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US Patent: 919,066
Relay device for electric circuits
Patentee: Carl A. Palmgren (exact or similar names) - Chicago, IL USPTO Classifications: 335/274 Tool Categories: electrical devices Assignees: None Manufacturer: Not known to have been produced Witnesses: H. E. Cullen W. E. Boger	Patent Dates: Applied: Apr. 18, 1907 Granted: Apr. 20, 1909 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Palmgren Steel Products, Inc.
Description: The inventor was manager of the Experimental Department at Illinois Steel Co.

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