The present invention relates to a time-temperature indicating module that causes a spread material whose degree of diffusion changes with temperature change to be absorbed and diffused into a diffusion material through induction of a crack, guides a diffusion direction of the spread material through a guide line printed in a longitudinal direction of the diffusion material and also enables a clear start time point of diffusion to be displayed.

An apparatus includes a first glass plate, and an outer layer disposed over the first glass plate. The first glass plate and the outer layer are configured to hold a semiconductor die disposed on the first glass plate, and a solder preform interposed between the semiconductor die and the outer layer. The solder preform is viewable through the first glass plate.

An apparatus includes a first glass plate, and an outer layer disposed over the first glass plate. The first glass plate and the outer layer are configured to hold a semiconductor die disposed on the first glass plate, and a solder preform interposed between the semiconductor die and the outer layer. The solder preform is viewable through the first glass plate.

Disclosed herein are delayed reaction threshold temperature indicators and methods of making and activating the same, the delayed reaction threshold temperature indicators including a first substrate, first and second layers, and a housing secured to the substrate. The first layer includes a first reactant and an optional meltable polymer, and the second layer includes a meltable polymer and a second reactant. The meltable polymer is configured to keep the first and second reactants from interacting with each other. When exposed to temperatures at and/or above a desired threshold for a period of time, the meltable polymer melts and allows the first and second reactants to come into contact with each other, thereby producing a visual change in appearance.

Systems and methods are disclosed of a service cart for an aircraft or other vehicle, which includes a thermoelectric device capable of generating a current as a result of a temperature differential between a cold compartment of the cart and an ambient environment. The current can be either stored in a battery or other storage device, and used to power one or more electronic components associated with the cart.

Systems and methods are disclosed of a service cart for an aircraft or other vehicle, which includes a thermoelectric device capable of generating a current as a result of a temperature differential between a cold compartment of the cart and an ambient environment. The current can be either stored in a battery or other storage device, and used to power one or more electronic components associated with the cart.

An ascending/descending indicator can include a sealed housing that contains a deep eutectic solvent (DES) within the housing. The DES can include two or more components and is configured to exhibit a first characteristic when at a first temperature and to assume a second characteristic when exposed to a second temperature and to substantially maintain the second characteristic even when again exposed to the first temperature.

An ascending/descending indicator can include a sealed housing that contains a deep eutectic solvent (DES) within the housing. The DES can include two or more components and is configured to exhibit a first characteristic when at a first temperature and to assume a second characteristic when exposed to a second temperature and to substantially maintain the second characteristic even when again exposed to the first temperature.

Various implementations are directed to a method for detecting, by a device, an increase in temperature at certain parts of an electrical system, and taking appropriate responsive action. The method may include measuring temperatures at certain locations within the system and estimating temperatures at other locations based on the measurements. Some embodiments include an integrated cable combining electrical conduction and heat-detection capabilities, or an integrated cable or connector combining electrical conduction with a thermal fuse.

Various implementations are directed to a method for detecting, by a device, an increase in temperature at certain parts of an electrical system, and taking appropriate responsive action. The method may include measuring temperatures at certain locations within the system and estimating temperatures at other locations based on the measurements. Some embodiments include an integrated cable combining electrical conduction and heat-detection capabilities, or an integrated cable or connector combining electrical conduction with a thermal fuse.