CHARACTERISTICS OF CRYSTALS
1964 · Department of Defense, Defense Imagery (via FedFlix)
Finding US Government work
The record names a federal body as the creating agency: Department of Defense. A work prepared by an officer or employee of the United States Government as part of that person's official duties has no US copyright (17 U.S.C. 105; before 1978, section 8 of the 1909 Act).
The record names a federal body as the creating agency. A work prepared by an officer or employee of the United States Government as part of that person's official duties has no US copyright (17 U.S.C. 105; before 1978, section 8 of the 1909 Act). This says nothing about copyright outside the United States, or about music, stock footage or other material the film may incorporate.
- Creating body, as recorded
- Department of Defense
- DoD production number
- PIN 39950
- Internet Archive item
- gov.dod.dimoc.39950 (uploader's licence mark: http://creativecommons.org/publicdomain/zero/1.0/)
The record
The Internet Archive item's description, as transcribed by the uploader from the source archive's record. Check it against the National Archives catalog entry linked above.
Department of Defense PIN 39950 CHARACTERISTICS OF CRYSTALS STRESSES THE IMPORTANCE OF FREQUENCY STABILITY AND INTRODUCES THE CRYSTAL CONTROLLED OSCILLATOR AS A POSSIBLE DEVICE USED TO OBTAIN THIS STABILITY. EXPLAINS THE PIEZOELECTRIC EFFECT OF A CRYSTAL, LISTS TYPES OF CRYSTALS HAVING THE PIEZOELECTRIC EFFECT, AND POINTS OUT THE RELATIONSHIP BETWEEN CRYSTAL THICKNESS AND FREQUENCY. VARIOUS CRYSTAL CUTS ARE EXPLAINED AND SHOWN GRAPHICALLY. THE Q OF THE CRYSTAL CIRCUIT IS EXPLAINED, AND BOTH THE PHYSICAL DIMENSIONS AND ELECTRICAL CHARACTERISTICS OF A TYPICAL CRYSTAL ARE DISCUSSED.