The United States Occupational Safety and Health Administration (OSHA) was created by Congress under the Occupational Safety and Health Act[?], signed by President Richard M. Nixon on December 29, 1970. Its mission is to prevent work-related injuries, illnesses, and deaths.
... by the slipping friction.
The device is covered by US patents 3,726,146 (1973) and 5,353,655 (1994) by L.A. Mishler and US patent 5,800,311 (1998) by ...