Keys of the USSR Allies
J-5-A - Flameproof straight key of US Signal Corps. Key
contacts were completely enclosed to allow J-5-A to be used in
explosive environments without the danger of the contact
sparks igniting an explosion.
be continued after the picture set...
J-5 family of flameproof telegraph keys was manufactured in the USA from about
1918. This J-5-A key was made by L.S.Brach Mfg Co. Another key that we have in
our collection, Key for No.48 Set
which actually was a J-5-A key with a toggle switch added, was made by Western Electric.