Release mechanism and method with alarm circuit

Details Release mechanism and method with alarm circuit Release mechanism and method with alarm circuit

1990-12-14

1992-01-21

Moore, Richard E.

Closure fasteners

Bolts

Swinging

160209, 292DIG36, E05C 312

Patent

active

050823167

ABSTRACT:
Release mechanism and method for fire doors and the like. The door is normally held in an open position by an electrically energized actuator and is released for closing upon deenergization of the actuator. An eneergizing current is supplied to the actuator from a source to energize the actuator, and a limited amount of energy from the source is stored in an element such as a capacitor. Upon interruption of the current from the source to the actuator, the actuator is energized with the stored energy to prevent the door from closing for a limited period of time after the current is interrupted. An alarm circuit is included in some embodiments to porivde a warning when the current has been interrupted and the door is about to close.

REFERENCES:
patent: 2327778 (1943-08-01), Ferris et al.
patent: 2607586 (1952-08-01), Schlytern
patent: 3309664 (1967-03-01), Deutsch et al.
patent: 3426829 (1969-02-01), McDaniel et al.
patent: 3576119 (1971-04-01), Harris
patent: 3955840 (1976-05-01), Rawls et al.
patent: 4328985 (1982-05-01), Logan
patent: 4470625 (1984-09-01), Walsh et al.
patent: 4995651 (1991-02-01), Wardlaw

Affiliated with

Also associated with

Rating

Release mechanism and method with alarm circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Release mechanism and method with alarm circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Release mechanism and method with alarm circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-112376