A 200-SECOND SETTABLE MAGNETIC CORE TIMER,
Abstract
The application of magnetic cores as major components in a settable timer for missile environment was investigated and prototype models developed. The timer consists of a temperature-stabilized 1000-cycle L-C oscillator accurate to 0.1%, a magnetic-core counter in double line shift register mode, and a remote selection unit. Time delays from 1 to 200 seconds can be obtained with a setting resolution to 0.1 second. Maximum error is 0.1% of the time selected over an operating temperature range from -65F to +165F. Size of the timer package is projected to be less than 10 cubic inches while power consumption is less than 40 milliwatts with a power source of 5.6 volts =10%. The count state of the system is defined by the direction of remanent magnetism in the magnetic cores and, therefore, is not altered by the loss or absence of powersupply voltage. Sufficient energy will remain in the capacitors to complete any data transfer already under way at the time of failure. The remote selection system eliminates the need for circuit power while the time delay is being selected. The time delay selected can be stored without standby power for an indefinite length of time because of magnetic storage. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1965
- Accession Number
- AD0614564
Entities
People
- Douglas L. Dickerson
Organizations
- Picatinny Arsenal