Transverse-duct insertion type pressure averaging primary

An elongated transverse type pressure averaging primary system adapted to be inserted and mounted transversely within an air duct for sensing both total and static pressure of fluid flow within the duct, said pressure averaging primary system comprising:

• mounting plate means having inner and outer faces adapted to be connected to said duct;
• an elongated high pressure line secured to said mounting plate means and extending from said inner face of said mounting plate outwardly therefrom towards an opposite wall of said duct where said high pressure line includes a closed terminal end opposite said mounted plate means, said high pressure line further including an exiting opening opposite said closed terminal end;
• an elongated low pressure line secured to said mounting plate means and extending outwardly therefrom towards an opposite wall of said duct where the same includes a closed terminal end opposite said mounting plate means, said low pressure line further including an exiting opening opposite said closed terminal end;
• total pressure port means selectively spaced along said elongated high pressure line and communicatively connected therewith such that said port means acts to sense total pressure at selected points along said high pressure line such that the pressure signal emitted from said exiting end of said elongated high pressure line generally represents the average total pressure sensed by said total pressure port means;
• static pressure sensing means associated with said low pressure line and communicatively connected therewith for sensing static pressure of the fluid flow passing within said duct such that the pressure signal emitted from said exiting end of said low pressure line is representative of the static pressure of the fluid flow within said duct;
• support means associated with the end of said pressure averaging primary system opposite said mounting plate means for operatively connecting said primary system to said duct opposite the connection of said mounting plate means;
• interconnecting reenforcing means interconnecting said high and low pressure lines at selected points along their span;
• said interconnecting reenforcing means including shroud means secured to said high pressure line about selected port means formed therein so as to shroud and protect the respective port means;
• and wherein said shroud means includes extension means integrally formed therewith and extending therefrom for extending to said low pressure line and connecting therewith for structurally reenforcing said elongated insertion type primary and for directly coupling said high and low pressure lines together so as to form a rigid structure throughout the span of said primary system.