Measuring and testing – Vibration – Vibrator
Patent
1978-04-19
1980-01-01
Myracle, Jerry W.
Measuring and testing
Vibration
Vibrator
251304, G01N 2900
Patent
active
041810252
ABSTRACT:
A spherical shaped plate and an orifice opening are oriented such that the edge of the plate can span and cover part of the orifice opening. Stops are provided to prevent a full 360.degree. rotation. The plate shape and wedge opening can be configured such that, as the angular position of the plate changes, the orifice area changes according to the predetermined relationship. The plate and the opening may be enclosed in a gas tight housing, with a stepping motor exterior to the housing coupled via a shaft passing through the housing to the plate. The plate angular position versus orifice area relationship is determined in combination with a desired linear angular position versus gas pressure curve, for use in copending patent application Ser. No. 897,821, filed herewith entitled "Quasi-Random Pneumatic Vibration Facility and Automatic Frequency Modulating System Therefor" by Henry T. Abstein, Jr., Dennis B. Page, James M. Kallis, Charles F. Talbott, Jr. and Richard L. Baker.
REFERENCES:
patent: 3646807 (1972-03-01), Gray et al.
patent: 3691822 (1972-09-01), Deckard
patent: 3779510 (1973-12-01), Krogsrud
Abstein, Jr. Henry T.
Page Dennis B.
Hughes Aircraft Company
MacAllister W. H.
Myracle Jerry W.
Sternfels Lewis B.
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