Series D details

[craig]

So, D men, What are the dimensions on the original SL16 angle brackets?

 

[craig]

Here is my only reference photo, pretty good, but isn't there an official print or research done on this? too obscure?
Is the PR363 installed thin or thick edge up?

 

[vibrac]

Speedos are metric throughout.

Oh if only I could find my know thy beast! I thought BA threads came into speedos somewhere...

 

[craig]

I scaled my photo to estimate the SL16 dimensions. Came up with the following dimensions, off to fabricate, small item, easy to fab, obscure but needed.
3/4" width, zinc plated steel strap should be a local item.

drawing not to scale

 

[nkt267]

Oh if only I could find my know thy beast! I thought BA threads came into speedos somewhere...

0ba if i remember correctly,often confused with 1/4 BSF..Why is my computer printing numbers in lower case????John

 

[Simon Dinsdale]

0ba if i remember correctly,often confused with 1/4 BSF..Why is my computer printing numbers in lower case????John

Robin is correct in an earlier post. All threads and dimensions on Smiths chronometric speedos are metric, internal and mounting. The two mounting studs in question are M6x1. An 0ba nut will fit, but not properly as they have a thread angle of 47.5 degrees against metric which is 60 degrees.

The Smiths chronometric instruments were a development of the Jaeger instrument of the 1920's of which Jaeger was French hence the metric dimensions. I believe somewhere in time Smiths purchased Jaeger.

Simon

 

[A_HRD]

Robin is correct in an earlier post. All threads and dimensions on Smiths chronometric speedos are metric, internal and mounting. The two mounting studs in question are M6x1. An 0ba nut will fit, but not properly as they have a thread angle of 47.5 degrees against metric which is 60 degrees.

The Smiths chronometric instruments were a development of the Jaeger instrument of the 1920's of which Jaeger was French hence the metric dimensions. I believe somewhere in time Smiths purchased Jaeger.

Simon

Simon is right of course. The Smiths takeover was, I suspect, during the 1930s because most Series 'A' machines had speedos with both Smith and Jaeger emblazoned on the face.

 

[clevtrev]

`Twas 1927 that Smiths bought the English division of Jaeger, and did not change a thing.

 

[Bill Thomas]

Hello Craig, Have you stopped thevincent.com site ? I have a quick look most days, But can't get it for a few days, Cheers Bill.

 

[bmetcalf]

thevincent.com just opened fine for me.