#invented

LIFE-SAVING/MEDICAL/GLOBAL IMPACT:

Artificial Heart Valve – Nina Starr Braunwald

Stem Cell Isolation from Bone Marrow – Ann Tsukamoto

Chemotherapy Drug Research – Gertrude Elion

Antifungal Antibiotic (Nystatin) – Rachel Fuller Brown & Elizabeth Lee Hazen

Apgar Score (Newborn Health Assessment) – Virginia Apgar

Vaccination Distribution Logistics – Sara Josephine Baker

Hand-Held Laser Device for Cataracts – Patricia Bath

Portable Life-Saving Heart Monitor – Dr. Helen Brooke Taussig

Medical Mask Design – Ellen Ochoa

Dental Filling Techniques – Lucy Hobbs Taylor

Radiation Treatment Research – Cécile Vogt

Ultrasound Advancements – Denise Grey

Biodegradable Sanitary Pads – Arunachalam Muruganantham (with women-led testing teams)

First Computer Algorithm – Ada Lovelace

COBOL Programming Language – Grace Hopper

Computer Compiler – Grace Hopper

FORTRAN/FORUMAC Language Development – Jean E. Sammet

Caller ID and Call Waiting – Dr. Shirley Ann Jackson

Voice over Internet Protocol (VoIP) – Marian Croak

Wireless Transmission Technology – Hedy Lamarr

Polaroid Camera Chemistry / Digital Projection Optics – Edith Clarke

Jet Propulsion Systems Work – Yvonne Brill

Infrared Astronomy Tech – Nancy Roman

Astronomical Data Archiving – Henrietta Swan Leavitt

Nuclear Physics Research Tools – Chien-Shiung Wu

Protein Folding Software – Eleanor Dodson

Global Network for Earthquake Detection – Inge Lehmann

Earthquake Resistant Structures – Edith Clarke

Water Distillation Device – Maria Telkes

Portable Water Filtration Devices – Theresa Dankovich

Solar Thermal Storage System – Maria Telkes

Solar-Powered House – Mária Telkes

Solar Cooker Advancements – Barbara Kerr

Microbiome Research – Maria Gloria Dominguez-Bello

Marine Navigation System – Ida Hyde

Anti-Malarial Drug Work – Tu Youyou

Digital Payment Security Algorithms – Radia Perlman

Wireless Transmitters for Aviation – Harriet Quimby

Contributions to Touchscreen Tech – Dr. Annette V. Simmonds

Robotic Surgery Systems – Paula Hammond

Battery-Powered Baby Stroller – Ann Moore

Smart Textile Sensor Fabric – Leah Buechley

Voice-Activated Devices – Kimberly Bryant

Artificial Limb Enhancements – Aimee Mullins

Crash Test Dummies for Women – Astrid Linder

Shark Repellent – Julia Child

3D Illusionary Display Tech – Valerie Thomas

Biodegradable Plastics – Julia F. Carney

Ink Chemistry for Inkjet Printers – Margaret Wu

Computerised Telephone Switching – Erna Hoover

Word Processor Innovations – Evelyn Berezin

Braille Printer Software – Carol Shaw

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HOUSEHOLD & SAFETY INNOVATIONS:

Home Security System – Marie Van Brittan Brown

Fire Escape – Anna Connelly

Life Raft – Maria Beasley

Windshield Wiper – Mary Anderson

Car Heater – Margaret Wilcox

Toilet Paper Holder – Mary Beatrice Davidson Kenner

Foot-Pedal Trash Can – Lillian Moller Gilbreth

Retractable Dog Leash – Mary A. Delaney

Disposable Diaper Cover – Marion Donovan

Disposable Glove Design – Kathryn Croft

Ice Cream Maker – Nancy Johnson

Electric Refrigerator Improvements – Florence Parpart

Fold-Out Bed – Sarah E. Goode

Flat-Bottomed Paper Bag Machine – Margaret Knight

Square-Bottomed Paper Bag – Margaret Knight

Street-Cleaning Machine – Florence Parpart

Improved Ironing Board – Sarah Boone

Underwater Telescope – Sarah Mather

Clothes Wringer – Ellene Alice Bailey

Coffee Filter – Melitta Bentz

Scotchgard (Fabric Protector) – Patsy Sherman

Liquid Paper (Correction Fluid) – Bette Nesmith Graham

Leak-Proof Diapers – Valerie Hunter Gordon

FOOD/CONVENIENCE/CULTURAL IMPACT:

Chocolate Chip Cookie – Ruth Graves Wakefield

Monopoly (The Landlord’s Game) – Elizabeth Magie

Snugli Baby Carrier – Ann Moore

Barrel-Style Curling Iron – Theora Stephens

Natural Hair Product Line – Madame C.J. Walker

Virtual Reality Journalism – Nonny de la Peña

Digital Camera Sensor Contributions – Edith Clarke

Textile Color Processing – Beulah Henry

Ice Cream Freezer – Nancy Johnson

Spray-On Skin (ReCell) – Fiona Wood

Langmuir-Blodgett Film – Katharine Burr Blodgett

Fish & Marine Signal Flares – Martha Coston

Windshield Washer System – Charlotte Bridgwood

Smart Clothing / Sensor Integration – Leah Buechley

THE WORLD'S FIRST ELECTRIC ROLLER COASTER

Granville T. Woods (April 23, 1856 – January 30, 1910) introduced the “Figure Eight,” the world's first electric roller coaster, in 1892 at Coney Island Amusement Park in New York. Woods patented the invention in 1893, and in 1901, he sold it to General Electric.

Woods was an American inventor who held more than 50 patents in the United States. He was the first African American mechanical and electrical engineer after the Civil War. Self-taught, he concentrated most of his work on trains and streetcars.

In 1884, Woods received his first patent, for a steam boiler furnace, and in 1885, Woods patented an apparatus that was a combination of a telephone and a telegraph. The device, which he called "telegraphony", would allow a telegraph station to send voice and telegraph messages through Morse code over a single wire. He sold the rights to this device to the American Bell Telephone Company.

In 1887, he patented the Synchronous Multiplex Railway Telegraph, which allowed communications between train stations from moving trains by creating a magnetic field around a coiled wire under the train. Woods caught smallpox prior to patenting the technology, and Lucius Phelps patented it in 1884. In 1887, Woods used notes, sketches, and a working model of the invention to secure the patent. The invention was so successful that Woods began the Woods Electric Company in Cincinnati, Ohio, to market and sell his patents. However, the company quickly became devoted to invention creation until it was dissolved in 1893.

Woods often had difficulties in enjoying his success as other inventors made claims to his devices. Thomas Edison later filed a claim to the ownership of this patent, stating that he had first created a similar telegraph and that he was entitled to the patent for the device. Woods was twice successful in defending himself, proving that there were no other devices upon which he could have depended or relied upon to make his device. After Thomas Edison's second defeat, he decided to offer Granville Woods a position with the Edison Company, but Woods declined.

In 1888, Woods manufactured a system of overhead electric conducting lines for railroads modeled after the system pioneered by Charles van Depoele, a famed inventor who had by then installed his electric railway system in thirteen United States cities.

Following the Great Blizzard of 1888, New York City Mayor Hugh J. Grant declared that all wires, many of which powered the above-ground rail system, had to be removed and buried, emphasizing the need for an underground system. Woods's patent built upon previous third rail systems, which were used for light rails, and increased the power for use on underground trains. His system relied on wire brushes to make connections with metallic terminal heads without exposing wires by installing electrical contactor rails. Once the train car had passed over, the wires were no longer live, reducing the risk of injury. It was successfully tested in February 1892 in Coney Island on the Figure Eight Roller Coaster.

In 1896, Woods created a system for controlling electrical lights in theaters, known as the "safety dimmer", which was economical, safe, and efficient, saving 40% of electricity use.

Woods is also sometimes credited with the invention of the air brake for trains in 1904; however, George Westinghouse patented the air brake almost 40 years prior, making Woods's contribution an improvement to the invention.

Woods died of a cerebral hemorrhage at Harlem Hospital in New York City on January 30, 1910, having sold a number of his devices to such companies as Westinghouse, General Electric, and American Engineering. Until 1975, his resting place was an unmarked grave, but historian M.A. Harris helped raise funds, persuading several of the corporations that used Woods's inventions to donate money to purchase a headstone. It was erected at St. Michael's Cemetery in Elmhurst, Queens.

LEGACY

▪Baltimore City Community College established the Granville T. Woods scholarship in memory of the inventor.

▪In 2004, the New York City Transit Authority organized an exhibition on Woods that utilized bus and train depots and an issue of four million MetroCards commemorating the inventor's achievements in pioneering the third rail.

▪In 2006, Woods was inducted into the National Inventors Hall of Fame.