Variometer comprising a measuring box

Details Variometer comprising a measuring box Variometer comprising a measuring box

1975-05-28

1976-06-22

Woodiel, Donald O.

Measuring and testing

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G01C 2100

Patent

active

039643077

ABSTRACT:
The variometer includes a measuring chamber communicating with the atmosphere through a first passageway and an elastically deformable measuring box, positioned within the measuring chamber, communicating with the atmosphere through a second passageway. One of the passageways, preferably the second passageway, is provided with a system of orifice inserts serving to delay pressure equalization between the measuring chamber and the measuring box. The system of orifice inserts includes at least two orifice inserts with successive orifice inserts being separated from each other by an intermediate space. The orifice inserts are threaded into the internally threaded bore of a hollow screw, and preferably three orifice inserts are provided so as to define two intermediate spaces. At least one of the orifice inserts is displaceable axially of the hollow screw, and preferably two orifice inserts are so displaceable. Each orifice insert is a hollow externally threaded member in which the orifice is formed in a bore through a jewel or the like at one end of the orifice insert.

REFERENCES:
patent: 2309400 (1943-01-01), Kollsman

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