JET ADJUSTMENT MEANS FOR FLUID JET DEFLECTION TYPE INSTRUMENTS

• US 3,581,578 A
• Filed: 06/05/1969
• Issued: 06/01/1971
• Est. Priority Date: 06/05/1969
• Status: Expired due to Term

• Current Assignee: Wilfred C. Schusemann
• Original Assignee: Wilfred C. Schusemann
• Inventors: Schusemann, Wilfred C.
• Application Number:
  US04/830,828
• Time in Patent Office: 726 Days
• US Class Current: 73/504.06
• CPC Class Codes: G01C 19/58 Turn-sensitive devices without moving masses
• CPC Class Codes: G01P 15/038 by using fluidic means

Abstract

An instrument wherein the deflection of a fluid jet, induced for example by the angular movement of the instrument, produces a signal proportional to the deflection, and particularly, such an instrument having means for adjusting the jet into a centered condition relative to the sensing means. The means herein disclosed comprises a plurality of adjusting elements such as setscrews that are turned down to provide an obstruction in the flow path of the fluid to the jet nozzle, the adjusting elements being located adjacent to and symmetrically about the nozzle inlet.

Claims

1. A fluid jet deflection type instrument comprising:

a body having a jet chamber, nozzle means having a nozzle for directing a fluid jet endwise of said jet chamber, sensing means disposed in said jet chamber remote from said nozzle and symmetrically relative to the axis thereof and adapted to respond to deflection of a fluid jet from a centered condition relative thereto, said body having exhaust means beyond said sensing means from said nozzle for exhausting fluid from said jet chamber, means for supplying fluid under pressure to said nozzle including a plenum chamber having the intake end of said nozzle opening into the same and fluid inlet means for introducing fluid into said plenum chamber substantially symmetrically about the axis of said nozzle, and means for centering a fluid jet discharged by said nozzle onto said sensing means, said means comprising a plurality of elements extending into said plenum chamber between said nozzle and said inlets for obstructing the flow of fluid through said plenum chamber to said nozzle, and means for adjusting said elements individually for varying the obstruction provided by the same in the plenum chamber.

2. A fluid jet deflection type instrument in accordance with claim 1 in which said elements are adjustable endwise.

3. A fluid jet deflection type instrument in accordance with claim 2 in which said elements comprise screws.

4. A fluid jet deflection type instrument in accordance with claim 3 in which said elements are disposed on an axis parallel to the axis of said nozzle and are threaded through an end wall of said plenum chamber opposed to said nozzle.

5. A fluid jet deflection type instrument in accordance with claim 4 in which said inlets are arranged about the periphery of said nozzle and are open into said plenum chamber on the same side thereof as said nozzle.

6. A fluid jet deflection type instrument in accordance with claim 1 in which said sensing means comprises a pair of spaced thermistors.