FREQUENCY TYPE PRESSURE PICKUP Russian patent published in 2001 - IPC

FIELD: systems for measuring fluid pressure, possibly in switching devices. SUBSTANCE: apparatus includes membrane or aneroid box 1 sensing measured pressure signal. Membranes of box through rigid centers 2,3 transfer effort to string 5. Change of string oscillations are converted to output frequency signal corresponding to measured pressure. In order to provide possibility of using pickup of the same structure in different ranges of measured pressure, effort of action of springs 16,17 on respective rigid centers 2,3 is adjusted for redistributing forces transferred by rigid centers 2,3 to string 5 and for providing standard characteristics of pickup. Tuning of spring effort acting upon rigid centers is realized by means of adjustment screws 18,19. EFFECT: reduced assortment of products due to enlarged operational range of pickup. 2 dwg