Abstract:
A fusible link dropout or disconnect device for a motor-operated fire door which is advantageously located on the motor shaft and is an integral part of the chain drive by which the motor operator powers the fire door support shaft through rotation to correspondingly urge the fire door through opening and closing movements. The chain drive, consisting of the usual endless loop of chain entrained about spaced-apart sprockets, functions effectively while permitting a degree of lateral shifting movement of the dropout which is utilized as the disconnecting movement thereof in the event of a fire.
Abstract:
An active break release device externally attached to a door controller. The door controller includes a housing for receiving a first motor which rotates a rotary shaft to reel the door; a braking device installed around the periphery of the rotary shaft. The active break release device comprises: at least a brake releasing rod, one end of which is to activate the braking device while the other end of which extends to the outside of the door controller; at least a second motor, for moving the other end of the brake releasing rod; a circuit having a backup power source used to temperately supply electricity to the second motor if electricity fails, so that the one end releases the braking.
Abstract:
A power-off door closing device of fire proof rolling door in which the rolling door slides down to close by its own weight under abnormal power-off condition by brake-releasing action or by brake-applied action of a braking pin actuated by a energized solenoid, through successive movement of the first end of a sliding lever of a solenoid with a bent arm, a clamp member and a brake actuating rod. This device can be easily changed into non-failsafe door closing fire proof type with original configurations wherein the solenoid is reverse located so that the brake-released action caused by an energized solenoid or the brake-applied action under abnormal power-off condition applies. A reserved power supply temporarily energizes the solenoid to maintain a temporary brake-releasing under abnormal power-off condition, to enable the rolling door sliding down to close by its own weight.
Abstract:
A parking area control and management system employs a card reader, which reads identification information from a card commonly carried by a person, such as a driver's license or credit card or other identity card carried by a user that is issued by an entity other than a parking area management entity. A record is made of the identification information upon entrance of a vehicle into the parking area. The person may subsequently leave the parking area on foot and regain entry to the parking area by presenting the same card. Later, the same card is used to exit the parking area, via the vehicle, and to validate that the same person is leaving with the vehicle. The parking area control and management system also includes sensors, such as loop detectors and electric eyes, to determine if a second vehicle or a pedestrian follows behind a vehicle entering into, or exiting from, the parking area. The parking area control and management system can be used to manage existing loop detectors and electric eyes, that normally control door and gate safety access systems, and to integrate those devices into an alarm system, such that an alert is issued whenever an abnormal or unauthorized event occurs during operations.
Abstract:
A non-contact sensor system controls movement of a door moving in a first direction. The system includes a rigid mounting bracket attached to a leading edge of the door, a transmitter extending a distance beyond a leading edge of the door at a first door end for transmitting a signal toward a second door end. The transmitter is attached to the rigid mounting bracket by a first moveable member configured to engage a surface when the door closes and moving to a retracted position. The sensor system further includes a receiver extending a distance beyond the leading edge of the door at the second door end in alignment with the transmitter for detecting the signal and for generating an output signal. The receiver is attached to the rigid mounting bracket by a second moveable member configured to engage the surface when the door closes and moving to the retracted position.
Abstract:
A smoke release and ventilation system comprises a frame housing upper and lower members each slidable in the frame between a normally closed position and an open position, the upper member being retained in its upper position by retaining element, for example an electromagnetic, the upper member being heavier than the lower member whereby, on release of the retaining, the upper member falls under gravity to its open position, and, consequential upon said fall of the upper member and the kinetic energy thereof, the lower member is raised to its open position, thereby providing gaps above and below the members and through which smoke can escape.
Abstract:
A non-contact sensor system controls movement of a door moving in a first direction. The system includes a rigid mounting bracket attached to a leading edge of the door, a transmitter extending a distance beyond a leading edge of the door at a first door end for transmitting a signal toward a second door end. The transmitter is attached to the rigid mounting bracket by a first moveable member configured to engage a surface when the door closes and moving to a retracted position. The sensor system further includes a receiver extending a distance beyond the leading edge of the door at the second door end in alignment with the transmitter for detecting the signal and for generating an output signal. The receiver is attached to the rigid mounting bracket by a second moveable member configured to engage the surface when the door closes and moving to the retracted position.
Abstract:
A door, such as a fire door or a security gate, for blocking a throughway or opening in an exterior or interior wall of a building, such as a doorway or countertop window, has an open position and a closed position. A force, such as gravity, a counter weight or a spring, tends to move the door toward its closed position. In the case of the fire door, a disengageable stop holds the door in its open position. The disengageable stop includes a brake actuator for releasing a brake. An expandable linkage, having a normal length and having an elongate length when an external force is applied thereto, has a first end connected to the brake actuator. A second end of the expandable linkage is connected to a fire condition sensitive device, which releases the second end upon a fire indicative condition. With the fire door, or any other type of door, a DC generator is connected to the door and produces power as the door moves from its open position to its closed position. A DC motor is also connected to the door and has an ability to move the door from its closed position to its open position. A first power terminal is connected to the motor, and adapted to receive a second terminal of a portable, rechargeable DC battery.
Abstract:
A non-contact sensor system controls movement of a door moving in a first direction by actuation of a device. The system includes a transmitter extending a predetermined distance beyond a leading edge of the door at a first door end for transmitting a signal toward a second door end. The transmitter is attached to the door by a first movable member which is capable of engaging a surface when the door closes and moving to a retracted position. The sensor system further includes a receiver extending a predetermined distance beyond the leading edge of the door at the second end in alignment with the transmitter for detecting the signal, and for generating an output signal when the signal is blocked. The receiver is attached to the door by a second movable member which is capable of engaging the surface when the door closes and moving to the retracted position.