Alarm system for space heating appliances

Patent · Tue Jan 13 04:00:00 EST 1987

OSTI ID:7175138

Leaming, R M

An alarm system is described for signaling the presence of excessive surface temperatures in a fuel burning appliance, the system comprising, a sensor assembly including a housing having an annular outer wall, and a bimetallic coil having a radially outwardly turned end segment. A terminal assembly is adjustably mounted on the housing outer wall and includes a set point marker and a contact for location in a path of travel of the end segment of the coil and contactible by the coil end segment and through which an electrical circuit is established upon expansion of the coil during an increase in the surface temperature of the appliance. A pointer is rotatably mounted on the housing and includes a plate defining an opening through which the coil end segment passes in an unrestricted manner for imparting movement to the pointer without obstructing coil expansion, a signal generator unit including a second housing for remote disposition from the sensor assembly, a signal generator, a power source, and conductor means in circuit with the terminal assembly and the signal generator unit to activate the signal generator upon closure of the terminal assembly contact.

• Assignee: NOV; NOV-87-044040; EDB-87-045589
• Patent Number(s): US 4636776
• OSTI ID: 7175138
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
ALARM SYSTEMS
APPLIANCES
BUILDINGS
CONTROL
ELECTRIC COILS
ELECTRIC CONDUCTORS
ELECTRIC CONTACTS
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
EQUIPMENT
EXPANSION
HEATERS
HEATING
MOTION
ROTATION
SIGNALS
SPACE HEATERS
SPACE HEATING
TEMPERATURE CONTROL
TEMPERATURE EFFECTS
TEMPERATURE MEASUREMENT
THERMAL EXPANSION