During the Roman Empire in Egypt, the Greek scholar Heron of Alexandria invented the first known automated door in the 1st century AD. During the time of Emperor Yang of Sui (r. 604-618), the first foot-sensor-activated mechanical door was built in China for his royal library. This device opened and closed depending on which part of the book being read by a visitor had been exposed to light.
The first electric door opener was patented in 1914 by Elwood Haynes and consists of an electric motor connected to a centrifugal governor that controls the flow of current to an electrical switch mounted on the door frame. This switch opens and closes the circuit connecting the motor to the wall outlet. The opening movement is provided by a coiled spring that returns the door to its original position when electricity is shut off. In 1936, Charles Peck and Edward Davis improved upon this design by adding a magnet to their electric door opener, which allowed the door to be opened from outside the house. This invention was commercially successful and has remained the standard configuration for door openers ever since.
In 1969, the first fully electronic digital door opener was introduced by Honeywell as part of their security system. It included a keypad for entry of a four-digit code, a sonic sensor that detected intruders sound, and a microcontroller that operated the motor and applied power to the sensors.
A Greek scholar invents the first automated door in the first century AD. China creates the first foot-sensor-activated automated door in the fifth century AD. Copper and bronze were utilized on doors in Medieval Europe from the sixth to the ninth centuries AD. Ornate panel and carved wood doors grace the grandest architecture from the 12th to the 15th century AD. Cast iron gates equipped with a lock appear around this time as well.
Iron doors came into use around 1400 AD. They are more durable than wooden doors and can also be used as a form of security against intruders. Steel doors became popular in the late 19th century and are now used almost exclusively.
The modern door operates on an open system where a key is required to open the door from without or within. The two main types of keys are house keys and door keys. House keys are used to access houses while door keys are used to open front doors. In some cases, such as with high-security homes, a door key may be required even to enter the home via the front door. If a house has multiple entrances, then multiple keys may be needed.
House keys usually contain several parts: a metal tag that is attached to the key when it is bought (this holds information about the owner), a cylinder for locking and unlocking the door, and a handle for turning the cylinder.
Door keys have only a tag that identifies the owner.
The first foot-sensor-activated automated door was created in China in the fifth century AD. In Medieval Europe, doors were made of copper or bronze. The nicest constructions include ornate panels and carved wood doors. But even these simple wooden doors could be opened from within by a servant or guest.
The first electric door opener was invented in 1911 by Elijah McCoy and has been improved upon since then. Today's door openers are powered either by electricity or by an internal combustion engine. They can be opened manually or automatically when someone approaches the door. Automatic door openers are useful for parking structures, where they ensure that no one drives into a space that is reserved for another vehicle.
In conclusion, the first automatic front door was developed in China in 514 AD.
Heron of Alexandria was a mathematician. You must return to the first century AD and the province of Roman Egypt. Heron of Alexandria, a mathematician, invented the first known automated door here. His invention was called an ekkyptikon or 'one that opens by itself'. It is not known exactly when or where he built this door, but it must have been before 50 BC because Caesar's assassination occurred in 10 BC.
Today, almost all doors are automated. They open and close automatically for people who cannot open them themselves (for example, those who are disabled or elderly) or for security reasons (to allow police officers access to buildings).
The first electric door opener was patented in 1911 by Elwood Haynes of Medford, Massachusetts. He called his invention "an electrical device for opening and closing double doors". That same year, Albert L. Soper of Chicago invented a gas-powered door operator that opened and closed steel doors at the Illinois State Fair.
The first magnetic door opener was developed by George de Mestral of San Jose, California. In 1997, his company, Mestral Technologies, introduced its first automated door system. The system used two pairs of magnets mounted on opposite sides of each door panel and a special receiver attached to the wall next to the door.
Egyptian tomb paintings from 4000 years ago included the first known history of doors. Nobody knows who developed the door; all that is known is that it initially appeared somewhere in central Egypt. But soon after its inception, people began to build houses and other structures with closed doors. These doors may have been made of wood or stone. It may also have been later when metal doors became available that they were used instead.
The ancient Egyptians built fine cities full of monuments and artifacts. They also created some ingenious devices that are still in use today. Such as the doorbell! The ancients used a bell attached to a cord which could be pulled to notify people of someone's arrival. This came in handy especially for servants at home who could let their masters or women know if there was anyone outside to welcome them.
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