PA Ametek Inc ., Sellersville, won a $ 77, 840 contract from the Defense General Supply Center, Richmond, Va ., for position indicators.
32.
When it was finally patented in 1970, it was given the catchy name of " X-Y Position Indicator for a Display System ."
33.
The group was responsible for the first plan position indicator ( PPI ) ever built, and they were granted two patents for their work.
34.
The radar had a single parabolic antenna was on the roof, and a plan-position indicator CRT was used, the first such in New Zealand.
35.
In search mode the SCR-584 rotated its antenna through 360 degrees and any returns were plotted on a plan position indicator ( PPI ).
36.
Later, with the advent of plot extraction it could be displayed alongside the aircraft on the traditional Plan position indicator ( PPI ) display.
37.
Engelbart patented the mouse in 1970 for the Stanford Research Institute, under the unwieldy name " X-Y Position Indicator for a Display System ."
38.
Aircraft Instruments Co . of Doylestown won a $ 61, 525 contract from the Defense General Supply Center in Richmond, Va ., for position indicators.
39.
The other trailer carried the Zone Position Indicator, a 150-MHz ( 2-m ) radar that found the position of all aircraft within the system's coverage.
40.
While usually a computer controls this with Pulse Position Indicators, any belt not controlled must be monitored to ensure accuracy and reduce the likelihood of problems.
