US Army Keys
From Larry Nutting's list in Tom (W1TP) Perera's
"TELEGRAPH COLLECTOR'S GUIDE" - pg 81 Copyright 1999

No 9Assembly - Key & Plug
KY-116/UAssembly - POST 1945 J-45
J-1For use in the SCR-49 (BC-24) - 1915
J-25.5 x 3.25 x 1.75" Black base key used in above set
J-35-5/32 x 3-3/8" Wood Base. Folding British-style key
J-4A Silenced key
J-5/J-5ARound, Flameproof Aircraft key
J-64-1/16 x 1-3/4" Black base, British-style Aircraft key
J-7J-5A on a base with a blinker light, Aircraft key
J-1ØTransmitting key
J-11Flameproof, silenced key with rubber buffers
J-123.5 x 2.5" Brass sub-base, for field radios
J-14Folding adjustable key, used with BC-47
J-15Brass-Based , Bunnell key used in EE-15 Buzzer Set
J-16Strap key used in EE-1Ø Signal Lamp Set
J-17Unmounted contacts for attachment to panel
J-18MESCO Oval legless key for EE-21 Field Set
J-19Sliding switch, connects telephone lines together
J-2Øtelephone line switch, dpst
J-21Strap key used in target range signalling
J-22Small strap key with upper, lower and ccenter contacts
J-236-5/8 x 3-1/2 x 1/2" black base wireless telegraph key. Heavy brass 7-3/4 x 5/26" lever.
J-2415-1/2 x 6 x 1-1/2" base oil break wireless key
J-258.5 x 4.5 x .75" slate base wireless key for SCR-41, 1KW set.
J-26Small wireless key mounted on 12-7/8 x 9 x 3-3/8" wooden box.
J-27Small wireless key mounted on 12-1/4 x 4-3/8 x 3-1/4" wooden box.
J-285-1/4 x 2-7/8 x 3-1/4" open circuit leg key.
J-295-1/4 x 2-7/8 x 3" closed circuit leg key.
J-3Ø5-1/4 x 2-3/4 x 1-1/2" closed circuit legless key.
J-316-1/4 x 3-5/8 x 4" open and closed circuit leg key.
J-32J-3Ø on a 5 X 3" Wodden base
J-335-1/8 x 2-5/8 x 2-3/4" open circuit legless key
J-343-7/8 x 1-7/8 x 9/16" wood base for signaling lamp EE-6A
J-355-3/4 x 2-7/16 x 9/16" wood base for signaling lamp EE-6A
J-363.5 x 6.375" High Speed vibrating bug Vibroplex, Lionell, Bunnell, Brooklyn Metal, etc...
J-375-3/16 x 2-5/8" Ovoid Moulded bakelite base
J-385-1/4 x 3 X 1-1/2" bakelite base, (J-3Ø open circuit key)
J-4ØFor field set SCR-163A
J-415-1/4 x 2-5/8 x 7/8" like J-37 but with back contact for TG-5
J-435-1/4 x 2-3/4 x 1-1/2" J-37 on base with push switch
J-445-1/4 x 2-3/4 x 1-1/2" J-37 on base with shorting switch
J-455-3/16 x 2-5/8 x 1" metal base J-37 on a metal leg clip Later models were marked KY-116/U
J-464-3/8 x 2" phenolic base. Strap key for EE-84 signal lamp
J-475 x 2-3/4 x 1-1/4" bakelite base
J-484 x 5-5/8 X 1-1/2" metal base in olive drab box, for BC-654
J-49Automatic code keyer, keys oscillator for identification
J-51Hand-held and hand-operated scissors-like key, for signal lamp M-227. It allowed the operator to stand safely away from the signal light while sending.