Electricity: electrical systems and devices – Safety and protection of systems and devices – By regulating source or load
Patent
1976-01-28
1977-04-05
Moose, Harry
Electricity: electrical systems and devices
Safety and protection of systems and devices
By regulating source or load
321 21, 323 17, 361 59, 361 18, H02H 904
Patent
active
040164586
ABSTRACT:
An improved overvoltage protection circuit for cascaded radio frequency signal distributing amplifiers interrupts a power transmission path in an open circuit mode responsive to an overrange input power potential, and is automatically reset to its quiescent operative condition when the overvoltage condition abates. AC energy is coupled by the instant arrangement at a reduced level while the fault condition persists, such that the driven load is continuously energized.
In accordance with one aspect of the present invention, selective relatively essential ones of the distribution amplifiers, e.g. trunk amplifiers, can be maintained operative by a DC standby power supply during an AC line power hiatus. Correspondingly, other, less important amplifiers are automatically rendered inoperative during power faults to prevent excessive drain in the DC standby source.
REFERENCES:
patent: 3299321 (1967-01-01), Damon
patent: 3408552 (1968-10-01), Weber
patent: 3571608 (1971-03-01), Hurd
patent: 3742337 (1973-06-01), Digneffe
Jerrold Electronics Corporation
Moose Harry
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