Scribner telegraph repeater
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"NMAH", "title_sort": "SCRIBNER TELEGRAPH REPEATER", "guid": "http://n2t.net/ark:/65665/ng49ca746a5-3c12-704b-e053-15f76fa0b4fa", "title": {"label": "Title", "content": "Scribner telegraph repeater"}, "metadata_usage": {"access": "CC0"}, "data_source": "National Museum of American History"}, "indexedStructured": {"date": ["1870s"], "object_type": ["Patents", "telegraph repeater", "telegraph relay", "Models"], "name": ["Scribner, Charles E."], "topic": ["Telegraph Relays & Repeaters", "Communications"], "online_media_type": ["Images"]}, "freetext": {"setName": [{"label": "See more items in", "content": "Work and Industry: Electricity"}, {"label": "See more items in", "content": "Communications"}, {"label": "See more items in", "content": "Telegraph Relays & Repeaters"}], "date": [{"label": "date made", "content": "1876"}], "identifier": [{"label": "ID Number", "content": "EM.251257"}, {"label": "catalog number", "content": "251257"}, {"label": "accession number", "content": "48865"}, {"label": "patent number", "content": "181600"}], "notes": [{"label": "Description", "content": "Telegraph repeaters amplified electrical signals in a telegraph line. Telegraph messages traveled as a series of electrical pulses through a wire from a transmitter to a receiver. Short pulses made a dot, slightly longer pulses a dash. The pulses faded in strength as they traveled through the wire, limiting the distance a message could travel. Repeaters remedied that problem by detecting a weak signal and using a local power source to re-energize and re-transmit the signal down the line."}, {"label": "Description", "content": "This model was submitted to the U.S. Patent Office by inventor Charles Scribner of Toledo, Ohio, on 9 August 1876 along with his patent application. Only 20 days later, he received patent #181600 for his \"Improvement in Telegraphic Repeaters;\" perhaps one of the shortest review periods ever for a patent. The rods seen along the top of the repeater connect the armatures of two relays to a centrally-mounted switch so that each relay can control the other. The armature of one relay is Stamped \"Western Union Telegraph Co. Cleveland, O.\""}, {"label": "Location", "content": "Currently not on view"}], "name": [{"label": "maker", "content": "Scribner, Charles E."}], "physicalDescription": [{"label": "Physical Description", "content": "brass (overall material)"}, {"label": "Physical Description", "content": "wood (overall material)"}, {"label": "Physical Description", "content": "cloth (overall material)"}, {"label": "Physical Description", "content": "rubber (overall material)"}, {"label": "Measurements", "content": "overall: 5 in x 12 in x 6 in; 12.7 cm x 30.48 cm x 15.24 cm"}], "dataSource": [{"label": "Data Source", "content": "National Museum of American History"}], "objectType": [{"label": "Object Name", "content": "telegraph repeater"}, {"label": "Object Name", "content": "telegraph relay"}, {"label": "Object Type", "content": "Patent Model"}]}}, "url": "edanmdm:nmah_706363", "hash": "9aec02facca2254890993294e5db4a27ca758b65", "docSignature": "24f2f73e5cd0f75fbcbc6888c77657d9", "timestamp": 1663782597, "lastTimeUpdated": 1653680847, "title": "Scribner telegraph repeater"}