Abstract: A sensor element for opening of doors and gates, with the aim being to allow production of a detection field for identification of people and/or static objects by means of an antenna element, the antenna element is intended to have a flat antenna unit, with a pin-like antenna projecting at least approximately vertically from the flat antenna unit.

Abstract: A device and method for operating an optoelectronic safety sensitive edge (100) for the safeguarded motor-driven movement of a gate having a closing edge (141). The device has a deformable, hollow, elastic profile (110), a light transmitter device with a light transmitter (121a), and a transmitter control system (121b), by means of which at least one operating parameter of the light transmitter (121a) can be adjusted, a light receiver device (122) with a light receiver, the light transmitter device and the light receiver device (122) being coupled optically and electrically by the transfer of dynamic signals, an optical, dynamic coupling signal (K2, K2?, K2?) within the hollow profile (110); and an evaluating device (130) with means for detecting an electric, dynamic coupling signal (K2, K2?, K2?), the evaluating device (130), generating a release signal in response to the detected, dynamic, electric coupling signal.

Abstract: An automatic barrier operator system for operating a gate or upward acting garage door, for example, includes a controller for operating a reversible motor, a base radio frequency transmitter and a base radio frequency receiver. One or more remote control units include a radio frequency remote receiver and remote transmitter. The controller is operable to automatically close or open the barrier in response to a query signal sent from the base transmitter to the remote receiver and when the remote receiver is within range, returning a signal to effect operation of the barrier. The system is operable to effect operation or maintain the status quo of the barrier depending on the state of the barrier and a particular signal or lack of signal received by the controller from an authorized remote control unit or units. The system provides essentially hands-free automatic operation of opening and closing a garage door and the like.

Abstract: A door actuating system has a fractional horsepower motor mounted on the door adjacent its free edge, driving a clutch connected to a duplex capstan pulley that is wrapped by two tensioned flexible static lines, for opening/closing movement ‘along the line’. The motor also drives a gear that engages a rack projecting from the door frame, to displace the door relative to its frame. Rotation of the gear is read by a rotary encoder, which feeds a microprocessor, to continuously monitor the location, speed and direction of motion of the door, for both the ‘on’ and the ‘off’ condition of the electric motor. A latching clip over-rides action of the original door latch.

Abstract: A system for reducing sun glare through an opening into a space, the system comprising an electrically controllable window treatment operable to alter the amount of daylight entering the space through the opening; a first sensor mounted within the space and characterized by a sensor gain, the first sensor operable to sense a level of illumination in the space; and a control system operable: to compare the sensed illumination level in the space to a dead-band having upper and lower thresholds; to adjust during a time period when glare from the sun can occur through the opening at least one of: (a) the upper threshold of the dead-band, (b) the lower threshold of the dead-band, and (c) the sensor gain of the first sensor; and to adjust the window treatment in response to the sensed level of illumination to reduce the sun glare.

Abstract: A device with a memory function for detecting closure of vehicle doors and the method thereof is disclosed. Before a vehicle door is open, a detecting signal near the outer side of the door is emitted and its detection status is recorded. When the vehicle door is to be closed, a First detecting signal is emitted from the door frame top downwards and a second detecting signal is emitted near the outer side of the door. If the first detecting signal indicates that a person is at the door or the second detecting signal indicates that a person exists on the outer side of the door by comparison with a precious record, then the door is prohibited from being closed. Otherwise, the door can be closed. This automatic detection method can prevent the driver from accidentally hurt passengers by carelessly closing the doors.

Abstract: A method of managing a plurality of operable wall panels in a room equipped with an overhead track system from which the panels suspend and in which the panels are movable to selectively partition the room, the track system including a reading portion. The method comprising providing an identification tag on each of the plurality of panels, each identification tag having panel information, and wirelessly communicating between the identification tag of each of the plurality of panels and a controller, wherein the controller being operable to receive and transmit panel control data comprising the panel information.

Abstract: A rotating barrier for a gateway (5) has a rotatable blocking element (2) having a single blocking arm (1) which blocks the gateway (5) in the blocking position and is rotated between the blocking positions by 360° in each case. Further provided are an access authorization reader (7) and a people sensor (8) whose detection area (9) is located in front of the blocking arm (1) in the blocking position thereof.

Abstract: The invention relates to a device and a method for identifying an object O in an opening that can be closed by means of a mobile element (12). Light is fed into at least one fiber-optic light guide (33, 34) from a light source (1, 2), and variations in the received light are detected by means of at least one receiver (Ea, Eb), the fiber-optic light guide being arranged at least partially along the edge of the opening (11). A first fiber-optic light guide sends light transversally to the length thereof, said light being then received by a second fiber-optic light guide transversally to the length thereof. The second fiber-optic light guide (34) is connected to the receiver (Eb). The fiber-optic light guides are arranged on the edge of the opening (11) in such a way that a light field (F) at least partially bridging the opening is produced.

Abstract: An actuating mechanism for a door includes a first antenna block having a first integrated microcontroller electrically connected to a first transceiver device and a first antenna. A second antenna block having a second integrated microcontroller is electrically connected to a second transceiver device and a second antenna. A processor device is electrically connected between the first and second microcontrollers and a first switch. The first and second antennas receive a first radio frequency signal from a third, mobile transceiver device. The processor device measures a time difference of arrival (TDOA) of the first radio frequency signal. The processor device computes a direction of arrival (DOA). The DOA measurement is compared against a predefined range of DOAs. The processor device sends a control signal to the first switch to actuate the door in the event of a match.

Abstract: A first moveable barrier is actuated by using a first moveable barrier operator. Responsive to the receipt of a signal initiating actuation of the first moveable barrier, a wireless signal is transmitted from the first moveable barrier to a second moveable barrier operator. The signal is received at the second moveable barrier operator and the second moveable barrier operator is controlled in response to receiving the signal.

Abstract: An elevator shaft door having a door panel composed of a front wall and rear wall, which walls are connected together by a thermally releasable material, wherein at least a part of the closing edge of the respective door panels consists of a profile member that is formed by the back wall or thermally non-detachably fastened to the back wall. In the case of a fire, the back wall separates from the front wall through release of the thermally releasable material, wherein the front wall curves by heat effect while the back wall with the closing edge retains the original shape.

Abstract: A method of managing a plurality of operable wall panels in a room equipped with an overhead track system from which the panels suspend and in which the panels are movable to selectively partition the room, the track system including a reading portion. The method comprising providing an identification tag on each of the plurality of panels, each identification tag having panel information, and wirelessly communicating between the identification tag of each of the plurality of panels and a controller, wherein the controller being operable to receive and transmit panel control data comprising the panel information.

Abstract: A movable barrier operator (10) has a wireless status condition data transmitter (15) that wirelessly transmits status condition messages to one or more remote peripherals (20). The latter can in turn use this status information to effect their own functionality and supported features.

Abstract: A small, substantially spherical, free-flying utility platform for use in space can be docked, inspected and serviced in an apparatus including a container with a chamber therein mounted on the outside of a space vehicle or space station. A motorized closing mechanism drives a door to selectively open or close an opening of the container into the chamber, and another mechanism automatically latches and locks the door. The door operations can be automatically triggered as the platform breaks the beams of light beam devices arranged in the container. The proper positioning of the platform in the container can be detected by a photoelectric switch. Capture and docking of the platform is facilitated by sloping funnel-shaped interior walls of the container, and properly shaped cushions and/or a docking cradle. When docked, the platform has its batteries recharged, its fuel tank refueled, and its electronics evaluated and diagnosed.

Abstract: A radiation transmitting or sensing element is placed in a generally elongated holder of resilient material so that, if it is distorted by an accidental impact or otherwise, it will automatically re-orient itself when the intruding force is released. The invention is especially useful in safety accessories for automatic overhead doors, garages, and the like.

Abstract: A method, system and computer program product for adaptively tracking the position of an entry portal, such as an automatic garage door. In accordance with the present invention a transmitter assembly senses and transmits the sensed position of the door position in a periodic manner at a predetermined transmit interval. A receiver assembly including a receiver module receives the transmitted door position signals and synchronizes the activation of the receiver module with the transmit interval such that the receiver receives the door position signals transmitted at the predetermined transmit interval. A receiver output indicator is then updated in accordance with the entry portal position determined by the received door position signal.

Abstract: A door system includes an antenna-based proximity sensor with a releasable electrical connector that enables the sensor to function with a breakaway feature of the door. The sensor includes a signal generator and a door-mounted antenna for sensing a body or an obstruction near the door. The signal generator (or oscillator) can be installed at various locations between a power source and the antenna. In some cases, the wiring between the antenna and the power source includes a rotatable feature to accommodate the rotation of a drum that carries a wrap-up, pliable door panel. The rotatable feature may be a rotatable electrical connector, or it may be a wire having sufficient length and flexibility to twist about itself within the hollow interior of the drum.

Abstract: A solid state programmable timer attaches with two wires across the two contacts for the key circuit of the PC board controlling a security gate and two wires to the emergency personnel remote key switch. A timed cycle is activated by an emergency personnel key opening the security gate. When the timed cycle ends the timer causes the closing of the security gate allowing it to resume normal operation without the need for the emergency personnel key. The timer is pre-programmed with the amount of time normally required for an emergency operation.

Abstract: A door opening and closing apparatus has a motor, a door latch and a power generation mechanism. When the voltage of the battery is below a level needed to drive the electric actuator, a predetermined manipulation of the power generation mechanism generates the power needed to drive the motor. Therefore, when the voltage of a battery that supplies electric power to the electric actuator is below a level needed to drive the electric actuator, the door opens.

Abstract: An automatic door opening system utilizing wireless links to communicate from hazard or obstruction sensors to a controller to react to such conditions. The present invention allows the use of hazard, fault or obstruction switching devices which themselves utilize internal continuity monitoring in a wireless environment. Compressible hazard switch sensors which utilize internal, continuous conducting elements are continually monitored for breaks in such elements through continuity checks. A signal is generated from the wireless transmitter during door operation to indicate to the system that the link between the wireless transmitter and a wireless receiver is fully functioning at all times. The system can determine if an actual obstruction hazard is detected or if there is a loss of communications between the wireless transmitter and receiver link in the disclosed system while also allowing for wireless continuity checking between sensor switches utilized.

Abstract: A vehicle door includes an openable window and a detector with a charge-coupled device sensor. The sensor detects the light distribution proximate to a closing line of the window. If an obstruction is present, the light distribution received by the sensor varies. The light distribution received by sensor is compared with a reference distribution to detect if an obstruction is present. If an obstruction is detected, movement of the window is stopped, allowing any obstruction in the path of the window.

Abstract: An electrically operated fast-food service window with a plurality of upwardly focused infrared emitter/receivers mounted on the fast-food service window in a manner such that the emitter/receivers emit infrared beams at an angle slightly askew of an imaginary vertical plane. The sensors are used to reliably detect an employee in the immediate proximity of the fast-food service window as the employee bends over the horizontal service shelf adjacent to and attached to the fast-food service window as the employee begins to reach towards a customer. The sensors, although focused towards the interior of a building, do in not detect employees or traffic in the immediate vicinity of the fast-food service window thereby virtually eliminating the unintentional opening of the window. The uniquely oriented sensors are connected to an electric motor operator which opens the window as an employee prepares to deliver merchandise or other items to a customer.

Abstract: A door system includes an antenna-based proximity sensor with a releasable electrical connector that enables the sensor to function with a breakaway feature of the door. The sensor includes a signal generator and a door-mounted antenna for sensing a body or an obstruction near the door. The signal generator (or oscillator) can be installed at various locations between a power source and the antenna. In some cases, the wiring between the antenna and the power source includes a rotatable feature to accommodate the rotation of a drum that carries a wrap-up, pliable door panel. The rotatable feature may be a rotatable electrical connector, or it may be a wire having sufficient length and flexibility to twist about itself within the hollow interior of the drum.

Abstract: A system includes a transmitter, a receiver, and a processor. The processor detects a trigger event. In response to the trigger event, the transmitter transmits a detection signal. If the receiver receives a reflected detection signal, the processor determines that a door is in a first position. Additionally, if the receiver receives a reflected detection signal, the processor signals an opener to move the door to a second position.

Abstract: A method, system and computer program product for adaptively tracking the position of an entry portal, such as an automatic garage door. In accordance with the present invention a transmitter assembly senses and transmits the sensed position of the door position in a periodic manner at a predetermined transmit interval. A receiver assembly including a receiver module receives the transmitted door position signals and synchronizes the activation of the receiver module with the transmit interval such that the receiver receives the door position signals transmitted at the predetermined transmit interval. A receiver output indicator is then updated in accordance with the entry portal position determined by the received door position signal.

Abstract: In a multiple barrier movement operator environment, one switch module for controlling all of the barrier movement operators. The switch module may be wall mounted for convenience and communicates with the barrier operator either wirelessly or through a wired interface. The switch module controls and operates movement of any barrier singly while controlling the operation of the overhead lights and response inhibit modes of all the barrier operators. A stop button also maybe provided to enable all the barrier operators to discontinue movement of their respective barriers.

Abstract: A sensor arrangement for monitoring a spatial area of least one motor-driven wing of a door includes a plurality of primary transmitters emitting beams of radiation toward a spatial area, and a plurality of primary receivers arranged to receive radiation from the primary transmitters which is reflected in the spatial area, the receivers generating a signal to actuate the motor driving the wing. A plurality of auxiliary transmitters are arranged next to respective primary receivers and emit auxiliary beams of radiation toward the spatial area, and a plurality of auxiliary receivers are arranged next to the primary transmitters to receive radiation from the auxiliary transmitters. A transmitter emits radiation and a receiver reacts to a reflection of the beam differing in intensity and produces a signal which controls the actuation of the door.

Abstract: A system for opening and closing a garage door is provided. The system includes a vehicle communication module mounted to a vehicle, and a garage communication module, the vehicle communication module and the garage communication module preferably performing Bluetooth™ communication. On the basis of the communication of a vehicle identifier and engine state information, a garage door can be automatically opened and closed.

Abstract: A system for decoupling a barrier from a barrier movement apparatus for the manual operation of the barrier. Advantageously, the decoupling is performed in response to a wireless signal and may be done only when the barrier is determined to be in a safe position.

Abstract: The invention relates to a building or security closure device (2), more particularly door (2), included a wing (3) powered by a motor assembly (23) and a monitoring or controller means (15) for controlling or monitoring travel of the door leaf (3), the monitoring or controller means (15) comprising a first, stationary electrotechnical unit (12, 13) and a second movable electrotechnical unit (5-10, 16) traveling with the wing (3) for communicating with the stationary unit (12, 13).

Abstract: A method and system for controlling the speed of security gate depending on its length is disclosed. It includes a system for determining the length of a gate that the system is working with and which automatically sets the speed of movement of the gate based on length. The system works automatically so that human intervention is not necessary to set the optimal speed once installed.

Abstract: Emergency release burglar bars having electronic locks that are actuated remotely by a signal generated by a smoke detector alarm provide security and will automatically unlock upon detection of smoke in the premises without human intervention to allow safe exit from the premises, and easy access and entry to the premises by emergency personnel. When the smoke detector/alarm senses smoke in the premises, its alarm is “powered on” to sound the alarm. A relay connected with the alarm circuit is activated simultaneously with the sounding of the alarm, which activates an “unlock” switch of a transmitter connected with the relay to transmit an RF “unlock” signal. Receivers on each of the electronic locks receive the transmitted signal, and activate an actuator, which actuates a mechanism to retract the bolt of the lock, allowing the burglar bars to be swung open.

Abstract: Auxiliary sensors 51 and 52 are disposed on exterior and interior side surfaces 31 and 32 of a transom 3. The sensors 51 and 52 have detection areas A1, A2, B1 and B2 which extend through the doorway 2 and which cross each other in a space vertically above a track 10. While detection signals are produced by both auxiliary sensors 51 and 52, the door is kept open. If detection signals are produced from only one of the auxiliary sensors 51 and 52 uninterruptedly for a predetermined time, the door closing action is allowed to start.

Abstract: A system for signaling the position of a movable barrier includes a movable barrier; a motor coupled to the movable barrier for moving the movable barrier between limit positions; a position detection device that monitors the movable barrier to generate a barrier position signal; and an indication device that receives the barrier position signal and indicate a position of the movable barrier relative to the limit positions. The system also includes an operation mechanism for controlling the motor and at least one transmitter device which generates a transmission signal received by the operator mechanism to energize the motor. The system further includes a blocking switch which generates a blocking signal received by the operator mechanism to prevent receipt of a transmission signal from a device other than one associated with the indication device.

Abstract: An optical axis adjuster 7 is provided to change the optical axis direction of a transmitter unit having a transmitter element 65. A restriction member 9 is latched in an external thread 71 which is formed in the outer circumferential surface of the adjuster 7. The adjuster 7 is held by a rotation/revolution support member 74 and rotatable around its central axis O. The rotation/revolution support member 74 is rotatable around a rotation axis 8 extending perpendicularly to the central axis O. Stepped adjustment of the optical axis is effected by revolving the adjuster 7 around the revolution axis 8 such that the restriction member 9 climbs over a thread ridge. Stepless adjustment of the optical axis is conducted by moving the adjuster 7 in cooperation with its rotation around the central axis O, with the restriction member 9 keeping a latched engagement with a thread groove.

Abstract: An apparatus for shutting off power to a gate motor is disclosed when the gate to which the gate motor is connected is opened or closed manually. In a preferred embodiment a sensor is activated that immediately shuts off power to the gate motor upon insertion of a crank into a receptacle on a pulley of the power driven gate movement system to commence manual opening or closing of the gate with the crank. Rotation of the crank in the appropriate direction either opens or closes the gate. Power is restored to the gate motor when the sensor determines that the crank has been withdrawn from the pulley.

Abstract: A door opening and closing apparatus has a motor, a door latch and a power generation mechanism. When the voltage of the battery is below a level needed to drive the electric actuator, a predetermined manipulation of the power generation mechanism generates the power needed to drive the motor. Therefore, when the voltage of a battery that supplies electric power to the electric actuator is below a level needed to drive the electric actuator, the door opens.

Abstract: A system and method are disclosed for enabling the selective monitoring of various regions of an aperture having a powered closure operative therein. Each of plural, individually selectable emitters is adapted to provide a narrow beam whose angle with respect to a horizontal plane is offset from the other emitters. All of the radiated beams lie in substantially the same plane in azimuth. A controller responds to certain stimuli to selectively activate one or more of the emitters. The energy thus produced is monitored by a receiver preferably disposed within the same housing. The receiver output is analyzed by the controller to identify the presence of an obstacle in that portion of the aperture illuminated by the selected emitter(s). A variety of systems may provide input to the controller for the purpose of influencing which of the plural emitters are to be activated for object detection.

Abstract: An object sensor for use with an automatic swing door includes a light emitter, which is mounted on a door surface of the automatic swing door. The light emitter emits a light beam toward a floor. A distance detector is mounted on the door surface. The distance detector receives the light beam reflected from an object and develops an output signal having a value representing the distance of the object from the distance detector. A control unit makes a judgment based on the value of the output signal of the distance detector as to whether the object is approaching the door surface. The control unit stores the value of the distance detector output signal representing the distance between the distance detector and the floor, as a reference value. A dead zone is defined for the reference value to extend from the floor to a predetermined distance above the floor. When the value of the distance detector output signal is outside the dead zone, the control units judges the object to be approaching the door surface.

Abstract: A lockable sliding window apparatus includes sliding window units having respective vertical frame members that are coupled at a closed configuration. Inner and outer segments of one frame member receive the other frame member therebetween. A combination dial lock is mounted to the outer segment and includes a lock pin extending through therethrough. The lock pin is immovable when the combination lock is locked and vice versa. A window pin extends through the outer segment of the one frame member and through the other frame member for locking the other frame member in place. When the combination lock is unlocked, the lock pin may be user actuated to release the window pin for opening the window units. Another embodiment includes an electronic keypad by which a user may enter a security code. Proper entry actuates a solenoid to retract a lack pin that may otherwise lock the window units together.

Abstract: A pet door unit (10) for mounting in a structure (100) , is described. The unit includes a housing (12) , an opening mechanism (22) , a door (18) , a receiver (36) and a transmitter (38) . The door is mounted parallel to the rear wall (12D) of the housing in guide rails (16) extending along the sidewalls (12C) of the housing. The opening mechanism includes a motor (24) having a screw drive (26) and a carriage (34) which is movably mounted on the screw drive. The carriage is connected to the top of the pet door and moves along the length of the screw shaft (28) as the shaft rotates to open and close the door. To open the door, a user presses a button (38A) on the portable transmitter which sends a signal to the receiver. When the receiver receives the signal, it activates the opening mechanism which activates the motor to rotate the screw drive to move the carriage and the door up the shaft to the open position.

Abstract: An automatic barrier operator system for operating a gate or upward acting garage door, for example, includes a controller for operating a reversible motor, a base radio frequency transmitter and a base radio frequency receiver. One or more remote control units include a radio frequency remote receiver and remote transmitter. The controller is operable to automatically close or open the barrier in response to a query signal sent from the base transmitter to the remote receiver and when the remote receiver is within range, returning a signal to effect operation of the barrier. The system is operable to effect operation or maintain the status quo of the barrier depending on the state of the barrier and a particular signal or lack of signal received by the controller from an authorized remote control unit or units. The system provides essentially hands-free automatic operation of opening and closing a garage door and the like.

Abstract: There is a lock release apparatus for providing delayed passage past a movable barrier such as an exit door which is held to a closed position by a lock. The apparatus includes a beam transmitter, a beam receiver, a timer for releasing the lock after a predetermined delay, a trigger associated with the timer and a beam reflector affixed to an operating bar on the movable barrier. In use of the apparatus when the barrier is closed and locked the transmitter directs a beam onto the reflector at an orientation such that reflection is detected by the beam receiver when the operating bar is undisturbed. Subsequent movement of the operating bar to open the barrier terminates or shifts the reflection away from the receiver to trigger the timer to release the lock after the predetermined delay.

Abstract: A motorized shutter assembly includes a frame having a pair of parallel spaced frame members, louver slats extending between the frame members and having shafts extending into and pivotably seated in the frame members. A coupling is engaged with the louver slats to produce concurrent pivotal movement of the louver slats in either direction. An adapter on one of the frame members has a drive portion engaged with the end of a louver slat and is rotatable to effect pivotal movement of the slats in either direction. The adapter is engaged with a reversible drive motor assembly to effect rotation of said adapter and the adapter also desirably provides a clutch to protect the drive motor assembly.

Abstract: A pet door unit having a housing, an opening mechanism, a pet door, a receiver and a portable transmitter. The opening mechanism includes a motor having a screw drive and a carriage. The carriage is connected to the top of the pet door and moves along the length of a screw shaft of the screw drive as the shaft rotates to open and close the door. A detector is mounted on each of the sidewalls of the housing to detect an object in the opening of the housing and prevent the door from closing when an object is detected in the opening. To open the door, a user presses a button on the portable transmitter which sends a signal to the receiver which activates the opening mechanism to move the door to the open position.

Abstract: Method of detecting obstructions encountered by a motorized door. The method includes providing a signal processor with one or more signals indicative of a predetermined door trajectory profile for at least a segment of a stroke of the door, the door trajectory profile providing an ideal speed and/or position versus an elapsed time since a beginning of the segment of the stroke. A door position signal from a position encoder for the door is received into the signal processor. The method includes generating one or more signals indicative of the velocity and/or position of the door from the door position signal and generating a trajectory discrepancy signal based on the velocity and/or position in relation to the ideal speed and/or position. A motor control signal is generated based on the trajectory discrepancy signal and the motor control signal is connected to motor control circuits connected to drive the motor for the door.

Abstract: In the foreign object insertion detector device, the light (infrared rays) is transmitted into the internal space 13 of a tube body 11 implanted into a weather strip 9 and formed of elastic material and, if there occurs the insertion of a foreign object, then the foreign object produces a pressing force and applies the pressing force to the tube body 11 to thereby deform the tube body 11. If the tube body 11 is deformed in this manner, then the quantity of the light transmitted through the internal space 13 is caused to decrease. By judging whether a decrease in the quantity of the light transmitted through the internal space 13 is present or absent, the insertion of the foreign object can be detected.

Abstract: A system and an associated method of detecting an object in a three-dimensional field adjacent to a doorway, such as an elevator doorway, uses an array of energy emitters that emit three-dimensional energy signals into the field and an array of energy receivers that receive the energy signals reflected from the object. The signals are sampled a predetermined number of times. In one embodiment, if the lowest value sampled signal reaches a predetermined threshold, an object detection signal is generated. In an alternative embodiment, if the sampled signals are within a predetermined variance range, the object detection signal is generated. In another alternative embodiment, if a predetermined modulation code is detected within a sampled signal, the object detection signal is generated.

Abstract: The present invention comprises a system for remote control of garage doors and other devices wherein an extremely large number of codes are available for remote transmitters for operating the garage operator and wherein each transmitter has its own unique and permanent nonuser changeable code. The receiver at the garage door operator is capable of storing and remembering a number of different codes corresponding to different transmitters such that the receiver can be programmed so as to actuated by more than one transmitted code thus allowing two or more transmitters to actuate the same garage door operator and wherein the receiver stores the valid codes for the different transmitters.