PHOTOMATIC TELEPHONE EQUIPMENT CLOSE-UP
Photo Electric Cells
Dr. Phillips Thomas, research engineer of the Westinghouse Electric
and Manufacturing Company, first connects the apparatus with an electric
circuit by dialing a certain number.
Then by putting a voice impulse into the standard telephone transmitter
he causes the camera shutter, just below the light, to open.
This permits a light beam to shoot through the lens in the lower
end of the device.
When the light beam strikes a light-sensitive tube across the room,
house lights are extinguished, a fan may be turned on or off and other
PHOTO ## 198241
Original Caption by Science Service