[CW] Vibroplex patent for amended dash hinge

[Richard Knoppow]

    Its interesting that in 842,154 the dash hinge pin is shown but not 
numbered or referred to in the text (unless I missed it). It may even be 
hard to spot if you are not familiar with the construction of the key 
and may also be difficult to understand what it is from the drawings. In 
1,445, 226 the arrangement of the hinge is the main claim of the patent 
and its shown clearly. I've looked for another patent but couldn't find 
one and don't think there is one. Prior art shows patents by Martin and 
others for partly electrical bugs, 842,154 seems to be the earliest 
Martin patent for a completely mechanical bug.
     My reference to Bunnell is OK but I meant to comment that Horace 
Martin, the inventor of the common bug, had many patents. I had just 
copied a Bunnell patent and had the name in my mind.

On 3/13/2024 10:39 PM, Richard Knoppow wrote:
>     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