Accession Number:

AD0626372

Title:

A CONSTANT-FREQUENCY POWER SUPPLY FOR SHIPBOARD ELECTRIC CLOCKS,

Descriptive Note:

Corporate Author:

NAVY MARINE ENGINEERING LAB ANNAPOLIS MD

Personal Author(s):

• Perry,P. B.
• Lebowitz,S. H.

Report Date:

1966-01-01

Pagination or Media Count:

41.0

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

Descriptors:

• *CLOCKS
• *POWER
• POWER SUPPLIES
• FREQUENCY STABILIZERS
• SHIPBOARD
• INVERTERS
• SYNCHRONIZATION(ELECTRONICS)
• FREQUENCY
• TRANSISTORS

Subject Categories:

• Electrical and Electronic Equipment
• Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE