Manual call point
US11450198B2 · kind B2 · utility
0Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2020 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Dec 2, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2003/0233
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A manual call point for a fire alarm system, the manual call point includes: an operating element 18, wherein a physical movement of the operating element 18 will trigger an alarm condition of the manual call point; at least two switch devices 12, 14, 16. Each switch device 12, 14, 16 is arranged to complete or break a circuit in response to the physical movement of the operating element 18. At least one of the switch devices 12, 14, 16 is a contactless device 12, 14 and the corresponding circuit includes an electromagnetic circuit that is completed or broken without mechanical contact from the operating element 18.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.