Manufacture of helical wave guides
US4090280A · kind A · utility
2Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1977 |
| Grant date | May 23, 1978 |
| Priority date | — |
| Expiry date | Jan 28, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/5191
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A machine for manufacturing circular section helical wave-guides and providing simultaneous calibration of the bore of the helix and snug fitting of the screen around the helix. The helix is loosely fitted in an enveloping tube and both tube and helix are drawn through a reducing die for drawing the tube down onto the helix. The bore of the helix is established by a mandrel and the outer surface of the helix is softened just before entering the die whereby the helix is welded to the inner surface of the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.