Combination speed transducer and speedometer cable
US4246790A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1979 |
| Grant date | Jan 27, 1981 |
| Priority date | — |
| Expiry date | Oct 22, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P1/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A speedometer cable for a vehicle driven from the vehicle transmission has a speed transducer incorporated in the end fitting which attaches to the transmission housing. The speed transducer comprises, for example, a reed switch driven by a permanent magnet which rotates with the speedometer cable core for opening and closing at a rate dependent on the speed of rotation. The transducer has one terminal grounded through the end fitting to the transmission housing and another lead electrically connected to the reinforcing wire of the speedometer cable. A terminal member with an insulation piercing clip is spaced at a position remote from the end fitting and makes contact with the reinforcing wire to provide an electrical connection between the remote terminal and the reed switch to allow transmission of an electrical speed signal from the reed switch to the remote terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.