Patent · US Expired

Touch contact

US4225766A · kind A · utility

16Cited by

7References

2Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Rolf Pfeifer · Oberuhldingen, DE
Jorn Wimmer · Nuremberg, DE

Key dates

Filing date	Feb 5, 1979
Grant date	Sep 30, 1980
Priority date	—
Expiry date	Feb 5, 1999

Classification

Technology area (CPC H)Electricity
CPC primaryH01H13/023
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A manually actuatable sliding short-stroke switch is provided with a light conducting cap attached to the sliding piece and a touch surface above the cap. A means for illuminating the touch surface is provided, and the light conducting cap is covered on its surface with a layer impermeable to light except for a selected area of the touch surface and a light instance area for receiving light from the source. The light conducting cap and the touch surface provide a means for actuating the switch substantially unaffected by fatigue due to repeated use and which can be illuminated without transferring light to adjacent touch surfaces.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.