The Secretary of Health, Education, & Welfare was the head of the department concerned with the areas named in its title. He was a member of the President'sCabinet. In 1979 there was a division of the Secretary of Health, Education, & Welfare's position into separate secretaries of Health & Human Services and Education.
... to a smaller extent 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 5,800,3 ...