A tubular member of the type, primarily intended for utilization in a boiler, and having rifling, ie, ribbing, provided on the internal surfaces thereof that is operable for purposes of effecting the disruption of the internal flow of the fluid passing therethrough The ribbing with which the subject tubular member is provided embodies a configuration that is preselected so that the ribbing is operative to enable accurate and precise control to be exercised through the use thereof over the movement of the fluid flowing through the tubular member Consideration is given to the following factors, among others, in establishing the design criteria that, in turn, determines the configuration that the ribbing embodies in a given tubular member; namely, the type of fluid; the fluid pressure; the fluid flow rate; the internal dimensions of the tubular member; the temperature gradient within the tubular member wall, both circumferentially and longitudinally, etc The aforementioned design criteria includes parameters selected from variations possible in the angle which the ribbing bears to the lateral axis of the tubular member; variations possible in the spacing between individual ribs of the ribbing; whether the ribbing is continuous or noncontinuous; whether the ribbing is provided on only one side wall of the tubular member or on more than one side wall thereof; and the particular dimensions of the rib design in terms of the specific height, the specific width, the specific radii and the specific angles that each individual rib embodies

Rib design for boiler tubes

Movable air conditioning apparatus

A water heater having the inner door that closes the inner access opening leading into the combustion chamber formed as a component part of a unitary manifold assembly which also includes the main burner with its manifold gas supply tube, the pilot burner with its gas supply tube, and the pilot burner control thermocouple with its support tube. The inner door thus may not be removed for servicing of the water heater unless the complete manifold assembly is removed from the inner access opening, in which case the water heater is then rendered inoperative and incapable of main burner ignition to produce burner flames which could otherwise spill-out through an uncovered inner access opening left open by an unreplaced inner door. The inner door component of the manifold assembly has a pilot burner lighting port which is normally closed off by a spring loaded door and which also enables observation of the pilot and main burner flames.

Water heater with flame spill-out prevention arrangement

Gas-fired infra-red generators with porous ceramic fiber panels through the thickness of which combustion mixture flows and on the emerging surface of which it burns, have constructions that enable a group to be mounted close together, and have various arrangements to reduce the temperature of the burner mouth in which the panels are mounted. Self-contained electric ignition is also shown, as is the use of dark infra-red re-radiators in the radiation path to return energy that penetrates an article being irradiated.

Gas-fired infra-red generators and use thereof

A gerotor pump has a rotatable, lobed rotor with n lobes meshed with a rotable lobed annulus with n+1 lobes, the two being conjointly and relatively rotatable about parallel axes. The lobes of both the rotor and the annulus spiral helically to smooth pressure peaks and reduce noise.

Gerotor pump having spiral lobes

This invention relates to burners in general and particularly to automatically controlled burners More specifically, the invention relates to regulating mechanism for automatically controlled 6 burners The primary object of the present invention is to provide regulating mechanism which

Burner regulating mechanism

This invention relates to ignition systems and more particularly to an ignition system for a liquid fuel burner which is adapted effectively to initiate combustion of fuel and promote efficient burning This application is a continuation in part of my copending application, Serial Number 504,585,

Ignition system for pot-type oil burners

Internal-gear pump

A resistance welding apparatus (10) is disclosed which is particularly adapted for use in welding parts (27) into the interior surface of a metal tube (17) in a pre-determined pattern obtained by longitudinal and rotational indexing of the tube An elongated electrode arm (20) extends into the tube and has a feed track (35) attached thereto through which the metal pieces (27) to be welded are moved down the length of the electrode arm (20) The other end of the electrode arm (20) is rigidly connected to a mount (21) and is electrically insulated therefrom At the end of the feed track (35), a lever (61) aligns the lead metal piece so as to be at the same level as an end support (43), and a pusher lug (41) advances the metal piece to the end support (43) A piston (46) carried by the end support and acting against the inside wall of the tube moves the end support (43) transversely of the electrical arm to bring the piece (27) to be welded into pressure contact with the inside of the tube (17) Electrical current is then passed through the electrode arm (20) and the piece to be welded, to the tube (17), and then to a grounded contact (47), to resistance weld the metal piece to the tube (17)

Oscar L Bock

Papers

Burner regulating mechanism

Ignition system for pot-type oil burners

Internal-gear pump

Resistance welding apparatus

Flue conduit with internal heat transfer elements