Method for the calibration or checking of dynamometers and appar

Details Method for the calibration or checking of dynamometers and appar Method for the calibration or checking of dynamometers and appar

1976-12-16

1978-05-23

Swisher, S. Clement

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

G01L 2500

Patent

active

040903931

ABSTRACT:
The method for the calibration or checking of dynamometers consists of applying a force to the dynamometer being subjected to calibration or checking through a master dynamometer. The force applied is progressively changed in magnitude, and after each such application the force applied to the dynamometer being subjected to calibration or checking is retained, simultaneously relieving the master dynamometer of the force. In said method, a force may also be applied directly to the dynamometer being subjected to calibration or checking by means of standard weights.
The apparatus for the calibration or checking of dynamometers incorporates two frames one of which is rigidly attached and the other is movable relative to the first one. Interposed between the frames is the dynamometer being subjected to calibration or checking and interacting therewith is a means of applying a force which applies a calibrated force through a master dynamometer. The apparatus incorporates another means of applying a force only to the dynamometer being subjected to calibration or checking which assures that the master dynamometer is relieved of the force applied.
The method and apparatus offer the prospect of checking and calibrating dynamometers against forces in excess of 10,000 kN with practically no upper limit and an error never higher than between 0.25 and 0.5%.

REFERENCES:
patent: 3194050 (1965-07-01), Ruge

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