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Image
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Source
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Observations
from the source
|
|
|
Gallenkamp
(1930s)
|
Resistance coils
|
|
|
Gallenkamp
(1930s)
|
Low resistance shunt
|
|
|
Gallenkamp
(1930s)
|
Divided megohm
|
|
|
Gallenkamp
(1930s)
|
Carbon megohm
|
|
|
Gallenkamp
(1930s)
|
Anode resistance
|
|
|
Gallenkamp
(1930s)
|
Plug resistance box
|
|
|
Gallenkamp
(1930s)
|
Post office box, Davies’ improved
pattern
|
|
|
Gallenkamp
(1930s)
|
Ratio arms
|
|
|
Gallenkamp
(1930s)
|
Lamp resistance
|
|
|
Gallenkamp
(1930s)
|
Lamp resistance
|
|
|
Gallenkamp
(1930s)
|
Resistance frame
|
|
|
Gallenkamp (c.
1939)
|
SERIES RESISTANCE BOX, Davies’ Pattern,
Patent No. 411523.
|
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Gallenkamp (c.
1939)
|
RESISTANCE BOXES, Dial Pattern
|
|
|
Gallenkamp (c.
1939)
|
PLUG RESISTANCE BOXES, Davies’ Improved
Pattern
|
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|
