Arrangement for periodically changing the intensity of an electric current
United States Patent 3226600

Inventors:
Gotthold, Zielasek
Publication Date:
12/28/1965
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Assignee:
BOSCH GMBH ROBERT
Primary Class:
315/209R
Other Classes:
340/475, 338/23, 338/22R
International Classes:
B60Q1/38; H05B39/09; B60Q1/34; H05B39/00
US Patent References:
2797342Electrical beacon equipment
2843802Tell-tale circuit
2967976Blinking light arrangement
2987702Emergency signal lamp
3044968Positive temperature coefficient thermistor materials
3064222Electrical resistor