Electricity: electrical systems and devices – Miscellaneous
Patent
1989-09-05
1990-10-09
Tolin, Gerald P.
Electricity: electrical systems and devices
Miscellaneous
333 27, 361356, 361394, 439578, 439424, 439428, H02B 700
Patent
active
049624474
ABSTRACT:
A radio frequency signal and power distribution duct system includes mating interconnections permitting daisy chaining of a plurality of individual units to provide as many power and radio frequency signal outlets as desired. Three types of units, types A, B, and C are contemplated. Type A units receive power and signal from external sources. Type B units receive power and signal from type A units, and permit daisy chaining additional type B or type C units. Type C units connect to type A or type B units but do not provide for further daisy chaining. External connection of radio frequency signals in type A and type B units is performed through internal one-eighth wavelength coaxial cables, whereby, when a type A and a type B unit are connected together, the total length of connecting coaxial cable is one-quarter wavelength. An external termination may be connected to a type A or type B unit at the end of a daisy chain. An internal termination is connected to the last coaxial Tee in a type C unit.
REFERENCES:
patent: 4032821 (1977-06-01), Keiser
patent: 4097894 (1978-06-01), Tanner
patent: 4307435 (1981-12-01), Ullman
patent: 4569567 (1986-02-01), Zucchini
patent: 4578702 (1986-03-01), Campbell, III
patent: 4810830 (1989-03-01), Komine
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