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DuMont introduced this set in 1938, months before RCA first sold
sets. This is the early 1939 version of the DuMont 180. It has a 8 x
10 inch picture, and sold for $395. (Information courtesy of Tom
Genova).
This set is very similar to the Cossor 137T, made two years earlier.
DuMont imported several Cossor sets in 1937, and apparently copied
many of the features. The CRT is almost identical, with electrostatic
deflection. The power supplies are very similar. DuMont did use more
modern (octal) tubes (valves) than the Cossor, and the DuMont set has
a 4 channel tuner, while the Cossor is a single channel set. It would
be interesting to know if DuMont entered into a license agreement
with Cossor, or simply "stole" the designs.
Recently, we received a letter from Jerry King, Director of the
DuMont Project, which says:
In November of last year, I interviewed Thomas T. Goldsmith, Jr.,
head of R & D for DuMont from its early days until the end. The
November interview was one in a series I have conducted with him over
the past eighteen months.
According to my audio recording of this session, Dr. Goldsmith
states that Allen B. DuMont was in Britain "in 1936 or 1937"
and sent back a Cossor set. He said the DuMont Lab took it apart and
duplicated it with domestic parts, improving "some of the
circuits." When asked whether or not a cross-licensing or other
agreement was arranged with Cossor, Dr. Goldsmith flatly answered,
"No, we didn't do that."
