Woman worker measuring spring pressure for gyro instrument rotor, Ternstedt Manufacturing Division plant

View of a woman testing the spring pressure for a rotor of an aircraft gyro instrument at the Ternstedt Manufacturing Division factory. Label on back: "Nothing is more important in the function of a gyro aircraft instrument than the spinning rotor and the bearings upon which it turns. One of the most exacting operations in assembly of the bearing is adjustment of tiny springs each of which must exert identical pressure. This picture, taken in a Fisher Body Ternstedt plant where gyro horizon and directional indicators are being built for the Army, shows how the pressure of each of four minute springs is measured by one thousandths of an inch, and if one spring exerts the slightest degree of pressure more than one of the others, function of the instrument is affected. Pressure of 105 ounces. From W.S. McLean, Fisher Body Division, General Motors Corporation, Detroit, Michigan. Note editor: This photo and caption have been reviewed by the War Department." Stamped on back: "Fisher Body Photographic, 3-258 General Motors Bldg., Detroit, Mich." Handwritten on back: "Women workers."