Elevator Door Closing Mechanism

Miles is notable for being a black inventor and successful businessperson in 19th century america.

Elevator door closing mechanism.

The car doors have a clutch mechanism that unlocks the outer doors at each floor and pulls them open. An elevator door mechanism that has a rotating shaft a reversible driving means to turn the shaft a linear drive actuator riding on and moving along the shaft a resilient isolated pillow block mounted on spacers at each end of the shaft to dampen the noise of operation two elevator doors attached to the linear drive actuator and a switching means attached adjacent to one end of the. How the doors operate. G i joseph h burden i by march 11 1958 j.

E force necessary to prevent closing of the hoistway door or the car door or gate if power operated om rest shall not exceed 135 n. The computer turns the motor to open the doors when the car arrives at a floor and close the doors before the car starts moving again. The initial solution for an elevator car closing on limbs was a bumper edge that sensed when it came into contact with something solid and automatically reopened the door. Safety controls for elevator door closing mechanism filed june 15 1955 2 sheets sheet 1 inventor.

Alexander miles of duluth minnesota patented an electric elevator on october 11 1887. The operator and motor is located on top of the car. Closing mechanism shall be designed and installed to conform to 2 13 4 2 and the reopening device shall be designed and installed to conform to 2 13 5. Many elevators have a motion sensor system that keeps the doors from closing if somebody is between them.

As improvements were made electronic eyes came along working similar to those on garage doors. An elevator north american english or lift commonwealth english is a type of vertical cable transportation machine that moves people or freight between floors levels or decks of a building vessel or other structure. His innovation in the mechanism to open and close elevator doors greatly improved elevator safety. Of course there is an electric impulse from the elevator controller the brain of the elevator that causes an elevator door to open and close when the car is safely at the proper floor.

Elevators are typically powered by electric motors that drive traction cables and counterweight systems such as a hoist although some pump hydraulic fluid to raise a.