I have some AGS drawings from the 30’s-60’s and, at the bottom, there is data in the drawing block that refers to earlier AGS numbers, under ‘Alteration No.’
I am forming a theory that as amendments or additions were made to an early AGS, and they became unwieldy, the original and new information would be reissued under a new, later AGS number. So, like finding a bit of neanderthal DNA in the modern human, a later AGS may display content held in the earlier, referenced AGS under ‘Alteration No.’
I wonder if anybody could confirm or deny this. In the pictures attached of AGS 893 ‘Standard Countersunk Head Woodscrews’ the drawing block lists AGS 281 & AGS 134 under ‘Alteration No.’ I do not have either of these to look at to follow the logic through.
I would be grateful if somebody could shed some light on this, thank you, Ed
By: powerandpassion - 29th April 2017 at 13:36
Dave, thank you, brilliant. Benny Hill would have liked AGS 209.
By: radarsdesk - 27th April 2017 at 17:34
Hopefully embedded is a reasonably current AGS/AS listing. Unfortunately for the cancelled specifications it only lists the number and not a description or if has been superseded.
The current custodians of the AGS/AS drawings are SAE ITC http://eatsc.saeitc.org/standards/ but how many historic drawings/specifications they have I don’t really know. The people listed in the contact details are very helpful and have tried to resolve some enquiries for me but with no result. But it may still be worth contacting them.
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Hope it’s of use.
Regards
Dave
By: Graham.A - 27th April 2017 at 14:41
I think AP1086 is what you’re after Ed, but it has a number of amendments and you would need every amendment to cover every AGS possibility.
Good luck!
By: powerandpassion - 26th April 2017 at 15:04
Dear Sir AM, how does one get a copy of this list, please…
By: Arabella-Cox - 26th April 2017 at 15:00
AGS281 are fibre bushes for rubber piping (or at least they were in 1916!).
I wonder if the drawing has an error and it should read AGS251 which are screws, mild steel, countersunk?
My AGS listing has a blank against AGS134 (again, from a 1916 list).
By: powerandpassion - 26th April 2017 at 14:30
Thank you for your replies. I am trying to trace a logic peculiar to AGS. For example, AGS 972 for aluminium rivets is replaced by the later revision AGS 500. So it does not seem that AGS followed sequential numbering. Perhaps number blocks were reserved for particular groupings of materials ? Is there an AGS index out there somewhere?
By: Arabella-Cox - 24th April 2017 at 16:44
From my experience the list of alternations/mods on a drawing denote that those changes are already incorporated into the drawing itself. There will be a separate sheet for the alteration that describes the changes applied as denoted by the designation in the alteration box.
I base this on my experience with the Airspeed Horsa drawings where I took the drawings and cross referenced the mods to see what had been changed in the drawing to tie up with the modifications applied.
By: Dev One - 24th April 2017 at 08:02
Normally I would expect to be able to trace a detailed description of the alteration on a piece of paper filed as AGS/281 for example.
Vickers drawings would have a column on each drawing where a simplified description of the change is written, but there is usually a lot more back up paperwork created by a modification (or alteration) that has to be complied with & should be available for reference.
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April 24, 2017 at 3:57 am