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dc.contributor.authorPetersen, Max S.
dc.date1945-12
dc.date.accessioned2007-01-03T06:01:28Z
dc.date.accessioned2022-02-03T09:28:05Z
dc.date.available2007-01-03T06:01:28Z
dc.date.available2022-02-03T09:28:05Z
dc.identifierlibimagesU711
dc.identifier.urihttp://hdl.handle.net/11124/5988
dc.descriptionDate scanned: 2002-6-12.
dc.descriptionHeld in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.
dc.descriptionDonor: United States Bureau of Mines.
dc.description.abstractC-1; Automatic safety block on drill sharpener. Mechanism locks operating throttle and maintains safety block between jaws by gravity except when foot pedal is depressed. - M. S. Petersen - Dec. 1945.
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.rightsRights management statement available at: http://library.mines.edu/digital/rights.html
dc.subjectMine safety
dc.titleAutomatic safety block on drill sharpener
dc.typeStillImage
dc.contributor.institutionArthur Lakes Library
dc.contributor.institutionRussell L. and Lyn Wood Mining History Archive
dc.contributor.institutionUnited States. Bureau of Mines


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