Temperature measuring device
AssigneeCorning Incorporated
InventorsPeter J. Martuscello, Philip J. Rittenhouse
Life of this patent
Estimating the term…
Abstract
There is disclosed a maximum reading, temperature measuring device, such as a clinical thermometer, composed of a bulb containing an expandable liquid, such as mercury, an elongated tube with a central bore into which the liquid expands when heated, and a flow control member positioned intermediate the tube and bulb and sealed to each. The flow control member is a short length of tubing having a central bore that is sufficiently small in diameter to form a constriction that inhibits reverse flow of the liquid.
Claims7
In a maximum reading, temperature measuring device having a bulb containing a thermally expandable liquid, and an elongated tube having a central bore into which the liquid expands when heated, the improvement comprising a flow control member of essentially uniform characteristics and positioned intermediate the tube and the bulb and sealed to each, the flow control member being a short length of tubing having a central bore opening into both the tubing and the bulb, said bore being of a controlled size that is sufficiently smaller than that of the elongated tube so that normal reverse flow of the liquid is inhibited.
A maximum reading, temperature measuring device composed of a bulb containing a thermally expandable liquid, an elongated tube having a central bore into which the liquid expands when heated, and a flow control member of essentially uniform characteristics and positioned intermediate the tube and the bulb and sealed to each, the flow control member being a short length of tubing having a central bore opening into both the tube and the bulb, said bore being of a controlled size that is sufficiently smaller in size than that of the elongated tube so that normal reverse flow of the liquid is inhibited.
Dependencies are inferred from the claim text.