<s>
The	O
cathode-ray	B-Application
tube	I-Application
amusement	I-Application
device	I-Application
is	O
the	O
earliest	O
known	O
interactive	B-General_Concept
electronic	O
game	O
as	O
well	O
as	O
the	O
first	O
game	O
to	O
incorporate	O
an	O
electronic	O
display	O
.	O
</s>
<s>
The	O
device	O
simulates	O
an	O
artillery	O
shell	O
arcing	O
towards	O
targets	O
on	O
a	O
cathode-ray	B-Device
tube	I-Device
(	O
CRT	O
)	O
screen	O
,	O
which	O
is	O
controlled	O
by	O
the	O
player	O
by	O
adjusting	O
knobs	O
to	O
change	O
the	O
trajectory	O
of	O
a	O
CRT	O
beam	O
spot	O
on	O
the	O
display	O
in	O
order	O
to	O
reach	O
plastic	O
targets	O
overlaid	O
on	O
the	O
screen	O
.	O
</s>
<s>
Therefore	O
,	O
despite	O
its	O
relevance	O
to	O
the	O
early	B-Application
history	I-Application
of	I-Application
video	I-Application
games	I-Application
,	O
it	O
is	O
not	O
generally	O
considered	O
a	O
candidate	O
for	O
the	O
title	O
of	O
the	B-Application
first	I-Application
video	I-Application
game	I-Application
.	O
</s>
<s>
The	O
cathode-ray	B-Application
tube	I-Application
amusement	I-Application
device	I-Application
consists	O
of	O
a	O
cathode-ray	B-Device
tube	I-Device
(	O
CRT	O
)	O
connected	O
to	O
basic	O
oscilloscope	O
type	O
circuitry	O
with	O
a	O
set	O
of	O
knobs	O
and	O
switches	O
.	O
</s>
<s>
The	O
cathode-ray	B-Application
tube	I-Application
amusement	I-Application
device	I-Application
was	O
invented	O
by	O
physicists	O
Thomas	O
T	O
.	O
Goldsmith	O
Jr.	O
and	O
Estle	O
Ray	O
Mann	O
.	O
</s>
<s>
The	O
pair	O
worked	O
at	O
television	O
designer	O
DuMont	O
Laboratories	O
in	O
Passaic	O
,	O
New	O
Jersey	O
specializing	O
in	O
the	O
development	O
of	O
cathode	B-Device
ray	I-Device
tubes	I-Device
that	O
used	O
electronic	O
signal	O
outputs	O
to	O
project	O
a	O
signal	O
onto	O
television	O
screens	O
.	O
</s>
<s>
The	O
two	O
inventors	O
were	O
inspired	O
by	O
the	O
radar	B-Application
displays	O
used	O
in	O
World	O
War	O
II	O
,	O
which	O
Goldsmith	O
had	O
worked	O
on	O
during	O
the	O
war	O
.	O
</s>
<s>
Despite	O
being	O
a	O
game	O
that	O
used	O
a	O
graphical	O
display	O
,	O
the	O
cathode-ray	B-Application
tube	I-Application
amusement	I-Application
device	I-Application
is	O
generally	O
not	O
considered	O
under	O
many	O
definitions	O
to	O
be	O
a	O
candidate	O
for	O
the	B-Application
first	I-Application
video	I-Application
game	I-Application
,	O
as	O
it	O
used	O
purely	O
analog	O
hardware	O
and	O
did	O
not	O
run	O
on	O
a	O
computing	O
device	O
;	O
some	O
loose	O
definitions	O
may	O
still	O
consider	O
it	O
a	O
video	O
game	O
,	O
but	O
it	O
is	O
still	O
usually	O
disqualified	O
as	O
the	O
device	O
was	O
never	O
manufactured	O
.	O
</s>
<s>
Nevertheless	O
,	O
it	O
is	O
the	O
earliest	O
known	O
interactive	B-General_Concept
electronic	O
game	O
to	O
incorporate	O
an	O
electronic	O
display	O
,	O
as	O
no	O
prior	O
games	O
,	O
such	O
as	O
the	O
1936	O
Seeburg	O
Ray-O-Lite	O
,	O
had	O
such	O
a	O
display	O
or	O
primarily	O
used	O
electronic	O
components	O
—	O
ones	O
which	O
modify	O
an	O
electrical	O
signal	O
,	O
rather	O
than	O
simply	O
using	O
electricity	O
as	O
power	O
.	O
</s>
<s>
This	O
makes	O
the	O
cathode-ray	B-Application
tube	I-Application
amusement	I-Application
device	I-Application
a	O
forerunner	O
to	O
other	O
games	O
in	O
the	O
early	B-Application
history	I-Application
of	I-Application
video	I-Application
games	I-Application
.	O
</s>
<s>
The	O
patent	O
itself	O
was	O
not	O
discovered	O
again	O
until	O
2002	O
,	O
when	O
David	O
Winter	O
,	O
a	O
French	O
electronics	O
collector	O
,	O
while	O
searching	O
for	O
evidence	O
of	O
early	O
prototypes	O
of	O
the	O
1972	O
Magnavox	B-Device
Odyssey	I-Device
console	O
,	O
found	O
the	O
patent	O
in	O
a	O
set	O
of	O
documents	O
in	O
an	O
archival	O
warehouse	O
originally	O
compiled	O
for	O
a	O
1974	O
lawsuit	O
by	O
Magnavox	O
against	O
several	O
arcade	O
game	O
companies	O
.	O
</s>
