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18 PR HE... Threaded recess in base of projectile

S

staples57

BOCN Supporter
Asking the Experts...

I recently picked up an unfired (INERT) 18 PR HE projectile, fitted with a No.101E fuze.
It's marked as follows...

Q.F. 18 PR
F.S.
III
CGE
13-2-16

I believe that this indicates a Quick Firing 18 Pounder, Forged Steel construction, manufactured February 2, 1916.
The Manufacturer, CGE is unknown to me.

The base of the projectile has a 2 - 1/4 inch diameter x 3/8 inch deep threaded recess.
The only information that I've found is the following machining diagram.

18pdrHEShellDiagram (2).jpg


Can anyone tell me what the threaded recess is for?
Also, does anyone know who CGE is?

Any information is greatly appreciated.

Many Thanks!
Brad
 
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Brad,

The grain flow of shell is perpendicular to its diameter. There were concerns that the gas pressure on firing would penetrate the base and cause detonation of the filling. To counter this a disc of metal, who's grain flow was parallel to the diameter, was either screwed or riveted to the base.

TimG

CGE - Canadian Allis Chalmers Co. (Also used a 'G' within a 'C')
 
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Brad,

I was a little suspicious of CGE being Canadian Allis-Chalmers and did a bit more research.

CGE is also the monogram of Canadian General Electric Co., Toronto, which makes far more sense. However, CGE and what I thought was G within a C is actually CA within a C are also shown for Canadian Allis-Chalmers also of Toronto together with yet another of C.A.C. Ltd with M as a denominator. I suspect that Canadian Allis-Chalmers were sub-contracted by Canadian General Electric Co. There is no apparent way of identifying which of the two made the shell.


TimG
 
Thanks Tim!
The amount of information found on BOCN never ceases to amaze me.

Canadian General Electric Co., Toronto... that's great!

Cheers,
Brad
 
Just to see. Is CA/C also Cnd-Allis-Chalmers or a different manufacturer ?
Cheers, SHAKY
 
Shaky,

CA/C - Canadian Acme Screw & Gear Ltd. Manufacturers of No. 251 & 255 Fuzes (and maybe more)

TimG
 
I recently bought at an Antiques Fair a brass 18 pounder mark 2 shell cartridge, the headstock markings are:-

18.PR
11

A superimposed over C, within a C. note that this is Canadian Allis-Chalmers

DGJ any ideas?

broad arrow within a C indicating Canadian manufacture

57 within a circle - could this be an inspection mark?

4-10-17 obviously date of manufacture

1917 C.F either charge filled or cordite filled?

numerous other marks including 10/17, a broad arrow, No.1
WRL, F3, 1/18 and P on the central copper disc that contains the firing cap.

obviously all of these have a meaning, any one have any suggestions?

Mike.
 
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The "DGJ" is a typical three character code found on Canadian made cases that AFAIK has not been cracked. The "57" is an inspectors mark and the "CF" is cordite filled full charge.

No.1 is the primer type and WRL the manufacturer (will look that up if Tim does not answer first). "1/18" is the date.

Regards
TonyE
 
Mike,

An image wouldn't go amiss

The C and Broad arrow is an acceptance stamp.
WRL - Wm. Ryder Ltd., Beehive Works, Bolton, Nr Manchester
F3 – National Filling Factory, No. 3 - Hereford

TimG
 
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