
Granville T. Woods, also known as Black Edison, was an African American inventor who contributed significantly to the development of the telephone, streetcar, and more. He established the Woods Electric Company in Cincinnati, Ohio, in 1887 to market and sell his patents, including the Synchronous Multiplex Railway Telegraph, which allowed communication between train stations and moving trains. Woods reorganised his Cincinnati company as the Woods Electric Company after receiving a patent for the multiplex telegraph. The company was devoted to invention creation until its dissolution in 1893.
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What You'll Learn
- Granville T. Woods founded the company in Cincinnati, Ohio, in 1887
- Woods was an African American inventor who made key contributions to the development of the telephone
- He reorganised his Cincinnati company as the Woods Electric Co. after receiving a patent for the multiplex telegraph
- The company was dissolved in 1893
- Woods sold a number of his devices to companies like Westinghouse and General Electric

Granville T. Woods founded the company in Cincinnati, Ohio, in 1887
Granville T. Woods founded the Woods Electric Company in Cincinnati, Ohio, in 1887. Woods was born in Columbus, Ohio, in 1856, and received little schooling as a child. In his early teens, he took up various jobs, including working as a railroad engineer in a railroad machine shop, and on a British ship. He then moved to New York City, where he took courses in engineering and electricity.
In 1872, Woods obtained a job as a fireman on the Danville and Southern Railroad in Missouri. He quickly rose through the ranks and became an engineer. He moved to Cincinnati, Ohio, in 1880, and established himself as an electrical engineer and inventor. During this time, he began devising and patenting inventions, mostly at the intersection of electricity and railroads.
One of Woods' most notable inventions was the "inductor telegraph", which allowed communication between moving trains and stations. He also invented the "troller", a grooved metal wheel that allowed streetcars to collect electric power from overhead wires. Woods' inventions were so successful that he founded the Woods Electric Company to market and sell his patents. The company was also devoted to creating new inventions, and Woods is known as the "Black Edison", registering nearly 60 patents in his lifetime.
Despite his success as an inventor, Woods faced challenges due to racial discrimination. His white partners in Cincinnati rarely paid him a salary and refused to manufacture his devices. In 1890, he moved his research operations to New York City, where he continued to invent and improve various electrical devices until his death in 1910.
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Woods was an African American inventor who made key contributions to the development of the telephone
Granville T. Woods, born on April 23, 1856, in Columbus, Ohio, was an African American inventor who made significant contributions to the development of the telephone. Woods, who faced racial prejudices and discrimination, defied the odds to become one of the most prolific Black inventors of his time. He is often referred to as the "'Black Edison."
Woods had little formal education in his early years, but he was determined to learn and educate himself. He took on various jobs, including working in railroad machine shops, steel mills, and as a railroad worker. This hands-on experience, along with his self-studies, laid the foundation for his future inventions.
Woods began his career in invention and engineering by working for various companies, including the Cincinnati company and Alexander Graham Bell's company. He eventually established his own company, Woods Electric Co., in Cincinnati, Ohio, in 1887. Through this company, Woods introduced the world to several groundbreaking inventions, including the synchronous multiplex railway telegraph.
One of Woods' most notable contributions to the development of the telephone was his invention of the "telephone transmitter" or "telegraphony." This device combined the features of both the telephone and the telegraph, allowing operators to send and receive messages more quickly and efficiently. The patent for this invention was purchased by Alexander Graham Bell, providing Woods with the financial freedom to pursue his own research.
In addition to his work on the telephone, Woods also made significant contributions to other technologies, including the streetcar and electric railways. His inventions and innovations continue to inspire and pave the way for future generations of inventors and engineers, leaving a lasting legacy that celebrates his genius and contributions to racial equality in the United States.
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He reorganised his Cincinnati company as the Woods Electric Co. after receiving a patent for the multiplex telegraph
In 1884, John Henry Woods, an inventor and entrepreneur, received a patent for the multiplex telegraph, a groundbreaking invention that revolutionized communication. This achievement marked a significant turning point in Woods' career and prompted him to restructure his existing business endeavors. At that time, Woods already owned a successful company in Cincinnati, Ohio, which served as a testament to his entrepreneurial spirit and innovative mindset. Recognizing the potential of his new patent, he made the strategic decision to reorganize his Cincinnati company, focusing specifically on his electrical inventions and aspirations. Thus, the Woods Electric Co. was born, reflecting Woods' forward-thinking approach and marking a pivotal moment in the history of electricity and telecommunications.
The formation of the Woods Electric Co. signified Woods' commitment to innovation and his belief in the potential of electricity. With this new company, he aimed to explore and capitalize on the emerging opportunities presented by the electrical revolution. The multiplex telegraph, the invention that precipitated the company's formation, was a remarkable achievement. It allowed for the simultaneous transmission of multiple messages over a single wire, significantly increasing the efficiency and capacity of long-distance communication. This invention not only showcased Woods' ingenuity but also addressed a pressing need in the rapidly evolving field of telecommunications.
The reorganization of his Cincinnati company as the Woods Electric Co. reflected Woods' strategic vision. By focusing on his electrical inventions, he positioned himself at the forefront of the rapidly advancing electrical industry. This move allowed him to concentrate his resources and efforts on developing and commercializing innovative electrical products, solidifying his place in the burgeoning electrical market. The company's establishment in Cincinnati also held significance, as the city was a burgeoning industrial center at the time, providing access to a skilled workforce, raw materials, and a thriving business environment.
The formation of the Woods Electric Co. not only showcased Woods' business acumen but also underscored his contribution to the advancement of technology. The multiplex telegraph, the catalyst for the company's creation, found wide application in the telecommunications industry. It improved the speed and efficiency of communication, particularly over long distances, and played a pivotal role in the evolution of telegraphic communication. Beyond this invention, Woods continued to innovate, developing a diverse range of electrical products that found utility in various industries and contributed to the progress of modern technology.
Under Woods' leadership, the Woods Electric Co. went on to become a prominent player in the electrical industry, building a strong reputation for innovation and quality. The company's early focus on the multiplex telegraph laid the foundation for future successes, and Woods' decision to reorganize his business around this invention proved to be a pivotal turning point. This event not only shaped the trajectory of the company but also influenced the course of electrical and telecommunications advancements, leaving a lasting impact on the world. The Woods Electric Co. stands as a testament to the power of innovation and the visionary thinking of its founder, John Henry Woods.
The reorganization of his Cincinnati company as the Woods Electric Co. was a defining moment, not just for John Henry Woods but also for the advancement of electrical technology and telecommunications. This transformation, spurred by the patenting of the multiplex telegraph, exemplifies the intersection of ingenuity, entrepreneurship, and technological progress. The Woods Electric Co. would go on to make significant contributions to the electrical industry, building upon the foundation laid by its founder's pioneering spirit and groundbreaking inventions. This narrative serves as a reminder of the transformative power of innovation and its capacity to shape industries, societies, and our understanding of the world.
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The company was dissolved in 1893
Granville T. Woods, born to free African Americans in Columbus, Ohio, on April 23, 1856, received little schooling as a young man. He took up a variety of jobs, including working as a railroad engineer in a railroad machine shop, and later as an engineer on a British ship. From 1876 to 1878, Woods studied engineering and electricity in New York City, a subject that he realized held the key to the future.
In 1880, Woods moved to Cincinnati, Ohio, and established his business as an electrical engineer and inventor. In 1887, he patented the Synchronous Multiplex Railway Telegraph, which allowed communication between train stations from moving trains by creating a magnetic field around a coiled wire under the train. This invention was so successful that Woods founded the Woods Electric Company in Cincinnati, Ohio, to market and sell his patents.
However, the company quickly shifted its focus to invention creation, and it was eventually dissolved in 1893. This dissolution may have been due to the racial dynamics of the time, with wealthy white partners refusing to pay salaries or manufacture devices invented by Woods. Additionally, Woods faced difficulties in enjoying his success as other inventors, including Thomas Edison, often claimed ownership of his patents.
Despite these challenges, Woods went on to invent the power pick-up device in 1901, which forms the basis of the \"third rail\" used by electric-powered transit systems today. He also created a system for controlling electrical lights in theatres, known as the "safety dimmer", which was economical, safe, and efficient, saving 40% of electricity use. By the time of his death in 1910, Woods had invented 15 appliances for electric railways and received nearly 60 patents, many of which were assigned to major manufacturers of electrical equipment.
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Woods sold a number of his devices to companies like Westinghouse and General Electric
Granville T. Woods, also known as "Black Edison", was an African American inventor who contributed significantly to the development of the telephone, streetcar, and more. He received little formal education as a young man but took up various engineering and industrial jobs before establishing a company focused on electrical apparatus.
Woods' journey as an inventor began in Cincinnati, Ohio, in the early 1880s, where he devised and patented inventions, particularly those that intersected electricity and railroads. He established the Woods Electric Company in 1887 or 1889 in Cincinnati to market and sell his patents. However, the company soon shifted its focus to invention creation.
Woods' most notable inventions include the Synchronous Multiplex Railway Telegraph, which allowed communication between train stations and moving trains, and the power pick-up device, which forms the basis of the "third rail" used by electric-powered transit systems. He also improved upon existing inventions, such as creating a safer underground third rail system and developing an improved air-brake system for trains.
Woods' inventions and patents attracted the attention of larger companies, and he sold a number of his devices to companies like Westinghouse and General Electric. Westinghouse, a rival to Thomas Edison's electric company, was a major player in the electrical industry, heavy industry, and consumer electronics. General Electric, formed in 1892 through a merger between Edison's company and Thomson-Houston Electric Company, was a strong competitor to Westinghouse. By selling his inventions to these companies, Woods ensured that his innovations became part of the electrical equipment and appliances that are commonly used today.
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Frequently asked questions
The Woods Electric Company was founded by Granville T. Woods, an African American inventor who made significant contributions to the development of the telephone, streetcar, and more.
The Woods Electric Company was founded in 1887, after Woods received a patent for the Synchronous Multiplex Railway Telegraph.
The Woods Electric Company was located in Cincinnati, Ohio.
The Woods Electric Company was dissolved in 1893. Woods died in 1910, and by that time, he had invented 15 appliances for electric railways.




















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