Category: electrical engineering

1912 Harrisburg Light and Power Company advert…

1912 Harrisburg Light and Power Company advertisement.

1912 Harrisburg Light and Power Company advert…

1912 Harrisburg Light and Power Company advertisement.

U.S. Census Bureau employees, circa 1960s, wit…

U.S. Census Bureau employees, circa 1960s, with the Film Optical Sensing Device for Input to Computers (FOSDIC), a device used to transfer data from paper questionnaires to microfilm.

U.S. Census Bureau employees, circa 1960s, wit…

U.S. Census Bureau employees, circa 1960s, with the Film Optical Sensing Device for Input to Computers (FOSDIC), a device used to transfer data from paper questionnaires to microfilm.

Melba Roy, January 1st, 1964. Roy headed the g…

Melba Roy, January 1st, 1964. Roy headed the group of NASA mathematicians, known as “computers,” who tracked the Echo satellites. Roy’s computations helped produce the orbital element timetables by which millions could view the satellite from Earth as it passes overhead. She went on to become Program Production Section Chief at Goddard Space Flight Center.

Melba Roy, January 1st, 1964. Roy headed the g…

Melba Roy, January 1st, 1964. Roy headed the group of NASA mathematicians, known as “computers,” who tracked the Echo satellites. Roy’s computations helped produce the orbital element timetables by which millions could view the satellite from Earth as it passes overhead. She went on to become Program Production Section Chief at Goddard Space Flight Center.

Dorothy Whitaker at the National Oceanographic…

Dorothy Whitaker at the National Oceanographic Data Center (NODC) magnetic tape library, circa 1960s-70s.

Dorothy Whitaker at the National Oceanographic…

Dorothy Whitaker at the National Oceanographic Data Center (NODC) magnetic tape library, circa 1960s-70s.

Thaddeus Cahill’s 1897 patent for the Te…

Thaddeus Cahill’s 1897 patent for the Telharmonium’s tonewheel mechanism, one of the earliest musical instruments to generate sound by means of electricity.

Thaddeus Cahill’s 1897 patent for the Te…

Thaddeus Cahill’s 1897 patent for the Telharmonium’s tonewheel mechanism, one of the earliest musical instruments to generate sound by means of electricity.