Abstract A disposable fever indicator is provided to determine whether or not a predetermined body temperature has been reached. The indicator comprises a vessel containing therein a movable member and means for exerting a force to move the member from a first position to a second position. The indicator further includes meltable bonding means disposed within the vessel and adapted to overcome the force exerted by the aforementioned means and keep the member in the first position until the predetermined temperature is reached at which time the bonding means melts and allows the member to move to the second position under the action of the force exerting means. The indicator is armed only prior to usage. Prior to arming the device, even if the predetermined temperature is reached or exceeded, the movable member will remain in the first position.
A fever indicator for determining temperatures above a predetermined value comprising: a vessel having walls, a closed end, and an open end; a plug member disposed for movement within said vessel; means bonding said plug within said vessel at a first position spaced apart from said vessel closed end in airtight relationship with said vessel walls, said bonding means comprising a material meltable at or above said predetermined temperature; a portion of said vessel between said closed end and plug, said portion being evacuated of air; a removable closure over said vessel sealing said open end; and, a second portion of said vessel extending between said plug and said open end, said vessel second portion being evacuated of air.
Claim 2
Dependent Claim
119 words
A fever indicator for determining temperatures above a predetermined value comprising: a vessel having walls, a closed end, and an open end; a plug member disposed for movement within said vessel; means bonding said plug within said vessel at a first position spaced apart from said vessel closed end in airtight relationship with said vessel walls, said bonding means comprising a material meltable at or above said predetermined temperature; a portion of said vessel between said closed end and plug, said portion being evacuated of air; a removable closure over said vessel sealing said open end; and, a second portion of said vessel extending between said plug and said open end, said vessel second portion being evacuated of air.
Claim 3
Dependent Claim
14 words
The indicator in accordance with claim 1 wherein said vessel comprises a capillary tube.