Class 333/163 - Having plural concentric helices

Subclass of Class 333 - Wave transmission lines and networks
Definition: Subject matter wherein the structure for retarding wave
No. of patents: 4
Last issue date: 05/03/1994

Number	Title	Issue Date
5309125	Compact delay line formed of concentrically stacked, helically grooved, cylindrical channel-line structure A miniaturized cylindrical `channeline` delay line comprises a plurality of concentrically stacked cylindrical elements, surfaces of which are configured to form helically contoured `channeline` transmission line. The nested stack includes a first, genera...	05/03/1994
4894628	Transmission delay line and method of manufacture A transmission delay line including a helical channel (2) formed in the surface of a cylinder (1), with a conductive sleeve (7) fitted to the cylinder to close the channel. A helical conductive member (4) is positioned within the channel (2) and spaced fr...	01/16/1990
4229676	Helical slow-wave structure assemblies and fabrication methods Helical slow-wave structure assemblies including a helical dielectric supporting member are disclosed along with methods for fabricating such assemblies. After the slow-wave structure helix is wound on a mandrel, a masking helix is coaxially wound about t...	10/21/1980
4004179	Slow wave circuit having serially connected contrawound two-turn helices As part of a microwave frequency device, such as a traveling wave tube, a novel slow wave structure is presented which comprises an electrically conductive wire formed into a series of interconnected loops which are spaced apart and parallel along a commo...	01/18/1977

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