Thermometer Without Power Switch

Abstract

A thermometer without power switch is constituted by a body member without battery, battery cover or power switch and a tip member with a thermal contact surface secured to the body member. A thermal sensor mounted on the inside of the tip member is adapted for sensing a thermal contact surface and producing a temperature signal. A set of leas wires is coupled to the thermal sensor for transmission of the temperature signal. A tubular cylinder is disposed in the body member and a magnetic core is free to slide within the tubular cylinder. A coil of wire is wrapped around the tubular cylinder so that the magnetic core moves through the coil of wire when sliding through the tubular cylinder from one end to an opposite end. A capacitor is electrically connected to the coil of wire. A processor is electrically connected to the capacitor and the set of lead wires.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The invention relates to the field of thermometers, and more particularly to the field of motion powered thermometers.[0003]2. Description of the Related Art[0004]Electronic thermometers generally offer a great number of advantages over conventional glass and mercury thermometers for use in the health care field. Among the advantages of electronic thermometers are the elimination of sterilization procedures for glass thermometers, made possible by the use of disposable covers; elimination of the possibility of broken glass if a thermometer is dropped; a digital temperature display to eliminate temperature reading errors; and with proper circuit design and calibration, higher accuracy and resolution is possible with accurate measurement and display of tenths of a degree Fahrenheit being easily attainable.[0005]Such electronic thermometers typically use a chemical battery as a power supply. However, the electronic thermom...

AI Technical Summary

Benefits of technology

"The present invention provides a battery-free thermometer that includes a body member and a tip member with a thermal contact surface. The tip member has a thermal sensor for sensing the thermal contact surface and producing a temperature signal. The temperature signal is transmitted through a set of leas wires. A tubular cylinder is disposed in the body member, and a magnetic core is free to slide within the tubular cylinder. A coil of wire is wrapped around the tubular cylinder so that the magnetic core moves through the coil of wire when sliding through the tubular cylinder from one end to an opposite end. A capacitor is electrically connected to the coil of wire, serving as a motion electric power generator. A processor is electrically connected to the motion electric power generator and the set of lead wires. This allows for the battery-free thermometer to operate without the need for batteries or power switches. The processor can display the temperature reading on a display unit."

Problems solved by technology

However, the electronic thermometers are generally idle for a long time since patients only use the electronic thermometers while they are sick or feel uncomfortable.

Thus such electronic thermometers employing a chemical battery as a power supply are not environmentally friendly.

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