US PATENT SUBCLASS 396 / FOR 750
.~.~.~ Having bridge circuit (354/450)

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

FOR 710  DF  AUTOMATIC EXPOSURE CONTROL SYSTEM OR DEVICE (354/410) {8}
FOR 746  DF  .~ Having circuit for controlling diaphragm only (354/446) {7}
FOR 749  DF  .~.~ Direct drive galvanometer type (354/449) {1}
FOR 750.~.~.~ Having bridge circuit (354/450)

DEFINITION

Classification: 396/FOR.750

Having bridge circuit: (354/450)

Subject matter under subclass FOR 749 in which the circuit contains a network having two terminal pairs one of which is connected to a galvanometer and arranged such that when power is fed to one terminal pair, by suitable adjustment of the elements in the network, zero output is obtained at the terminal pair connected to the galvanometer.