Electrical thermometer

Claim 2

A temperature-sensing device adapted to determine the temperature of the human body comprising: an electrically conductive wheatstone bridge circuit having four resistive legs and two pairs of opposed terminals, three of said four resistive legs being fixed resistors; the fourth leg comprising, in series with each other, a resistor which is temperature sensitive within the usual range of human body temperature and which comprises a hollow tubular member having threads at one end, said member having a resistive coating which is temperature sensitive within the usual range of human body temperatures and wherein said coating has been removed from the lands of said threads, and a manually adjustable resistor; a power source for said bridge connected across one pair of opposed terminals of said bridge; and an ammeter across the other pair of opposed terminals of said bridge, said ammeter having a visual readout portion calibrated in degrees to indicate human body temperature.

Claim 3

A temperature-sensing device adapted to determine the temperature of the human body comprising: an electrically conductive wheatstone bridge circuit having four resistive legs and two pairs of opposEd terminals, three of said four resistive legs being fixed resistors; the fourth leg comprising in series with each other a thermistor which is temperature sensitive within the usual range of human body temperature and which comprises a hollow tubular plastic member having external threads at one end, said member having a resistive metallic coating which is temperature sensitive within the usual range of human body temperatures and wherein said coating has been removed from the lands of said threads, and a manually adjustable resistor; a power source for said bridge connected across one pair of opposed terminals of said bridge; and an ammeter across the other pair of diagonally opposed terminals of said bridge, said ammeter having a visual readout portion calibrated in degrees to indicate human body temperature.

Claim 4

A temperature-sensing device adapted to determine the temperature of the human body comprising: an electrically conductive wheatstone bridge circuit having four resistive legs and two pairs of opposEd terminals, three of said four resistive legs being fixed resistors; the fourth leg comprising in series with each other a thermistor which is temperature sensitive within the usual range of human body temperature and which comprises a hollow tubular plastic member having external threads at one end, said member having a resistive metallic coating which is temperature sensitive within the usual range of human body temperatures and wherein said coating has been removed from the lands of said threads, and a manually adjustable resistor; a power source for said bridge connected across one pair of opposed terminals of said bridge; and an ammeter across the other pair of diagonally opposed terminals of said bridge, said ammeter having a visual readout portion calibrated in degrees to indicate human body temperature.

Claim 5

A temperature-sensing device adapted to determine the temperature of the human body comprising: an electrically conductive wheatstone bridge circuit having four resistive legs and two pairs of opposed terminals, three of said four resistive legs being fixed resistors; the fourth leg comprising in series with each other a resistor which is temperature sensitive within the usual range of human body temperature and which comprises a hollow tubular member having external threads at one end, said member having a resistive coating which is temperature sensitive within the usual range of human body temperatures and wherein said coating has been removed from the lands of said threads, and a manually adjustable resistor; a power source for said bridge connected across one pair of opposed terminals of said bridge; and comprising at least one battery; and an ammeter across the other pair of diagonally opposed terminals of said bridge, said ammeter having a visual readout portion calibrated in degrees to indicate human body temperature.

Claim 6

A temperature-sensing device adapted to determine the temperature of the human body comprising: an electrically conductive wheatstone bridge circuit having four resistive legs and two pairs of opposed terminals, three of said four resistive legs being fixed resistors; the fourth leg comprising in series with each other a resistor which is temperature sensitive within the usual range of human body temperature and which comprises a hollow tubular member having external threads at one end, said member having a resistive coating which is temperature sensitive within the usual range of human body temperatures and wherein said coating has been removed from the lands of said threads, and a manually adjustable resistor; a power source for said bridge connected across one pair of opposed terminals of said bridge; and comprising at least one battery; and an ammeter across the other pair of diagonally opposed terminals of said bridge, said ammeter having a visual readout portion calibrated in degrees to indicate human body temperature.

Claim 7

A self-contained temperature-sensing device used to determine the temperature of the human body comprising a body member, received in said body member a power source; an electrically conductive wheatstone bridge circuit having four resistive legs and two pairs of opposed terminals, three of said four resistive legs being fixed resistors; the fourth leg comprising in series with each other a manually adjustable resistor, and a resistor which is temperature sensitive within the usual range of human body temperature and which comprises a hollow tubular member having external threads at one end, said member having a resistive coating which is temperature sensitive within the usual range of human body temperatures and wherein said coating has been removed from the lands of said threads, said power source being connected across one pair of opposed terminals of said bridge; said temperature-sensitive resistor being disposed on said body member so as to be adapted to be inserted in an opening of the human body; and an ammeter across the other pair of diagonally opposed terminals of said bridge, said ammeter having a visual readout portion calibrated in degrees to indicate human body temperature.

Claim 8

A self-contained temperature-sensing device used to determine the temperature of the human body comprising a body member, received in said body member a power source; an electrically conductive wheatstone bridge circuit having four resistive legs and two pairs of opposed terminals, three of said four resistive legs being fixed resistors; the fourth leg comprising in series with each other a manually adjustable resistor, and a resistor which is temperature sensitive within the usual range of human body temperature and which comprises a hollow tubular member having external threads at one end, said member having a resistive coating which is temperature sensitive within the usual range of human body temperatures and wherein said coating has been removed from the lands of said threads, said power source being connected across one pair of opposed terminals of said bridge; said temperature-sensitive resistor being disposed on said body member so as to be adapted to be inserted in an opening of the human body; and an ammeter across the other pair of diagonally opposed terminals of said bridge, said ammeter having a visual readout portion calibrated in degrees to indicate human body temperature.

Claim 9

The device of claim 4 wherein the power source comprises one or more dry cell batteries.

Claim 10

The device of claim 1 wherein said plastic member is made of a material capable of being passed through the intestinal tract.