TY - MANSCPT DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: In Copyright - Rights-holder(s) Unlocatable or Unidentifiable TI - Helipot Models 871 and 847 Analog to Digital Converters ID - hx11xf65s AU - Armstrong & Hess DA - 1950/// YR - 1950 AV - Beckman Historical Collection, Box 85 VL - Beckman Historical Collection, Box 85 AN - Beckman Historical Collection, Box 85 UR - https://digital.sciencehistory.org/works/hx11xf65s KW - Microelectronics KW - Analog-to-digital converters KW - Beckman Instruments, Inc. LA - ER -