Electric discharges; X-ray tubes; Scientific apparatus and instruments
This instrument appears to be an early type of vacuum discharge tube or x-ray tube. The glass tube contains metal electrodes that have been sealed and from which the air has been removed by a vacuum system. Physical Description: Glass bulb with...
Electronic industries; People; Photographs; San Carlos (Calif.)--History; Technology;
At bottom of black-and-white photographic print: "Eimac employees Naomi Prindle of San Carlos, left, and Bernice Buttacavole, San Mateo, are shown with two Eimac electron-power tubes widely used in military and commercial applications. Eimac...
Electronic industries; People; Photographs; San Bruno (Calif.)--History; Technology;
At bottom of black-and-white photographic print: "Eimac super power klystrons are tested in San Bruno, California plant. An Eimac super power klystron was used in the recent Venus radar contact supplying the high radio frequency power. Eimac...
Klystron development took place in this laboratory. The tubes are the highest objects on the table, vacuum pumps are below. After 17 months work the invention was announced to the public, 1939.
New Almaden Mines; Hardware;Mining equipment; Receipts
Duplicate receipt for purchase of 6 glass tubes by Quicksilver Mining Co. from Conroy & O'Connor, Importers of Hardware, Iron, Steel, and Other Metals, San Francisco, Nov. 30, 1864, (No.13 on verso)
Scientific apparatus and instruments; Induction coils
The Ruhmkorff induction coil consists of two separate coils of wire one inside the other wound around a cylinder with a central core of soft iron rods. When a current is passed through the first primary coil, current is induced in the secondary...
Scientific apparatus and instruments; Santa Clara University (Calif.); Induction coil
The Ruhmkorff induction coil consists of two separate coils of wire one inside the other wound around a cylinder with a central core of soft iron rods. When a current is passed through the first primary coil, current is induced in the secondary...
Scientific apparatus and instruments; Santa Clara University (Calif.); Electric discharges; X-ray tubes;
This instrument appears to be an early type of vacuum discharge tube or x-ray tube. The glass tube contains metal electrodes that have been sealed and from which the air has been removed by a vacuum system.
