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Summary
Identifier: CollectionUnitev1Edis (find matches)
Title: Collection of United States patents granted to Thomas A. Edison, 1869-1884
Year: 1869 (1860s)
Authors: Edison, Thomas A. (Thomas Alva), 1847-1931 Peters, N. (Norris), lithographer Hammer, William Joseph, 1858-1934, former owner. DSI Edison, Thomas A. (Thomas Alva), 1847-1931, inscriber. DSI United States. Patent Office
Subjects: Catalogs Patents Edison, Thomas A. (Thomas Alva), 1847-1931 Inventions Telegraph Electric machinery Electric apparatus and appliances Phonograph Telephone Motors Catalogs Patents Catalogs Patents Catalogs
Publisher: Washington, D.C. : U.S. Patent Office
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries
Text Appearing Before Image:
her or converse with an-other over the main-line wire without break-ing the circuit. I do not herein claim the combination inone circuit of telephone-instruments and theMorse instruments, as the same is set forth inmy prior application No. 132. I claim as my invention— 1. The method herein specified of produc-ing an electric condition in the closed circuitof a telegraph-line that will give a signal ina telephone by reversing the position in thatline of an electro-magnet, secondary battery,or similar device, substantially as specified. 2. The combination, in a closed circuit, ofa receiving-magnet, a telephone, an electro-magnet, or its equivalent, and an apparatusfor reversing the connections of the same inthe circuit, a rheostat or resistance, a shuntto the same, and a key, substantially as setforth. Signed by me this 11th day of November,A. D. 1878. THOMAS A. EDISON. Witnesses: S. L. Griffin,Martin N. Force. T. A. EDISON.Magneto Electric Machine. No, 218,166. Patented Aug. 5, 1879.
Text Appearing After Image:
N. PETERS. Plioto-Lrttiegiiip^or. Washington. 0. C. United States Patent Office. THOMAS A. EDISON, OF MEKLO PARK, NEW JEESEY.IMPROVEMENT IN MAGNETO-ELECTRIC MACHINES. Specification forming part of Letters Patent No. 218,166, dated Angust 5, 1879; application filed December 9, 1878. To all whom it may concern: Be it known that I, Thomas Alva Edison,of Menlo Park, in the State of New Jersey,have invented an Improvement in the Methodof andMeausforDeveloping Electric Currents,of which the following- is a specification. It has long been known that if two electro-magnets or an electro-magnet and a permanentmagnet be drawn apart or caused to pass byeach other electric currents will be set upin the helix of the electro magnet. It has alsobeen known that vibrating bodies—such as atuning-fork or a reed—can be kept in vibrationby the exercise of but little power. I avail ofthese two known forces and combine them insuch a manner as to obtain a powerful electriccurrent by the expenditure of a
Thomas Edison, 1847-1931, is credited with the development of many important inventions and technologies. Some of his most notable patents and inventions include: - The light bulb: Edison's most famous invention, the light bulb, revolutionized the way we light our homes and businesses. He worked for many years to perfect the design of the light bulb, and his efforts ultimately led to the development of a practical, long-lasting, and commercially viable electric light. - The phonograph: Edison's phonograph was the first device to successfully record and reproduce sound. The phonograph used a cylinder coated with a substance that could be etched by sound waves to record audio, and a needle to play it back. This invention paved the way for the development of the modern record player and other audio recording and playback technologies. - The motion picture camera: Edison's motion picture camera, also known as the kinetograph, was the first device to successfully capture moving images on film. The kinetograph used a series of rapidly rotating lenses to record a series of still images, which could then be played back in rapid succession to create the illusion of motion. This invention laid the foundation for the modern film industry. - The electric pen: Edison's electric pen was an early precursor to the modern-day tattoo machine. The device used a needle that was rapidly vibrated by an electric motor to create a series of punctures in a sheet of paper. This allowed users to easily create multiple copies of a document using a technique known as stenciling. - The electric vote recorder: Edison's electric vote recorder was an early voting machine that was designed to automate the process of tallying and recording votes in elections. The device used a series of levers that could be activated by voters to indicate their choices, and a mechanism to tally the results and display them on a dial. This invention was intended to improve the accuracy and efficiency of the electoral process.