His office was equipped with recording devices ( on tapes and discs ), bugs, detectors, transparent mirrors, periscopes for indirect observation and sensitive photoelectric cells.
42.
Baird achieved this, where other inventors had failed, by obtaining a better photoelectric cell and improving the signal conditioning from the photocell and the video amplifier.
43.
This was a curious design, one where the scanning electron beam would strike the photoelectric cell from the same side where the optical image was cast.
44.
Starting in the early 1900s, biologists began experimenting with cameras triggered by trip wires and, later, photoelectric cells to photograph tigers, bats, birds and other wildlife.
45.
In one appearance he explained a proposal for attaching a series of photoelectric cells to the 30m high flank wall of the Piccadilly Plaza Tower in Manchester.
46.
In addition, the Manhattan Project severely strained even the most accurate mechanical calculators, which were Rube Goldberg devices that used motors, generators, photoelectric cells and vacuum tubes.
47.
As travelers pass by, photoelectric cells will trigger sounds ranging from a score of frogs croaking in the Everglades to a flute gently playing in the wind.
48.
The varying brightness of the point where the spot fell reflected varying amounts of light, which was converted to a proportionally varying electronic signal by the photoelectric cells.
49.
As attested by his doctoral dissertation of 1926, earning him a PhD from the University of Pittsburgh, his experiments were directed at improving the output of photoelectric cells.
50.
In the 1960s, Cunningham and his dancers generated sound when they passed in front of photoelectric cells set up on stage in " Variations V, " which also used film.
