Thermal measuring and testing – Thermal calibration system – By thermal radiation emitting device
Reexamination Certificate
1999-06-09
2001-02-27
Bennett, G. Bradley (Department: 2859)
Thermal measuring and testing
Thermal calibration system
By thermal radiation emitting device
C374S208000, C374S209000, C374S210000, C374S001000
Reexamination Certificate
active
06193411
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a calibrator for thermometers and, more specifically, relates to a double-duty calibrator for contact and non-contact thermometers.
2. Description of the Related Art
The measurement and control of temperature is widely applied and plays an important role in industry. Thermometers are classified into contact and non-contact types based on the method of utilization. There are various kinds of contact thermometers, such as resistance thermometers, thermocouple and liquid-in-glass thermometers. The non-contact thermometers are mainly directed to radiation thermometers.
Thermometers must be calibrated periodically in order to obtain accurate temperature measurement and control. Calibrators for contact and non-contact thermometers differ basically because of different utilization and measuring ranges. Thus, two sets of calibrators are required for calibrating contact and non-contact thermometers respectively. There are several disadvantages for purchasing two sets of calibrators, for example, involving high cost and requiring more space.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a novel and practical calibrator for contact and non-contact thermometer. The present invention performs double-ditty and is convenient to use.
Another object of the present invention is to provide a novel and practical calibrator for contact and non-contact thermometers thus avoiding the necessity of purchasing two sets of calibrators and there by reducing costs.
A further object of the present invention is to provide a novel and practical calibrator for contact and non-contact thermometers that saves space.
To achieve the objectives mentioned above, the present invention discloses a novel calibrator for thermometers. In one embodiment of the present invention, a cylindrical shape body is provided. One surface of the cylinder is coated with a heat-resistant and high emissivity coating as a standard radiation source for calibrating non-contact thermometers, and the other surface of the cylinder is drilled with several holes for insertion of various sizes of contact thermometers in order to calibrate contact thermometers. No matter contact or non-contact type, the thermometers can be calibrated by the calibrator of the present invention. Thus, the expense in equipment and space could be saved.
The present invention will be elucidated with reference to the accompanying drawings which, however, are being presented for illustrative purposes only.
REFERENCES:
patent: 3348408 (1967-10-01), Engborg
patent: 3350915 (1967-11-01), Staffin
patent: 3435622 (1969-04-01), Barton et al.
patent: 3499294 (1970-03-01), Barton et al.
patent: 3631708 (1972-01-01), Ensor
patent: 5820261 (2000-08-01), Yam
patent: 6056433 (2000-05-01), Yam
patent: 6086245 (2000-07-01), Yam
patent: 6106148 (2000-08-01), Moslehi et al.
patent: 0148552 (1962-01-01), None
Bennett G. Bradley
Industrial Technology Research Institute
Kenyon & Kenyon
Verbitsky Gail
LandOfFree
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