending something sprung around a central rod or cable.

[pgk pgkParticipant @pgkpgk17461]

That type of ratchet end is commonly found on orthopaedic bone clamps but here the tool is apparently used for extension instead of compression. What is odd is the angle of the jaws. In bone clamps such jaws widen the area of compression and still perhaps allow fixator access. Here they don’t look angled to grip during extension, suggesting that some specially shaped items that fit into the jaw notches?

pgk

[peak4Participant @peak4]

As far as I can tell, it’s a valve spring compressor for side valve engines.
Obviously we are familiar with the style where the spring is compressed towards the mushroom of the valve by a G clamp arrangement, but I think these press against the casting which houses the camshaft.
This is a patent of a more fancy one designed to keep the two forks parallel.

 

See Also

Bill

[peak4Participant @peak4]

I should really have said Valve Spring Lifter, rather than compressor.
I haven’t found one quite the same yet, but from the 1922 Sears Roebuck catalogue

1927 Auto Supply Company

Getting closer, but not quite
BOG Catalog No 8

Bill

[Martin King 2Participant @martinking2]

Bill,

I think you have hit the nail on the head, many thanks indeed.

Thanks to all the other efforts, much appreciated

Cheers Martin

[Robert Atkinson 2Participant @robertatkinson2]

Only thing that suggests possibly not spring compressors is that the outside faces are curved / tapered toward the edge. This means they would be forced out of the gap. I’d expect them to flat, have a recess or even be tapered the other way.

Robert.

[Mark RandParticipant @markrand96270]

Probably parallel or tapered away from the edge by the time they are opened enough to start acting on the spring retainer.

[john halfpennyParticipant @johnhalfpenny52803]

Absolutely of the type suitable for my Model A Ford. Might be a bit big for a small british side valve.

[Michael GilliganParticipant @michaelgilligan61133]

Please excuse the topic-drift, but I have just found a delightful instructional diagram for stripping-down the Austin 7 engine:

https://ea7c.files.wordpress.com/2015/03/a7-engine.pdf

.

MichaelG.

[Howard LewisParticipant @howardlewis46836]

Frm memory, this is the sort of tool that would be used to release the valve, on a prewar Austin 10 and others..

The lower spring “cap” had a recess which covered a pin through the valve stem, so that the valve spring was retained by this “cap” washer.

Using this tool, the spring would be compressed allowing access to the pin. The pin would be removed, allowing the valve to be withdrawn for facing or replacement.

Howard

[noel shelleyParticipant @noelshelley55608]

Briggs and Stratton had an arrangement as howard has mentioned ! Noel

[Martin King 2Participant @martinking2]

They were clearly wanted as we had several messages wanting a “Buy It Now” deal! Now gone to a good home.

Martin

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