Abstract:
The mechanism according to the invention comprises an electric motor, a member adapted to be driven by the motor and kinematically linked with the door, and means for compensating at least partially the torque exerted by the weight of the door on this member. A brake interposed between the motor and the aforementioned member exerts against the motor a braking effort at least in the phases of displacement of the door where the combined effect of the weight of the door and of the effort exerted by the compensation means tends to displace this member in the same direction as the motor. The brake makes it possible to limit the variations of the torque to be exerted by the motor.
Abstract:
A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the type of door (single panel or segmented) and uses that information to set a maximum speed of door travel. The operator moves the door with a linearly variable speed from start of travel to stop for smooth and quiet performance. The operator provides for full door closure by driving the door into the floor when the DOWN limit is reached and no auto-reverse condition has been detected. The operator provides for user selection of a minimum stop speed for easy starting and stopping of sticky or binding doors.
Abstract:
A movable barrier operator having an electrical motor responsive to control signals for moving the barrier, a controller to control the barrier movements, and two command apparatuses for generating command inputs, which command apparatuses are located remotely from each other. The first command apparatus is mounted in a location remote from the controller and easily accessible by the users, and the second command apparatus is located close proximity to the controller to be easily accessible by an installer at the time of service.
Abstract:
A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the type of door (single panel or segmented) and uses that information to set a maximum speed of door travel. The operator moves the door with a linearly variable speed from start of travel to stop for smooth and quiet performance. The operator provides for full door closure by driving the door into the floor when the DOWN limit is reached and no auto-reverse condition has been detected. The operator provides for user selection of a minimum stop speed for easy starting and stopping of sticky or binding doors.
Abstract:
The invention relates to an actuator for operating an access door on an aeroplane, comprising a body (18) fitted with a motor member (20) and with a drive member (24) that is movable relative to the body (18) under the action of the motor member (20). The motor member (20) is an electric motor, and the mechanical means (22) of movement transmission are mounted inside the body (18) between the electric motor (20) and the drive member (24) to drive the said drive member (24) from the electric motor (20). The transmission means (22) comprise means (26) of mechanical disengagement of the electric motor (20) from the drive member (24), which, after disengagement, allow the drive member (24) to be moved independently of the electric motor (20).
Abstract:
A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the type of door (single panel or segmented) and uses that information to set a maximum speed of door travel. The operator moves the door with a linearly variable speed from start of travel to stop for smooth and quiet performance. The operator provides for full door closure by driving the door into the floor when the DOWN limit is reached and no auto-reverse condition has been detected. The operator provides for user selection of a minimum stop speed for easy starting and stopping of sticky or binding doors.
Abstract:
A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the type of door (single panel or segmented) and uses that information to set a maximum speed of door travel. The operator moves the door with a linearly variable speed from start of travel to stop for smooth and quiet performance. The operator provides for full door closure by driving the door into the floor when the DOWN limit is reached and no auto-reverse condition has been detected. The operator provides for user selection of a minimum stop speed for easy starting and stopping of sticky or binding doors.
Abstract:
A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the type of door (single panel or segmented) and uses that information to set a maximum speed of door travel. The operator moves the door with a linearly variable speed from start of travel to stop for smooth and quiet performance. The operator provides for full door closure by driving the door into the floor when the DOWN limit is reached and no auto-reverse condition has been detected. The operator provides for user selection of a minimum stop speed for easy starting and stopping of sticky or binding doors.
Abstract:
A drive-end gear wheel is engaged by a drive disc through an intermediate cushion that accepts slave bars of the driving disc and reinforcement ribs of the drive-end gear wheel. The reinforcement ribs couple an inner hub with an outer ring gear flange of the drive-end gear wheel. The reinforcement ribs are formed with transition curves that uniformly transmit tangential and radial deformation stresses to the outer ring gear flange, ensuring reliable and durable operation of the drive gear.
Abstract:
A door is provided having an automatic opening means for the door and a key locking facility for mechanically locking the door in a door closed position and electric circuit means connected with the motor means to sense a change in the electrical operating conditions of the motor above that which is normal for operation of the motor and to remove the above normal power thereby supplied to the motor in such circumstances.The sensing means preferably comprises a means which switches off the power once the electrical operating conditions are sensed above that which is normal and whereby it returns the power some time later and should the motor then reexperience electrical operating conditions above that which is normal the sensing means will again switch off the power to the motor.The sensing means desirably comprise a bimetallic cut out switch means.