Now that’s a big un

This topic has 15 replies, 8 voices, and was last updated 5 March 2018 at 08:09 by Bazyle.

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2 January 2018 at 10:01 #334875
Tractor man
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@tractorman
I picked this inspection square up on e pay recently. Quite a hefty thing for the workbench.
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2 January 2018 at 10:01 #18792
Tractor man
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@tractorman
2 January 2018 at 11:12 #334886
Harry Wilkes
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@harrywilkes58467
Remind's me of when I worked in a steel works the 'Roller' the guy who measured the hot steel on the mill floor had the largest pair of outside calipers I have ever seen when closed from top to tips had to be 36" !

H
2 January 2018 at 11:50 #334898
Mick B1
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@mickb1
Yes, but being a model engineer, surely you've accepted that size is one of the things you have to compromise on…
2 January 2018 at 12:41 #334910
not done it yet
Participant
@notdoneityet
The longer the better for making checks on a near red hot lump of steel, I would have thought!. A sensible fellow, I would say.
2 January 2018 at 21:54 #335026
vintagengineer
Participant
@vintagengineer
Moore and Wright used to make 48" squares. I used to have 36" one. They were used mainly in plate layers shops.
2 January 2018 at 22:39 #335037
Tractor man
Participant
@tractorman
This is a chesterman 1970 36 inch inspection square.
The stock has an engraved identification mark:
DECCA RADAR INSP B101
Not sure if this identifies it as a tool room item.
It’s a mighty thing and will be part of a display of unique tools in my home.
3 January 2018 at 05:56 #335057
I.M. OUTAHERE
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@i-m-outahere
Toolmakers boomerang !
3 January 2018 at 09:37 #335079
Mick B1
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@mickb1
Posted by Tractor man on 02/01/2018 22:39:16:
This is a chesterman 1970 36 inch inspection square.
The stock has an engraved identification mark:
DECCA RADAR INSP B101
Not sure if this identifies it as a tool room item.
It's a mighty thing and will be part of a display of unique tools in my home.

I'd think it possible but unlikely. Companies operating to DEFSTAN 05-21, which Decca Radar certainly would have been, were required to structure QA as a separate admin branch represented at Board level. This was to forestall the risk of commercial drivers overriding QA decisions.

It's possible that QA/Inspection might've had its own gaugemaking shop in such a large company, and it would have done the bulk of its own calibration and gauge maintenance, but I'd doubt that gauges belonging to either of those subdivisions would've just been marked 'INSP'. Your square was most likely a gauge used generally by Inspection on the shop floor.

Edited By Mick B1 on 03/01/2018 09:42:01
3 January 2018 at 14:39 #335113
Tractor man
Participant
@tractorman
I’ve popped a close up of the makers Mark in my albums that shows the name and model number and also the stamped inspection Mark. The stock is engraved DECCA RADAR insp. I cleaned it up a little this morning and put some beeswax on and it looks superb. SWMBO already has a spot picked out for it when the decorations come down.
3 January 2018 at 16:32 #335129
Russell Eberhardt
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@russelleberhardt48058
It's not how big it is that counts, it's what you do with it

Russell
3 January 2018 at 17:28 #335139
Mick B1
Participant
@mickb1
Posted by Tractor man on 03/01/2018 14:39:05:
I've popped a close up of the makers Mark in my albums that shows the name and model number and also the stamped inspection Mark. The stock is engraved DECCA RADAR insp. I cleaned it up a little this morning and put some beeswax on and it looks superb. SWMBO already has a spot picked out for it when the decorations come down.

What's the stock made of? It looks like Tufnol or suchlike?
3 January 2018 at 17:49 #335143
Tractor man
Participant
@tractorman
Must be poor lighting. It’s cast iron. The blade is actually a full L shape and the stock two separate sides riveted on to it. There is a separate steel piece held in the end of the stock by a screw which has a toothed outer edge like a grip piece, not sure if it’s function.
4 January 2018 at 19:48 #335351
Tractor man
Participant
@tractorman
This is the square next to a 19 inch Moore and Wright micrometer. Will make a nice display!
4 March 2018 at 21:45 #344448
Harry Wilkes
Participant
@harrywilkes58467
Came across this youtube video around the 2 min mark you'll see the 'Roller' taking a measurement but as it's only a small bar being rolled he's smaller callipers

Posted by Harry Wilkes on 02/01/2018 11:12:17:

Remind's me of when I worked in a steel works the 'Roller' the guy who measured the hot steel on the mill floor had the largest pair of outside calipers I have ever seen when closed from top to tips had to be 36" !

H

Edited By Harry Wilkes on 04/03/2018 21:47:15

Edited By Harry Wilkes on 04/03/2018 21:52:49
5 March 2018 at 08:09 #344472
Bazyle
Participant
@bazyle
Just s boilers have to have an ID mark for their annual inspection.to know which boiler is being tested the square would have had to have the ID mark for its annual or probably 9 monthly test and re-certification, even if that was done internally. The ID would have been recorded on the paperwork or perhaps to a particular inspector or test station and thus traceable through the paperwork. I guess a lot of us worked to 05-21 back in the day but we don't see it mentioned a lot.
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