Electricity: motive power systems – Automatic and/or with time-delay means – Plural – diverse conditions or with time-delay means
Patent
1981-05-08
1983-07-19
Weldon, Ulysses
Electricity: motive power systems
Automatic and/or with time-delay means
Plural, diverse conditions or with time-delay means
318471, 318476, 318469, H02P 116
Patent
active
043946070
ABSTRACT:
A control system for operating a bidirectional gate driven by a reversible electric motor includes an overload protection circuit to prevent motor current overload produced by gate obstructions and the like. The system includes control switches for operating gate opening and gate closing circuits which respectively energize the motor for rotation in opposite directions. The safety circuit includes a motor current sensing device and a first comparator which compares the level of sensed motor current with a temperature adjusted, selectable reference value and delivers a motor disabling signal to the opening and closing circuits if the sensed value exceeds the reference level. The safety circuit also includes a second comparator which compares the sensed current level with another reference value to produce the disabling signal in the event that the selected reference value of the first comparator is incorrect.
REFERENCES:
patent: 3254289 (1966-05-01), Hartman
patent: 3513374 (1970-05-01), Koment
patent: 3851216 (1974-11-01), Clarke et al.
patent: 3868554 (1975-02-01), Konrad
patent: 3891909 (1975-06-01), Newson
patent: 3912976 (1975-10-01), Sons et al.
patent: 4177492 (1979-12-01), Noddings et al.
patent: 4217616 (1980-08-01), Jessup
patent: 4325095 (1982-04-01), Hart
Stanley Automatic Openers
Weldon Ulysses
LandOfFree
Control systems for gates and the like including a motor overloa does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control systems for gates and the like including a motor overloa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control systems for gates and the like including a motor overloa will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-753415