Mechanism for measuring device

G - Physics – 01 – L

Patent

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Details

G01L 7/08 (2006.01) A61B 5/022 (2006.01) G01L 7/06 (2006.01)

Patent

CA 2277059

A gage mechanism for a blood pressure measuring device or other similar apparatus includes a supported shaft member (96) having one end in contact with an inflatable bellows (34). A pointer (92) is attached at an opposite end of the shaft and a helically wound ribbon spring (106) is attached to the shaft and a supporting structure (122). As the bellows inflates, the shaft is axially displaced and causes rotation due to the constraint of the helical ribbon spring, causing a corresponding angular deflection of the attached pointer relative to an indicating scale (85). The mechanism includes a first adjustment member (118) for allowing the pointer to be preset to a zero or calibrated position, and a second adjustment mechanism that controls the amount of angular rotation of the shaft and pointer for a displacement of the bellows.

L'invention concerne un mécanisme de calibrage pour appareil de mesure de la pression artérielle ou analogue, comportant une tige (96) portée dont une extrémité est au contact de soufflets (34) gonflables. Une aiguille (92) est fixée au niveau de l'extrémité opposée de la tige et un ressort ruban (106) enroulé en hélice est fixé à la tige et à une structure de support (122). A mesure que les soufflets se gonflent, la tige est déplacée dans le sens axial et provoque une rotation sous l'effet de la contrainte du ressort ruban hélicoïdal, ce qui entraîne une déviation angulaire correspondante de l'aiguille fixée par rapport à une échelle (85) de graduation. Le mécanisme comprend un premier élément (118) de réglage permettant à l'aiguille d'être préréglée sur zéro ou sur une position de calibrage, et un second mécanisme de réglage commandant l'amplitude de la rotation angulaire de la tige et de l'aiguille correspondant à un déplacement des soufflets.

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