Image:TFrictionTubeMkIV.jpg

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Description

British "T" Friction Tube Mk IV, for BL guns, 1914.
Height approx. 1 7/8 inches. T approx 1 7/8 inches. Tube tapering to 1/4 inch.
A hole is bored through the side of the head, at right angles to the wire passing through. The hole is filled with detonating composition, surrounding the roughened part of the wire, and the hole is sealed up.
Action :-

  • The gunlayer inserts the tube in the breech vent.
  • A lanyard is attached to the loop in the wire in the T.
  • The gunlayer pulls, or extends and "chops down on" the lanyard.
  • The friction wire is pulled through the detonating composition and out of the head, igniting the detonating composition by friction.
  • The flash passes down the small hole in the top of the body, over the copper ball, through the fire-holes in the brass screw-plug, and ignites the powder.
  • The expanding gas forces the copper ball up into the cone seating, sealing the vent on the inside of the tube, and expands the tube body, sealing the vent outside the tube.

Used with :-
Source

Plate LXXIV & Pages 366-367 in "Treatise on Ammunition" 10th Edition 1915.
Date

1915. Facsimile reprint by Imperial War Museum and Naval & Military Press, 2003.
Author

War Office, UK.
Permission
(Reusing this image)

Crown Copyright expired (50 years)

Public domain This artistic work created by the United Kingdom Government is in the public domain

This is because it is one of the following:

  1. It is a photograph created by the United Kingdom Government and taken prior to 1 June 1957; or
  2. It is a photograph or an engraving created by the United Kingdom Government and commercially published prior to 1958; or
  3. It is an artistic work other than a photograph or engraving (e.g. a painting) which was created by the United Kingdom Government prior to 1958.

More information. See also Copyright, Crown copyright artistic works and HMSO Email Reply.

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current14:12, 22 January 2008800×319 (136 KB)Rcbutcher ({{Information |Description=British "T" Friction Tube Mk IV, for BL guns, 1914. <br>Height approx. 1 7/8 inches. T approx 1 7/8 inches. Tube tapering to 1/4 inch. <br>Action :- *The tube is inserted in the breech vent. *A lanyard is attached to the loop in)
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