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Patent drawing - Collection of United States patents granted to Thomas A. Edison, 1869-1884 (1869) (14756614735) Public domain  image


Patent drawing - Collection of United States patents granted to Thomas A. Edison, 1869-1884 (1869) (14756614735) Public domain image



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:
,charge to the helix o that surrounds the coreof b, and hence when e is closed the secondaryeffect in n neutralizes the static effect as theline is charged, and, as the circuit at the keye is broken, a reverse induction-current is setup in n, neutralizing the discharge of thestatic charge of the line, the helices beingwound so as to produce this reverse and neu-tralizing effect in the core of the electro-mag-net b of the helix n.I claim as my invention— 1. The local equating-battery I, and rheostatr, connected to the line a, and to the receiv-ing-magnet b, in combination with the bat-teries c d, shunt i, and lever h, substantiallyas and for the purposes set forth. 2. The magnets g and/, and induction-coilsn o, in combination with the magnet b, bat-teries c d, and shunt-circuits, substantially asset forth. Signed by me this 19th day of August, A.D. 1874. THOS. A. EDISON. Witnesses: Geo. T. Pinckney,Chas. H. Smith. No. 182,996. T. A. EDISON.ACOUSTIC TELEGRAPH. Patented Oct. 10, 1875.
Text Appearing After Image:
United States Patent Office. THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY, ASSIGNOR TO THEWESTERN UNION TELEGRAPH COMPANY. IMPROVEMENT iN ACOUSTIC TELEGRAPHS. Specification forming part of Letters Patent No. 1§2,996, dated October 10, 1876; application filed May 16, 1876. To all tchom it may concern: Be it known that I, Thomas A. Edison,of Meulo Park, in the county of Middlesex andState of New Jersey, have invented an Im-provement in Acoustic Telegraphs, of whichthe following is a specification: Two batteries are connected to the line andto the earth, and the earth-connection fromone is direct, and in the earth-connection fromthe other are the tremolo circuit-closers ofthe reeds, and also finger-keys. When onetremolo is short-circuited by its key, the othertremolo only is operative in sending pulsationsover the line, and the distant reed responds tothe same. When both are operative in sendingpulsations, both receiving-reeds at the otherend respond. One bat tery is slightly strongertha

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.





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collection of united states patents granted to thomas a edison 1869 1884
collection of united states patents granted to thomas a edison 1869 1884