Maximum temperature range indicator

A maximum temperature range indicator comprising:

• a plurality of spaced-apart electrical contacts,
• a plurality of electrical resistor segments connecting said contacts together in electrical series relationship to establish high-resistance conductive paths between successive pairs of said contacts,
• a plurality of temperature-responsive electrical switches each being maintained operatively spaced between a different pair of said contacts, each of said switches coacting with a temperature-sensitive means for closing a low-resistance conductive path between an associated pair of said contacts upon occurrence of a predetermined temperature, the predetermined temperature to which each of said temperature-sensitive means responds being a different predetermined temperature,
• means for supporting said temperature-sensitive means of said plurality of switches in heat-exchanging relationship with an internal fluid of a component of a vehicle and
• means forming a pair of electrically insulated electrodes to which an ohmmeter may be at least temporarily applied, one of said pair of electrodes being connected to the first of said contacts and the other of said electrodes being connected to the final one of said contacts whereby the maximum temperature range experienced by said indicator over a period of time may be determined by measuring the electrical resistance through the electrical circuit formed by said pluralities of contacts and resistor segments and switches.

A maximum temperature range indicator comprising:

• a plurality of spaced-apart electrical contacts,
• a plurality of electrical resistor segments connecting said contacts together in electrical series relationship to establish high-resistance conductive paths between successive pairs of said contacts,
• a plurality of temperature-responsive electrical switches each being maintained operatively spaced between a different pair of said contacts, each of said switches coacting with a temperature-sensitive means for closing a low-resistance conductive path between an associated pair of said contacts upon occurrence of a predetermined temperature to which each of said temperature-sensitive means responds being a different predetermined temperature,
• a tubular housing having a passage therein, said resistor segments being of annular configuration and being disposed in said passage in coaxial, axially spaced-apart relationship with each other, said contacts being annular and being disposed adjacent the ends of said resistor segments to define a series of chambers each of which is within a separate one of said resistor segments, each of said temperature-responsive switches being disposed in a separate one of said chambers,
• whereby the maximum temperature range experienced by said indicator over a period of time may be determined by measuring the electrical resistance through the electrical circuit formed by said pluralities of contacts and resistor segments and switches.