Variable electric resistor device
US4001759A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 1975 |
| Grant date | Jan 4, 1977 |
| Priority date | — |
| Expiry date | Dec 22, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C10/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable electric resistor device comprises a block of electrical insulating material. An elongated member of current resistive metal is removably positioned in the insulating material. A pair of electrically conductive terminal leads are each electrically connected to a corresponding end of the current resistive member. An elongated ancillary member of electrically conductive material is embedded in the insulating material in spaced parallel relation with the current resistive member. A plurality of spaced transverse internally threaded bores are formed through the ancillary member. A plurality of spaced bores are formed through the block extending from both sides of the internally threaded bores from the current resistive member to a surface of the block. A plurality of electrically conductive screws are each threadedly coupled to a corresponding one of the threaded bores and extend in the corresponding bore thereof in a manner whereby selected screws are movable into electrical contact with the current resistive member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.