Ravenscroft Ivor Albert, Jackson Lynden Ashrooke: Dielectric waveguides. The Post Office, November 21, 1972: US3703690 (126 worldwide citation)

A dielectric waveguide for millimetric wavelengths comprising a core of polymer material supported by a body of foamed polymeric material and enclosed in a protective jacket.

Sturgess Geoffrey John, Hoffman Jacob Sherman, Vdoviak John William, Hirschkron Robert: Air blast fuel atomizer. General Electric Company, November 21, 1972: US3703259 (100 worldwide citation)

An air blast fuel atomizer for establishing a highly atomized fuel dispersion at the confluence of two counter-rotating air swirls, wherein a uniform concentration of fuel is disposed on a circumferential shroud and directed to the atomization forces at the lip of the shroud.

McVoy David S: Channel monitoring system for audience survey purposes. Coaxial Scientific Corporation, November 21, 1972: US3703684 (100 worldwide citation)

A coaxial cable system for television communications or the like comprises an arrangement for sending a control signal selectively on the audio sub-carrier of each of a number of television channels. Receivers connected to the cable have circuitry for detecting the presence of the control signal whe ...

Ryckman Jr William D: Oral hygiene apparatus. General Electric Company, November 21, 1972: US3703170 (97 worldwide citation)

Oral hygiene apparatus of the variable pressure pulsed liquid jet type that includes a hand-held unit and a liquid reservoir which may be separate or incorporated in the hand-held unit. The unit contains an electric motor, electrical energy supply means, a pulsating pump and a pressure regulator tha ...

Philipson Jr Herman L: System for document coding and identification. Recognition Equipment Incorporated, November 21, 1972: US3703628 (89 worldwide citation)

Method and apparatus for sensing human readable intelligence bearing indicia on documents with high resolution, by generating primary signals representatives of said indicia with translation thereof into simplified bar code, printing the simplified code on the document itself, preferably during cont ...

Berman Herbert L: Infrared intrusion detector system. Optical Coating Laboratory, November 21, 1972: US3703718 (88 worldwide citation)

Infrared intrusion detector system utilizing a single sensing element and optical means for focusing radiation from one or more discrete fields of view onto the sensing element. An amplifier tuned to have a frequency response corresponding to the walking speed of an intruder amplifies the signal fro ...

Vassiliadis Arthur, Zweng Harold C, Peppers Norman A, Alterton Lloyd E: Slit lamp photocoagulator. Stanford Research Institute, Stanford University, November 21, 1972: US3703176 (80 worldwide citation)

A combination slit lamp and laser photocoagulator for treating eye disorders in which the laser is coupled to the slit lamp through an articulated arm. The slit lamp optics are arranged such that the laser beam is always in focus at the focus of the slit lamp and one lens in the laser optics is mova ...

Andrews Maurice: Remote alarm system. November 21, 1972: US3703714 (75 worldwide citation)

A remote alarm system for transmitting an alarm signal to a remote receiver when unauthorized access to a given installation is attempted. A remote portable radio transceiver is capable of receiving signals through the atmosphere from and transmitting signals through the atmosphere to a stationary r ...

Blowers William L: Temperature-controlled integrated circuits. Kollmorgen Corporation, November 21, 1972: US3703651 (74 worldwide citation)

An integrated circuit comprising several transistors on a chip is maintained at a constant temperature by utilizing certain of the transistors as heating elements and other transistors as temperature sensors in a closed loop feedback network. The remaining transistors--not thus utilized for temperat ...

Krebs James N, Paulson Elmir E: Gas turbine engine. General Electric Company, November 21, 1972: US3703081 (67 worldwide citation)

The disclosure shows two gas turbine engines particularly suited to propulsion of V/STOL aircraft. The engines are characterized by a short axial length relative to diameter which is attributable to several features. These features include, singly and in combination, a toroidal combustion chamber ha ...