The Improved Elevator Invention of Alexander Miles

The Improved Elevator Invention of Alexander Miles Alexander Miles of Duluth, Minnesota patented an electric elevator on October 11, 1887. His innovation in the mechanism to open and close elevator doors greatly improved elevator safety.  Miles is notable for being a  black inventor  and successful business person in 19th Century America.   Elevator Patent for Automatic Closing Doors The problem with elevators at that time was that the doors of the elevator and the shaft had to be opened and closed manually. This could be done either by those riding in the elevator, or a dedicated elevator operator.  People would forget to close the shaft door. As a result,  there were accidents with people falling down the elevator shaft. Miles was concerned when he saw a shaft door left open when he was riding an elevator with his daughter. Miles  improved the method of the opening and closing of elevator  doors and the shaft door when an elevator was not on that floor.  He created an automatic mechanism that closed access to the shaft by the action of the cage moving. His design attached a flexible belt to the elevator cage. When it went over drums positioned at the appropriate spots above and below a floor, it automated opening and closing the doors with levers and rollers. Miles was granted a patent on this mechanism and it is still influential in elevator design today. He was not the only person to get a patent on automated elevator door systems, as John W. Meaker was granted a patent 13 years earlier. Early Life of Inventor Alexander Miles Miles was born in 1838 in Ohio to Michael Miles and Mary Pompy and is not recorded as having been a slave. He moved to Wisconsin and worked as a barber. He later moved to Minnesota where his draft registration showed he was living in Winona in 1863. He showed his talents for invention by creating and marketing hair care products. He met Candace Dunlap, a white woman who was a widow with two children. They married and moved to Duluth, Minnesota by 1875, where he lived for more than two decades. They had a daughter, Grace, in 1876. In Duluth, the couple invested in real estate, and Miles operated the barbershop at the upscale St. Louis Hotel. He was the first black member of the Duluth Chamber of Commerce. Later Life of Alexander Miles Miles and his family lived in comfort and prosperity in Duluth. He was active in politics and fraternal organizations. In 1899 he sold real estate investments in Duluth and moved to Chicago. He founded The United Brotherhood as a life insurance company that would ensure black people, who were often denied coverage at that time. Recessions took a toll on his investments, and he and his family resettled in Seattle, Washington. At one time it was believed he was the wealthiest black person in the Pacific Northwest, but that did not last. In the last decades of his life, he was again working as a barber. He died in 1918 and was inducted into the National Inventors Hall of Fame in 2007.

The Improved Elevator Invention of Alexander Miles

The Improved Elevator Invention of Alexander Miles Alexander Miles of Duluth, Minnesota patented an electric elevator on October 11, 1887. His innovation in the mechanism to open and close elevator doors greatly improved elevator safety.  Miles is notable for being a  black inventor  and successful business person in 19th Century America.   Elevator Patent for Automatic Closing Doors The problem with elevators at that time was that the doors of the elevator and the shaft had to be opened and closed manually. This could be done either by those riding in the elevator, or a dedicated elevator operator.  People would forget to close the shaft door. As a result,  there were accidents with people falling down the elevator shaft. Miles was concerned when he saw a shaft door left open when he was riding an elevator with his daughter. Miles  improved the method of the opening and closing of elevator  doors and the shaft door when an elevator was not on that floor.  He created an automatic mechanism that closed access to the shaft by the action of the cage moving. His design attached a flexible belt to the elevator cage. When it went over drums positioned at the appropriate spots above and below a floor, it automated opening and closing the doors with levers and rollers. Miles was granted a patent on this mechanism and it is still influential in elevator design today. He was not the only person to get a patent on automated elevator door systems, as John W. Meaker was granted a patent 13 years earlier. Early Life of Inventor Alexander Miles Miles was born in 1838 in Ohio to Michael Miles and Mary Pompy and is not recorded as having been a slave. He moved to Wisconsin and worked as a barber. He later moved to Minnesota where his draft registration showed he was living in Winona in 1863. He showed his talents for invention by creating and marketing hair care products. He met Candace Dunlap, a white woman who was a widow with two children. They married and moved to Duluth, Minnesota by 1875, where he lived for more than two decades. They had a daughter, Grace, in 1876. In Duluth, the couple invested in real estate, and Miles operated the barbershop at the upscale St. Louis Hotel. He was the first black member of the Duluth Chamber of Commerce. Later Life of Alexander Miles Miles and his family lived in comfort and prosperity in Duluth. He was active in politics and fraternal organizations. In 1899 he sold real estate investments in Duluth and moved to Chicago. He founded The United Brotherhood as a life insurance company that would ensure black people, who were often denied coverage at that time. Recessions took a toll on his investments, and he and his family resettled in Seattle, Washington. At one time it was believed he was the wealthiest black person in the Pacific Northwest, but that did not last. In the last decades of his life, he was again working as a barber. He died in 1918 and was inducted into the National Inventors Hall of Fame in 2007.

The Improved Elevator Invention of Alexander Miles

The Improved Elevator Invention of Alexander Miles Alexander Miles of Duluth, Minnesota patented an electric elevator on October 11, 1887. His innovation in the mechanism to open and close elevator doors greatly improved elevator safety.  Miles is notable for being a  black inventor  and successful business person in 19th Century America.   Elevator Patent for Automatic Closing Doors The problem with elevators at that time was that the doors of the elevator and the shaft had to be opened and closed manually. This could be done either by those riding in the elevator, or a dedicated elevator operator.  People would forget to close the shaft door. As a result,  there were accidents with people falling down the elevator shaft. Miles was concerned when he saw a shaft door left open when he was riding an elevator with his daughter. Miles  improved the method of the opening and closing of elevator  doors and the shaft door when an elevator was not on that floor.  He created an automatic mechanism that closed access to the shaft by the action of the cage moving. His design attached a flexible belt to the elevator cage. When it went over drums positioned at the appropriate spots above and below a floor, it automated opening and closing the doors with levers and rollers. Miles was granted a patent on this mechanism and it is still influential in elevator design today. He was not the only person to get a patent on automated elevator door systems, as John W. Meaker was granted a patent 13 years earlier. Early Life of Inventor Alexander Miles Miles was born in 1838 in Ohio to Michael Miles and Mary Pompy and is not recorded as having been a slave. He moved to Wisconsin and worked as a barber. He later moved to Minnesota where his draft registration showed he was living in Winona in 1863. He showed his talents for invention by creating and marketing hair care products. He met Candace Dunlap, a white woman who was a widow with two children. They married and moved to Duluth, Minnesota by 1875, where he lived for more than two decades. They had a daughter, Grace, in 1876. In Duluth, the couple invested in real estate, and Miles operated the barbershop at the upscale St. Louis Hotel. He was the first black member of the Duluth Chamber of Commerce. Later Life of Alexander Miles Miles and his family lived in comfort and prosperity in Duluth. He was active in politics and fraternal organizations. In 1899 he sold real estate investments in Duluth and moved to Chicago. He founded The United Brotherhood as a life insurance company that would ensure black people, who were often denied coverage at that time. Recessions took a toll on his investments, and he and his family resettled in Seattle, Washington. At one time it was believed he was the wealthiest black person in the Pacific Northwest, but that did not last. In the last decades of his life, he was again working as a barber. He died in 1918 and was inducted into the National Inventors Hall of Fame in 2007.

Information Security Topic Essay Example | Topics and Well Written Essays - 750 words

Information Security Topic - Essay Example s serve to secure different aspects of Information .In the following article one such method to secure network called â€Å"Access Control List† would be studied and an attempt would be made to understand what level of security is achieved through its implementation. INTRODUCTION: Access Control list (ACL) at a very basic level set to define and control the various permissions that can be attached to an object .The object can be a software program like yahoo messenger, a network service like FTP, a file, sound card, other programs, the network, a modem, and so on and so forth. Access means what kind of operations can be done on these objects. Examples include reading a file, writing to a file, creating or deleting objects, communicating with another program, etc. Access Control List defines who is allowed to use that software/service and what operation can he perform on that software/service for example ACL would define who are the users who can use Yahoo messenger and whether they can use it to send files or albums through it or simply chat on it. At a very basic level they mean â€Å"An explicit set of permissions for users (or groups of users) detailing who can access specific items.† [2] CAPABILITY/ kind of security achieved : access control lists limit the access to information to the desired or permitted users . It also sets to establish privileges and permissions that a permitted user would have on the objects. An access control list can be visualized as a list containing permissions attached to an object . The list specifies who or what is allowed to access the object and what operations are allowed to be performed on the object. In a typical ACL, each entry in the list specifies a subject and an operation: for example, the entry (Bob, delete) on the ACL for file ABC gives Bob permission to delete file ABC. How ACL Work when a subject requests for an operation, the system first checks for the entry of the subject in the list in order to determine

Gross Domestic Product Essay Example | Topics and Well Written Essays - 500 words

Gross Domestic Product - Essay Example From this paper it is clear that a comparison of $40,000 earned in 1980 and 2010 can be made by first finding the number of times the consumer price index has decreased or increased from 1980 to 2010. In 1980 and 2010 the consumer price indexes were 82.4 and 236.74 respectively. The percent increase in the inflation rate from 1980 to 2010 was 187%. The average consumer price index went up 1.87 times between 1980 and 2010. The increases in CPIs show that the available products in 2010 were more expensive that they were in 1980. Concerning quality, some of the products have increased quality from 1980 to 2010 because of technological advancement. Good examples are electronics and cars that were more energy efficient in 2010 than they were in 1980.  As the study highlights  a person would be wealthier if he/she earned $ 40,000 in 1980 than making the same amount in 2010. The purchasing power in 1980 was greater than purchasing power in 2010. So, the person would buy more products or assets in 1980 than in 2010. One would choose to live 1980 because prices of products were less expensive than in 2010. If an individual were to determine which year he would have liked to live, the most appropriate and practical answer would be 1980. A person earning $40,000 in 1980 would live more comfortably that another individual who is receiving the same amount in 2010 because products were cheaper in 1980 than in 2010.