The Chamberlain Group, Inc.

M&s Systems, L.p.

Bradford Lowell Farris

James Joseph Fitzgibbon

Paul E Wanis

John Victor Moravec

Terence E Crimmins

Stephen Robert Tomassetti

Donald C Snedigar

Colin B Willmott

Thomas Gerald Wojciechowski

Ronald W Halley

A rolling code transmitter is useful in a security system for providing secure encrypted RF transmission comprising an interleaved trinary bit fixed code and rolling code. A receiver demodulates the encrypted RF transmission and recovers the fixed code and rolling code. Upon comparison of the fixed and rolling codes with stored codes and determining that the signal has emanated from an authorized transmitter, a signal is generated to actuate an electric motor to open or close a movable barrier.

Rolling code security system

A peer-to-peer network of devices connected together with data being streamed over a digital network. Network devices include one or more data communication units that are locatable in two or more zones. Data communication units may be room stations and door stations connected to hub modules at an entertainment hub and local units connected to the entertainment hub. The entertainment hub may be connected to the Internet, either directly or, indirectly through one of the connected data communications units. Room stations include a sending unit, a receiving unit and an intercom unit (provide intercom, paging and station monitoring) and are located in different zones, each controlling local reception of data from the data stream and each may place data into the data stream. Room stations operate independently of each other such that a person at a first room station may select to receive audio data from another unit while a second person at a second room station is receiving data from yet another unit, each individually setting sound volume and tone controls independent of the other. Audio sources may include a radio tuner, a compact disc player, a mini-disc player, a microphone, a cassette player and a compressed audio data source and, any unit may select audio data from any audio source independent of other units. Room stations may include an interactive display and keypad with commonly used commands in a command menu. A time display may be included and stations may be time programmable. Some units may selectively disable issuance of commands from other network devices.

Digital multi-room, multi-source entertainment and communications network

A radio frequency transmitter for use in generating coded commands learned from received coded radio frequency signals. An transceiver circuit including a switching element and a tunable filter tuning element is coupled to a programmable controller, e.g, a microprocessor. The programmable controller operates the switching element of said transceiver circuit in either a first or a second mode for receiving or transmitting coded radio frequency signals, respectively via an antenna coupled to the tuning element. The switching element is operable in the first mode to demodulate received coded radio frequency signals, and the programmable controller learns the received coded radio frequency signals and stores coded commands in memory. In the second mode of operation, an oscillator is modulated by generated coded signals from the programmable controller using the stored coded commands from memory. The generation of plural coded radio frequency commands with the single radio frequency transmitter unit facilitates the learning, responsive to a received radio frequency signal, of an additional coded radio frequency command for additional door and gate operators.

Multi-frequency radio frequency transmitter with code learning capability

A movable barrier operator includes a wall control switch module having a learn switch thereon. The switch module is connectable to a control unit positioned in a head of a garage movable barrier operator. The head unit also contains an electric motor which is connected to a transmission for opening and closing a movable barrier such as a garage door. The switch module includes a plurality of switches coupled to capacitors which, when closed, have varying charge and discharge times to enable which switch has been closed. The control unit includes an automatic force incrementing system for adjusting the maximal opening and closing force to be placed upon the movable barrier during a learn operation. Likewise, end of travel limits can also be set during a learn operation upon installation of the unit. The movable barrier operator also includes an ambient temperature sensor which is used to derive a motor temperature signal, which motor temperature signal is measured and is used to inhibit motor operation when further motor operation exceeds or is about to exceed set point temperature limits.

Movable barrier operator having force and position learning capability

A barrier movement actuating receiver learns and responds to fixed code type access codes and rolling code type access code wherein the actuating receiver includes a programmer for programming the actuating receiver to accept fixed or rolling type access codes and includes a learning mode for enabling the programmer to add valid access codes to a memory. The receiver further includes a controller for identifying the type of access code received and a revised access code routine for learning both fixed codes and rolling codes. The controller can be set to execute the access code routine corresponding to the type of access code identified. After the first code is learned, all subsequent codes learned must be of the same type until the programmer is re-enabled.

Growing community of inventors

Chicago, IL, United States of America

Bradford Lowell Farris