A ladder is a vertical or inclined set of rungs or steps commonly used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top. The vertical members of a rigid ladder are called stringers or rails (US) or stiles (UK). Rigid ladders are usually portable, but some types are permanently fixed to a structure, building, or equipment. They are commonly made of metal, wood, or fiberglass, but they have been known to be made of tough plastic.
Stairs are a structure designed to bridge a large vertical distance between lower and higher levels by dividing it into smaller vertical distances. This is achieved as a diagonal series of horizontal platforms called steps which enable passage to the other level by stepping from one to another step in turn. Steps are very typically rectangular. Stairs may be straight, round, or may consist of two or more straight pieces connected at angles.
The Iroquois Theatre fire was a catastrophic building fire in Chicago, Illinois, that broke out on December 30, 1903 during a performance attended by 1,700 people. The fire caused 602 deaths and 250 non-fatal injuries. It ranks as the worst theater fire in the United States, surpassing the carnage of the Brooklyn Theatre fire of 1876, which claimed at least 278 lives.
An emergency exit in a building or other structure is a special exit used during emergencies such as fires. The combined use of regular and emergency exits allows for faster evacuation, and emergency exits provide alternative means of evacuation if regular exits are inaccessible.
A fire escape is a special kind of emergency exit, usually mounted to the outside of a building – occasionally inside, but separate from the main areas of the building. It provides a method of escape in the event of a fire or other emergency that makes the stairwells inside a building inaccessible. Fire escapes are most often found on multiple-story residential buildings, such as apartment buildings.
The Old Patent Office Building is a historic building in Washington, D.C. that covers an entire city block between F and G Streets and 7th and 9th Streets NW in the Penn Quarter section of Chinatown. Serving as an art gallery for the Smithsonian Institution since the 1960s, it first served as one of the earliest Patent Office buildings.
Anna Wagner Keichline was an American architect, inventor, suffragist, and World War I Special Agent from Pennsylvania. She was the first woman to be registered as an architect in Pennsylvania and she was "one of the first women to actually practice architecture professionally". She was awarded seven patents, including one for a notched brick in 1927.
The Brown Building is a ten-story building that is part of the campus of New York University (NYU), which owns it. It is located at 23–29 Washington Place, between Greene Street and Washington Square East in the Greenwich Village neighborhood of Manhattan, New York City, and is best known as the location of the Triangle Shirtwaist Factory fire of March 25, 1911, which killed 146 people.
The Suntop Homes, also known under the early name of The Ardmore Experiment, were quadruple residences located in Ardmore, Pennsylvania, and based largely upon the 1935 conceptual Broadacre City model of the minimum houses. The design was commissioned by Otto Tod Mallery of the Tod Company in 1938 in an attempt to set a new standard for the entry-level housing market in the United States and to increase single-family dwelling density in the suburbs. In cooperation with Frank Lloyd Wright, the Tod Company secured a patent for the unique design, intending to sell development rights for Suntops across the country.
An escalator is a moving staircase which carries people between floors of a building or structure. It consists of a motor-driven chain of individually linked steps on a track which cycle on a pair of tracks which keep the step tread horizontal.
Harriet Abigail Morrison Irwin was an American architect and the first American woman to patent an architectural design. On August 24, 1869, she submitted a patent, categorized under the Improvement in the Construction of Houses, for a residential design proposal of a hexagonal house. Her husband and brother-in-law would go on to form a company to construct houses based on her design in the Charlotte area.
The Winecoff Hotel fire, of December 7, 1946, was the deadliest hotel fire in American history, killing 119 hotel occupants, including the hotel's original owners. Located at 176 Peachtree Street in Atlanta, Georgia, the Winecoff Hotel was advertised as "absolutely fireproof". While the hotel's steel structure was indeed protected against the effects of fire, its interior finishes were combustible and the building's exit arrangements consisted of a single stairway serving all fifteen floors. All of the hotel's occupants above the fire's origin on the third floor were trapped, and the fire's survivors either were rescued from upper-story windows or jumped into nets held by firemen.
Ellen F. Eglin was an African-American inventor who invented a type of clothes wringer for washing machines.
Lyda D. Newman was a hairdresser and inventor who was also an activist for women's suffrage. She held a patent for a novel durable hairbrush with synthetic bristles.
Harriet Ruth Brisbane Tracy (1834-1918) was born on December 6, 1834, in Charleston, South Carolina. She was a prolific and successful inventor who is credited to have received 27 patents from 1868 to 1915. These patents were in a multitude of fields such as elevators, sewing machines, and crib attachments. Of the 27 patents, six were for elevators and seventeen were for sewing machines. Ten of these patents came during a very productive period from 1890 to 1893. Of her inventions, the most renowned was her Tracy Gravity Safety Elevator. Tracy’s other notable innovations were her Sewing machines and Crib attachments. She died on May 30, 1918, at the age of 83; according to her obituary she was also "gifted as a writer of verse and prose", contributing frequently to "magazines and periodicals."
Maria E. Beasley was an American entrepreneur and inventor. Born in North Carolina, Beasley grew up with a strong interest in mechanical work and learned about the profession of barrel-making from her grandfather. Between 1878 and 1898, she patented fifteen inventions in the United States: these included a footwarmer, an improved life raft, and an anti-derailment device for trains; however, her primary success as an inventor rose from a specialty in barrel-making machines and processes. Beasley licensed a patent to the Standard Oil Company, exhibited her work at the World's Industrial and Cotton Centennial Exposition and the World's Columbian Exposition, and founded two companies for the design and manufacture of barrels.
Patricia Billings is a sculptor, inventor and businesswoman. She invented the building material Geobond. Billings has an entry in the Historical Encyclopedia of American Women Entrepreneurs, 1776 to the Present.
Alice H. Parker was an African-American inventor who was active in the early 1900s. She is most widely recognized for her patent filed for a gas furnace, which served as the basis for the development of modern heating systems in use today.
Catherine Rachel Mott was a housewife and an inventor. She received one patent in 1878, before her death, for an improved fire escape.
Florence Wilhelmina Parpart Layman, most commonly known by her maiden name of Florence Parpart, was an American inventor known primarily for her patents for an industrial sweeping machine and electrical refrigerator.
