Bus duct abnormal temperature indicator
First Claim
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1. A combination comprising a bus duct housing a plurality of bus bars having connected ends forming bus bar joints;
- and a visual indicator mounted on the bus duct to indicate that the bus duct temperature has reached a predetermined level, comprising;
a temperature-sensitive adhesive, and means for mounting the adhesive on the bus duct proximate the location of said joints;
a first indicator element adhesively connected to the adhesive and to said mounting so as to be movable by the force of gravity from a first position when connected by the adhesive, to a second position when released from the adhesive;
wherein the adhesive loses sufficient adhesive properties upon reaching said predetermined temperature so as to release the indicator element; and
said indicator element having indicia on one surface thereof which becomes viewable when the indicator element is in said second position.
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Abstract
An indicator particularly useful for indicating the increase in temperature for a bus bar joint, includes a first sheet-like member hingedly attached to a second sheet-like member. The first member is magnetically or adhesively attached to the bus duct cover. The second member is attached to the first member by a heat-sensitive adhesive. When the adhesive loses its adhesive properties upon reaching a predetermined temperature, the second member pivots down from the first member to provide an indication of an abnormal bus bar joint temperature.
15 Citations
6 Claims
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1. A combination comprising a bus duct housing a plurality of bus bars having connected ends forming bus bar joints;
- and a visual indicator mounted on the bus duct to indicate that the bus duct temperature has reached a predetermined level, comprising;
a temperature-sensitive adhesive, and means for mounting the adhesive on the bus duct proximate the location of said joints; a first indicator element adhesively connected to the adhesive and to said mounting so as to be movable by the force of gravity from a first position when connected by the adhesive, to a second position when released from the adhesive; wherein the adhesive loses sufficient adhesive properties upon reaching said predetermined temperature so as to release the indicator element; and said indicator element having indicia on one surface thereof which becomes viewable when the indicator element is in said second position. - View Dependent Claims (2, 3, 4, 5)
- and a visual indicator mounted on the bus duct to indicate that the bus duct temperature has reached a predetermined level, comprising;
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6. A combination comprising a heat sensitive visual indicator for indicating the increase in temperature of an object to a predetermined level, comprising:
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a heat-sensitive adhesive, and means for mounting the adhesive to the object; an indicator element adhesively connected to the adhesive and to said mounting means so as to be movable by the force of gravity from a first position when connected to the adhesive to a second position when released from the adhesive; wherein the adhesive loses sufficient adhesive properties upon reaching the predetermined level of temperature so as to release the indicator; and said indicator element having indicia on one surface thereof which becomes viewable when the indicator element is in said second position.
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Specification