Capacitive tuning screw
US4598334A · kind A · utility
2Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1985 |
| Grant date | Jul 1, 1986 |
| Priority date | — |
| Expiry date | Feb 7, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B35/044
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A capacitive tuning screw comprises a threaded portion with a longitudinal cavity for slidably receiving a plunger shaft. If the capacitive element on the tip of the plunger shaft contacts the corresponding capacitive element on the surface of an electrical circuit board or substrate, further turning of the screw will cause the shaft to slide into the cavity and prevent crushing the circuit board or substrate. A shoulder on the screw stops rotation and longitudinal movement of the screw before the entire length of the plunger shaft slides into the cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.