Over-temperature indicator device for freezers

Patent · Tue Mar 17 00:00:00 EST 1987

OSTI ID:6880319

Janke, D E; Linstromberg, W J

This patent describes an over-temperature indicator device for use in freezers having a control box comprising: a cylindrical housing having a mounting face portion adapted for mounting in an opening in the control box, the mounting face portion defining an opening therethrough, a second end of the cylindrical housing opposite the mounting face portion including an end cap means for closing the second end; a bistable thermostat disk mounted within the cylindrical housing adjacent the second end, the thermostat disk abruptly deforming in response to predetermined temperature changes; an indicator pin slidably mounted within the cylindrical housing and having first and second opposed ends, the first opposed end being coextensive with the opening at the mounting face portion. The second opposed end is adjacent the bistable thermostat disk when the indicator pin is in a non-indicating position. The indicator pin is slidable to an indicating position wherein the first opposed end of the pin extends beyond the cylindrical housing; a permanent magnet mounted at the second opposed end of the indicator pin for magnetic engagement with the bistable thermostat disk; and a cup shaped insulating member mounted over the second end of the cylindrical housing to provide a thermal time delay.

• Assignee: Whirlpool Corp., Benton Harbor, MI
• Patent Number(s): US 4649854
• OSTI ID: 6880319
• Resource Relation: Patent File Date: Filed date 31 Dec 1985
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
FREEZERS
TEMPERATURE CONTROL
THERMOSTATS
PERMANENT MAGNETS
POSITIONING
SUPPORTS
TEMPERATURE MEASUREMENT
THERMAL INSULATION
CONTROL
CONTROL EQUIPMENT
EQUIPMENT
MAGNETS
MECHANICAL STRUCTURES
320106* - Energy Conservation
Consumption
& Utilization- Building Equipment- (1987-)