[NS85ADB01], Technical Note, Thomas Alva Edison, John F Ott, March 10th, 1885
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Title
[NS85ADB01], Technical Note, Thomas Alva Edison, John F Ott, March 10th, 1885
Editor's Notes
John Ott= I suppose you have the auto regulator for Duplex ready I now want you to set up a Quadruplex this and see if an automatic will work on that-- all the extra apparatus necessary is a polarized relay with centered tongue so when no current passes the tongue will be between the 2 points and touch neither use differential relays The polarized relay that works the ratchet motor resistance is in the birdge, when the distant man sends on the common relay the armature opens the circuit of the polarized relay in the bridge wire, as it is not in a bridge in relation to the incoming current but only to the outgoing-- thus every time there is no dot or dash on the common relay from the distant station the relay is connected & in the bridge, hence everytime the home station closes & the line is out of balance the polarized relay will work until the resistance is adjusted so practically not enough current passed through the bridge wire to work the polarized relay Have both the Duplex & Quad set up so I can see them working when I return-- there is no need to put relays at the other end-- Get out that old type writer and fix it up so all the keys and mechanism will work then have 6 or 7 letters cut by Bergmanns type wheel man formed of shallow points just sufficient to strike through 3/1000 French Electric pen stencil paper= put a stripper on paper just around when type strikes cover the cylinder with Lead-- Rubber, Raw Hide or other material that will work well. Then see if you can pound out a stencil & print it on a regular pen press, if you get it to work perfectly satisfactory get a good type writer from Insull & change all of the letters to perforating ones & make a good type writer-- you better take the letter N say also n and cut them in various ways to see which is the best, as the perforation need be only 3/1000 thick you will see that the points can be very shallow. Have some resonators of thick 1/16 brass tubing [drawing] also one each kind 1/2 inch dia inch 1/2 inch 1/4 inch long-- hole in Sliding tube 1/4 inch
Author
Recipient
Mentioned
Date
1885-03-10
Type
Folder/Volume ID
NS85-F
Microfilm ID
162:792
Document ID
NS85ADB01
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University