Physical Format: Drawings (visual works) / Contributor: Iron Range Research Center / Keywords: Oliver Iron Mining Company - Minnesota Digital Library Search Results

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1. Automatic warning bell for cage hoists, Leonidas, Minnesota

Date Created:: 1923-03-24
Description:: Drawing of automatic warning bell for cage hoists in Leonidas engine room.
Contributing Institution:: Iron Range Research Center
Type:: Still Image
Format:: Drawings (visual works)

2. Drawing of safety doors, Eveleth, Minnesota

Date Created:: 1922-09-18
Description:: Drawing of safety doors as protection against falling objects.
Contributing Institution:: Iron Range Research Center
Type:: Still Image
Format:: Drawings (visual works)

3. Locomotive watering device, Spruce Mine, Eveleth, Minnesota

Date Created:: 1923-11-01
Description:: Drawing of locomotive watering device.
Contributing Institution:: Iron Range Research Center
Type:: Still Image
Format:: Drawings (visual works)

4. Safety chains on a skip, Eveleth, Minnesota

Date Created:: 1922-09-19
Description:: Drawing of safety chains to prevent skip being lowered on underground miners.
Contributing Institution:: Iron Range Research Center
Type:: Still Image
Format:: Drawings (visual works)

5. Underground safety stations, Eveleth, Minnesota

Date Created:: 1920-07-20
Description:: Underground safety stations located at definite intervals.
Contributing Institution:: Iron Range Research Center
Type:: Still Image
Format:: Drawings (visual works)

6. Warning bell used on motor tram cars, Eveleth, Minnesota

Date Created:: 1923-02-26
Description:: Drawing of underground motor tram car bell.
Contributing Institution:: Iron Range Research Center
Type:: Still Image
Format:: Drawings (visual works)