Accession Number : AD0620553

Title :   DEVELOPMENT OF FIRE ALARM THERMOSTAT OTHER THAN MERCURY-IN-GLASS.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Gareau,R.

Report Date : 07 OCT 1948

Pagination or Media Count : 17

Abstract : It was desired to investigate all types of mechanical and electrical fire alarm thermostats, other than mercurial, that would retain advantages of the mercurial and, in addition, be inherently resistant to high-impact shock. Attention was concentrated on a differential control thermostat recently modified for fixed-temperature (fire alarm) applications. Preliminary shock tests disclosed the need for some shock protection. Various methods of shock mounting were considered and a simple shock mount was developed adequately to protect the themostat from high-impact shock. Tests show this shock-mounted thermostat may be used as alternate for the mercury-in-glass type provided the tolerance in operating point is increased to = 5F and the integral low-temperature alarm feature is not required. (Author)

Descriptors :   (*FIRE ALARM SYSTEMS, THERMOSTATS), (*THERMOSTATS, FIRE ALARM SYSTEMS), SHOCK RESISTANCE, VIBRATION ISOLATORS, MARINE SAFETY EQUIPMENT

Distribution Statement : APPROVED FOR PUBLIC RELEASE