[D8731AAD], Letter from Charles Lever to Charles Batchelor, April 22nd, 1887


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[D8731AAD], Letter from Charles Lever to Charles Batchelor, April 22nd, 1887

Editor's Notes

"I have sent you free of all cost per Messrs Swan & Leach two arc lamps. The last type has been made by a new firm and are very rough indeed; but I think on trying it you will find it to work allright, as I have had it burning here. The lamp with brass work is the old pattern, but I thought I would send it so that you could see the difference. When you put the glycerine (pure) in the dashpot work the levers up and down a little, until the glycerine gets to the other side of the plunger. Of course the small lamp I sent you sometime ago, being a short arc lamp, does not work so steadily as the open arc type, I think when you see the last type with automatic cut out, you will say that it is a simpler lamp than the Thomson Houston, and it feeds a great deal better also. I have not sent any cases with them buy they are now made of cast brass with the two sides to be taken off when required. The U.S. patent No. 322,115 July 14th 1885. There is also another patent U.S. No. 291,209 Jany 1st 1884 for enabling lamps to be worked from series dynamos. Fig. 1 is the best arrangement shown. I shall be very pleased to hear from you, as I am very anxious to do something in the States if possible. ## P.S. I think it is a great advantage in the new lamp or rather new type of lamp to dispense with the glycerine."





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