[CW] Vibroplex patent for amended dash hinge

[Richard Knoppow]

    As discussed in the I Love Bugs Zoom. The patent is
USP1,445,226
Filed Dec. i0, 1921  Issued Feb. 13, 1923.
    This shows the bent over ears forming the hinge. Gives at least some 
clue as to when the change in production was made. The older type hinge 
is shown in patent
USP 842,154     Issued JAN. 22 1907 Filed April 16, 1906
    I think this is the oldest patent for the "Original" pattern. 
J.H.Bunnell had a large number of patents for various telegraph items 
including automatic keys, the original Steel Lever key, various 
sounders, etc., etc.
-- 
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998