The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 1976
Filed:
May. 28, 1975
Dirk Huhne, Frenkendorf, CH;
Revue Thommen AG, , CH;
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.