[MBN003165B], Technical Note, Charles Batchelor, July 29th, 1879
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Title
[MBN003165B], Technical Note, Charles Batchelor, July 29th, 1879
Editor's Notes
No. 214 Telephone Order. Mr Kruesi-- The four inertia telephones with small Jablochkoff candle carbons on your desk are all right and may be packed immediately-- The four Bergmann transmitter telephones on Flammer's bench must have new boxes on with inertia telephones of thick mica and connection strips pasted to dipahragms they must have a rubber mouthpiece from the Bergmann telephones screwed into the wood so [drawing]: instead of turning the wood into the shape of a mouthpiece. In all the instruments you pack, put a little watch oil in all working parts. Do not address to Puskas. Make a small clamp in corner for clamping the connecitons strips so [drawing]: so as not to put both the wire from the hinge and srip from diaphragm in on one screw but make plate x & screw to box solder hinge wire to it & have clamp washer at end to fasten strip. I think it would be best to platinise the hinges just where the springs touch in order to insure good connection. Put a spring on one chalk wiht Palladium .20 twenty hundredths wide and flat so that it makes a track on the chalk that wide and see that all the springs on the other three make tracks as wide as themselves. In the inertia telephones make Jablochkoff candel buttons and make them thus [drawing]: rounded at both ends
Author
Date
1879-07-29
Type
Folder/Volume ID
MBN003-F
Microfilm ID
90:749
Document ID
MBN003165B
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University