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High temperature thermal cutoff device

A warm, fusing technology, used in circuit devices, automatic disconnection emergency protection devices, emergency protection devices, etc.

Inactive Publication Date: 2010-03-31
THERM O DISC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TCOs are usually designed to cut off current to the device in an irreversible manner

Method used

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Examples

Experimental program
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Embodiment 1

[0076] According to various aspects of the invention, a high temperature TCO device is formed as follows. Thermal pellets are formed by combining 980 g to 1000 g of triptycene (commercially available from Sigma-Aldrich manufacturer, 95-99% pure) with 20 g to 0.5 g of colorant, binder and / or mold release agent mix. The homogenized mixture was processed on a standard powder compaction press (commonly available from pharmaceutical equipment suppliers). Powder is fed through a gated powder flow control system and evenly distributed over the rotating die table. The mold is filled with the powder and the powder in the mold is punched under a pressure of about 1 to 4 tons to form compacted powder pellets having a density of 29 to 50 pellets / gram. The thermal pellets were placed into a highly conductive metal closed-end cylinder with an inner diameter close to the outer diameter of the TCO thermal pellets. The closed end of the barrel is staked shut with axial conductive metal lead...

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Abstract

The present disclosure provides high temperature thermal cutoff devices having a high-temperature thermal pellet with a transition temperature of greater than or equal to about 240 DEG C and comprising at least one organic compound. The pellet is disposed in a housing, which is sealed with a high-temperature seal that provides substantial sealing up to at least the transition temperature. The high-temperature TCO also has a current interruption assembly, which establishes electrical continuity in a first operating condition corresponding to an operating temperature of less than said transitiontemperature and discontinues electrical continuity when the operating temperature exceeds the transition temperature. Methods of making such high-temperature thermal cut off devices are also provided.

Description

[0001] Cross References to Related Applications [0001] This application claims the benefit of priority to US Provisional Application No. 61 / 086,330, filed August 5, 2008. The entire disclosure of the above application is incorporated herein by reference. technical field [0002] The present invention relates to electrical current interruption devices and, more particularly, to high temperature current interruption safety devices or thermal cut-offs that provide protection against overheating conditions. Background technique [0003] The statements in this section merely provide background information related to the present invention and may not constitute prior art. [0004] Appliances, electronics, motors, and other electrical devices generally have optimum ranges for operating temperatures. The temperature range over which damage to system components may occur or where the device may become a potential safety hazard in the appliance or to the end user plays an importan...

Claims

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Application Information

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IPC IPC(8): H01H85/04H01H85/06H01H69/02
CPCH01H2037/762H01H85/055H01H37/765H01H69/02H01H85/04H01H85/06H01B1/12Y10T29/49105Y10T29/49107H01H2037/768H01H2223/008H01H2235/004H01H2235/01H02H5/047
Inventor 佩里·肯特特鲁翁格·古延
Owner THERM O DISC
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