Name/Title
Ludwig Böhm Incandescent LampEntry/Object ID
2024.40.1Description
Ludwig Böhm Stopper Lamp, 1882. Likely the earliest form of a “stopper” lamp, this design secures the stem seal not by glass fusion but by a ground glass stopper and adhesive. It is unlikely this form entered commercial production, as no known examples incorporate a base or provision for a lamp holder. Evacuation was achieved through the bottom tube, which, when rotated toward the valley of the envelope neck, allowed atmospheric exchange. This example descended through relatives of Edison’s patent attorneys, Eaton & Lewis, who retained evidentiary lamps from the Edison lamp patent trials of the early 1890s.Made/Created
Manufacturer
Americal Electric Light Co.Date made
circa 1882Time Period
19th CenturyPlace
* Untyped Place
New York, NY
