Communications: electrical – Selective – Having indication or alarm
Patent
1980-12-10
1983-02-22
Trafton, David L.
Communications: electrical
Selective
Having indication or alarm
33125W, 324 58R, 340553, 340686, 343 12R, B66B 302, G01S 124
Patent
active
043750575
ABSTRACT:
Microwave signals are injected at one end of a slotted waveguide containing a shorting stub which is moved along the length of the waveguide. The distance to the shorting stub is determined from the comparative phase characteristics of the injected signals reflected back from the shorting stub.
REFERENCES:
patent: 2665420 (1954-01-01), Winterhalter
patent: 2947985 (1960-08-01), Cooley
patent: 3121955 (1964-02-01), King
patent: 3278922 (1966-10-01), Andrews
patent: 3560970 (1971-02-01), Kamimura et al.
patent: 4041495 (1977-08-01), Martin
Weise Andrew P.
Wisner George R.
Greenstien Robert E.
Otis Elevator Company
Trafton David L.
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