[LB005354], Letter from Thomas Alva Edison to Brehmer Bros, November 17th, 1879


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[LB005354], Letter from Thomas Alva Edison to Brehmer Bros, November 17th, 1879

Editor's Notes

We send you [Brehmer Bros.] the two small phonographs (left here by Mr Painter), tonight by express. We have faced off the parts of lever which clamp the diaphragm, this is absolutely necessary. The German silver springs must be [narrower? ?] as those now on instruments and a No. 6 Sharp's needle used. The point of this needle must be left sharp but smoothed sufficiently so as not to scratch. Your needle is too thick and has too blunt a point. The felt pads at back of spring are saturated with shellac and consequently are hard and sold and have not `give'-- A good past for fastening them to spring and diaphragm is made of Beeswax and Resin half and half, it melts easy and sticks well-- Use as small an amount as possible-- The Japan must be taken off the base underneath at the point where it [?] the adjusting screw and also int eh recess of the lever where it strikes the adjusting [screw?] The casting at this point should also be free from Japan. I sne ond of [illegible words] pats so that [can see the] difference between yours and what they ought to be. I would usggest that where the spring is filed so as to weaken it, it should be done with a smooth file and aftewards draw filed a little. Apart from these points I find your instruments well made and of good material.





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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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