Electrically actuated overhead garage door opener with solenoid

Details Electrically actuated overhead garage door opener with solenoid Electrically actuated overhead garage door opener with solenoid

1987-04-06

1988-09-13

Ro, Bentsu

Electricity: motive power systems

Supplied or controlled by space-transmitted electromagnetic...

49280, 49300, E05B 4700

Patent

active

047712180

ABSTRACT:
A garage door opener with solenoid latches is provided with a circuit for energizing the coils of the solenoid latches with power from a 24-volt step-down transformer, either as 120 volt power is applied to a motor to move the door in response to detection of an initial surge of current or as a manual or radio controlled command switch is actuated. In either case, current at a higher level is applied initially to pull in the armature locking pins of the solenoid latches, and thereafter at a lower hold-in level. A transformer with a single turn primary winding or a Hall-effect device may be used to detect the initial surge of current to the motor and in response thereto pull in the locking pins. Thereafter, hold-in current is applied as long as current to the motor is sensed. In the case of sensing actuation of a command switch, a first one-shot triggered by the command switch times the total period (16 seconds) during which the solenoid latches are provided with at least hold-in current, and a second one-shot triggered by the first one-shot at the beginning of its timing period, times a short (100 ms) period during which high, pull-in current is applied. The second one-shot may also be used to inhibit application of power to the motor during the pull-in time. Still other embodiments utilize a mechanical means for sensing when power has been applied to the motor by the door opener.

REFERENCES:
patent: 2770455 (1956-11-01), Brister
patent: 2800348 (1957-07-01), Parsley
patent: 2940292 (1960-06-01), Heath
patent: 2971755 (1961-02-01), Green
patent: 3154302 (1964-10-01), Maruyama
patent: 3319696 (1967-05-01), Wiegand
patent: 3344554 (1967-10-01), Misaka et al.
patent: 3429073 (1969-02-01), Tucker
patent: 3781622 (1973-12-01), Acton et al.
patent: 4001661 (1977-01-01), Terabayashi
patent: 4254582 (1981-03-01), McGee
patent: 4330958 (1982-05-01), Richmond
patent: 4549369 (1985-10-01), Foley, Jr.
patent: 4564791 (1986-01-01), Brickner
patent: 4668899 (1987-05-01), Ide et al.

Affiliated with

Also associated with

Rating

Electrically actuated overhead garage door opener with solenoid does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrically actuated overhead garage door opener with solenoid , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrically actuated overhead garage door opener with solenoid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-808169