A CONSTANT-FREQUENCY POWER SUPPLY FOR SHIPBOARD ELECTRIC CLOCKS,
Abstract
The replacement of spring-powered clocks with synchronous motor-driven electric clocks in shipboard control spaces produced a problem of inaccurate timekeeping due to the poor frequency stability of shipboard power systems. To alleviate this problem, a low-cost solid-state, tuning-fork controlled static inverter-type power supply, capable of powering up to six internally illuminated clocks per MIL-C-23339, with timekeeping accuracy better than =15 seconds per day (and suitable for shipboard use) was developed. The development, design, construction, and testing to requirements of MIL-I-983C of a development model of this power supply are described. It is recommended that units of this type be procured for installation in control spaces of ships equipped with electric clocks. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1966
- Accession Number
- AD0626372
Entities
People
- P. B. Perry
- S. H. Lebowitz