FLUID OPERATED SENSOR

• US 3,673,856 A
• Filed: 03/26/1970
• Issued: 07/04/1972
• Est. Priority Date: 01/20/1970
• Status: Expired due to Term

• Current Assignee: Pier L. Panigati
• Original Assignee: Pier L. Panigati
• Inventors: Panigati, Pier L.
• Primary Examiner(s): Prince, Louis R.
• Assistant Examiner(s): Henry, II, William A.
• Application Number:
  US05/022,953
• Time in Patent Office: 831 Days
• Field of Search: 73/37.5-37.7 33/DIG.2 239/463
• US Class Current: 73/37.5
• CPC Class Codes: F15B 5/003 characterised by variation of the pressure in a nozzle or the like, e.g. nozzle-flapper system

Abstract

Fluid operated sensor comprising a pipe member having one end open and an opposite end connected to a fluid operated control circuit. An annular nozzle surrounds at least a portion of the pipe member and has an annular orifice surrounding the open end of the pipe member. A pressure fluid input duct connected with a source of pressurized fluid opens into the annular nozzle at a distance from the annular orifice. It conveys a stream of fluid through the annular nozzle and allows the annular orifice to create a fluid jet in a detection direction of the sensor and to determine pressure conditions within the pipe member depending on the fluid jet.

Claims

1. A fluid operated sensor comprising a pipe member having one end open and an opposite end thereof connected to a fluid operated control circuit, an annular nozzle surrounding at least a portion of said pipe member and having an annular orifice surrounding said open end of said pipe member, at least one pressure fluid input duct connected with a source of pressurized fluid and opening into said annular nozzle at a distance from said annular orifice, thereby to convey a stream of fluid through said annular nozzle and to allow said annular orifice to create a fluid jet in a detection direction of the sensor and to determine pressure conditions within said pipe member depending on said fluid jet, at least one among said input duct and said annular nozzle having surface means imparting a helical movement to said stream of fluid passing through said annular nozzle, thereby to obtain a jet outgoing from said annular orifice, with a rotary movement component, said pipe member having at least one radial bleed hole in a portion thereof surrounded by said annular nozzle, wherein according to the improvement, said pipe member Has supporting means allowing rotation thereof about its axis thereby to adjust the angular position of said radial bleed hole with respect to said annular nozzle.

2. A fluid operated sensor comprising a pipe member having one end open and an opposite end thereof connected to a fluid operated control circuit, an annular nozzle surrounding at least a portion of said pipe member and having an annular orifice surrounding said open end of said pipe member, at least one pressure fluid input duct connected with a source of pressurized fluid and opening into said annular nozzle at a distance from said annular orifice, thereby to convey a stream of fluid through said annular nozzle and to allow said annular orifice to create a fluid jet in a detection direction of the sensor and to determine pressure conditions within said pipe member depending on said fluid jet, at least one among said input duct and said annular nozzle having surface means imparting a helical movement to said stream of fluid passing through said annular nozzle, thereby to obtain a jet outgoing from said annular orifice, with a rotary movement component, and wherein according to the improvement said surface means comprise baffles located at the connection of said input duct with said annular nozzle, said baffles directing the fluid stream in a direction tangential to said annular nozzle.

3. A fluid operated sensor comprising a pipe member having one end open and an opposite end thereof connected to a fluid operated control circuit, an annular nozzle surrounding at least a portion of said pipe member and having an annular orifice surrounding said open end of said pipe member, at least one pressure fluid input duct connected with a source of pressurized fluid and opening into said annular nozzle at a distance from said annular orifice, thereby to convey a stream of fluid through said annular nozzle and to allow said annular orifice to create a fluid jet in a detection direction of the sensor and to determine pressure conditions within said pipe member depending on said fluid jet, at least one among said input duct and said annular nozzle having surface means imparting a helical movement to said stream of fluid passing through said annular nozzle, thereby to obtain a jet outgoing from said annular orifice, with a rotatory movement component and wherein according to the improvement said surface means comprise fins within said annular nozzle and imparting a helical movement to the stream passing through said annular nozzle.