Brake cable switch means
US4245139A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1979 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Jul 24, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2003/007
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brake cable switch is disclosed for indicating when a cable is tensioned at or beyond a predetermined value, comprising a hollow rectangular housing containing an hermetically sealed chamber, said housing including a flexible top wall having a convex outer surface the axis of which extends longitudinally along the housing, said top wall being biased away from the housing bottom wall, a pair of switch contacts mounted in the chamber for operation between a normal first electrical condition and a second electrical condition, and a pair of fastener devices arranged at opposite ends of the housing for mounting the housing on an untensioned brake cable. The fastener device deform portions of the untensioned cable on opposite sides of the apex of the convex portion of the top wall toward the end portions of the top wall surface, respectively, whereby when the cable tension exceeds a predetermined value, the convex portion of the housing top wall is deformed inwardly to operate the switch contacts to the second electrical condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.