Machine element or mechanism – Mechanical movements – Rotary to reciprocating and alternating rotary
Patent
1976-03-15
1977-04-12
Scott, Samuel
Machine element or mechanism
Mechanical movements
Rotary to reciprocating and alternating rotary
74 56, F16H 2100
Patent
active
040167682
ABSTRACT:
This invention comprises a rotatable annular probe-positioner which carries at least one radially disposed sensing probe, such as a Pitot tube having a right-angled tip. The positioner can be coaxially and rotatably mounted within a compressor casing or the like and then actuated to orient the sensing probe as required to make measurements at selected stations in the annulus between the positioner and compressor casing. The positioner can be actuated to (a) selectively move the probe along its own axis, (b) adjust the yaw angle of the right-angled probe tip, and (c) revolve the probe about the axis common to the positioner and casing. A cam plate engages a cam-follower portion of the probe and normally rotates with the positioner. The positioner includes a first-motor-driven ring gear which effects slidable movement of the probe by rotating the positioner at a time when an external pneumatic cylinder is actuated to engage the cam plate and hold it stationary. When the pneumatic cylinder is not actuated, this ring gear can be driven to revolve the positioner and thus the probe to a desired circumferential location about the above-mentioned common axis. A second motor-driven ring gear included in the positioner can be driven to rotate the probe about its axis, thus adjusting the yaw angle of the probe tip. The positioner can be used in highly corrosive atmosphere, such as gaseous uranium hexafluoride.
REFERENCES:
patent: 1323536 (1919-12-01), McDaniel et al.
patent: 1490656 (1924-04-01), Bignan
patent: 2780421 (1957-02-01), Herr
patent: 2791121 (1957-05-01), Morrill
patent: 3785212 (1974-01-01), Eminger
Mashburn Douglas N.
Stevens Richard H.
Woodall Harold C.
Carlson Dean E.
Lewis Fred O.
Ratliff, Jr. Wesley S.
Scott Samuel
The United States of America as represented by the United States
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