An example cable tension device is provided. The cable tension device includes a bracket, an arm, and a spring. The arm is rotatably coupled to the bracket and comprises a roller bar to receive a cable of an overhead door. The spring is coupled to the arm. The spring is under a load to cause the arm to rotate away from the bracket to maintain a tension on the cable.

A method of operating a door system includes receiving a signal from a pressure sensor disposed in a sill or a frame of the door system, authenticating the user after receiving the signal, shifting the lock from a locked configured to an unlocked configuration in response to receiving the signal after authenticating the user, and moving the door panel from a closed position to an ajar position in response to receiving the signal.

The disclosure relates to a method at a control device (100) for controlling an overhead door operator system, the overhead door operator system (1) being configured for opening and closing an opening (2), and comprising a door frame (3) comprising a first frame section (4) at a first side (7) of the opening (2) and a second frame section (6) at a second side (5) of the opening (2). The operator system further comprises a door (8) arranged to be moved between an open and closed (C) position, the door (8) being movably connected to the door frame (3) and a drive unit (10) mounted on the door (8), the drive unit (10) comprising at least one motor (11) arranged to move the door (8) from the closed position (C) to the open position (O). An elongated transmission member (19) extends along the first side (7) of the opening (2) and the first frame section (4). The drive unit (10) further comprises a driven transmission member (18) in driving connection with the motor (11). The method comprises the steps of: detecting door movement; determining if detected door movement relates to unexpected door movement; and, if so, taking action so as to prevent more extensive damages. The disclosure further relates to an overhead door operator system for opening and closing an opening.

A movable barrier operator system is provided. The system includes a control circuit, an electric motor; and communication circuitry. The control circuit is configured to control operation of the electric motor based on a control signal received by the communication circuitry.

In example implementations, a method is provided. The method includes determining, by a processor, that a vehicle is approaching a door of a building based on a velocity vector of the vehicle, calculating, by the processor, a time of arrival of the vehicle at the door based on the velocity vector of the vehicle and a distance of the vehicle from the door, and controlling, by the processor, the door to begin opening at a time based on the time of arrival and an amount of time for the door to open such that the door is opened when the vehicle arrives at the door.

The invention relates to a safety device for a lifting gate (1), in particular for a fast-running lifting gate (1) having a gate leaf (3) movable up and down and guided along both lateral gate opening edges in frames (10), a free leading edge (12) of the gate leaf (3) being assigned, at a distance (D) below the leading edge (12), to a photoelectric barrier (LS) which travels with the movement of the gate leaf (3), wherein the distance (D) can be reduced in a lower end region of a travel path of the gate leaf (3), and wherein at least a transmitting and/or a receiving unit and/or an opposite reflector unit of the photoelectric barrier (LS) is guided and/or arranged within a frame body (11) of the frames (10).

Disclosed is a door system comprising: at least one travelable door element; at least one running rail for guiding the door element; and at least one light barrier element for detecting a free travel path of the door element, wherein the at least one running rail has a cut-out at or in which the at least one light barrier element is fastened.

Disclosed is a bottom bracket assembly for a sectional door. Roller wheels engage with tracks along the sides of the doorway to support the door and guide it to move up and down or open and close the doorway. A lift cable connected with lift engagements may be provided to provide an upward bias to the motion of the door to offset the weight of the door. The roller wheels are supported by the bottom bracket assemblies connected at bottom portions of the edge stiles of the door. Each bottom bracket assembly has a bottom bracket fastened to the edge stile and a roller carrier that supports roller wheel. The connection between the roller carrier and the bottom bracket is adjustable to allow the wheel of the roller to be adjusted to a position outward of the edge of the door so that portions of the door, such as a lift bracket connected with the lift cable, do not interfere with the track.

In example implementations, an end cap for a panel of a vertically stacking panel door is provided. The end cap includes a body to be coupled to an end of a panel of a vertically stacking panel door, a first track wheel coupled to the body, a second track wheel coupled to the body, and a vertical stability roller coupled to the body, wherein the first track wheel, the second track wheel, and the vertical stability roller are arranged along a vertical line, wherein the first track wheel is located vertically above the second track wheel and the vertical stability roller is located between the first track wheel and the second track wheel.

A system for exerting torque on a shaft includes: a spring assembly having; a spring; a companion member to the spring, wherein at least one of the spring and the companion member is in compression and the other of the spring and companion member is in tension; connecting structure for transmitting a force associated with the spring outside of the gear assembly; and a gear train for connecting the connecting structure to the shaft to apply torque to the shaft. A method of exerting torque on a shaft includes: arranging a plurality of spring assemblies arranged in an array around the shaft, each spring assembly having; a spring; connecting structure for transmitting a force associated with the spring; attaching a gear train to the connecting structure; and configuring the gear train to apply the force associated with the spring to the shaft in the form of torque on the shaft.