the life of Philo T Farnsworth - Early Television Foundation

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Televising
Motion Pictures
of objects from life very difficult.
THE LACK of sensitivity
in the transmitter tube made the pickup
Farnsworth therefore determined
that the next step
in his program was to transmit motionpicture
film successfully. This presented many and varied problems.
The characteristics of the scanning process of a television
transmitter tube and the operation of a motion-picture projector
had to be reconciled. It was found that it was not feasible
to transmit motion pictures by the use of the "shutter" type
of motion-picture projector.
To those unfamiliar with the operation of the motion-picture
projector it is necessary to explain that the action is produced
by flashing onto the screen, at the rate of twenty-four pictures
per second, the individual frames which make up the film. The
film is fed into the projector a frame at a time at the rate indicated.
Each separate frame stops momentarily while it is flashed
on the screen. While the next picture
is
being brought into
place the screen is darkened by a shutter, so that during twofifths
of the time in the ordinary projection of cinema film the
screen is dark. The eye, which continues to the register image
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