Replaceable sensing and indicating element for a bi-metallic thermometer
AssigneePalmer Instruments, Inc.
InventorsDan B. Young, Benjamin L. Binford
Life of this patent
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Abstract
A replaceable sensing and indicating element for a bi-metallic thermometer of the type having an enclosure and a stem. The sensing and indicating element comprises a stem terminating in a bi-metal helical temperature sensing coil, a shaft extending inside the stem from the coil, an indicating pointer secured to the shaft, a calibrated temperature scale, adjustment means for orienting the scale, and a connector affixed to the sensing element stem. The sensing element is telescopically received within the thermometer enclosure and stem and is held in place by a bezel ring and restraining means. Accordingly, the sensing element may be easily removed from and replaced in the enclosure.
Claims4
In a bi-metallic thermometer of the type having an enclosure secured to support means for mounting said thermometer in an operating environment, the improvement in combination therewith comprising, a replaceable sensing and indicating element for sensing temperatures, said element being selectively movable and providing a visual indication of the temperature of said operating environment, said element being easily removable from and replaceable in said enclosure, said element comprising a stem terminating in a bi-metal helical temperature sensing coil rotatable with changes in temperature, a shaft extending from said coil and disposed within said stem for transmitting the rotary motion of said coil, an indicating pointer secured to said shaft, and a calibrated scale affixed to said stem and adjacent with said pointer for providing a visual indication of said temperature, and restraining means coacting with said element to maintain said element in said enclosure.
Dependencies are inferred from the claim text.