|A garage door opener is a motorized device that opens and closes garage doors. Most are controlled by switches on the garage wall, as well as by remote controls carried in the garage owner's cars
The electric opener
The electric overhead garage door opener was invented by C.G. Johnson in 1926 in Hartford City, Indiana. Contrary to popular belief, the electric opener does not provide the actual lifting power to open and close a heavy garage door. Instead, most of the actual lifting power comes from the counterbalance springs that are under tension to lift the garage door via steel counterbalance cables. The electric opener only controls how far the door opens and closes, as well as the force the garage door exerts. In most cases, the garage door opener also acts as a lock.
The typical electric garage door opener consists of a power unit that contains the electric motor. The power unit attaches to a track. A trolley connected to an arm that attaches to the top of the garage door slides back and forth on the track, thus opening and closing the garage door. The trolley is guided along the track by a chain, belt, or screw that turns when the motor is operated. A quick-release mechanism is attached to the trolley to allow the garage door to be disconnected from the opener for manual operation during a power failure or in case of emergency. Limit switches on the power unit control the distance the garage door opens and closes once the motor receives a signal from the remote control or wall push button to operate the
The entire assembly hangs above the garage door. The power unit hangs from the ceiling and is located towards the rear of the garage. The end of the track on the opposite end of the power unit attaches to a header bracket that is attached to the header wall above the garage door. The power head is usually supported by punched angle iron.
The first garage door opener remote controls were simple and consisted of a simple transmitter (the remote) and receiver which controlled the opener mechanism. The transmitter would transmit on a designated frequency; the receiver would listen for the radio signal, then open or close the garage, depending on the door position. The basic concept of this can be traced back to World War II. This type of system was used to detonate remote bombs. While novel at the time, the technology ran its course when garage door openers became widely available and used. Then, not only did a person open their garage door, they opened their neighbor’s garage door as well. While the garage door remote is low in power and in range, it was powerful enough to interfere with other receivers in the area.
The second stage of the wireless garage door opener system deals with the shared frequency problem. To rectify this, systems required a garage door owner to preset a digital code via dip switches on the receiver and transmitter. While these switches provided garage door systems with 28 = 256 different codes they were not designed with high security in mind; the main intent was to avoid interference with similar systems nearby.
The third stage of garage door opener market uses a frequency spectrum range between 300-400 MHz and most of the transmitter/receivers rely on hopping or rolling code technology. This approach prevents perpetrators from recording a code and replaying it to open a garage door. Since the signal is supposed to be significantly different from that of any other garage door remote control, manufacturers claim it is impossible for someone other than the owner of the remote to open the garage. When the transmitter sends a code, it generates a new code using an encoder. The receiver, after receiving a correct code, uses the same encoder with the same original seed to generate a new code that it will accept in the future. Because there is a high probability that someone might accidentally push the open button while not in range and desynchronize the code, the receiver generates look-a-head codes ahead of time.
The fourth stage of garage door opener systems is similar to third stage, but it is limited to the 315 MHz frequency. The 315 MHz frequency range avoids interference from the Land Mobile Radio System (LMRS) used by the U.S. military.
Grapevine is a city in Tarrant County, Texas, United States and a suburb of Fort Worth. It was known in its early years as Grapevine Prairie. An extremely small portion of the modern city of Grapevine extends into neighboring Denton and Dallas counties. As of the 2000 census the city population was 42,101, though the 2006 U.S. Census Bureau estimate puts the city's population at 48,583. The city is named for wild mustang grapes prevalent in the
area (the high school football team is named the Mustangs). In recent years several wineries have opened in Grapevine, and the city has been very active in maintaining its historic downtown area. The city is adjacent to Grapevine Lake, a large reservoir impounded by the Corps of Engineers in 1952. Part of Dallas/Fort Worth International Airport, which serves the cities of Dallas and Fort Worth, is located inside the city limits of Grapevine. In 2007 CNNMoney.com rated Grapevine as one of "America's Best Places to Live
In October 1843, General Sam Houston and fellow Republic of Texas Commissioners camped at Tah-Wah-Karro Creek, also known as Grape Vine Springs, to meet with leaders of 10 Indian
nations. This meeting culminated in the signing of a treaty of “peace, friendship, and commerce,” which opened the area for settlement by homesteaders and pioneers. The settlement was named Grapevine because of its location on the Grape Vine Prairie near Grape Vine Springs, both of which were named for the wild mustang grapes that blanketed the
The first recorded settlement in what would become the city of Grapevine occurred in the late 1840s and early 1850s. The Confederate general Richard Montgomery Gano had property there. The site of his farm is now the location for Dallas/Fort Worth International Airport. Growth during the 19th century was slow but steady; by 1890 the town had about 800 residents, along with such amenities as a newspaper, a public school, several cotton gins, a post office and a railroad. Growth continued early in the 20th century, and on January 12, 1914 the post office changed the town name to the one-word title Grapevine, after the area had been known by several other names.
Tags Dallas Garage door spring replacement Automatic Battery backup Batteries Beeping Belt drive Belts Bent
Brace Broken Buy Cables Circuit Boards Clicker Coils Collection Companies Company contemporary Control Controller Custom Damaged Do it yourself that does Electric Emergency Find Fixes For Sale Free Estimates Garage Doors Gear Kits Gears Hand Hardware Hinges Homes Horse Power 1/2 3/4
Keys Keyless Entry Lights Flashing Local Modern New off Track Openers Operators Order Overhead Garage Doors panels Parts Quotes Radio Receiver Remote Controls Remotes (Clickers) Replace Replacement Repair Residential Retail Rollers Safety Beams Same Day Sections Sensors Service Self Sells Series Shaft showroom Solar Spray Grease Stores Struts Support Springs steel Stuck in
Texas TX Torsion Tracks transmitter trouble Weather strip Wood carriage house Wholesale
41A2817 Able Access Master Amarr, Classica, Oak Summit, Heritage, Stratford Belt Drive Blue Max Chamberlain chi
C.H.I. Clopay, Avante Evercharge battery Excelerator Genie Intellicode Linear Lift-Master Liftmaster Garage Door Openers Liftmasters Marantec Multi Code Multicode
Security + Plus Sears Craftsman Openers Stanley Wayne-Dalton Whisper Drive Windsor where can I buy a garage door spring garage door won't go down or up Where? When? Why?