Blackout Caps to Be Worn By Transformer Signal
Item
Tiny signal lamps on outdoor transformers atop power-line poles, barely noticeable when street lights are turned on, were found glowing brightly in a blackout and had to be concealed from possible enemy planes. In answer to a rush call from the Pacific coast, engineers of the Westinghouse company designed a helmetlike cap which, when placed over the lamp, permits a narrow beam to shine downward but cannot be seen from above. In normal conditions the lamp is turned off, coming on only as a warning for the service man if the transformer is becoming overheated.
- Title (Dublin Core)
- Blackout Caps to Be Worn By Transformer Signal
- Article Title and/or Image Caption (Dublin Core)
- Blackout Caps to Be Worn By Transformer Signal
- Language (Dublin Core)
- Eng
- Temporal Coverage (Dublin Core)
- World War II
- Date Issued (Dublin Core)
- 1942-07
- Is Part Of (Dublin Core)
-
Popular Mechanics, vol. 78, n. 1, 1942
- pages (Bibliographic Ontology)
- 61
- Rights (Dublin Core)
- Public domain
- Source (Dublin Core)
- Google books
- Archived by (Dublin Core)
- Enrico Saonara
