The United States of America As Represented by the Administrator of the

The United States of America As Represented by the United States

United States of America As Represented by the Administrator of Nasa

John D Buckley

Robert L Fox

Robert H Coultrip

Robert J Swaim

David F Johnston

Samuel D Johnson

Terry L St Clair

Donald J Progar

Bruce D Little

Carl E Copeland

W Morris Phillips

William Christopher Edwards

James R Dinkins

Timothy D Schott

Richard H Couch

Warren C Kelliher

John R Gleason

Copeland, Carl E

Ingrid A Carlberg

Alan W Frizzill

Bland A Stein

A wave energy transmission apparatus has a conduit made from a refractory oxide. A transparent, refractory ceramic window is coupled to the conduit. Wave energy passing through the window enters the conduit.

Wave energy transmission apparatus for high-temperature environments

A method for bonding or joining plastic or metallic pipe using induced energy is provided. A susceptor is placed between the two pipes to be joined and a magnetic flux is induced onto the susceptor. The second pipe may be a coupling device. The magnetic flux may be induced by a tank circuit or an induction heating gun. The induction heating gun may be formed with a hinged heating head. The susceptor may be a perforated metal ring or a wire coil. The susceptor is coated with a material compatible with the pipes, for example, a plastic adhesive material, magnetic flux is an induction heating gun having a hinged heating head.

Inductive systems for bonding and joining pipes

An induction heating device includes a handle having a hollow interior and two opposite ends, a wrist connected to one end of the handle, a U-shaped pole piece having two spaced apart ends, a tank circuit including an induction coil wrapped around the pole piece and a capacitor connected to the induction coil, a head connected to the wrist and including a housing for receiving the U-shaped pole piece, the two spaced apart ends of the pole piece extending outwardly beyond the housing, and a power source connected to the tank circuit. When the tank circuit is energized and a susceptor is placed in juxtaposition to the ends of the U-shaped pole piece, the susceptor is heated by induction heating due to a magnetic flux passing between the two ends of the pole piece.

Induction heating coupler

A method is provided to bond strain gauges 6 to various materials. First, a tape 9 with an adhesive backing 10 is placed across the inside of fixture frame 8. Strain gauge 6 is flatly placed against adhesive backing 10 and coated with a thin, uniform layer of adhesive 5. Tape 9 is then removed from fixture frame 8 and placed, strain gauge side down, on the material to be tested. If the material is a high reluctance material 12, induction heating source 20 is placed upon tape 9. If the material is a low reluctance material 13, a plate 23 with a ferric side 21 and a rubber side 22 is placed, ferric side down, onto tape 9. Induction heating source 20 is then placed upon rubber side 22. If the material is an insulator material 14, a ferric plate 7 is placed on tape 9. Induction heating source 20 is then placed on ferric plate 7. Inductive heating source 20 then generates frequency from 60 to 70 kilocycles to inductively heat either low reluctance material 13, ferric side 21, or ferric plate 21 and provides incidental pressure of approximately five pounds per square inch to tape 9 for two minutes, thoroughly curing adhesive 5. Induction heating source 20, and, if necessary, plate 23 or ferric plate 7, are then removed from tape 9 after one minute. Tape 9 is then removed from bonded strain gauge 6.

Method of attaching strain gauges to various materials

This device for inductively heating and fusing thermoplastics includes an alternating current passing through a tank circuit, the inductor member of the tank circuit being wrapped around a curved pole piece of a ferromagnetic material. The magnetic flux arising within the inductor coil member flows to the ends of the pole piece and into a screen placed between the materials to be joined. The flux induces a current in the screen, and heat is generated to melt the thermoplastics together. Because only 30-150 watts of power are passed through the tank circuit, a wire which will remain cool under operational wattage may be selected, making air or fluid cooling unnecessary.

Induction heating gun

The invention relates to a hot melt adhesive attachment pad for releasably securing distinct elements together and particularly useful in the construction industry or a spatial vacuum environment. The attachment pad consists primarily of a cloth 11 selectively impregnated with a charge of hot melt adhesive 12, a thermo-foil heater 13 and a thermo-cooler 14. These components are securely mounting in a mounting assembly 17 and 18. In operation, the operator activates the heating cycle transforming the hot melt adhesive to a substantially liquid state, positions the pad against the attachment surface, and activates the cooling cycle solidifying the adhesive and forming a strong, releasable bond.

Hot melt adhesive attachment pad

This fastener used in induction heating is a wire screen basically of an eddy-current carrying material such as carbon steel. Selected wires in the screen are copper, sheathed in an insulating material. The screen is placed between two sheets of thermoplastics. When inductively heated, the composite softens and flows around the apertures of the screen. After this heating and joining, the copper wires may be used to conduct electricity.

One-step dual purpose joining technique

Growing community of inventors

Newport News, VA, United States of America

John D Buckley