GRAVITY METRE Russian patent published in 2009 - IPC G01V7/02 

FIELD: instrument making.

SUBSTANCE: gravimetre comprises body 1 with mount frame 2 rigidly fixed on it 2. In mount frame 2 on elastic threads 3, metering frame 4 is suspended, in which on elastic threads 5 pendulum 6 is suspended with levers 7 and 8. Lower ends of the main 9 and additional 10 main springs are connected to pendulum 6 by means of levers, accordingly, 7 and 8, and their upper ends are fixed on mount frame 2 by means of technological rod 11. Thermoelastic coefficients of the main 9 and additional 10 main springs are equal and opposite in sign. Elastic moments of main 9 and additional 10 main springs of gravimetre are equal. Photoelectric transducer 12 consists of screen 13 with rectangular opening 14 in centre of screen 13, differential photocell 15 and light diode 16. Lower end of range spring 18 by means of lever 19 and lower end of measurement spring 20 by means of lever 21 are connected to measurement frame 4. Upper ends of range spring 18 and measurement spring 20 are connected, accordingly, to bellows devices 22 and 23.

EFFECT: improved accuracy of measurements.

1 dwg