[D8959AEW], Letter from Hugh De Coursey Hamilton to Edison Phonograph Works, September 27th, 1889

Item

Abstract

Defective Machines. Untrue Shafts. ### The report I have to make upon the two last motor Phonographs received prior to those shipped for Lisbon, is that in each the main shaft revolved untruly between its centres, one of them in particular was ver y bad; but both unfit to use except upon the original grams of white wax. ### The damage seemed at first to be in the female centre caused by the gate centre having thrown up a burr on the edge of the female centre, but I removed the burr without eradicating the fault. ### Battery. ### My test upon the 4 cell Edison Battery, after setting it up according to instructions, resulted in its driving a Phonograph at the rate of One hundred revolutions per minute for 40 consecutive hours. In endeavouring to recharge the cells I find in each jar at the bottom a precipate crystalized into a dense cale one inch thick which is almost impossible to remove.

Date

1889-09-27

Decade

1880-1889

Type

Identifier

D8959AEW

Folder Set

D8959

Title

[D8959AEW], Letter from Hugh De Coursey Hamilton to Edison Phonograph Works, September 27th, 1889

Microfilm ID

127:927

Publisher

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